falk™ series yb & ghb gear drives proven performance for

Falk™ Series YB & GHB Gear Drives Proven Performance for High ThermalCapacity Applications (English –Inch)

Falk™ Type YB & GHB Horizontal Right Angle Gear Drives

Since 1897, Falk gear drives have benefitted fromspecialized research, design, and constructionknow-how. These precision surface hardened bevel andthrough hardened helical right angle YB and GHB geardrives are based on earlier models that became thestandard in the early 1900’s. To maintain thereputation, and to keep a step ahead of today’sincreased industrial requirements, the 23 standard sizesnow transmit higher capacity (up to 3727 hp and2,684,000 lb-in output torque, without an increase inexternal dimensions. This means improved strength andperformance of gears, shafts, and bearings. To hold themin exact alignment day after day and year after year,extra strong, accurately machined housings are provided.

In addition, our Drive One and AB line of right angleshaft gear drives offer state-of-the-art surface hardenedhelical and bevel gearing.

Please note the features and advantages illustratedabove and described on Page 3. And as you review thebasic information on Pages 4 & 5, we hope you’ll sensethe Rexnord know-how that is as much a part of thesedrives as the Falk precision gears.

Rexnord . . . Products and Services Worldwide

Rexnord products and services are available 24 hours aday, worldwide. A network of distribution centers, salesoffices, and distributors, serves Rexnord customers inthe continental United States and Canada. Central andSouth America are served from offices in Brazil, Mexico,Chile, and Miami. Rexnord offices in Belgium, Denmark,Finland, France, Germany, Italy, Netherlands, and theUnited Kingdom service customers in Europe andRexnord Offices in Australia, Republic of South Africa,China, Taiwan, and Singapore, service customersthroughout Asia Pacific.

Around the world, no customers with Falk gear driveshave ever been without product or service because of awork stoppage. No matter where your operation islocated, Rexnord is ready, day or night, to help keep yourplant running.

2 (241-110) © Rexnord Industries, LLC, 1968, 2007.

Selection Guide 241-110, February 2007Table of ContentsAdvantages, design, and construction . . . . . . . . . . . . . . . . . . . 3Basic Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5How to Select . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6Service Factors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7Horsepower ratings. . . . . . . . . . . . 8, 10, 12, 14, 16, 18, 20, 22Torque Ratings . . . . . . . . . . . . . . . 9, 11, 13, 15, 17, 19, 21, 23Exact Ratios . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24-25Temperature and Altitude Factors . . . . . . . . . . . . . . . . . . . . . . 26Thermal Horsepower . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26-27Cooing Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28Overhung Load Ratings and Instructions . . . . . 29, 30, 31, 32, 33Dimensions and Weight, Units . . . . . . . . . . . . . . . . . 34, 35, 36Motor Brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37-38Bedplates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39-40Backstops. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41L.S. End Clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41Assemblies and Shaft Rotations . . . . . . . . . . . . . . . . . . . . . . . 42How to Order. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Factory Warranty — We’re so confident in the performance andreliability of these Falk heavy-duty gear drives that we’re backingthis comprehensive offering with the best standard warranty in thebusiness. Our full, 3-year Heavy-Duty Warranty provides“shaft-to-shaft” protection on all Falk components – includingbearings and seals (warranty extends for 3 years from date ofshipment). It’s an industry first... and one more powerful reasonwhy Rexnord is your ultimate bottom-line value.

Bearings — High capacity roller bearings have been designed toexceed minimum AGMA specifications for the most severe loadingconditions with minimum friction and easy starting. You can counton bearing life well in excess of industry standards for mostapplications. Rexnord’s more precise selection methods are basedon data obtained from actual tests of the drives.

Shafting — Large, heavy duty shaft diameters are designed tomaintain accurate support and alignment of gearing under themost adverse loading conditions, and provide optimum externalthrust and overhung load capacities. Double ended low speedshaft extensions can be supplied at no extra charge whenrequested.

No Leak Magnum SealsKeep Oil In — The Falk™ “Magnum” seal keeps oil in the driveand keeps dirt out. The inner cage has close fitting clearancesbetween the shaft and bearing race which prevent oil from leavingthe drive. The old drain back ensures an effective seal by returningany oil that gets beyond the bush seal, back into the drive. Sincethere are no moving parts, this throttling bush seal arrangementwill last as long as the drive is properly maintained.

Keep Dirt Out — An outer cover assembly when filled withgrease, prevents the ingress of foreign particles by trapping thembefore they enter the drive. Periodically, introducing fresh greasethrough the fitting in the cover will purge contaminants.

Rugged Housings — All steel housings provide maximumstrength and rigidity on Type YB drives. Accurate machiningensures precise alignment of all revolving elements necessary tomaintain engineering and performance advantages. The splithousing design with large inspection cover makes maintenanceeasy. Surfaces are smooth, flat, and easy to clean. The exterior iscoated with the highest quality zinc chromate primer. The finishcoat is sprayed with acid and alkali resistant enamel. Thick, extrastrong cast iron housings are provided for single reduction TypeGHB drives.

Precision Gearing — From the special alloy steel poured in ourown foundry through the final finishing operation, constant qualitycontrol is maintained at each manufacturing step. The Falk™ fulldepth tooth form with high pressure angle allows greater surfacedurability, greater resistance to abrasion and breaking, and moreload carrying capacity. High helical gear efficiency of 98½% pergear mesh remains constant throughout the entire life of the gears.

Positive Lubrication — Continuous splash system is positive andthorough, and provides higher thermal ratings through the use oflarge oil reservoir. Oil is carried to the working faces of the gearteeth through the oil troughs in the cover, then passes through thebearings. The system is basically simple, maintenance free andhighly effective. Oil levels are easily checked with standard oildipstick.

Falk™ Magnum Seal— The Falk Magnum seal shown below isalso available for previous model Y drives. Ask for Service Manual148-140 for retrofit instructions.

© Rexnord Industries, LLC, 1964, 2007. (141-110) 3

Copyright 1968, 2007, Rexnord Industries, LLC. All Rights Reserved. Litho in U.S.A. Rexnord,A+Plus, Drive One, Steelflex, and Ram are registered trademarks. Falk and Magnum Seal aretrademarks of Rexnord. Viton is a registered trademark of the DuPont company

The contents of this Selection Guide are subject to change without notice or obligation.Information contained herein should be confirmed before placing orders

Basic InformationSafety NotesFalk™ Gear Drives The Falk or Rexnord name on the gear driveis the purchaser’s assurance that the drive was engineered, ratedand manufactured to sound design practices.

The power supplied to the geared drive must be equal to or lessthan the power for which the drive was selected using theappropriate service factor for the application. The customer mustassume responsibility of isolating the geared drive from anyvibratory or transient load induced by the driven equipment.

Install and operate Falk products in conformance with applicablelocal and national safety codes and per Falk installation manualswhich are shipped with gear drives and are also available uponrequest. Suitable guards for rotating members may be purchasedfrom Falk as optional accessories. Consult your local Falk districtoffice for complete details.

People Conveying Equipment Selection of Falk products forapplications whose primary purpose is the transportation of peopleis not approved. This includes such applications as freight orpassenger elevators, escalators, man lift platforms and ski towsand ski lifts.

If the primary purpose of the application is material conveyanceand occasionally people are transported, the Falk warranty mayremain in effect provided the design load conditions are notexceeded and certification to the appropriate safety codes andload conditions has been obtained by the system designer or enduser from the appropriate enforcement authorities.

Gear Drive Ratings

All gear drive ratings in this selection guide allow 100% overloadfor starting loads and momentary overloads for electric motor drivenapplications operating 10 hours per day under uniform loadconditions (unity Service Factor). For other conditions, compute anequivalent horsepower by multiplying the actual horsepowerrequired for the application by the appropriate Service Factor.

Gear Drive Identification

Tables in this selection guide identify gear drives by size, type andratio. From the following inset, the drive designation is2070YB2indicating . . .

Horsepower and Torque

Gear drive mechanical horsepower and torque ratings aretabulated in the catalog to permit selections for specificapplication requirements.

When the required input speed falls between two tabulated inputspeeds of a drive with the same number of gear reductions,interpolate to determine drive rating.

Thermal Horsepower

Thermal horsepower is the actual horsepower (without ServiceFactor) that a gear drive will transmit continually for three hours ormore without overheating.

Thermal ratings need not be considered when the continuousoperating period does not exceed three hours and the shutdowntime equals or exceeds the running time. However, when therunning time exceeds the shutdown time, selection must be madeon a basis of adequate thermal rating.

Checking the thermal horsepower is extremely important. for If thedrive creates heat faster than it can be dissipated, severe damagemay occur.

When the horsepower or torque rating appears in bold type,compare the actual horsepower required (without Service Factor)with the thermal horsepower capacity. If the actual load exceedsthe thermal capacity, a fan (as described on Page 28) may beadded, an oil cooling system may be used, or a larger drive maybe selected.

Operating Temperature

Gear drives can encounter sump oil temperatures up to200°F(93°C) with higher temperatures possible in localizedareas.Since the drive will feel hot to the human hand attemperatures over 120°F (49°C), a portable pyrometer should beused to measure temperatures.


2070 DriveSize

DriveType

Number ofReductions

YB 2

TYPE YB2 HORSEPOWER RATINGS

HighSpeedShaftrpm

NominalRatio±4%

Approx.L..S.Shaftrpm

DRIVE SIZE

2050 2062 2070 2080 2090 2100 2110 2120

1750

5.06 350 129 195 224 379 407 678 691 8775.60 310 129 180 224 321 387 618 690 8156.20 280 127 184 224 342 407 678 691 8776.86 255 120 170 224 317 407 515 647 697

Conditions Affecting SelectionsNon-Standard Application ProceduresThe following conditions may affect the drive selection procedure,drive size, and auxiliary equipment being furnished.

Excessive Overloads — The maximum momentary or startingload must not exceed 200% of rated load (100% overload). Ratedload is defined as drive rating with a Service Factor of 1.0. If themaximum starting or momentary load exceeds the aboveconditions, compute a second equivalent horsepower by dividingthe peak load by two. The gear drive selected must have capacityequal to, or in excess of, the larger equivalent horsepower.

Reversing Service — Applications involving either more than 20reversals per 10 hour period, or less than 20 reversals per 10hour period with peak torques greater than 200% of normal loadmust be referred to the Factory.

Brake Equipped Applications — When a gear drive isequipped with a “working” brake that is used to decelerate themotion of the system and the brake is located between the primemover and the gear drive, select the drive based on the brakerating or the highest equivalent horsepower, whichever is greater.Ifthe brake is used for holding only and is applied after the motionof the system has come to rest, the brake rating must be less than200% of the catalog rating of the gear drive selected for theapplication. If the brake rating is greater than 200% of the geardrive catalog rating, refer the application to Factory. Also refer toFactory all applications in which the brake is located on the outputshaft of the gear drive.

Oversize Prime Movers — Published Service Factors do notcover applications that require oversize prime movers for highenergy or peak loads. Refer such applications to Factory forselection of suitable drives.

Speed Variation — For variable or multi-speed applications –Refer to Page 28 for speed ranges of gear drives. Variable ormulti-speed applications require special consideration to provideadequate splash lubrication at the slowest speed, but withoutexcessive heating or churning at the highest speed. It is essentialthat all orders indicate minimum and maximum speeds, as well asthe speed duration cycles.

Effects of Solar Energy — If a drive operates in the sun atambient temperatures over 100°F (38°C), then special measuresshould be taken to protect the drive from solar energy. Thisprotection can consist of a canopy over the drive or reflective painton the drive. If neither is possible, a heat exchanger or othercooling device may be required to prevent the sump temperaturefrom exceeding the allowable maximum of 200°F (93°C).

Overhung Loads and Thrust Loads — The overhung load andthrust ratings published in this selection guide are based on acombination of the most unfavorable conditions of rotation, speed,direction of applied load, and drive loading. If the calculated loadexceeds the published value, or if an overhung load and thrust loadare applied simultaneously to a shaft, refer complete applicationinformation to Factory. For more information, refer to tables andguidelines on Pages 29 through 33.

Product Modifications — Rexnord can supply special productmodifications to suit your application needs. Contact Factory forhousing modifications, special ratios, special shafts, specialmounting conditions, accessory modifications, and other specialapplication requirements.


How to SelectBefore making any selections, refer to the Basic Informationand Conditions Affecting Selections on Pages 4 and 5.How to select by hp method1. Determine Service Factor from Table 2 or 3. For occasionaland intermittent service or engine driven applications, refer to theinstructions and Table1 below.2. Calculate equivalent horsepower by multiplying the actualhorsepower to be transmitted by the Service Factor. If momentaryor peak loads exceed 200% of the normal load, refer to theintroductory instructions on Page 5.3. For ratio, divide high speed shaft rpm by low speed shaft rpm.4. Determine drive size and nearest standard ratio from theHorsepower Selection Tables on Pages 8 , 10,12, 14, 16, 18, 20,or 22. Opposite the high speed shaft rpm, and the desired ratioand output speed, trace right to a horsepower capacity equal to orin excess of the equivalent horsepower calculated in Step 2. Readthe size and type of drive at the top of the column. If the requiredhigh speed shaft rpm is not listed, select the nearest listed speed andproportion the required rpm and equivalent horse-power to suit.When the horsepower rating is shown in bold face type, check the drivethermal rating on Pages 26 or 27. If the thermal horsepower rating isless than the actual required horsepower (without Service Factor), referto Page 28 for information regarding Falk™ cooling fans.5. Check shaft connections as instructed on Page 29 and drivedimensions starting on Page 34.

How to select by torque method

Determine Service Factor, equivalent torque and drive selection byfollowing the same procedures outlined for the horsepower method, butin Step 4, refer to Torque Selection Tables on Pages 9, 11, 13, 15, 17,19, 21, or 23. Interpolate torques for speeds not listed.When torque rating is shown in bold face type, convert the actualrequired torque to horsepowerand check against the thermalratings on Pages 26 or 27. Toconvert, use the torque (lb-in)and speed (rpm) at low speed shaft of the drive in the following formula:Occasional and intermittent service or engine drivenapplicationsFor multi-cylinder engine driven applications and all applicationsoperating intermittently up to 3 hours per day, refer to Table 2 or3 for the Service Factor of the same application operating 3 to10hours per day. Next, in the first column of Table 1, find this sameService Factor in bold face type. Then, to the right, under the desiredhours service and prime mover, locate the converted Service Factor.For example, from Table 3, the Service Factor is 1.00 for a uniformlyloaded belt conveyor. From Table 1, for the same application, thefollowing are the Service Factors for various conditions.

1. Engine driven (multi-cylinder): 3-10 hours per day, use 1.25.

2. Engine driven (multi-cylinder): over 10 hours per day, use 1.50.

3. Motor driven: up to 3 hours per day, use 0.80.


hp =Torque x output speed

63,000

Table 1 — Service Factor Conversions

Table 2or 33 to 10 Hour

Service Factor

3 to 10 Hoursper Day

Over 10 Hours per DayIntermittent – Up to

3 Hours per Day †

Multi-CylEngine ‡ Motor

Multi-CylEngine ‡ Motor

Multi-CylEngine ‡

1.00 1.25 1.25 1.50 .80 1.001.25 1.50 1.50 1.75 1.00 1.251.75 2.00 2.00 2.25 1.50 1.752.00 2.25 2.25 2.50 1.75 2.00

† For applications operating one half hour or less per day and application driven bysingle cylinder engines, refer to Factory.

‡ These service factors are based on the assumption that the system is free fromserious critical and torsional vibrations and that maximum momentary or startingloads do not exceed 200% of the normal load.

TABLE 2 — Service Factors Listed by Industry

for electric motor, steam turbine, or hydraulic motors drives. . .Recommendations are MINIMUM and normal conditions are assumed.

Service

Industry 3 to10

Hour

Over10

Hour

BOTTLING AND BREWINGBottling Machinery . . . . . . . . . . 1.00 1.25Brew Kettles, Continuous Duty . . 1.00 1.25Can Filling machines. . . . . . . . . 1.00 1.25Cookers—Continuous Duty . . . . 1.00 1.25Mash Tubs—Continuous Duty . . 1.00 1.25Scale Hoppers—Frequent Starts . 1.25 1.50

CLAY WORKING INDUSTRYBrick Press . . . . . . . . . . . . . . . . 1.75 2.00Briquette Machines . . . . . . . . . . 1.75 2.00Clay Working Machinery . . . . . . 1.25 1.50Pug Mills . . . . . . . . . . . . . . . . . 1.25 1.50

DISTILLING (See Brewing)

DREDGESCable Reels, Conveyors. . . . . . . 1.25 1.50Cutter Head & Jig Drives . . . . . . 1.75 2.00Maneuvering Winches, Pumps . . 1.25 1.50Screen Drives . . . . . . . . . . . . . 1.75 2.00Stackers, Utility Winches . . . . . . 1.25 1.50

FOOD INDUSTRYBeet Slicers . . . . . . . . . . . . . . . 1.25 1.50Bottling, Can Filling Machine . . . 1.00 1.25Cereal Cookers . . . . . . . . . . . . 1.00 1.25Dough Mixers, Meat Grinders . . 1.25 1.50

LUMBER INDUSTRYBarkers—Spindle Feed . . . . . . . 1.25 1.50Barkers—Main Drive . . . . . . . . . 1.75 1.75Carriage Drive . . . . . . . . . . . . . Refer to FactoryConveyors

Burner . . . . . . . . . . . . . . . . 1.25 1.50Main or Heavy Duty . . . . . . 1.50 1.50Main Log . . . . . . . . . . . . . . 1.75 2.00Re-Saw Merry-Go-Round. . . 1.25 1.50Slab . . . . . . . . . . . . . . . . . . 1.75 2.00Transfer . . . . . . . . . . . . . . . 1.25 1.50

Chains—Floor . . . . . . . . . . . . 1.50 1.50Chains—Green . . . . . . . . . . . . 1.50 1.75Cut-Off Saws—Chain & Drag . . 1.50 1.75Debarking Drums . . . . . . . . . . . 1.75 2.00Feeds—Edger . . . . . . . . . . . . . 1.25 1.50Feeds—Gang . . . . . . . . . . . . . 1.75 1.75Feeds—Trimmer . . . . . . . . . . . . 1.25 1.50Log Deck . . . . . . . . . . . . . . . . . 1.75 1.75Log Hauls—Incline, Well Type . . 1.75 1.75Log Turning Devices . . . . . . . . . 1.75 1.75Planer Feed . . . . . . . . . . . . . . . 1.25 1.50Planer Tilting Hoists. . . . . . . . . . 1.50 1.50Rolls—Live—Off Bearing—Roll Cases 1.75 1.75Sorting Table, Tipple Hoist . . . . . 1.25 1.50Transfers—Chain & Craneway . . 1.50 1.75Tray Drives . . . . . . . . . . . . . . . 1.25 1.50Veneer Lathe Drives . . . . . . . Refer to Factory

OIL INDUSTRYChillers . . . . . . . . . . . . . . . . . . 1.25 1.50Oil Well Pumping . . . . . . . . . . . . Refer to FactoryParaffin Filter Press . . . . . . . . . . 1.25 1.50Rotary Kilns . . . . . . . . . . . . . . . 1.25 1.50

PAPER MILLS �

Agitator (Mixer) . . . . . . . . . . . . . . . 1.50Agitator for Pure Liquids . . . . . . . . . 1.25Barking Drums, Barkers—Mech. . . . . 2.00Beater . . . . . . . . . . . . . . . . . . . . . . 1.50Breaker Stack . . . . . . . . . . . . . . . . 1.25Calender� . . . . . . . . . . . . . . . . . . . . . . . 1.25Chipper . . . . . . . . . . . . . . . . . . . . . 2.00Chip Feeder . . . . . . . . . . . . . . . . . 1.50Coating Rolls . . . . . . . . . . . . . . . . 1.25Conveyors— . . . . . . . . . . . . . .

Chip, Bark, Chemical . . . . . . . . 1.25Log (incl. Slab) . . . . . . . . . . . . . 2.00

Couch Rolls . . . . . . . . . . . . . . . . . . 1.25Cutter . . . . . . . . . . . . . . . . . . . . . . 2.00Cylinder molds . . . . . . . . . . . . . . . 1.25Dryers�— . . . . . . . . . . . . . . . . . . . . .

Paper Mach. & Conveyor Type . . . 1.25

Service

Industry 3 to10

Hour

Over10

HourEmbosser . . . . . . . . . . . . . . . . . . . . 1.25Extruder . . . . . . . . . . . . . . . . . . . . . 1.50

Fourdrinier Rolls—Lumpbreaker, Wire TurningDandy & Return Rolls. . . . . . . . . 1.25

Jordan . . . . . . . . . . . . . . . . . . . . . . 1.50Kiln Drive . . . . . . . . . . . . . . . . . . . . 1.50Mt. Hope & Paper Rolls . . . . . . . . . . 1.25Platter . . . . . . . . . . . . . . . . . . . . . . 1.50Presses (Felt & Suction) . . . . . . . . . . 1.25Pulper (Continuous). . . . . . . . . . . . . 1.50Repulper (Heavy Shock) . . . . . . . . . . 2.00Reel (Surface Type) . . . . . . . . . . . . . 1.25Screens . . . . . . . . . . . . . . . . . .

Chip & Rotary . . . . . . . . . . . . . . 1.50Vibrating. . . . . . . . . . . . . . . . . . 2.00

Size Press . . . . . . . . . . . . . . . . . . . . 1.25Super Calenders� . . . . . . . . . . . . . . 1.25

Thickener & WasherAC Motor . . . . . . . . . . . . . . . . . 1.50DC Motor . . . . . . . . . . . . . . . . . 1.25

Vacuum Pumps . . . . . . . . . . . . . . . 1.50Wind & Unwind Stand . . . . . . . . . . . 1.25Winders (Surface Type) . . . . . . . . . . 1.25Yankee Dryers� . . . . . . . . . . . . . . . 1.25

PLASTIC INDUSTRYBatch Drop Mill, 2 smooth rolls . 1.25 1.25Calenders . . . . . . . . . . . . . . . . 1.50 1.50Compounding Mills. . . . . . . . . . 1.25 1.25Continuous Feed, Holding &Blend Mill . . . . . . . . . . . . . . . .

1.25 1.25

Extruders . . . . . . . . . . . . . . . . . 1.50 1.50Variable Speed Drive. . . . . . 1.50 1.50Fixed Speed Drive . . . . . . . . 1.75 1.75

Intensive Internal Mixers. . . . . . .Batch Mixers . . . . . . . . . . . . 1.75 1.75Continuous Mixers . . . . . . . 1.50 1.50

RUBBER INDUSTRYBatch Drop Mill, 2 smooth rolls . 1.50 1.50Calenders . . . . . . . . . . . . . . . . 1.50 1.50Cracker, 2 corrugated rolls . . . . 2.00 2.00Cracker Warmer—2 roll,1 corrugated roll. . . . . . . . . . . .

1.75 1.75

Extruders . . . . . . . . . . . . . . . . .Continuous Screw Operation 1.50 1.50Intermittent Screw Operation 1.75 1.75

Holding, Feed & Blend Mill—2 Roll . . . . . . . . . . . . . . . . . . .

1.25 1.25

Intensive Internal Mixers. . . . . . .Batch Mixers . . . . . . . . . . . . 1.75 1.75Continuous Mixers . . . . . . . 1.50 1.50

Mixing Mill—2 smooth rolls . . . .(if corrugated rolls are used,use Cracker Warmerservice factors) . . . . . . . . . .

1.50 1.50

Refiner—2 roll . . . . . . . . . . . . . 1.50 1.50

SEWAGE DISPOSALBar Screens . . . . . . . . . . . . . . . 1.00 1.25Chemical Feeders . . . . . . . . . . . 1.00 1.25Collectors . . . . . . . . . . . . . . . . 1.00 1.25Dewatering Screens. . . . . . . . . . 1.25 1.50Scum Breakers . . . . . . . . . . . . 1.25 1.50Slow or Rapid Mixers . . . . . . . . . 1.25 1.50Thickeners . . . . . . . . . . . . . . . . 1.25 1.50Vacuum Filters . . . . . . . . . . . . 1.25 1.50

SUGAR INDUSTRYCane Knives, Crushers . . . . . . . . . . 1.50Mills (low speed end). . . . . . . . . . . . 2.00

TEXTILE INDUSTRYBatchers, Calenders . . . . . . . . . 1.25 1.50Card Machines . . . . . . . . . . . . 1.25 1.50Dry Cans, Dryers. . . . . . . . . . . . 1.25 1.50Dyeing Machinery . . . . . . . . . . . 1.25 1.50Knitting Machinery. . . . . . . . Refer to FactoryLooms, Mangles, Nappers, Pads . . 1.25 1.50Range Drives. . . . . . . . . . . Refer to FactorySlashers, Soapers, Spinners,

Tenter Frames, Washers, Winders1.25 1.50

WINDLASS · · · · · · · · · · · · · · · Refer to Factory

� Service Factors for paper mill applications are applied to the nameplate rating ofthe electric drive motor at the motor rated base speed and are consistent with thoseshown in TAPPI standards.

� Anti-friction bearings only.

� A service factor of 1.00 may be applied at base speed of a super calenderoperating over a speed range of part constant hp and part constant torque wherethe constant hp speed range is greater than 1.5 to 1. A service factor of 1.25 isapplicable to super calenders operating at constant torque over the entire speedrange or where the constant hp speed range is less than 1.5 to 1.


TABLE 3 — Service Factors Listed by Application

for electric motor, steam turbine or hydraulic motor drives . . . recommendations are MINIMUM and normal conditions are assumed

Service

Application 3 to10

Hour

Over10

Hour

AGITATORSPure Liquids . . . . . . . . . . . . . . . . 1.00 1.25Liquids & Solids. . . . . . . . . . . . . . 1.25 1.50Liquids-Variable Density. . . . . . . . 1.25 1.50

APRON CONVEYORSUniformly Loaded or Fed . . . . . . . 1.00 1.25Heavy Duty . . . . . . . . . . . . . . . . 1.25 1.50APRON FEEDERS . . . . . . . . . 1.25 1.50

ASSEMBLY CONVEYORSUniformly Loaded or Fed . . . . . . . 1.00 1.25Heavy Duty . . . . . . . . . . . . . . . . 1.25 1.50BALL MILLS · · · · · · · · · · · · · · See Mills, RotaryBARGE HAUL PULLERS . . . . . 1.75 2.00

BARKINGDrums (Coupling Connected). . . . . . . 2.00Mechanical . . . . . . . . . . . . . . . . . . . 2.00

BAR SCREENS (Sewage) 1.00 1.25

BATCHERS (Textile) . . . . 1.25 1.50

BELT CONVEYORSUniformly Loaded or Fed . . . . . . . 1.25 1.25Heavy Duty . . . . . . . . . . . . . . . . 1.25 1.50

BELT FEEDERS . . . . . . . . 1.25 1.50

BENDING ROLLS (Machine) 1.25 1.50

BLOWERSCentrifugal . . . . . . . . . . . . . . . . 1.00 1.25Lobe . . . . . . . . . . . . . . . . . . . . 1.25 1.50Vane . . . . . . . . . . . . . . . . . . . . 1.00 1.25

BOTTLING MACHINERY 1.00 1.25

BREWING . . . . . . . . . . . See Table 2

BRICK PRESS (Clay Working) 1.75 2.00

BRIQUETTE MACHINES (ClayWorking) . . . . . . . . . . .

1.75 2.00

BUCKETConveyors Uniform . . . . . . . . . . . 1.00 1.25Conveyors Heavy Duty. . . . . . . . . 1.25 1.50Elevators Continuous. . . . . . . . . . 1.00 1.25Elevators Uniform . . . . . . . . . . . . 1.00 1.25Elevators Heavy Duty . . . . . . . . . . 1.25 1.50

CALENDERSRubber and Plastic . . . . . . . . . . . See Table 2Textile . . . . . . . . . . . . . . . . . . . . 1.25 1.50

CANE KNIVES . . . . . . . . . . . 1.50

CAN FILLING MACHINES 1.00 1.25

CARD MACHINES (Textile) 1.25 1.50

CAR DUMPERS . . . . . . . 1.75 2.00

CAR PULLERS . . . . . . . . 1.25 1.50CEMENT KILNS · · · · · · · · · · · See Mills, RotaryCENTRIFUGALBlower, Compressors,

Discharge Elevators,Fans or Pumps . . . . . . . . . . . . 1.00 1.25

CHAIN CONVEYORS

Uniformly Loaded or Fed . . . . . . . 1.00 1.25Heavy Duty . . . . . . . . . . . . . . . . 1.25 1.50

CHEMICAL FEEDERS(Sewage) . . . . . . . . . . . 1.00 1.25

CLARIFIERS . . . . . . . . . . . . . . 1.00 1.25

CLASSIFIERS . . . . . . . . . 1.25 1.50

CLAY WORKING See Table 2

COLLECTORS (Sewage) 1.00 1.25

COMPRESSORSCentrifugal . . . . . . . . . . . . . . . . 1.00 1.25Lobe . . . . . . . . . . . . . . . . . . . . . 1.25 1.50Reciprocating

Multi-Cylinder . . . . . . . . . . . . . 1.25 1.50Single-Cylinder . . . . . . . . . . . . 1.75 2.00

CONCRETE MIXERSContinuous . . . . . . . . . . . . . . . . 1.25 1.50Intermittent . . . . . . . . . . . . . . . . 1.25 1.50

Service

Application 3 to10

Hour

Over10

Hour

� CONVEYORS—UniformlyLoaded or Fed:

Apron or Bucket. . . . . . . . . 1.00 1.25Assembly, Belt, Chain,

Flight, Oven, Screw. . . . . . .1.00 1.25

� CONVEYORS—Heavy Duty,Not Uniformly Fed

Apron, Assembly, Belt, . . . .Bucket, Chain, . . . . . . . . .Flight,Oven, Screw. . . . . . .

1.25 1.50

CONVEYORS—Severe DutyLive Roll . . . . . . . . . . . . . . . . . . . Refer to FactoryReciprocating Shaker. . . . . . . . . . 1.75 2.00

COOKERS (Brewing &Distilling), (food) . . . . .

1.00 1.25

COOLING TOWER FANS Refer to Factory

� CRANESDry Dock Cranes . . . . . . . . . . . . � �Main Hoists . . . . . . . . . . . . . . . . 1.00 1.25Bridge and Trolley Travel . . . . . . . Refer to Factory

CRUSHERSOre or Stone . . . . . . . . . . . . . . . 1.75 2.00Sugar . . . . . . . . . . . . . . . . . . . . . . . 1.50

DEWATERING SCREENS(Sewage) . . . . . . . . . . . 1.25 1.50

DISC FEEDERS. . . . . . . . 1.00 1.25

DISTILLING . . . . . . . . . . See Table 2

DOUBLE ACTING PUMPS

2 or more Cylinders . . . . . . . . . . 1.25 1.50Single Cylinder . . . . . . . . . . . . . . Refer to Factory

DOUGH MIXER (Food) . 1.25 1.50

DRAW BENCH (Metal Mills)Carriage & Main Drive 1.25 1.50

DREDGES . . . . . . . . . . . See Table 2

DRY DOCK CRANES · · · . . . . � �

DRYERS & COOLERS (Mills,Rotary) . . . . . . . . . . . . . . . . 1.50

DYEING MACHINERY(Textile) . . . . . . . . . . . . 1.25 1.50

ELEVATORSBucket-Uniform Load. . . . . . . . . . 1.00 1.25Bucket-Heavy Duty . . . . . . . . . . . 1.25 1.50Bucket-Continuous . . . . . . . . . . . 1.00 1.25Centrifugal Discharge . . . . . . . . . 1.00 1.25Escalators . . . . . . . . . . . . . . . . . Not ApprovedFreight . . . . . . . . . . . . . . . . . . . Not ApprovedGravity Discharge . . . . . . . . . . . . 1.00 1.25Man Lifts, Passenger . . . . . . . . . . Not Approved

EXTRUDERS(Plastic & Rubber) . . . . See Table 2

FANSCentrifugal . . . . . . . . . . . . . . . . 100 1.25Cooling Towers. . . . . . . . . . . . . . Refer to FactoryForced Draft . . . . . . . . . . . . . . . . . . 1.25Induced Draft . . . . . . . . . . . . . . 1.25 1.50Large (Mine, etc.) . . . . . . . . . . . . 1.25 1.50Large lndustrial . . . . . . . . . . . . . . 1.25 1.50Light (Small Diameter) . . . . . . . . . 1.00 1.25

FEEDERS

Apron, Belt . . . . . . . . . . . . . . . . 1.25 1.50Disc . . . . . . . . . . . . . . . . . . . . 1.00 1.25Reciprocating . . . . . . . . . . . . . . 1.75 2.00Screw . . . . . . . . . . . . . . . . . . . . 1.25 1.50

FLIGHT CONVEYORSUniform . . . . . . . . . . . . . . . . . . . 1.00 1.25Heavy . . . . . . . . . . . . . . . . . . . . 1.25 1.50

FOOD INDUSTRY. . . . . . See Table 2

GENERATORS (Not Welding) 1.00 1.25

GRAVITY DISCHARGEELEVATORS . . . . . . . . . . . .

HAMMER MILLS . . . . . . . . . .

1.001.75

1.252.00

Service

Application 3 to10

Hour

Over10

Hour

� HOISTSHeavy Duty . . . . . . . . . . . . . . . . 1.75 2.00Medium Duty . . . . . . . . . . . . . . 1.25 1.50Skip Hoist . . . . . . . . . . . . . . . . . 1.25 1.50

INDUCED DRAFT FANS 1.25 1.50KILNS· · · · · · · · · · · · · · · · · · · See Mills, RotaryLAUNDRY WASHERS. . . 1.25 1.50

LAUNDRY TUMBLERS . . 1.25 1.50

LINE SHAFTS

Driving Processing Equipment . . . 1.25 1.50Other Line Shafts, Light . . . . . . . . 1.00 1.25LIVE ROLL CONVEYORS Refer to Factory

LOBE BLOWERS ORCOMPRESSORS . . . . . . 1.25 1.50

LOG HAULS (Lumber)Incline-well Type . . . . . . . . . . . . . 1.75 1.75

LOOMS (Textile) . . . . . . 1.25 1.50

LUMBER INDUSTRY. . . . See Table 2

MACHINE TOOLSAuxiliary Drives . . . . . . . . . . . . . . 1.00 1.25Bending Rolls . . . . . . . . . . . . . . 1.25 1.50Main Drives . . . . . . . . . . . . . . . . 1.25 1.50Notching Press (Belted) . . . . . . . . Refer to FactoryPlate Planers . . . . . . . . . . . . . . . 1.75 2.00Punch Press (Geared) . . . . . . . . . 1.75 2.00Tapping machines. . . . . . . . . . . . 1.75 2.00

MANGLE (Textile) . . . . . 1.25 1.50

MASH TUBS (Brewing &Distilling) . . . . . . . . . . . 1.00 1.25

MEAT GRINDERS (Food) 1.25 1.50

METAL MILLS

Draw Bench Carriages &Main Drives . . . . . . . . . . . . . .

1.25 1.50

Pinch, Dryer & ScrubberRolls, Reversing . . . . . . . . . . . . Refer to Factory

Slitters . . . . . . . . . . . . . . . . . . . . 1.25 1.50Table Conveyors, . . . . . . . . . . . .Non-Reversing Group Drives . . . . 1.25 1.50

Non-Reversing IndividualDrives . . . . . . . . . . . . . . . . . 1.75 2.00Reversing . . . . . . . . . . . . . . Refer to Factory

Wire Drawing & FlatteningMachines . . . . . . . . . . . . . . . . . . 1.25 1.50Wire Winding Machines. . . . . . . . 1.25 1.50

MILLS, ROTARYBall and Rod Mill

with Spur Ring Gear . . . . . . . . . . . 2.20with Helical Ring Gear. . . . . . . . . . 1.65Direct Connected . . . . . . . . . . . . . 2.20

Cement Kilns, Dryers & CoolersPebble, Plain & Wedge BarMills . . . . . . . . . . . . . . . . . . . .

. . . 1.65

Tumbling Barrels . . . . . . . . . . . . . 1.75 2.00

MIXER (Also see Agitators)Concrete, Cont. & lnt. . . . . . . . . . 1.25 1.50Constant Density . . . . . . . . . . . . . 1.00 1.25Variable Density . . . . . . . . . . . . . 1.25 1.50

NAPPERS (Textile) . . . . . 1.25 1.50

OIL INDUSTRY . . . . . . . See Table 2

ORE CRUSHERS . . . . . . . . . . 1.75 2.00

OVEN CONVEYORSUniform . . . . . . . . . . . . . . . . . . . 1.00 1.25Heavy Duty . . . . . . . . . . . . . . . . 1.25 1.50

PAPER MILLS . . . . . . . . . See Table 2

� PASSENGER ELEVATORS Not Approved

PEBBLE MILLS . . . . . . . . . . . 1.50PLATE PLANERS . . . . . . . . . . 1.75 2.00PRINTING PRESSES · · · · · · · · Refer to FactoryPROPORTIONING PUMPS . . 1.25 1.50

PUG MILLS (Clay) . . . . . 1.25 1.50

PULLERS (Barge Haul). . 1.75 2.00

Service

Application 3 to10

Hour

Over10

Hour

PUMPSCentrifugal . . . . . . . . . . . . . . . . 1.00 1.25Proportioning . . . . . . . . . . . . . . 1.25 1.50Reciprocating . . . . . . . . . . . . . . .

Single Act., 3 or more Cyl. . 1.25 1.50Double Act., 2 or more Cyl. 1.25 1.50Single Act., 1 or 2 Cyl. . . . . Refer to FactoryDouble Acting, 1 Cyl. . . . . . Refer to Factory

Rotary: Gear, Lobe, Vane . . . . . . 1.00 1.25PUNCH PRESSES (GearDriven). . . . . . . . . . . . . . . . . . 1.75 2.00

RECIPROCATINGConveyors & Feeders. .

1.75 2.00

RECIPROCATINGCOMPRESSORS

MultI-Cylinder . . . . . . . . . . . . . . 1.25 1.75Single Cylinder . . . . . . . . . . . . . . 1.75 2.00ROD MILLS · · · · · · · · · · · · · · See Mills, RotaryROTARYPumps . . . . . . . . . . . . . . . . . . . . 1.00 1.25Screens (Sand or Gravel) . . . . . . . 1.25 1.50

RUBBER & PLASTICSINDUSTRIES . . . . . . . . . See Table 2

SAND MULLERS . . . . . . . . . . 1.25 1.50

SCREENSAir Washing . . . . . . . . . . . . . . . 1.00 1.25Rotary—Sand or Gravel. . . . . . . . 1.25 1.50Traveling Water Intake. . . . . . . . . 1.00 1.25

SCREW CONVEYORSUniform . . . . . . . . . . . . . . . . . . . 1.00 1.25Heavy Duty or Feeder . . . . . . . . . 1.25 1.50

SCUM BREAKERS (Sewage) 1.25 1.50

SEWAGE DISPOSAL . . . See Table 2

SHAKER CONVEYORS . . . . . 1.75 2.00

SHEETERS (Rubber) . . . . . . . . . . 1.50

SINGLE ACTING PUMP

I or 2 Cylinders . . . . . . . . . . . . . . Refer to Factory3 or more Cylinders . . . . . . . . . . 1.25 1.50

� SKI TOWS & LIFTS . . . Not Approved

� SKIP HOIST . . . . . . . . 1.25 1.50

SLAB PUSHERS . . . . . . . 1.25 1.50

SLITTERS (Metal) . . . . . . 1.25 1.50

SLUDGE COLLECTORS(Sewage) . . . . . . . . . . . 1.00 1.25

SOAPERS (Textile) . . . . . 1.25 1.50SPINNERS (Textile) . . . . . . . . 1.25 1.50STEERING GEARS · · · · · · · · · Refer to FactorySTOKERS . . . . . . . . . . . . . . . . 1.00 1.25

STONE CRUSHERS . . . . 1.75 2.00SUGAR INDUSTRY . . . . . . . . See Table 2

TABLE CONVEYORS(Non-Reversing)

Group Drives . . . . . . . . . . . . . . 1.25 1.50Individual Drives . . . . . . . . . . . . . 1.75 2.00Reversing . . . . . . . . . . . . . . . . . . Refer to Factory

TENTER FRAMES (Textile) 1.25 1.50

TEXTILE INDUSTRY . . . . See Table 2

THICKENERS (Sewage) . . . . 1.25 1.50

TUMBLING BARRELS . . . 1.75 2.00VACUUM FILTERS (Sewage) 1.25 1.50

VANE BLOWERS . . . . . . 1.00 1.25

WINCHES (Dredges) . . . 1.25 1.50

WINDERS (Textile) . . . . 1.25 1.50

WINDLASS . . . . . . . . . . Refer to Factory

WIREDrawing Machines . . . . . . . . . . . 1.25 1.50Winding Machines . . . . . . . . . . . 1.25 1.50

� Selection of Falk products for applications whose primary purpose is thetransportation of people is not approved. This includes such application asfreight or passenger elevators, escalators, man lifts, work lift platforms and skitows and ski lifts.If the primary purpose of the application is material conveyance andoccasionally people are transported, the Rexnord warranty may remain in effectprovided the design load conditions are not exceeded and certification to theappropriate safety codes and load conditions have been obtained by the systemdesigner or end user from the appropriate enforcement authorities.

� DRY DOCK CRANES (Hammerhead, Rotating and Whirler, Stationary orMoving), for ANY DURATION OF SERVICE: Main Hoist, Auxiliary Hoist, Boom(Luffing): 1.00; Rotating (Swing or Slew): 1.25; Tracking (Drive Wheel): 1.50.

Refer to Factory for proper selection of a Falk™ RAM® mixer drive.

Type GHB1/Horsepower RatingsRatios 1.50 through 5.06 Single Reduction 1750 through 100 rpm


HighSpeedShaftrpm

NominalRatio

±3%

Approx.L.S. Shaft

rpm

DRIVE SIZE �

2050 2060 2070 2080 2090 2100 2110 2120

1750

1.50 1170 127 186 205 388 7651.84 950 129 195 224 411 691 11272.25 780 91.5 162 210 367 598 996 15692.76 640 77.4 110 169 303 474 799 1276 24053.38 520 70.5 111 145 250 415 664 1027 20594.13 420 50.5 78.5 111 189 357 605 946 17675.06 350 47.4 74.7 104 178 288 488 752 1429

1430

1.50 950 110 152 168 317 664 11051.84 780 112 159 183 336 600 978 15402.25 640 74.8 134 182 318 519 865 1362 25492.76 520 63.9 90.8 145 263 412 693 1108 2088

3.38 420 61.2 96.5 126 217 354 577 892 17874.13 350 41.5 64.6 91.5 156 293 525 822 15345.06 280 40.1 61.5 90.7 155 236 424 653 1193

1170

1.50 780 95.7 125 137 259 577 960 15201.84 640 97.6 130 150 275 521 850 1338 25002.25 520 61.2 111 155 277 431 752 1183 22152.76 420 52.7 74.9 120 223 353 602 963 1814

3.38 350 53.2 83.9 109 189 289 501 775 15084.13 280 34.2 53.2 75.4 129 239 456 714 13335.06 230 33.0 50.5 78.6 132 193 368 567 994

870

1.50 580 77.8 92.7 102 193 443 780 1235 18381.84 470 79.3 96.8 111 204 389 691 1087 18592.25 390 45.5 83.6 115 210 321 611 962 18002.76 320 39.5 55.7 90.0 168 262 490 782 1474

3.38 260 40.0 65.0 88.9 143 215 402 630 11224.13 210 25.6 39.8 56.5 96.6 178 371 580 10025.06 175 24.6 37.8 58.9 98.6 143 299 461 754

720

1.50 480 65.2 76.7 84.5 160 366 667 1068 15211.84 390 65.8 80.1 92.0 169 322 593 918 15382.25 320 37.6 69.6 95.2 174 265 535 842 15652.76 260 32.8 46.1 74.9 140 217 429 685 1286

3.38 210 33.3 53.8 75.4 119 178 332 552 9284.13 175 21.2 33.1 47.0 80.3 147 310 508 8295.06 140 20.4 31.4 48.9 82.0 119 250 404 630

580

1.50 390 52.9 61.8 68.1 129 295 537 861 12251.84 320 53.0 64.6 74.1 136 259 478 739 12392.25 260 30.3 56.4 76.7 140 214 454 724 12602.76 210 26.6 37.1 60.6 114 175 366 589 1036

3.38 175 26.9 43.3 60.7 96.4 144 268 474 7484.13 140 17.1 26.7 38.0 65.0 119 250 437 6685.06 115 16.5 25.3 39.5 66.3 95.6 202 347 512

100

1.50 66 9.13 10.7 11.7 22.2 50.9 92.6 148 2111.84 54 9.14 11.1 12.8 23.5 44.7 82.4 127 2142.25 45 5.23 9.91 13.2 24.2 36.9 78.2 133 2172.76 36 4.64 6.40 10.5 20.0 30.1 63.2 108 179

3.38 30 4.69 7.47 10.5 16.6 24.7 46.2 112 1294.13 24 2.98 4.65 6.63 11.4 20.5 43.1 89.8 1155.06 20 2.87 4.41 6.81 11.6 16.5 34.8 69.6 91.0

� Mechanical hp ratings shown in bold face type exceed the drive thermal ratings. Check required hp (without service factor) against thermal hp ratings on Page 27. Forratings at speeds higher than 1750 rpm, contact Factory.

Type GHB1/Torque RatingsRatios 1.50 through 5.06 Single Reduction 1750 through 100 rpm


(POUND-INCHES AT LOW SPEED SHAFT. . .MULTIPLY VALUES LISTED BELOW BY 1000)

HighSpeedShaftrpm

NominalRatio

±3%

Approx.L.S. Shaft

rpm

DRIVE SIZE �

2050 2060 2070 2080 2090 2100 2110 2120

1750

1.50 1170 6.77 9.92 10.9 20.7 40.81.84 950 8.40 12.9 15.0 27.2 46.4 74.72.25 780 7.45 13.2 17.1 29.9 48.7 81.1 1282.76 640 7.62 10.9 16.8 29.8 47.2 79.5 126 238

3.38 520 8.39 13.2 17.3 30.3 50.3 80.2 124 2504.13 420 7.40 11.5 16.3 27.7 52.3 88.7 139 2635.06 350 8.67 13.7 19.0 32.6 52.4 89.3 138 262

1430

1.50 950 7.18 9.92 11.0 20.7 43.3 72.11.84 780 8.93 12.9 15.0 27.2 49.3 79.3 1262.25 640 7.45 13.3 18.1 31.7 51.7 86.2 136 2542.76 520 7.69 11.1 17.7 31.7 50.2 84.4 134 253

3.38 420 8.92 14.1 18.4 32.2 52.5 85.3 132 2654.13 350 7.44 11.6 16.4 28.0 52.6 94.2 147 2795.06 280 8.98 13.8 20.3 34.7 52.6 95.0 146 267

1170

1.50 780 7.63 9.97 10.9 20.7 46.0 76.6 1211.84 640 9.51 12.9 15.1 27.2 52.3 84.2 133 2512.25 520 7.45 13.5 18.9 33.7 52.5 91.5 144 2702.76 420 7.76 11.2 17.9 32.8 52.6 89.6 142 269

3.38 350 9.48 14.9 19.4 34.3 52.4 90.6 140 2744.13 280 7.50 11.7 16.5 28.3 52.4 100 157 2975.06 230 9.03 13.8 21.5 36.1 52.6 101 155 272

870

1.50 580 8.35 9.94 10.9 20.7 47.5 83.7 132 1971.84 470 10.4 12.9 15.0 27.2 52.5 921 146 2512.25 390 7.45 13.7 18.8 34.4 52.6 100 151 2952.76 320 7.82 11.2 18.0 33.3 52.5 98.1 155 294

3.38 260 9.58 15.6 21.3 34.9 52.4 97.7 153 2744.13 210 7.55 11.7 16.7 28.5 52.5 109 171 3005.06 175 9.06 13.9 21.7 36.3 52.4 110 170 278

720

1.50 480 8.45 9.94 11.0 20.7 47.4 86.5 138 1971.84 390 10.4 12.9 15.0 27.2 52.5 95.5 149 2512.25 320 7.44 13.8 18.8 34.4 52.4 106 167 3102.76 260 7.84 11.2 18.1 33.5 52.5 104 164 309

3.38 210 9.64 15.6 21.8 35.1 52.5 97.5 162 2744.13 175 7.55 11.8 16.7 28.6 52.4 110 181 3005.06 140 9.07 14.0 21.8 36.5 52.7 111 180 280

580

1.50 390 8.51 9.94 11.0 20.8 47.5 86.4 139 1971.84 320 10.4 12.9 15.0 27.2 52.4 95.5 149 2512.25 260 7.44 13.9 18.8 34.4 52.6 111 178 3092.76 210 7.90 11.1 18.2 33.8 52.6 110 175 309

3.38 175 9.66 15.6 21.8 35.3 52.7 97.7 173 2744.13 140 7.56 11.8 16.8 28.7 52.6 111 193 3005.06 115 9.11 14.0 21.8 36.6 52.5 112 192 283

100

1.50 66 8.52 9.99 10.9 20.7 47.5 86.4 138 1971.84 54 10.4 12.9 15.0 27.2 52.5 95.5 148 2512.25 45 7.45 14.1 18.8 34.5 52.6 111 189 3092.76 36 7.99 11.1 18.3 34.4 52.4 110 186 310

3.38 30 9.77 15.6 21.9 35.2 52.4 97.7 237 2744.13 24 7.64 11.9 17.0 29.2 52.6 111 230 2995.06 20 9.19 14.1 21.8 37.1 52.6 111 223 291

� Torque ratings shown in bold face type exceed the drive thermal ratings. Convert required torque (without service factor) to hp and check against thermal hp ratings onPage 27. For ratings at speeds higher than 1750 rpm, contact Factory; below 580 rpm, use torques for 580 rpm.

Type YB2/Horsepower RatingsRatios 5.06 through 31.39 Double Reduction 1750 through 1170rpm


HighSpeedShaftrpm

NominalRatio�4%

Approx.L.S.

Shaftrpm

DRIVE SIZE �

2050 2060 2070 2080 2090 2100 2110 2120 2125 2130 2135 2140 2145 2150 2155 2160 2165 2170 2175 2180 2185 2190 2195

1750

5.06 350 129 195 224 379 407 678 691 877 982 1006 1127 1688 18915.60 310 129 180 224 321 387 618 690 815 913 1008 1129 1490 16696.20 280 127 184 224 342 407 678 691 877 982 1006 1127 1688 18916.86 255 120 170 224 317 407 515 647 697 781 991 1110 1290 1445

7.59 230 112 164 221 303 407 620 691 841 942 1006 1127 1581 17718.40 210 99.1 138 192 271 379 583 690 875 980 1008 1129 1481 16599.30 190 78.9 137 184 255 348 488 638 799 895 949 1063 1344 1505

10.29 170 78.5 114 162 227 321 438 570 705 790 936 1048 1238 1387

11.39 155 76.2 110 153 217 295 428 481 584 654 768 860 1069 1197 2124 237912.61 140 67.2 105 134 192 272 403 438 607 680 788 882 1063 1190 1400 1567 2326 260513.95 125 54.7 98.2 129 186 223 346 443 554 620 646 723 967 1083 1136 1272 1958 219315.44 115 54.4 78.5 113 160 227 310 406 504 564 664 743 893 1000 1011 1132 1420 1590

Refer to YB3 Tables onPage 14 for Selections

17.09 100 50.5 78.5 106 157 185 298 342 416 466 544 609 769 861 966 1082 1242 139118.91 90 46.0 65.4 95.9 135 189 281 347 419 470 562 629 769 862 860 963 1308 146420.93 84 38.1 58.9 88.7 132 157 246 308 382 428 459 514 669 749 812 909 1106 123923.16 75 37.9 51.2 75.3 111 158 221 289 356 399 475 532 623 698 846 947 1114 1247

25.63 68 31.1 46.0 72.5 92.6 128 200 243 294 329 388 435 546 611 688 770 943 105628.36 60 26.9 36.9 59.5 81.0 113 182 221 262 293 348 390 476 533 611 684 841 94231.39 56 24.2 34.3 53.5 73.0 99.1 148 172 225 252 304 340 385 431 566 634 765 857

1430

5.06 280 112 159 183 329 332 588 600 762 853 873 978 1466 1508 1538 1540 2523 28265.60 255 112 149 183 266 322 514 599 678 759 874 980 1242 1334 1509 1541 2260 25316.20 230 105 159 183 297 332 588 600 762 853 873 978 1466 1534 1538 1540 2064 23126.86 210 99.4 148 183 275 332 428 537 579 649 824 924 1074 1203 1509 1541 1957 2192

7.59 190 93.0 138 183 263 332 515 600 699 783 873 978 1373 1480 1538 1540 1827 20468.40 170 81.9 115 161 241 318 485 595 727 814 873 979 1287 1441 1509 1541 2160 24219.30 155 66.0 115 153 222 292 411 529 663 743 788 883 1141 1278 1375 1540 1821 2039

10.29 140 65.6 94.4 134 204 270 368 480 595 666 789 885 1048 1173 1509 1541 1835 2055

11.39 125 63.0 90.8 126 189 248 355 405 492 551 647 725 902 1010 1133 1269 1548 1734 1768 1980 2471 276712.61 115 55.5 89.8 111 174 228 334 368 504 564 663 743 922 1033 1181 1323 1413 1582 2020 2262 1894 212113.95 100 45.6 82.0 107 159 187 290 367 459 514 543 608 802 898 957 1072 1288 1442 1700 1904 2141 2398 2768 310015.44 90 45.3 64.6 93.5 134 190 260 329 422 473 558 625 748 837 852 954 1198 1342


17.09 84 41.5 64.6 87.5 134 155 247 287 349 391 456 511 646 724 813 911 1079 120818.9120.9323.16

756860

37.931.731.5

54.049.042.6

79.173.962.1

113110

92.2

156131131

232203184

287255242

347316298

389354334

465385397

521431445

638554516

714620578

723682714

810764799

1135961967

127110761082

25.63 56 25.8 38.3 60.3 77.1 107 165 203 246 275 325 364 457 512 576 645 819 91728.36 50 22.4 30.7 49.5 67.3 94.1 151 185 219 245 291 326 398 446 512 573 705 79031.39 45 20.1 28.5 44.4 60.7 82.4 123 143 188 210 254 284 321 360 473 530 641 718

1170

5.06 230 97.6 130 150 275 272 511 521 662 741 759 850 1274 1311 1336 1338 2107 2360 2555 2862 3328 37275.60 210 97.5 124 150 221 267 427 521 564 632 760 851 1035 1159 1313 1339 1886 2112 2814 2921 2974 32126.20 190 87.0 130 150 258 272 511 521 662 741 759 850 1274 1332 1336 1338 1722 1929 2446 2739 3308 37056.86 170 82.3 127 150 239 272 355 447 482 540 687 769 895 1002 1313 1339 1632 1828 2221 2488 2798 2854

7.59 155 76.9 116 150 227 272 427 521 581 651 759 850 1172 1249 1295 1298 1522 1705 2091 2342 2941 32948.40 140 67.8 94.8 133 210 268 403 494 604 676 727 814 1099 1231 1313 1339 1878 2103 2674 2725 2500 25509.30 125 55.2 96.3 126 189 245 345 439 551 617 655 734 956 1071 1195 1338 1582 1772 2050 2296 2561 286810.29 115 54.9 78.1 111 159 226 310 403 500 561 666 746 884 990 1296 1322 1595 1786 2032 2130 2257 2302

11.39 100 52.0 74.9 104 160 207 294 340 414 464 546 611 761 852 956 1071 1346 1507 1471 1647 2096 234812.61 90 45.8 74.9 91.6 135 191 277 309 417 467 558 625 763 858 997 1116 1193 1336 1924 1966 1829 184413.95 84 38.0 68.4 88.1 133 156 242 304 380 426 456 511 665 745 807 904 1087 1217 1477 1654 1861 2084 2405 269415.44 75 37.7 53.2 77.3 112 159 217 286 355 397 469 525 621 695 717 803 1010 1131


17.09 68 34.2 53.2 72.2 112 129 204 240 292 327 383 429 543 608 684 766 919 102918.9120.9323.16

605650

31.326.326.1

44.540.835.4

65.361.551.2

94.090.476.7

129109109

192168154

237211202

288262249

322293279

395322333

442361373

529458427

592513478

607572598

680641670

973835813

1090935910

25.63 45 21.4 31.8 50.2 64.1 89.0 136 170 205 230 271 304 382 428 482 540 704 78828.36 40 18.5 25.5 41.1 56.0 78.3 126 154 182 204 244 273 333 373 428 479 591 66231.39 37 16.6 23.6 36.9 50.4 68.5 102 119 157 176 213 238 269 301 396 443 537 601

� Mechanical hp ratings shown in bold face type exceed the drive thermal ratings. Check required hp (without service factor) against thermal hp ratings on Page 26, thenrefer to Page 28 tor Falk™ cooling fans. For ratings at speeds higher than 1750 rpm, Contact Factory, below 580 rpm, reduce hp rating proportionately.

Selection Example - HORSEPOWER METHODA draw bench operating 10 hours per day with speeds varyingfrom 130 to 185 rpm is powered by a 125 hp, 1170/1750 rpmvariable speed, constant hp, electric motor. Select a gear drive forthe coupling connected application.

1. Service Factor is 1.25 for a draw bench drive operating 10 hours per

day . . . Page 7, Table 3.

2. Equivalent hp = 1.25 X 125 = 156 . . . Page 6, How to Select.

3. Required ratio = 1170 ÷ 130 = 9.0 . . . Closest standard

AGMA ratio is 9.30 . . . Double Reduction Selection Table above.

4. Drive size is 2080YB2 . . . Double Reduction Selection Table

above.(Cont’d. on next page)

Type YB2/Torque RatingsRatios 5.06 through 31.39 Double Reduction 1750 through 1170 rpm


HighSpeedShaftrpm

NominalRatio�4%

Approx.L.S.

Shaftrpm

DRIVE SIZE �

2050 2060 2070 2080 2090 2100 2110 2120 2125 2130 2135 2140 2145 2150 2155 2160 2165 2170 2175 2180 2185 2190 2195

1750

5.06 350 23.2 36.1 41.7 69.3 75.4 125 132 162 181 185 207 311 3485.60 310 25.8 36.1 46.1 65.6 79.8 125 143 166 186 202 226 306 3436.20 280 28.5 41.2 50.6 75.2 94.9 152 157 195 218 229 256 382 4286.86 255 29.5 42.7 54.9 76.6 99.7 129 163 172 193 250 280 321 360

7.59 230 30.6 44.1 60.7 81.3 115 173 195 233 261 274 307 444 4978.40 210 29.4 40.7 59.0 82.4 114 173 213 268 300 304 340 453 5079.30 190 27.1 45.2 61.3 84.1 120 164 220 262 293 317 355 462 517

10.29 170 28.3 41.3 60.4 84.7 117 160 213 255 286 339 379 456 511

11.39 155 31.4 44.4 62.4 86.5 123 179 205 247 277 319 357 445 498 855 95812.61 140 30.1 47.3 61.1 86.6 120 178 197 277 310 352 394 482 539 617 690 1054 118113.95 125 28.3 47.4 62.9 91.4 113 174 227 270 302 329 369 491 550 579 649 994 111315.44 115 29.6 43.6 61.6 89.2 123 169 225 271 304 361 404 485 543 558 625 799 894


17.09 100 31.0 46.7 63.6 93.3 115 183 216 262 293 339 380 472 529 596 668 745 83418.91 90 30.7 42.7 64.1 90.8 124 183 234 284 318 372 416 515 578 575 644 889 99520.93 84 29.4 44.3 64.1 97.9 118 182 232 278 311 347 389 504 565 614 688 831 93123.16 75 30.7 41.1 63.1 93.2 129 177 236 285 320 381 427 504 565 675 755 931 1042

25.63 68 28.4 41.0 65.4 87.3 120 184 226 275 308 357 400 498 558 631 707 871 97528.36 60 27.3 36.7 60.6 83.6 117 181 217 263 295 346 387 466 522 607 680 875 98031.39 56 26.7 37.9 59.4 83.2 113 169 196 245 274 325 364 439 492 649 727 848 950

1430

5.06 280 24.6 36.0 41.7 73.6 75.2 132 140 171 192 196 220 329 339 340 341 562 6295.60 255 27.5 36.6 46.0 66.5 81.3 127 152 170 190 214 242 313 335 379 387 579 6496.20 230 28.8 43.6 50.6 79.9 94.8 161 167 206 231 243 272 406 425 426 427 581 6516.86 210 30.0 45.5 54.9 81.4 99.5 131 166 176 197 254 285 328 367 448 458 599 671

7.59 190 31.1 45.4 61.5 86.4 115 176 207 238 266 291 326 471 508 509 510 612 6858.40 170 29.7 41.5 60.5 89.6 117 176 224 273 305 322 361 483 540 563 574 810 9089.30 155 27.7 46.5 62.4 89.6 123 170 224 266 298 322 361 479 537 566 634 754 844

10.29 140 28.9 41.8 61.1 93.2 120 164 219 264 295 350 393 472 528 665 679 834 934

11.39 125 31.8 44.9 62.8 92.2 126 181 211 254 285 329 368 459 514 579 649 779 872 871 975 1201 134512.61 115 30.4 49.6 61.9 96.2 123 181 202 281 314 362 405 510 571 636 712 800 896 1116 1250 1047 117213.95 100 28.9 48.5 63.9 95.6 116 179 230 274 307 339 380 498 558 597 669 777 870 1055 1182 1315 1473 1687 188915.44 90 30.2 43.9 62.4 91.2 126 173 223 278 312 371 416 496 555 576 645 825 924


17.09 84 31.2 47.0 64.3 97.4 118 186 222 269 301 348 390 486 544 614 688 791 88618.9120.9323.16

756860

30.929.931.2

43.145.141.8

64.765.363.7

93.099.894.7

125121131

185184181

236236241

288280293

322314328

377356390

422399437

522512512

584573573

592632692

663708774

943883989

10569891107

25.63 56 28.8 41.7 66.6 89.0 123 186 231 281 315 365 409 512 573 647 725 926 103728.36 50 27.8 37.4 61.7 85.0 119 184 222 270 302 354 396 478 535 622 697 898 100631.39 45 27.2 38.5 60.3 84.7 115 172 200 250 280 333 373 449 503 664 744 870 974

1170

5.06 230 26.2 36.0 41.7 75.2 75.3 141 149 182 204 208 233 350 360 361 362 573 642 699 783 902 10105.60 210 29.2 37.2 46.1 67.6 82.4 129 162 172 193 337 255 318 356 402 410 591 662 886 920 923 9976.20 190 29.2 43.5 50.7 84.8 94.9 171 177 219 245 258 289 431 451 452 453 593 664 840 941 1121 12556.86 170 30.3 47.7 55.0 86.5 99.6 133 169 179 200 259 290 333 373 475 485 611 684 849 951 1081 1103

7.59 155 31.4 46.6 61.6 91.1 115 178 220 241 270 310 347 492 524 525 526 622 697 856 959 1204 13498.40 140 30.1 41.8 61.1 95.5 120 179 227 276 309 327 366 502 562 595 607 862 963 1230 1253 1667 11909.30 125 28.3 47.5 62.8 93.2 126 174 227 271 303 328 367 491 550 601 673 801 897 1059 1186 1325 148410.29 115 29.6 42.3 61.9 88.8 123 169 225 272 305 361 404 488 546 698 712 886 962 1113 1167 1247 1272

11.39 100 32.1 45.2 63.4 95.4 129 183 217 263 294 338 379 473 530 597 669 827 926 886 992 1246 139512.61 90 30.7 50.5 62.4 91.2 126 184 207 284 318 371 416 517 581 657 735 825 924 1301 1329 1236 124613.95 84 29.5 49.4 64.3 97.8 118 182 233 278 311 348 390 504 565 616 690 801 897 1121 1255 1396 1564 1791 200615.44 75 30.7 44.2 63.0 93.2 129 177 237 285 321 382 428 505 566 592 663 850 952


17.09 68 31.4 47.3 64.8 99.5 120 187 227 275 308 357 400 499 559 631 707 824 92318.9120.9323.16

605650

31.230.431.6

43.445.942.5

65.366.564.2

94.6100

96.3

126123133

187186185

239238246

291284298

326318334

390365399

437409447

532517517

596579579

607648711

680726796

989938

1024

110810501147

25.63 45 29.2 42.4 67.7 90.4 125 187 237 288 322 373 418 522 585 663 742 972 108928.36 40 28.1 37.9 62.6 86.5 121 188 226 274 307 362 405 488 547 637 713 920 103031.39 37 27.4 39.0 61.3 86.0 117 174 203 256 287 341 382 459 514 679 760 889 996

� Torque ratings shown in bold face type exceed the drive thermal ratings. Convert required torque (without service factor) to hp and refer to Page 26 for thermal hp ratingsand Page 28 for Falk™ cooling fans. For ratings at speeds higher than 1750 rpm, contact Factory; below 580 rpm, use torques for 580 rpm.


(Cont’d. from preceding page)

In the 1170 high speed shaft section opposite 9.30 ratio and 125rpm, trace right to 189 (nearest hp exceeding equivalent hp) andthen read drive size 2080YB2 at top of column. When making aconstant hp selection, always use the combination of horsepowerand slowest speed that will give the greatest torque at the lowspeed shaft of the drive.

5. The 134 thermal hp at 1170 rpm is satisfactory since it exceeds the

actual 125 hp load. The thermal hp of 70.0 is insufficient at 1750

rpm for the 125 constant hp motor. To improve the thermalrating at 1750 rpm, use a fan as instructed on Page 28.Multiply the 70.0 thermal hp rating by 2. The resulting 140thermal hp will be satisfactory.

6. There is no overhung load since the drive is coupling connected.

Contact Factory for coupling Selection Guides for couplingselections.

Type YB2/Horsepower RatingsRatios 5.06 through 31.39 Double Reduction 870 through 580 rpm


HighSpeedShaftrpm

NominalRatio�4%

Approx.L.S.

Shaftrpm

DRIVE SIZE �

2050 2060 2070 2080 2090 2100 2110 2120 2125 2130 2135 2140 2145 2150 2155 2160 2165 2170 2175 2180 2185 2190 2195

870

5.06 175 79.3 96.8 111 204 202 415 423 538 602 617 691 1028 1062 1084 1087 1611 1804 1958 2193 2475 2772 2716 30425.60 155 74.9 93.7 111 168 202 325 423 429 481 617 692 789 884 1066 1088 1441 1614 2016 2193 2183 2611 3122 34976.20 140 65.7 96.8 111 204 202 399 423 538 602 617 691 1028 1062 1074 1087 1315 1473 1869 2093 2475 2772 2716 30426.86 130 62.2 97.3 111 194 202 270 339 366 410 522 585 681 763 1066 1088 1246 1395 1696 1899 2274 2319 2882 3228

7.59 115 58.1 88.8 111 175 202 324 404 441 494 606 679 892 951 988 989 1161 1300 1596 1787 2246 2516 2711 30368.40 105 51.2 71.6 101 147 202 305 374 458 513 552 618 836 936 1066 1088 1495 1674 2108 2131 2031 2072 3122 34979.30 95 42.2 73.8 95.4 146 189 267 333 418 468 497 557 727 814 909 1018 1286 1440 1620 1814 2081 2331 2669 2989

10.29 85 42.0 58.9 83.7 122 174 239 311 388 434 516 578 678 759 1007 1028 1268 1420 1522 1662 1834 1871 2526 2829

11.39 77 39.2 55.7 78.8 123 159 222 262 320 358 421 472 589 660 742 831 1093 1224 1119 1253 1596 1787 2101 235312.61 70 34.5 56.6 69.1 103 147 209 238 316 354 431 483 580 650 772 865 926 1037 1525 1537 1338 1499 1906 213513.95 62 28.9 52.2 66.4 101 120 183 230 288 322 352 394 504 565 624 699 843 944 1166 1306 1512 1693 1954 218915.44 55 28.7 39.8 58.2 85.3 122 167 219 273 306 361 404 470 526 554 621 781 875


17.09 50 25.6 39.8 54.4 84.2 98.9 154 184 224 251 295 330 418 468 528 591 711 79618.91 45 23.5 33.5 49.2 71.7 96.6 145 179 217 243 304 340 399 447 468 524 727 81420.9323.16

4238

20.019.8

31.026.6

46.838.5

68.058.4

83.283.4

127117

159154

197191

221214

247255

277286

346322

388361

440460

493515

651598

729670

25.63 34 16.3 24.1 38.1 48.7 67.8 103 129 157 176 208 233 293 328 371 415 541 60628.36 31 14.0 19.3 31.2 42.5 59.6 95.8 118 139 156 187 209 255 286 329 368 454 50831.39 28 12.6 17.9 28.0 38.3 52.1 77.9 91.1 120 134 163 182 205 230 303 339 412 461

720

5.06 140 65.7 80.1 92.0 169 167 348 355 453 507 550 582 851 880 907 918 1355 1518 1621 1815 2048 2294 2379 26655.60 130 62.6 78.4 92.0 140 167 272 334 361 404 537 601 663 742 900 918 1212 1357 1621 1815 2042 2287 2717 30436.20 115 54.9 80.1 92.0 169 167 334 355 453 507 550 582 851 880 900 918 1105 1238 1571 1760 2048 2294 2379 26656.86 105 52.0 80.1 92.0 168 167 226 284 307 344 438 490 571 640 898 916 1046 1172 1426 1597 1991 2031 2425 27167.59 95 48.5 74.9 92.0 148 167 271 338 370 414 509 570 748 790 828 830 975 1092 1341 1502 1888 2115 2280 25548.40 85 42.7 59.8 84.0 124 167 255 313 384 430 463 518 701 785 900 918 1273 1426 1872 1891 1778 1815 2711 30369.30 77 35.5 62.1 79.7 123 159 224 279 350 392 417 467 609 682 763 854 1105 1238 1379 1545 1810 2027 2338 2619

10.29 70 35.3 49.2 69.9 103 147 202 263 329 368 438 490 568 636 856 873 1071 1200 1263 1415 1607 1639 2154 241311.39 62 32.7 46.1 65.7 103 134 186 221 271 303 357 400 499 559 629 705 935 1047 938 1051 1339 1500 1790 200512.61 55 28.8 47.2 57.7 86.8 124 175 201 264 296 364 408 486 544 654 733 786 880 1293 1306 1171 1312 1623 181813.95 50 24.3 43.8 55.4 84.2 101 153 192 241 270 297 333 421 472 529 592 715 801 989 1108 1284 1438 1713 191815.44 45 24.1 33.1 48.5 71.7 102 141 185 230 258 304 341 393 440 469 525 662 741


17.09 42 21.2 33.1 45.3 70.2 83.2 128 155 189 212 248 278 354 396 446 500 602 67418.9120.9323.16

383431

19.616.716.5

27.926.022.2

41.039.332.1

60.256.749.0

80.369.870.0

12110698.4

149133130

181165161

203185180

256208215

287233241

334289270

374324302

396371388

443416435

608550500

681616560

25.63 28 13.6 20.2 31.9 40.8 56.8 85.6 109 132 148 175 196 246 276 313 350 456 51128.36 25 11.7 16.2 26.1 35.6 49.9 79.9 98.7 117 131 156 175 215 241 277 310 382 42831.39 22 10.5 15.0 23.4 32.1 43.6 65.4 76.4 101 113 137 153 173 194 255 286 347 389

580

5.06 115 52.9 64.6 74.1 136 135 282 287 364 408 444 469 686 709 730 739 1112 1245 1305 1462 1650 1848 2045 22905.60 105 50.9 63.8 74.1 114 135 222 273 295 330 440 492 542 607 724 739 993 1112 1305 1462 1650 1848 2189 24516.20 95 44.7 64.6 74.1 136 135 273 287 364 408 444 469 686 709 724 739 905 1014 1288 1442 1650 1848 2045 22906.86 85 42.3 64.6 74.1 139 135 184 232 251 281 358 401 467 523 724 739 857 960 1168 1308 1559 1746 1988 22277.59 77 39.5 61.6 74.1 122 135 221 274 302 338 415 465 612 652 676 679 798 894 1098 1230 1547 1733 1870 20948.40 70 34.7 48.7 68.4 102 135 208 256 313 351 378 423 572 641 724 739 1049 1175 1410 1462 1532 1561 2189 24519.30 62 29.1 51.0 64.8 100 131 182 227 286 320 340 381 497 557 622 697 918 1028 1146 1283 1485 1663 1977 2214

10.29 55 28.9 39.9 56.8 84.7 121 166 217 271 303 362 405 463 519 709 723 876 981 1048 1174 1381 1409 1792 200711.39 50 26.5 37.1 53.4 83.6 109 151 182 223 250 295 330 413 462 521 583 774 867 767 859 1095 1226 1488 166612.61 45 23.3 38.3 46.8 71.2 102 142 166 215 241 301 337 396 444 541 606 650 728 1070 1080 1007 1128 1347 150913.95 42 19.9 35.8 45.0 68.4 82.6 124 156 196 220 245 274 344 385 437 489 591 662 819 917 1049 1175 1434 160615.44 38 19.6 26.7 39.4 58.7 82.8 115 152 189 212 251 281 321 359 387 433 546 612


17.09 34 17.1 26.7 36.8 57.0 68.1 104 127 155 174 204 229 291 326 368 412 496 55618.9120.9323.16

312825

15.913.613.3

22.621.218.0

33.232.126.0

49.246.040.0

65.057.157.2

98.185.779.9

121108106

147134132

165150148

211171176

236192197

271236219

304264245

326305319

365342357

496453407

555507456

25.63 22 11.1 16.5 26.0 33.3 46.4 69.5 89.0 108 121 143 160 203 227 256 287 375 42028.36 21 9.57 13.2 21.3 29.1 40.8 64.8 80.8 95.5 107 129 144 176 197 227 254 314 35231.39 18 8.57 12.2 19.1 26.1 35.6 53.4 62.5 82.2 92.1 111 124 142 159 209 234 285 319

� Mechanical hp ratings shown in bold face type exceed the drive thermal ratings. Check required hp (without service factor) against thermal hp ratings on Page 26 and thenrefer to Page 28 for Falk™ cooling fans. For ratings at speeds higher than 1750 rpm, contact Factory; below 580 rpm, reduce hp rating proportionately.

Type YB2/Torque RatingsRatios 5.06 through 31.39 Double Reduction 870 through 580 rpm


HighSpeedShaftrpm

NominalRatio�4%

Approx.L.S.

Shaftrpm

DRIVE SIZE �

2050 2060 2070 2080 2090 2100 2110 2120 2125 2130 2135 2140 2145 2150 2155 2160 2165 2170 2175 2180 2185 2190 2195

870

5.06 175 28.7 36.0 41.5 75.0 75.2 154 162 199 223 228 255 380 393 394 395 589 660 721 807 902 1010 1016 11385.60 155 30.2 37.8 45.9 69.1 83.8 132 166 176 197 249 279 326 365 439 448 608 681 852 927 911 1089 1320 14796.20 140 29.6 43.6 50.5 90.2 94.8 180 194 239 268 282 316 468 484 489 495 609 682 863 967 1127 1262 1223 13706.86 130 30.8 49.1 54.7 94.4 99.5 136 172 182 204 265 297 341 382 521 531 627 702 871 976 1184 1207 1488 1667

7.59 115 31.9 48.0 61.3 94.5 115 182 229 246 275 332 372 504 537 538 539 638 715 879 984 1238 1386 1502 16828.40 105 30.5 42.5 62.4 89.9 122 182 232 282 316 334 374 516 578 652 665 921 1033 1302 1316 1267 1292 1947 21819.30 95 29.1 49.0 64.0 96.9 131 181 231 276 309 334 374 502 562 615 689 875 980 1125 1260 1448 1622 1842 2063

10.29 85 30.4 42.9 62.7 91.6 127 175 233 282 316 376 421 502 562 731 746 948 1061 1123 1226 1361 1388 1865 2089

11.3912.6113.9515.44

77706255

32.531.130.131.4

45.251.450.744.5

64.663.365.163.8

98.793.599.895.5

133130122133

186186185183

225215237244

272289282296

305324316332

352387361395

394433404442

493528515514

552591577576

623684640616

698766717690

903862836884

1011965936990

90613861190

101513971333

127512161526

142813631709

177117171957

198419232192

17.0918.9120.9323.16

50454238

31.631.531.132.3

47.644.046.942.9

65.766.168.064.9

10197.0101

98.6

124127126137

190190189189

234242241253

284296288308

318331323345

370404377412

414452422461

516540526525

578605589588

655629671734

734705751822

857994983

1005

960111211011126 Refer to YB3 Tables on

Page 15 for Selections25.6328.3631.39

343128

29.928.628.0

43.238.639.8

69.163.962.5

92.488.387.8

128124119

191192179

242233209

296282262

331316293

384372350

430417392

538504471

603564528

685657698

767736782

1005949918

112610631028

720

5.06 140 28.7 36.0 41.6 75.1 75.2 156 165 203 227 246 260 380 393 398 403 599 671 721 807 902 1010 1076 12055.60 130 30.5 38.3 46.0 69.6 83.7 133 168 179 200 262 294 331 371 446 455 618 692 829 928 1029 1153 1392 15976.20 115 29.9 43.6 50.5 90.3 94.7 182 197 244 273 305 322 468 484 495 505 618 692 877 982 1127 1262 1296 14516.86 105 31.1 48.9 54.8 98.7 99.4 138 174 185 207 269 301 346 388 529 539 637 713 886 992 1254 1280 1511 1692

7.59 95 32.2 48.9 61.4 96.6 115 184 232 249 279 338 378 510 544 545 546 648 726 893 1000 1256 1407 1526 17098.40 85 30.8 42.8 62.7 91.6 122 184 234 286 320 338 379 521 584 667 680 947 1061 1401 1415 1346 1374 2045 22919.30 77 29.6 49.8 64.6 98.6 133 183 234 279 312 338 379 508 569 623 698 909 1018 1157 1296 1521 1704 1951 2185

10.29 70 30.9 43.3 63.3 93.5 130 179 239 289 324 386 432 509 570 749 764 967 1083 1127 1262 1442 1471 1922 2153

11.3912.6113.95

625550

32.831.330.6

45.251.851.4

65.163.965.7

99.895.3101

135133124

189188187

229219239

278292286

311327320

361395369

404442413

504534520

565598582

639701655

716785734

933884857

1045990960

91814211220

102814361366

129312851566

144814401754

182317662072

204219782321

15.44 45 31.9 44.7 64.3 97.0 134 187 249 302 338 403 451 520 582 629 705 905 1014


17.09 42 31.6 47.8 66.1 101 126 191 238 289 324 376 421 528 591 670 750 877 98218.9120.9323.16

383431

31.831.332.5

44.247.543.3

66.669.065.4

98.4102100

128128139

192191192

244244258

298291313

334326351

412383420

461429470

546530531

612594595

643684749

720766839

100410041015

112411251137

25.63 28 30.2 43.7 69.9 93.5 130 192 247 301 337 391 438 547 613 697 781 1024 114728.36 25 28.9 39.2 64.6 89.4 125 193 235 286 320 377 422 513 574 669 749 966 108231.39 22 28.2 40.3 63.1 89.0 121 181 212 267 299 356 399 480 538 712 797 936 1048

580

5.06 115 28.7 36.1 41.6 75.0 75.4 156 165 203 227 246 260 380 393 398 403 610 683 721 807 902 1010 1147 12855.60 105 30.8 38.7 46.0 70.3 84.0 135 171 181 203 267 298 336 376 447 456 628 703 829 928 1029 1153 1387 15536.20 95 30.2 43.7 50.5 90.2 95.0 185 197 244 273 305 322 468 484 495 505 629 704 892 999 1127 1262 1381 15476.86 85 31.4 48.9 54.8 101 99.7 139 176 188 210 272 305 351 393 530 541 647 725 900 1008 1219 1365 1538 1722

7.59 77 32.5 49.9 61.4 98.8 115 186 233 253 283 341 382 518 552 553 555 659 738 907 1016 1278 1431 1554 17408.40 70 31.0 43.3 63.4 93.5 122 186 238 289 324 343 384 529 592 664 678 972 1089 1310 1358 1441 1468 2050 22949.30 62 30.1 50.8 65.2 99.5 136 185 237 283 317 343 384 515 577 631 707 938 1050 1193 1336 1550 1736 2047 2293

10.29 55 31.4 43.6 63.9 95.4 133 183 244 296 331 396 443 515 577 772 787 982 1100 1161 1300 1537 1568 1985 2223

11.39 50 33.0 45.2 65.7 101 137 190 234 285 319 369 413 517 579 656 735 960 1075 931 1043 1312 1469 1881 210712.61 45 31.5 52.1 64.4 97.0 135 190 225 296 331 404 453 541 606 719 805 907 1016 1462 1080 1374 1538 1820 203813.95 42 31.1 52.2 66.2 101 126 188 241 289 324 377 422 526 589 672 753 879 984 1254 1404 1588 1779 2154 241315.44 38 32.2 44.7 64.8 98.5 135 189 254 308 345 413 462 527 590 645 722 928 1039


17.09 34 31.7 47.9 66.6 102 128 193 242 295 330 385 431 539 604 686 768 898 100618.9120.9323.16

312825

32.031.732.5

44.548.143.5

66.970.065.7

99.8103101

129130141

193192193

246246261

301293320

337328358

421392426

471439477

551537535

617601599

657698763

736782854

101610261026

113811491149

25.63 22 30.6 44.3 70.8 94.8 132 193 250 305 342 396 443 559 626 710 795 1046 117128.36 21 29.3 39.6 65.4 90.7 127 195 239 290 325 385 431 521 583 680 762 987 110531.39 18 28.6 40.6 64.0 89.8 122 184 215 271 303 358 401 488 547 723 810 953 1067

� Torque ratings shown in bold face type exceed the drive thermal ratings. Convert required torque (without service factor) to hp and refer to Page 26 for thermal hp ratingsand Page 28 for Falk™ cooling fans. For ratings at speeds higher than 1750 rpm, contact Factory; below 580 rpm, use torques for 580 rpm.


Type YB3/Horsepower RatingsRatios 15.44 through 31.39 Triple Reduction 1750 through 580 rpm


HighSpeedShaftrpm

NominalRatio�4%

Approx.L.S. Shaft

rpm

DRIVE SIZE �

2170 2175 2180 2185 2190 2195

1750

15.44 115 1530 171417.09 100 1530 171418.91 90 1530 171420.93 84 1447 1621

23.16 75 1444 161725.63 68 1208 135328.36 60 1076 120531.39 56 1024 1147

1430

15.44 90 1259 1410 1924 2155 2452 250117.09 84 1259 1410 1924 2155 2208 225318.91 75 1259 1410 1857 2080 2452 250120.93 68 1206 1351 1654 1853 2063 2105

23.16 60 1206 1351 1527 1710 2087 233725.63 56 1015 1137 1337 1497 1734 194228.36 50 904 1012 1113 1247 1571 176031.39 45 852 954 1145 1282 1554 1741

1170

15.44 75 1030 1154 1606 1799 2130 217317.09 68 1030 1154 1606 1799 1919 195818.91 60 1030 1154 1542 1727 1940 217320.93 56 1005 1126 1373 1538 1633 1829

23.16 50 1005 1126 1267 1419 1754 196525.63 45 853 955 1123 1258 1459 163428.36 40 758 849 935 1047 1321 148031.39 37 709 794 948 1062 1288 1443

870

15.44 55 766 858 1229 1376 1577 176617.09 50 766 858 1229 1376 1421 159118.91 45 766 858 1171 1311 1577 176620.93 42 766 858 1040 1165 1327 1486

23.16 38 766 858 960 1075 1473 164925.63 34 656 735 851 953 1126 126128,36 31 583 653 720 806 1020 114231.39 28 539 604 717 803 974 1091

720

15.44 45 634 710 1033 1157 1347 150817.09 42 634 710 1033 1157 1245 139418.91 38 634 710 979 1097 1347 150820.93 34 634 710 871 975 1163 1302

23.16 31 634 710 804 900 1113 124725.63 28 554 621 712 797 953 106728.36 25 492 551 608 681 862 96531.39 22 453 507 599 671 814 912

580

15.44 38 511 572 847 949 1111 124417.09 34 511 572 847 949 1070 119818.91 31 511 572 799 895 1107 123920.93 28 511 572 710 795 990 1109

23.16 25 511 572 654 733 908 101725.63 22 456 511 579 649 786 88028.36 21 404 453 500 560 710 79531.39 18 370 414 488 546 663 742


Selection Example — TORQUE METHODA main hoist requires 34,200 pound-inches torque at its inputshaft which operates at 13 rpm. The hoist is in service 10 hoursper day and is driven by a coupling connected 7½ hp, 1170 rpmelectric motor. Select a gear drive for the application.

1. Service Factor is 1.00 for a main hoist operating 10 hours perday . . . Page 7, Table 3 under Cranes, Main Hoist.

2. Equivalent torque = 34,200 x 1.00 = 34,200 lb-in.... Page 6.

3. Required ratio = 1170 ÷13 = 90... Closest standard AGMAratio is 86.50 . . . Page 17, Triple Reduction Selection Table.

(Cont’d. on next page)

Type YB3/Torque RatingsRatios 15.44 through 31.39 Triple Reduction 1750 through 580 rpm


HighSpeedShaftrpm

NominalRatio�4%

Approx.L.S. Shaft

rpm

DRIVE SIZE �

2170 2175 2180 2185 2190 2195

1750

15.44 115 846 94717.09 100 948 106218.91 90 1008 112920.93 84 1106 1239

23.16 75 1173 131425.63 68 1108 124128.36 60 1068 119631.39 56 1178 1319

1430

15.44 90 851 953 1304 1460 1650 168317.09 84 54 1069 1447 1621 1642 167618.91 75 1014 1136 1489 1668 1950 198920.93 68 1129 1264 1538 1722 1892 1930

23.16 60 1200 1344 1513 1694 2048 229325.63 56 1139 1276 1488 1667 1942 217528.36 50 1098 1230 1398 1566 1880 210631.39 45 1198 1342 1579 1769 2176 2437

1170

15.44 75 851 953 1329 1489 1752 178717.09 68 954 1069 1477 1654 1744 178018.91 60 1015 1137 1512 1693 1886 211320.93 56 1150 1288 1559 1746 1830 2050

23.16 50 1222 1369 1534 1718 2101 235425.63 45 1170 1310 1529 1713 1997 223728.36 40 1126 1261 1435 1607 1932 216431.39 37 1219 1365 1599 1791 2204 2468

870

15.44 55 851 953 1368 1532 1743 195217.09 50 954 1069 1519 1701 1737 194518.91 45 1015 1137 1543 1728 2061 230820.93 42 1179 1320 1588 1779 2000 2240

23.16 38 1253 1403 1563 1750 2373 265725.63 34 1211 1356 1558 1745 2072 232128.36 31 1164 1304 1485 1663 2005 224631.39 28 1247 1397 1626 1821 2241 2510

720

15.44 45 851 953 1390 1557 1798 201317.09 42 954 1069 1544 1729 1839 206018.91 38 1014 1136 1560 1747 2127 238120.93 34 1178 1319 1606 1799 2117 2371

23.16 31 1252 1402 1581 1771 2169 242925.63 28 1236 1384 1574 1763 2119 237328.36 25 1182 1330 1516 1698 2047 229331.39 22 1265 1417 1642 1839 2263 2535

580

15.44 38 851 953 1415 1585 1842 204117.09 34 954 1069 1571 1760 1962 219718.91 31 1015 1137 1580 1770 2173 243220.93 28 1179 1320 1626 1821 2238 2507

23.16 25 1253 1403 1598 1790 2196 246025.63 22 1263 1414 1591 1782 2170 243028.36 21 1212 1357 1548 1734 2094 234531.39 18 1282 1436 1658 1857 2286 2560

� Torque ratings shown in bold face type exceed the drive thermal ratings. Convert required torque (without service factor) to hp and check against thermal hp ratings onPage 27 and then refer to Page 28 for Falk™ cooling fans. For ratings at speeds higher than I 750 rpm, contact Factory; below 580 rpm, use torques for 580 rpm

(POUND-INCHES AT LOW SPEED SHAFT. ..MULTIPLY VALUES LISTED BELOW BY 1000)

4. Drive size is 2050YB3 - . . Triple Reduction Selection Tableabove. In the 1170 high speed shaft section opposite 86.50ratio and 13.5 rpm, trace right to 34.8 (x 1000), the nearesttorque exceeding equivalent torque, and then read drive size

2050YB3 at top of the column

5. The thermal capacity is satisfactory since the torque rating is notshown in bold face type.

6. There is no overhung load since the drive is couplingconnected. Refer to Factory coupling selection guides for

coupling selections.

Cont’d. from preceding page)

Type YB3/Horsepower RatingsRatios 34.74 through 194.6 Triple Reduction 1750 through 1170 rpm


HighSpeedShaftrpm

NominalRatio�4%

Approx.L.S.

Shaftrpm

DRIVE SIZE �

2050 2060 2070 2080 2090 2100 2110 2120 2125 2130 2135 2140 2145 2150 2155 2160 2165 2170 2175 2180 2185 2190 2195

1750

34.74 50 25.4 34.3 51.6 78.6 111 159 198 216 224 345 386 407 410 498 558 676 690 841 942 1153 1291 1449 162338.44 45 22.8 30.9 53.4 72.2 92.9 136 181 193 205 290 325 349 391 451 505 555 622 789 884 1042 1167 1305 146242.54 40 21.4 29.3 43.0 63.1 81.7 127 163 183 205 259 290 335 375 510 571 674 680 839 940 1041 1166 1395 156247.08 37 19.5 28.0 43.8 61.4 75.3 110 147 183 205 239 268 321 359 411 460 555 622 701 785 932 1044 1180 1322

52.11 34 17.2 24.4 35.0 54.7 75.0 103 137 163 183 211 236 277 310 431 483 556 568 716 802 860 963 1154 129257.66 30 15.6 24.1 36.7 48.9 63.8 90.5 123 148 166 198 222 269 301 346 388 461 516 584 654 713 799 1002 112263.82 27 14.4 19.4 29.1 47.1 56.0 84.4 115 133 149 173 194 233 261 355 398 420 470 571 640 708 793 963 107970.62 25 13.0 18.7 30.2 41.6 51.5 78.7 102 125 140 167 187 227 254 286 320 380 426 491 550 621 695 783 877

78.16 22 11.5 16.5 23.8 37.9 51.6 73.4 98.2 110 123 145 162 193 216 299 335 355 398 454 508 590 661 769 86186.50 20 10.5 16.4 25.2 34.5 44.4 63.6 86.7 104 116 133 149 189 212 240 269 322 361 422 473 533 597 716 80295.73 18 9.62 12.7 19.8 30.5 39.0 58.5 81.5 92.9 104 114 128 160 179 248 278 285 290 295 308 486 521 532 543105.9 16.5 8.51 12.7 18.5 28.2 35.8 51.2 71.4 87.7 98.2 112 125 154 173 197 221 265 297 369 413 438 491 576 645

117.2 15 7.87 11.0 16.1 25.4 31.4 47.8 66.7 77.9 87.2 101 113 131 147 207 232 247 277 294 329 388 434 538 603129.7 13.5 7.26 11.0 17.3 22.7 30.5 43.5 57.9 69.6 78.0 92.0 103 129 145 168 188 226 253 289 324 356 399 497 557143.6 12 6.60 8.68 13.4 19.8 26.8 38.5 48.1 64.7 72.5 82.7 92.6 108 121 161 180 202 226 263 295 328 367 454 509

158.9 11.0 5.88 8.55 12.6 17.7 23.4 35.0 46.3 58.5 65.5 74.6 83.6 107 120 138 154 186 208 232 260 288 322 406 455175.9 10 5.07 6.83 9.24 15.4 20.4 32.7 39.3 52.0 58.2 65.2 73.0 90.2 101 121 136 149 167 219 245 265 297 367 411194.6 9.0 4.54 6.31 8.85 13.8 18.0 28.2 37.6 47.8 53.5 62.4 69.9 76.0 85.1 106 119 133 149 180 202 234 262 304 340

1430

34.74 40 20.9 29.8 42.5 64.7 91.3 131 167 175 183 283 317 325 332 412 461 535 599 699 783 959 1074 1258 140938.44 37 18.9 26.8 44.3 59.4 77.1 112 151 150 168 242 271 296 332 372 417 482 540 685 767 904 1013 1133 126942.54 34 17.6 24.1 35.4 51.9 67.8 104 136 150 168 213 239 277 310 425 476 507 568 694 777 862 965 1154 129247.08 30 16.1 23.2 36.3 50.5 62.4 90.9 122 150 168 199 223 267 299 342 383 479 537 586 656 771 863 988 1106

52.11 27 14.1 20.0 28.8 45.6 61.7 84.8 115 134 150 174 195 229 257 359 402 422 473 592 663 711 796 954 106857.66 25 12.9 19.9 30.3 40.2 52.8 74.5 102 123 138 164 184 223 250 288 323 384 430 492 551 602 674 870 97463.82 22 11.9 15.9 23.9 38.5 46.4 69.5 96.3 110 123 143 160 192 215 296 331 349 391 476 533 584 654 796 89170.62 20 10.7 15.5 24.9 34.2 42.6 64.8 84.9 104 116 138 155 188 211 238 266 317 355 409 458 513 574 680 762

78.16 18 9.41 13.5 19.5 31.1 42.4 60.4 82.0 91.1 102 119 133 159 178 248 278 295 330 378 423 487 545 646 72486.50 16.5 8.65 13.5 20.8 28.4 36.7 52.3 71.7 85.8 96.1 111 124 156 175 200 224 268 300 351 393 439 492 600 67295.73 15 7.90 10.5 16.2 25.1 32.2 48.1 67.9 76.6 85.8 93.8 105 131 147 204 229 218 244 249 254 401 430 439 448105.9 13.5 7.01 10.5 15.2 23.2 29.5 42.1 59.0 72.5 81.2 92.9 104 129 144 163 183 221 247 304 341 362 405 493 552

117.2 12 6.45 8.99 13.2 21.0 25.9 39.3 55.2 64.4 72.1 84.2 94.3 108 121 171 191 204 228 246 275 324 363 444 497129.7 11.0 5.96 9.08 14.2 18.6 25.2 35.7 47.8 57.6 64.5 76.1 85.2 106 119 139 156 187 209 238 266 293 328 410 459143.6 10 5.41 7.12 11.0 16.3 22.1 31.6 40.0 53.8 60.3 68.8 77.1 89.3 100 134 150 166 186 217 243 270 302 374 419

158.9 9.0 4.84 7.04 10.4 14.6 19.3 28.8 38.2 48.3 54.1 61.7 69.1 88.0 98.6 113 127 154 172 192 215 237 265 335 375175.9 8.1 4.17 5.62 7.58 12.7 16.8 26.8 32.2 42.9 48.0 54.2 60.7 74.0 82.9 101 113 123 138 181 203 218 244 304 341194.6 7.5 3.74 5.19 7.26 11.4 14.8 23.2 31.2 39.6 44.4 51.5 57.7 62.8 70.3 87.9 98.5 110 123 149 167 193 216 251 281

1170

34.74 34 17.2 25.0 35.0 53.4 75.3 108 137 144 150 231 259 265 272 340 381 465 521 580 650 797 893 1092 122438.44 30 15.6 23.3 36.7 48.9 64.0 92.3 126 122 137 202 226 243 272 308 345 419 469 580 650 772 865 985 110342.54 27 14.5 19.8 29.1 42.8 56.3 86.1 114 122 137 177 198 229 256 354 397 423 474 573 642 713 798 955 107047.08 25 13.2 19.2 30.0 41.6 51.7 74.9 102 122 137 165 185 222 249 285 319 397 445 489 548 637 713 826 925

52.11 22 11.6 16.5 23.7 37.5 50.8 69.8 96.3 110 123 143 160 189 212 299 335 353 395 489 548 588 658 788 88357.66 20 10.6 16.4 25.1 33.1 43.8 61.4 84.9 102 114 137 153 186 208 240 269 320 358 413 463 507 568 719 80563.82 18 9.76 13.1 19.7 31.5 38.4 57.2 80.4 91.1 102 118 132 158 177 245 274 290 325 396 444 482 540 657 73670.62 16.5 8.79 12.8 20.6 28.1 35.3 53.3 70.3 85.8 96.1 114 128 155 174 197 221 263 295 341 382 422 473 591 662

78.16 15 7.73 11.1 16.1 25.6 34.9 49.7 68.4 75.3 84.3 98.2 110 131 147 204 229 243 272 314 352 402 450 536 60086.50 13.5 7.14 11.2 17.2 23.3 30.3 43.0 59.4 71.1 79.6 92.0 103 129 144 166 186 222 249 292 327 363 406 495 55495.73 12 6.49 8.72 13.3 20.6 26.6 39.5 56.3 63.5 71.1 77.5 86.8 108 121 169 189 196 200 204 209 330 354 361 369105.9 11.0 5.78 8.72 12.6 19.0 24.4 34.6 48.8 60.0 67.2 76.6 85.8 106 119 136 152 183 205 251 281 297 333 406 455

117.2 10 5.30 7.38 10.9 17.4 21.4 32.3 45.4 53.3 59.7 70.2 78.6 89.0 99.7 140 157 167 187 205 230 268 300 366 410129.7 9.0 4.89 7.48 11.7 15.3 20.8 29.4 39.5 47.6 53.3 62.9 70.5 87.4 97.9 115 129 155 174 196 219 241 270 338 378143.6 8.1 4.44 5.85 9.03 13.4 18.2 26.0 33.2 44.8 50.2 57.2 64.1 73.7 82.6 112 125 137 153 179 200 222 249 309 346

158.9 7.5 3.99 5.80 8.58 12.0 15.9 23.6 31.6 39.9 44.7 51.0 57.1 72.4 81.1 93.8 105 127 142 159 178 195 218 276 309175.9 6.6 3.44 4.63 6.22 10.5 13.8 22.0 26.5 35.4 39.6 45.0 50.4 60.9 68.2 83.1 93.1 102 114 150 168 179 201 252 282194.6 6.0 3.07 4.28 5.96 9.39 12.2 19.0 25.9 32.7 36.6 42.5 47.6 51.9 58.1 72.8 81.5 91.1 102 124 139 159 178 208 233




HighSpeedShaftrpm

NominalRatio�4%

Approx.L.S.

Shaftrpm

DRIVE SIZE �

2050 2060 2070 2080 2090 2100 2110 2120 2125 2130 2135 2140 2145 2150 2155 2160 2165 2170 2175 2180 2185 2190 2195

1750

34.74 50 31.4 40.8 64.2 99.3 138 188 238 274 285 407 456 534 538 635 711 871 889 1070 1199 1453 1627 1874 210038.44 45 32.6 42.4 71.5 101 132 188 249 269 286 393 440 509 570 636 712 791 886 1127 1262 1459 1634 1866 209042.54 40 32.2 42.8 65.0 100 128 190 247 274 307 379 424 524 587 771 863 1080 1090 1274 1427 1554 1741 2133 238847.08 37 33.3 45.4 72.6 102 135 189 254 307 344 403 451 566 634 719 805 969 1085 1200 1344 1600 1792 2061 2308

52.11 34 31.9 44.5 65.5 103 140 192 252 297 333 383 429 527 590 787 881 1092 1116 1285 1439 1573 1762 2157 241557.66 30 33.5 50.7 73.6 103 137 191 258 315 353 410 459 577 646 731 819 964 1080 1271 1424 1521 1704 2121 237663.82 27 32.4 43.5 65.8 106 132 193 258 302 338 387 433 535 599 802 898 1017 1139 1253 1403 1592 1783 2182 244470.62 25 33.7 46.5 74.6 103 139 192 262 321 359 417 467 588 658 748 838 982 1100 1251 1401 1587 1777 2024 2267

78.16 22 32.3 45.1 66.3 107 142 194 264 307 344 390 437 538 603 814 912 1036 1160 1283 1437 1607 1800 2173 243286.50 20 34.2 51.7 75.2 104 140 192 266 324 363 423 474 596 668 757 848 1001 1121 1272 1425 1652 1850 2241 251095.73 18 32.9 44.8 66.7 107 135 196 269 311 348 392 439 540 605 825 924 1025 1043 1051 1098 1622 1740 1850 1889105.9 16.5 32.8 48.0 68.0 104 142 195 270 329 368 429 480 590 661 771 864 1016 1138 1378 1543 1665 1865 2215 2481

117.2 15 32.5 45.6 66.5 106 137 197 275 313 351 417 467 546 611 830 930 1062 1189 1262 1413 1646 1844 2260 2533129.7 13.5 34.7 52.6 76.9 105 143 196 273 333 373 436 488 607 680 779 873 1032 1156 1394 1561 1680 1882 2316 2594143.6 12 33.1 44.2 67.2 104 138 198 251 319 357 427 478 546 611 799 895 1069 1197 1349 1511 1648 1846 2263 2535

158.9 11.0 33.3 48.4 68.9 104 133 197 276 337 377 441 494 610 683 791 886 1048 1174 1342 1503 1694 1897 2310 2587175.9 10 31.9 43.2 57.8 99.1 126 199 247 321 360 406 455 551 617 757 848 964 1080 1369 1533 1665 1865 2229 2497194.6 9.0 31.1 44.3 59.6 98.0 123 197 266 338 379 446 499 540 605 721 807 926 1037 1227 1374 1652 1850 2090 2341

1430

34.74 40 31.6 43.4 64.7 100 139 190 246 273 284 410 459 517 528 642 719 845 946 1087 1218 1481 1658 1991 233038.44 37 33.1 45.0 72.6 102 134 190 254 256 287 401 449 529 593 642 719 841 942 1196 1340 1550 1736 1982 222042.54 34 32.4 43.1 65.5 101 130 191 252 275 308 382 428 530 594 787 881 995 1115 1290 1244 1574 1763 2157 241547.08 30 33.6 46.1 73.7 103 137 191 258 308 345 410 459 577 646 733 821 1023 1146 1228 1375 1619 1813 2110 2363

52.11 27 32.0 44.6 66.0 106 141 193 258 298 334 387 433 535 599 801 897 1015 1137 1300 1456 1592 1783 2184 244657.66 25 33.9 51.2 74.3 103 138 193 262 321 359 415 465 587 657 746 835 983 1101 1312 1469 1571 1759 2254 252563.82 22 32.8 43.6 66.2 106 134 194 265 305 342 390 437 539 604 816 914 1036 1160 1277 1430 1607 1800 2205 247070.62 20 33.9 47.2 75.2 104 140 194 267 325 364 423 474 597 669 761 852 1002 1122 1274 1427 1604 1796 2153 2411

78.16 18 32.4 45.1 66.5 107 142 195 270 312 349 392 439 543 608 827 926 1051 1177 1307 1464 1622 1817 2236 250686.50 16.5 34.5 52.1 76.0 105 142 194 269 329 368 430 482 603 675 771 864 1018 1140 1294 1449 1665 1865 2298 257495.73 15 33.0 45.4 66.8 108 137 197 275 314 352 394 441 543 608 832 932 959 1074 1086 1109 1638 1757 1869 1907

105.9 13.5 33.0 48.6 68.4 105 143 196 273 332 372 437 489 602 674 781 875 1034 1158 1392 1559 1681 1883 2320 2598

117.2 12 32.6 45.6 66.7 107 138 198 279 318 356 426 477 550 616 837 937 1069 1197 1291 1446 1685 1887 2288 2562129.7 11.0 34.9 53.1 77.3 105 145 197 276 338 378 441 494 610 683 792 887 1044 1169 1401 1569 1691 1894 2336 2616143.6 10 33.2 44.4 67.5 104 139 199 256 325 364 435 487 552 618 814 912 1077 1206 1360 1523 1660 1859 2280 2554

158.9 9.0 33.5 48.8 69.6 105 134 198 279 340 381 446 500 613 687 799 895 1061 1188 1358 1521 1705 1910 2330 2610175.9 8.1 32.1 43.5 58.0 100 127 200 248 325 364 413 463 554 620 770 862 975 1092 1388 1555 1674 1875 2263 2535194.6 7.5 31.3 44.6 59.8 99.1 123 198 270 344 385 451 505 546 612 730 818 935 1047 1241 1390 1667 1867 2114 2368

1170

34.74 34 31.8 44.5 65.1 101 140 191 247 273 285 409 458 515 529 648 726 896 1004 1104 1237 1503 1684 1932 216638.44 30 33.4 47.8 73.5 103 136 191 259 255 286 409 458 530 594 649 727 893 1000 1239 1388 1618 1812 2105 235842.54 27 32.6 43.3 65.8 102 132 193 258 274 307 387 433 535 599 802 898 1017 1140 1301 1457 1591 1782 2185 244747.08 25 33.7 46.6 74.4 103 138 193 264 307 344 415 465 588 658 746 835 1037 1161 1253 1403 1635 1831 2156 2415

52.11 22 32.1 45.0 66.3 106 142 194 264 299 335 388 435 539 604 816 914 1036 1160 1313 1471 1608 1801 2206 247157.66 20 34.0 51.6 75.3 104 140 194 266 324 363 422 473 596 668 759 850 1000 1120 1346 1508 1617 1811 2277 255063.82 18 32.9 43.9 66.7 106 135 196 270 309 346 394 441 543 608 826 925 1053 1179 1300 1456 1621 1816 2227 249470.62 16.5 34.1 47.7 76.1 104 142 195 270 329 368 427 478 602 674 772 865 1018 1140 1299 1455 1614 1808 2286 2560

78.16 15 32.5 45.4 67.1 108 143 196 275 314 352 396 444 548 614 833 933 1058 1185 1329 1489 1637 1833 2269 254186.50 13.5 34.8 52.8 76.8 105 143 195 273 333 373 438 490 605 678 783 877 1032 1156 1315 1473 1679 1881 2316 259495.73 12 33.2 46.1 67.0 108 138 198 278 318 356 397 445 546 611 839 940 1055 1076 1087 1115 1650 1768 1881 1920

105.9 11.0 33.3 49.3 69.3 105 145 197 276 337 377 440 493 607 680 794 889 1049 1175 1402 1570 1689 1892 2337 2617

117.2 10 32.7 45.8 67.3 108 139 199 280 321 360 434 486 554 620 841 942 1071 1200 1320 1478 1702 1906 2306 2583129.7 9.0 35.0 53.5 77.8 106 146 198 279 340 381 446 499 613 687 800 896 1063 1190 1410 1579 1701 1905 2351 2633143.6 8.1 33.3 44.6 67.8 105 140 200 259 330 370 442 495 557 624 829 929 1082 1212 1368 1532 1672 1873 2302 2578

158.9 7.5 33.8 49.1 70.2 105 135 198 282 344 385 451 505 617 691 807 904 1070 1198 1374 1539 1715 1921 2346 2628175.9 6.6 32.4 43.8 58.2 101 128 200 249 328 367 420 470 556 623 775 868 984 1102 1404 1573 1686 1888 2288 2562194.6 6.0 31.4 44.9 60.0 99.8 124 198 274 346 388 454 509 552 618 738 827 947 1061 1263 1414 1679 1880 2142 2399

� Torque ratings shown in bold face type exceed the drive thermal ratings. Convert required torque (without service factor) to hp and refer to Page 27 for thermal hp ratingsand Page 28 for Falk™ cooling fans. For ratings at speeds higher than 1750 rpm, contact Fctory; below 580 rpm, use torques for 580 rpm.


Type YB3/Horsepower RatingsRatios 34.74through 194.6 Triple Reduction 870 through 580 rpm


HighSpeedShaftrpm

NominalRatio�4%

Approx.L.S.

Shaftrpm

DRIVE SIZE �

2050 2060 2070 2080 2090 2100 2110 2120 2125 2130 2135 2140 2145 2150 2155 2160 2165 2170 2175 2180 2185 2190 2195

870

34.74 25 12.9 18.6 26.3 40.1 56.6 81.2 102 107 111 172 193 198 202 256 287 360 403 441 494 606 679 853 95538.44 22 11.8 18.6 27.8 36.7 48.6 69.3 95.5 91.1 102 154 172 187 202 232 260 340 381 441 494 583 653 788 88342.54 21 10.8 14.9 21.8 32.1 42.6 64.7 87.8 91.1 102 133 149 171 192 271 303 323 362 433 485 538 602 721 80847.08 18 9.89 14.5 22.7 31.2 39.2 56.2 77.1 91.1 102 126 141 169 189 217 243 302 338 373 418 480 538 632 708

52.11 17 8.70 12.4 17.7 27.9 38.1 52.4 73.8 81.3 91.1 108 121 142 159 226 253 267 299 369 413 443 496 595 66657.66 15 8.02 12.4 19.0 24.8 33.1 46.0 64.3 77.3 86.6 104 116 140 157 183 205 244 273 317 355 390 437 542 60763.82 14 7.30 9.79 14.7 23.4 29.0 42.9 61.5 69.2 77.5 88.2 98.8 119 133 184 206 218 244 303 339 363 407 496 55570.62 12.5 6.57 9.63 15.5 21.0 26.6 40.0 53.2 65.0 72.8 87.0 97.4 117 131 149 167 200 224 259 290 318 356 447 501

78.16 11 5.78 8.31 12.0 19.2 26.1 37.3 51.7 56.9 63.7 73.4 82.2 98.2 110 154 172 183 205 239 268 302 338 403 45186.50 10 5.34 8.41 12.9 17.5 22.9 32.2 44.9 53.8 60.2 69.3 77.6 96.4 108 126 141 169 189 221 248 272 305 372 41795.73 9.1 4.85 6.60 9.97 15.4 20.1 29.6 42.2 47.9 53.7 58.1 65.1 81.3 91.0 127 142 147 150 153 157 248 266 271 277

105.9 8.3 4.34 6.60 9.46 14.2 18.3 25.9 36.8 45.3 50.7 57.9 64.8 80.0 89.6 103 115 138 155 188 211 223 250 305 342

117.2 7.5 3.96 5.52 8.12 13.1 16.1 24.2 34.0 40.2 45.0 53.5 59.9 66.7 74.7 105 118 126 141 156 175 201 225 275 308129.7 6.8 3.65 5.61 8.82 11.5 15.5 22.0 29.8 35.9 40.2 47.5 53.2 65.5 73.4 87.1 97.6 117 131 147 165 181 203 254 284143.6 6.1 3.32 4.37 6.75 9.99 13.7 19.4 25.2 34.0 38.1 43.5 48.7 55.2 61.8 85.1 95.3 103 115 134 150 167 187 231 259

158.9 5.5 2.99 4.35 6.44 9.02 11.9 17.7 23.7 30.0 33.6 38.4 43.0 54.2 60.7 71.0 79.5 95.5 107 121 135 146 164 206 231175.9 5.0 2.58 3.47 4.65 7.85 10.4 16.5 19.8 26.6 29.8 34.2 38.3 45.5 51.0 62.7 70.2 77.1 86.4 113 127 135 151 191 214194.6 4.5 2.30 3.20 4.45 7.04 9.16 14.2 19.6 24.6 27.5 32.0 35.8 39.0 43.7 54.8 61.4 68.6 76.8 93.8 105 119 133 157 176

720

34.74 21 10.7 15.5 21.8 33.3 47.1 67.6 84.5 88.0 92.0 143 160 163 167 214 240 302 338 370 414 509 570 713 79838.44 18 9.85 15.5 23.2 30.6 40.6 57.7 80.1 75.4 84.5 129 145 156 167 194 217 298 334 370 414 487 545 658 73742.54 17 9.02 12.4 18.2 26.7 35.7 53.8 74.1 79.0 84.5 111 124 143 160 226 253 271 303 361 404 449 503 602 67447.08 15 8.22 12.1 19.0 25.9 32.7 46.8 64.6 75.4 84.5 105 118 141 158 182 204 252 282 314 352 401 449 532 596

52.11 14 7.23 10.3 14.7 23.1 31.7 43.6 62.1 67.3 75.4 89.3 100 119 133 188 211 223 250 307 344 370 414 496 55657.66 12.5 6.68 10.3 15.8 20.6 27.6 38.3 53.8 64.7 72.5 87.0 97.4 117 131 154 172 204 229 264 296 325 364 452 50663.82 11 6.07 8.14 12.2 19.4 24.2 35.7 51.2 57.9 64.9 73.5 82.3 99.1 111 154 172 182 204 254 284 303 339 413 46370.62 10.0 5.46 8.03 13.0 17.5 22.2 33.2 44.5 54.4 60.9 72.8 81.5 97.3 109 125 140 168 188 217 243 265 297 373 418

78.16 9.1 4.80 6.90 9.98 15.9 21.7 31.0 43.0 47.6 53.3 61.1 68.4 81.8 91.6 128 143 152 170 200 224 252 282 336 37686.50 8.3 4.43 7.00 10.8 14.5 19.0 26.8 37.5 44.9 50.3 57.9 64.9 80.4 90.0 105 118 141 158 186 208 227 254 310 34795.73 7.5 4.02 5.51 8.28 12.8 16.7 24.6 35.1 40.1 44.9 48.3 54.1 67.6 75.7 105 118 112 125 128 131 206 222 226 231

105.9 6.8 3.61 5.51 7.88 11.8 15.2 21.5 30.7 37.9 42.4 48.3 54.1 66.5 74.5 85.7 96.0 116 130 156 175 186 208 254 285

117.2 6.1 3.29 4.58 6.74 10.9 13.4 20.1 28.2 33.6 37.6 44.8 50.2 55.4 62.1 87.6 98.1 104 117 132 148 167 187 229 256129.7 5.5 3.03 4.67 7.34 9.51 12.9 18.2 24.8 29.9 33.5 39.6 44.3 54.5 61.0 72.8 81.5 97.3 109 122 137 151 169 211 236143.6 5.0 2.75 3.62 5.60 8.29 11.4 16.1 21.1 28.5 31.9 36.4 40.8 45.9 51.4 71.1 79.6 85.0 95.2 112 125 138 155 193 216

158.9 4.5 2.49 3.62 5.36 7.50 9.94 14.7 19.8 25.0 28.0 32.0 35.8 45.0 50.4 59.3 66.4 79.6 89.1 100 112 121 136 172 193175.9 4.1 2.14 2.89 3.85 6.53 8.66 13.7 16.4 22.2 24.9 28.7 32.1 37.9 42.4 52.3 58.6 64.4 72.1 94.6 106 112 125 160 179194.6 3.8 1.91 2.66 3.69 5.86 7.63 11.8 16.4 20.4 22.9 26.6 29.8 32.5 36.4 45.7 51.2 57.2 64.1 77.9 87.3 99.1 111 131 147

580

34.74 17 8.69 12.5 17.7 27.0 38.2 54.9 68.1 71.0 74.1 115 129 132 135 174 195 246 275 302 338 415 465 574 64338.44 15 8.01 12.5 18.9 24.7 33.1 46.8 65.4 60.8 68.1 105 118 127 135 157 176 246 275 302 338 396 443 536 60042.54 14 7.30 10.0 14.7 21.6 29.1 43.6 60.8 65.0 68.1 90.2 101 116 130 183 205 220 246 293 328 365 409 489 54847.08 12.5 6.65 9.83 15.4 21.0 26.6 37.9 52.6 60.8 68.1 86.2 96.5 114 128 149 167 204 229 257 288 326 365 437 489

52.11 11 5.85 8.31 11.9 18.6 25.7 35.3 50.4 54.3 60.8 72.8 81.5 96.4 108 153 171 181 203 249 279 300 336 404 45257.66 10.0 5.40 8.40 12.9 16.7 22.5 31.0 43.8 52.8 59.1 71.0 79.5 94.6 106 125 140 167 187 214 240 264 296 367 41163.82 9.1 4.90 6.58 9.91 15.6 19.7 28.9 41.4 47.2 52.9 59.6 66.7 80.2 89.8 124 139 147 165 207 232 246 275 336 37670.62 8.3 4.41 6.51 10.5 14.1 18.0 26.9 36.2 44.3 49.6 59.3 66.4 78.8 88.2 102 114 137 153 178 199 215 241 303 339

78.16 7.5 3.88 5.58 8.07 12.9 17.6 25.1 34.8 38.7 43.4 49.5 55.4 66.3 74.2 104 116 123 138 163 183 204 229 272 30586.50 6.8 3.58 5.68 8.76 11.7 15.4 21.7 30.5 36.5 40.9 47.1 52.8 65.1 72.9 85.6 95.9 115 129 152 170 184 206 252 28295.73 6.1 3.25 4.48 6.70 10.4 13.6 19.9 28.4 32.6 36.5 39.1 43.8 54.7 61.3 85.2 95.4 90.2 101 103 106 168 179 183 187

105.9 5.5 2.93 4.48 6.39 9.56 12.3 17.4 25.0 30.7 34.4 39.3 44.0 53.8 60.3 69.7 78.1 93.8 105 127 142 151 169 206 231

117.2 5.0 2.65 3.70 5.45 8.77 10.9 16.2 22.8 27.2 30.5 36.7 41.1 44.9 50.3 71.0 79.5 84.6 94.7 108 121 136 152 185 207129.7 4.5 2.45 3.78 5.95 7.68 10.4 14.8 20.1 24.3 27.2 32.1 36.0 44.0 49.3 59.2 66.3 79.1 88.6 99.1 111 122 137 171 191143.6 4.1 2.22 2.93 4.52 6.70 9.25 13.0 17.2 23.2 26.0 29.7 33.3 37.1 41.6 57.5 64.4 68.8 77.1 90.2 101 113 126 156 175

158.9 3.8 2.01 2.93 4.34 6.08 8.06 11.9 16.0 20.4 22.8 25.9 29.0 36.4 40.8 48.1 53.9 64.4 72.1 81.6 91.4 98.2 110 139 156175.9 3.3 1.73 2.34 3.11 5.29 7.01 11.0 13.3 18.0 20.2 23.3 26.1 30.6 34.3 42.5 47.6 52.3 58.6 76.9 86.1 90.2 101 129 145194.6 3.0 1.55 2.16 2.98 4.74 6.18 9.54 13.3 16.6 18.6 21.5 24.1 26.4 29.6 37.1 41.6 46.5 52.1 63.4 71.0 79.9 89.5 107 120

� For ratings of speeds higher than 1750 rpm, contact Factory; below 580 rpm, reduce hp rating proportionately.



HighSpeedShaftrpm

NominalRatio�4%

Approx.L.S.

Shaftrpm

DRIVE SIZE �

2050 2060 2070 2080 2090 2100 2110 2120 2125 2130 2135 2140 2145 2150 2155 2160 2165 2170 2175 2180 2185 2190 2195

870

34.74 25 32.1 44.5 65.8 102 141 193 247 273 283 410 459 518 528 656 735 945 1058 1129 1265 1538 1722 2221 248638.44 22 34.0 51.3 74.9 104 139 193 264 255 286 419 469 549 593 658 737 975 1092 1267 1419 1642 1839 2267 253942.54 21 32.6 43.8 66.3 103 134 195 267 275 308 391 438 540 605 822 921 1044 1169 1321 1480 1614 1808 2219 248547.08 18 33.9 47.3 75.7 104 141 194 268 307 344 426 477 599 671 764 856 1059 1186 1286 1440 1659 1858 2220 2486

52.11 17 32.4 45.5 66.6 106 143 196 273 298 334 395 442 544 609 829 928 1054 1181 1331 1491 1630 1826 2238 250757.66 15 34.6 52.4 76.6 105 143 195 271 331 371 430 482 605 678 778 871 1026 1149 1388 1555 1673 1874 2309 258663.82 14 33.1 44.1 66.9 106 137 197 278 316 354 396 443 548 614 835 935 1063 1190 1335 1495 1644 1841 2258 252970.62 12.5 34.2 48.2 77.0 105 144 196 275 335 375 438 490 610 683 785 879 1039 1164 1327 1486 1634 1830 2326 2605

78.16 11 32.7 45.7 67.3 109 144 198 279 320 358 398 446 552 618 841 942 1072 1201 1362 1525 1654 1852 2294 256986.50 10 35.0 53.3 77.5 106 145 196 277 338 379 443 496 611 684 798 894 1054 1180 1342 1503 1697 1901 2345 262695.73 9.1 33.3 46.9 67.6 109 140 199 281 323 362 401 449 552 618 847 949 1066 1085 1098 1126 1667 1787 1898 1938

105.9 8.3 33.6 50.2 69.9 106 146 198 280 341 382 447 501 615 689 807 904 1067 1195 1416 1586 1705 1910 2363 2646

117.2 7.5 32.9 46.0 67.5 110 141 200 282 326 365 445 498 558 625 850 952 1087 1217 1350 1512 1717 1923 2329 2609129.7 6.8 35.1 54.0 78.9 107 146 199 283 346 387 453 507 619 693 814 912 1075 1204 1429 1600 1720 1926 2375 2660143.6 6.1 33.5 44.8 68.1 105 142 201 265 338 378 451 505 560 627 851 953 1094 1225 1380 1546 1689 1892 2317 2595

158.9 5.5 34.0 49.5 70.9 107 136 200 285 347 389 456 511 621 695 821 920 1084 1214 1402 1570 1735 1943 2359 2642175.9 5.0 32.6 44.1 58.5 102 130 202 250 331 371 429 481 560 627 786 880 1003 1123 1428 1599 1703 1907 2335 2615194.6 4.5 31.7 45.2 60.3 101 126 199 279 350 392 460 515 558 625 748 838 960 1075 1282 1436 1687 1889 2176 2437

720

34.74 21 32.2 44.8 65.9 102 142 194 247 272 284 411 460 515 528 663 743 951 1065 1144 1281 1560 1747 2246 251438.44 18 34.3 51.6 75.5 104 141 194 268 255 286 426 477 554 592 663 743 1033 1157 1283 1437 1656 1855 2287 256142.54 17 32.9 44.0 66.9 103 136 196 273 288 308 394 441 544 609 830 930 1055 1182 1330 1490 1629 1825 2237 250547.08 15 34.1 47.7 76.6 104 142 196 272 308 345 430 482 605 678 775 868 1067 1195 1308 1465 1672 1873 2258 2529

52.11 14 32.6 45.6 66.9 106 144 197 277 298 334 394 441 549 615 835 935 1065 1193 1340 1501 1645 1842 2258 252957.66 12.5 34.8 52.6 77.0 105 144 197 274 335 375 437 489 611 684 788 883 1040 1165 1399 1567 1684 1886 2326 260563.82 11 33.2 44.3 67.1 106 138 198 279 320 358 398 446 553 619 843 944 1073 1202 1352 1514 1654 1853 2276 254970.62 10.0 34.4 48.6 78.0 106 145 197 278 338 379 442 495 613 686 796 891 1054 1180 1343 1504 1647 1845 2346 2627

78.16 9.1 32.8 45.8 67.6 109 145 199 281 323 362 400 448 554 621 845 946 1075 1204 1375 1540 1667 1867 2310 258786.50 8.3 35.1 53.6 78.4 106 146 197 280 342 383 447 501 615 689 807 904 1064 1192 1360 1523 1708 1913 2357 264095.73 7.5 33.4 47.3 67.8 109 141 200 282 326 365 403 451 555 622 851 953 976 1093 1108 1135 1674 1801 1913 1953

105.9 6.8 33.8 50.6 70.4 106 146 199 282 345 386 451 505 618 692 814 912 1081 1211 1419 1589 1714 1920 2379 2664

117.2 6.1 33.0 46.2 67.7 110 142 201 283 329 368 450 504 561 628 854 956 1089 1220 1379 1545 1724 1931 2340 2621129.7 5.5 35.2 54.3 79.3 107 147 199 284 348 390 455 510 621 696 821 920 1081 1211 1433 1605 1730 1938 2385 2671143.6 5.0 33.6 44.8 68.3 105 143 201 268 341 382 457 512 563 631 859 962 1095 1226 1389 1556 1692 1895 2335 2615

158.9 4.5 34.2 49.8 71.3 107 137 201 287 350 392 459 514 623 698 829 929 1091 1222 1404 1573 1738 1947 2382 2668175.9 4.1 32.7 44.4 58.6 102 130 203 250 335 375 435 487 562 629 793 888 1012 1133 1439 1612 1704 1908 2360 2643194.6 3.8 31.8 45.4 60.4 101 126 200 282 353 395 463 518 562 629 754 844 968 1084 1288 1443 1701 1905 2196 2460

580

34.74 17 32.4 44.8 66.4 103 143 196 247 272 284 411 460 516 530 670 750 954 1069 1159 1298 1579 1769 2240 250938.44 15 34.6 51.7 76.4 105 142 195 271 256 287 430 482 556 594 668 748 1056 1183 1300 1456 1671 1872 2311 258842.54 14 33.1 44.1 67.0 104 138 197 278 294 308 398 446 548 614 835 935 1063 1191 1341 1502 1645 1842 2257 252847.08 12.5 34.2 48.1 77.0 105 144 197 275 308 345 438 490 609 682 788 882 1076 1205 1329 1488 1688 1891 2300 257652.11 11 32.7 45.7 67.2 106 145 198 279 298 334 399 447 554 620 840 941 1074 1203 1349 1511 1656 1855 2279 255257.66 10.0 34.9 53.3 78.0 106 145 198 277 338 379 443 496 613 687 796 892 1054 1181 1408 1577 1700 1904 2346 262763.82 9.1 33.3 44.5 67.6 106 140 199 280 323 362 401 449 555 622 846 947 1078 1207 1371 1535 1666 1866 2295 257070.62 8.3 34.5 48.9 78.2 106 146 198 280 342 383 447 501 615 689 804 901 1064 1192 1365 1529 1660 1859 2361 264478.16 1.5 32.9 46.0 67.8 110 146 200 282 327 366 403 451 558 625 851 953 1083 1213 1395 1562 1680 1882 2327 260686.50 6.8 35.2 54.0 78.9 106 147 198 283 345 386 452 506 619 693 814 912 1079 1208 1379 1545 1720 1926 2378 266395.73 6.1 33.5 47.7 68.1 110 142 201 283 329 369 404 453 558 625 854 957 979 1096 1109 1141 1691 1804 1919 1962

105.9 5.5 34.0 51.1 70.9 107 147 200 285 347 389 455 510 621 696 822 921 1084 1214 1429 1601 1729 1937 2394 2681117.2 5.0 33.0 46.3 67.9 110 143 201 284 331 371 457 512 563 631 859 962 1095 1226 1400 1568 1739 1948 2349 2631129.7 4.5 35.3 54.6 79.8 107 147 201 286 351 393 459 514 623 698 829 929 1091 1222 1441 1614 1741 1950 2396 2684143.6 4.1 33.6 45.1 68.4 106 144 202 271 346 387 463 518 565 633 863 966 1100 1232 1394 1561 1707 1912 2348 2630158.9 3.8 34.3 50.1 71.7 108 138 202 288 354 396 462 517 626 701 836 936 1096 1227 1423 1594 1746 1955 2390 2677175.9 3.3 32.8 44.6 58.7 103 131 202 252 337 377 438 491 564 632 799 895 1021 1143 1452 1626 1709 1914 2373 2658194.6 3.0 32.0 45.7 60.6 102 127 201 284 355 398 464 520 567 635 760 851 977 1094 1301 1457 1703 1907 2226 2493

� For ratings of speeds higher than 1750 rpm, contact Factory; below 580 rpm, use torques for 580 rpm.


Type YB4/Horsepower RatingsRatios 215.4 through 1207 Quadruple Reduction 1750 through 1170 rpm


HighSpeedShaftrpm

NominalRatio±5%

Approx.L.S.

Shaftrpm

DRIVE SIZE �

2050 2060 2070 2080 200 2100 2110 2120 2125 2130 2135

1750

215.4 8.1 4.47 6.13 9.00 13.2 18.1 26.9 33.7 41.7 46.7 59.4 66.5238.4 7.5 4.01 6.08 8.55 11.8 15.8 23.2 30.4 38.2 42.8 50.6 56.7263.8 6.6 3.65 5.08 7.33 11.8 15.5 22.8 27.8 34.6 38.7 47.3 53.0291.9 6.0 3.37 5.18 7.97 10.4 13.6 19.7 27.3 31.6 35.4 42.2 47.3

323.1 5.4 3.06 4.03 6.08 9.05 12.0 17.7 24.6 27.9 31.2 40.0 44.8357.5 5.0 2.76 4.01 5.81 8.18 10.4 15.3 21.9 25.5 28.6 34.4 38.5395.7 4.4 2.43 3.33 4.81 7.85 10.2 15.0 19.1 23.1 25.9 32.5 36.4437.9 4.0 2.19 3.33 4.62 6.87 8.88 12.9 18.6 21.2 23.7 28.7 32.1

484.6 3.6 1.98 2.76 3.92 5.99 8.00 11.7 16.5 18.8 21.0 27.1 30.4536.3 3.2 1.83 2.83 4.29 5.45 6.97 10.1 14.6 17.1 19.2 23.4 26.2593.5 2.9 1.66 2.18 3.25 4.74 6.79 9.95 12.9 15.5 17.4 22.3 25.0656.8 2.7 1.50 2.19 3.13 4.25 5.91 8.59 12.4 14.2 15.9 19.4 21.7

726.9 2.4 1.30 1.85 2.68 4.10 5.27 7.78 10.3 12.6 14.1 18.3 20.5804.5 2.2 1.22 1.90 2.95 3.74 4.59 6.72 8.66 11.5 12.9 15.8 17.7890.3 2.0 1.11 1.46 2.22 3.25 4.47 6.59 8.66 10.4 11.7 15.2 17.0985.3 1.8 1.01 1.47 2.15 2.91 3.89 5.69 8.27 9.55 10.7 13.0 14.6

1090 1.6 .870 1.17 1.53 2.20 3.39 5.33 6.79 9.02 10.1 10.7 12.01207 1.5 .778 1.08 1.46 2.16 2.98 4.60 5.76 7.54 8.45 9.11 10.2

1430

215.4 6.6 3.66 5.03 7.38 10.8 14.9 22.0 29.3 34.1 38.2 48.7 54.6238.4 6.0 3.29 5.00 7.03 9.72 13.0 19.0 26.4 31.2 34.9 41.8 46.8263.8 5.4 2.99 4.17 6.00 9.71 12.7 18.7 23.0 28.3 31.7 39.2 43.9291.9 5.0 2.76 4.26 6.55 8.50 11.1 16.1 22.4 25.8 28.9 34.8 39.0

323.1 4.4 2.51 3.30 4.98 7.41 9.86 14.5 20.3 22.8 25.5 32.9 36.8357.5 4.0 2.26 3.30 4.78 6.72 8.59 12.5 18.0 20.8 23.3 28.3 31.7395.7 3.6 1.99 2.73 3.94 6.43 8.37 12.3 15.8 18.9 21.2 26.9 30.1437.9 3.2 1.80 2.73 3.79 5.63 7.29 10.6 15.3 17.2 19.3 23.5 26.3

484.6 2.9 1.62 2.26 3.21 4.91 6.57 9.63 13.5 15.4 17.2 22.2 24.9536.3 2.7 1.49 2.32 3.52 4.47 5.72 8.31 12.0 14.0 15.7 19.1 21.4593.5 2.4 1.36 1.79 2.66 3.89 5.57 8.15 10.6 12.7 14.2 18.4 20.6656.8 2.2 1.23 1.80 2.57 3.49 4.85 7.04 10.2 11.6 13.0 15.9 17.8

726.9 2.0 1.06 1.51 2.19 3.36 4.32 6.37 8.41 10.3 11.5 15.0 16.8804.5 1.8 1.00 1.56 2.42 3.07 3.76 5.50 7.11 9.38 10.5 12.9 14.5890.3 1.6 .909 1.20 1.82 2.67 3.67 5.39 7.13 8.54 9.56 12.4 13.9985.3 1.5 .829 1.21 1.76 2.39 3.19 4.66 6.79 7.79 8.73 10.7 12.0

1090 1.3 .713 .961 1.25 1.80 2.78 4.37 5.56 7.40 8.29 8.80 9.861207 1.2 .637 .888 1.20 1.77 2.44 3.77 4.72 6.18 6.92 7.46 8.35

1170

215.4 5.4 3.00 4.13 6.05 8.92 12.3 18.1 24.5 27.9 31.2 40.1 44.9238.4 5.0 2.71 4.11 5.79 8.00 10.7 15.6 21.8 25.5 28.6 34.5 38.6263.8 4.4 2.45 3.42 4.93 7.96 10.4 15.3 19.0 23.1 25.9 32.5 36.4291.9 4.0 2.26 3.50 5.39 6.97 9.12 13.2 18.5 21.2 23.7 28.7 32.1

323.1 3.6 2.05 2.71 4.09 6.08 8.11 11.9 16.7 18.7 20.9 27.0 30.2357.5 3.2 1.86 2.71 3.93 5.52 7.07 10.3 14.8 17.1 19.1 23.2 26.0395.7 2.9 1.63 2.24 3.23 5.27 6.89 10.1 13.0 15.4 17.3 22.2 24.9437.9 2.7 1.48 2.25 3.12 4.62 6.00 8.69 12.6 14.1 15.8 19.3 21.6

484.6 2.4 1.33 1.85 2.63 4.03 5.40 7.90 11.1 12.5 14.0 18.2 20.4536.3 2.2 1.23 1.91 2.90 3.67 4.70 6.82 9.90 11.4 12.8 15.7 17.6593.5 2.0 1.11 1.47 2.18 3.19 4.58 6.68 8.78 10.4 11.6 15.1 16.9656.8 1.8 1.01 1.48 2.11 2.86 3.99 5.77 8.39 9.46 10.6 13.0 14.6

726.9 1.6 .872 1.24 1.80 2.75 3.55 5.23 6.89 8.41 9.42 12.3 13.8804.5 1.5 .820 1.28 1.98 2.52 3.09 4.51 5.84 7.70 8.62 10.6 11.9890.3 1.3 .745 .981 1.49 2.19 3.01 4.42 5.87 6.98 7.82 10.2 11.4985.3 1.2 .680 .991 1.44 1.96 2.62 3.82 5.58 6.38 7.14 8.79 9.84

1090 1.0 .585 .787 1.02 1.48 2.28 3.59 4.56 6.08 6.81 7.21 8.081207 1.0 .523 .728 .981 1.45 2.01 3.09 3.88 5.06 5.67 6.11 6.84

� Since thermal horsepower ratings of quadruple reduction drives exceed mechanical ratings, it is not necessary to check for thermal limitations. For High Speed Shaft speedshigher than 1750 rpm, contact Factory; below 580 rpm, reduce horsepower rating proportionately. Contact Factory for larger drive sizes.

Type YB4/Torque RatingsRatios 215.4 through 1207 Quadruple Reduction 1750 through 1170 rpm


HighSpeedShaftrpm

NominalRatio±5%

Approx.L.S.

Shaftrpm

DRIVE SIZE �

2050 2060 2070 2080 200 2100 2110 2120 2125 2130 2135

1750

215.4 8.1 33.4 44.5 67.8 100 140 200 259 310 347 462 517238.4 7.5 33.7 49.0 70.2 98.9 135 198 267 331 371 450 504263.6 6.6 32.9 46.0 67.7 109 146 201 253 316 354 445 498291.9 6.0 35.2 54.1 79.2 107 147 199 284 338 378 454 509

323.1 5.4 33.6 44.9 68.2 105 143 202 282 310 347 465 521357.5 5.0 34.1 49.6 71.0 107 137 200 286 331 371 458 513395.7 4.4 33.7 44.9 68.4 110 144 202 259 316 354 457 512437.9 4.0 34.2 49.9 71.6 107 138 199 288 338 379 462 517

484.6 3.6 33.2 46.4 68.3 106 144 202 286 310 347 470 526536.3 3.2 35.5 54.9 80.4 108 139 199 289 330 370 463 519593.5 2.9 33.8 45.1 68.8 103 145 203 264 316 354 467 523656.8 2.7 34.4 50.3 72.2 102 139 201 290 338 378 464 520

726.9 2.4 33.2 46.7 68.6 106 146 204 254 310 347 471 528804.5 2.2 35.5 55.3 81.2 109 140 201 248 331 371 466 522890.3 2.0 33.9 45.3 69.0 104 146 204 269 316 354 472 529905.3 1.8 34.8 50.6 72.9 103 141 202 294 338 378 465 521

1090 1.6 33.3 45.0 59.3 86.3 134 205 254 343 384 413 4621207 1.5 32.4 46.1 60.9 89.9 129 194 251 311 348 379 424

1430

215.4 6.6 33.5 44.7 68.0 100 141 200 276 310 347 463 519238.4 6.0 33.9 49.4 70.7 99.7 136 198 284 330 370 455 510263.6 5.4 33.0 46.2 67.8 110 146 201 256 316 354 450 504291.9 5.0 35.3 54.5 79.6 107 147 199 285 337 377 458 513

323.1 4.4 33.7 45.0 68.3 106 144 202 284 310 347 468 524357.5 4.0 34.2 50.0 71.5 108 138 200 288 330 370 462 517395.7 3.6 33.8 45.1 68.5 111 144 203 262 317 355 463 518437.9 3.2 34.4 50.1 71.9 108 139 201 290 337 377 463 518

484.6 2.9 33.2 46.5 68.4 106 145 203 286 311 348 471 527536.3 2.7 35.4 55.1 80.8 109 140 201 291 331 371 463 519593.5 2.4 33.9 45.3 68.9 103 146 204 266 316 354 471 528656.8 2.2 34.6 50.6 72.6 102 140 201 292 338 378 466 522

726.9 2.0 33.1 46.6 68.6 107 146 204 254 309 346 472 529804.5 1.8 35.6 55.5 81.6 110 141 202 250 329 369 467 523890.3 1.6 34.0 45.5 69.2 104 147 204 271 316 354 473 530905.3 1.5 34.9 51.0 73.0 103 141 202 295 338 378 468 524

1090 1.3 33.4 45.2 59.3 86.4 134 205 254 345 386 414 4641207 1.2 32.5 46.4 61.3 90.2 129 195 251 312 349 379 425

1170

215.4 5.4 33.5 44.9 68.2 101 143 201 281 309 346 466 522238.4 5.0 34.1 49.6 71.1 100 137 199 287 331 371 459 514263.6 4.4 33.1 46.3 68.1 110 147 201 259 316 354 456 511291.9 4.0 35.3 54.7 80.1 107 148 199 288 338 378 461 516

323.1 3.6 33.6 45.1 68.6 106 144 203 286 310 347 469 525357.5 3.2 34.4 50.2 71.9 108 139 201 290 331 371 463 518395.7 2.9 33.8 45.2 68.7 111 145 204 263 316 354 467 523437.9 2.7 34.6 50.4 72.3 108 139 201 292 337 377 464 520

484.6 2.4 33.4 46.6 68.5 107 146 204 287 309 346 471 527536.3 2.2 35.7 55.5 81.3 109 140 201 293 329 369 465 521593.5 2.0 33.8 45.5 69.0 104 146 204 269 315 353 472 529656.8 1.8 34.7 50.9 72.8 103 141 202 294 337 377 468 524

726.9 1.6 33.3 46.8 68.9 107 147 205 254 310 347 474 531804.5 1.5 35.7 55.7 81.6 110 141 202 251 331 371 469 525890.3 1.3 34.0 45.5 69.3 105 147 205 273 316 354 474 531905.3 1.2 35.0 51.1 73.0 103 142 203 297 338 378 469 525

1090 1.0 33.5 45.3 59.1 86.8 134 206 255 346 388 415 4651207 1.0 32.6 46.5 61.2 90.3 130 195 253 312 349 380 426

� Since thermal horsepower ratings of quadruple reduction drives exceed mechanical ratings, it is not necessary to check for thermal limitations. For High Speed Shaft speedshigher than 1750 rpm, contact Factory; below 580 rpm, use torques tor 580 rpm. Contact Factory for larger sizes.


Type YB4/Horsepower RatingsRatios 215.4 through 1207 Quadruple Reduction 870 through 580 rpm


HighSpeedShaftrpm

NominalRatio±5%

Approx.L.S.

Shaftrpm

DRIVE SIZE �

2050 2060 2070 2080 200 2100 2110 2120 2125 2130 2135

870

215.4 4.1 2.24 3.08 4.52 6.69 9.21 13.5 18.4 20.7 23.2 30.0 33.6238.4 3.8 2.03 3.08 4.34 6.00 8.03 11.7 16.3 19.0 21.3 25.8 28.9263.8 3.3 1.83 2.55 3.68 5.94 7.78 11.4 14.4 17.2 19.3 24.6 27.5291.9 3.0 1.69 2.62 4.03 5.20 6.81 9.89 13.9 15.7 17.6 21.4 24.0

323.1 2.7 1.53 2.02 3.05 4.54 6.08 8.87 12.5 13.8 15.5 20.2 22.6357.5 2.5 1.39 2.03 2.94 4.14 5.29 7.66 11.1 12.7 14.2 17.3 19.4395.7 2.2 1.21 1.67 2.41 3.93 5.16 7.51 9.83 11.5 12.9 16.7 18.7437.9 2.0 1.10 1.68 2.33 3.44 4.49 6.48 9.41 10.5 11.8 14.4 16.1

484.6 1.8 .991 1.38 1.96 3.00 4.04 5.89 8.28 9.29 10.4 13.7 15.3536.3 1.6 .914 1.43 2.16 2.75 3.52 5.09 7.41 8.53 9.55 11.7 13.1593.5 1.5 .830 1.09 1.63 2.39 3.42 4.98 6.60 7.72 8.65 11.3 12.6656.8 1.3 .757 1.10 1.58 2.14 2.98 4.30 6.28 7.05 7.90 9.73 10.9

726.9 1.2 .651 .924 1.34 2.05 2.65 3.90 5.14 6.26 7.01 9.20 10.3804.5 1.1 .611 .956 1.48 1.88 2.31 3.36 4.37 5.72 6.41 7.90 8.85890.3 1.0 .555 .731 1.11 1.63 2.25 3.30 4.40 5.20 5.82 7.62 8.53985.3 .90 .507 .740 1.08 1.46 1.96 2.84 4.17 4.74 5.31 6.55 7.34

1090 .80 .437 .586 .763 1.10 1.70 2.68 3.40 4.54 5.09 5.38 6.031207 .75 .390 .543 .731 1.08 1.50 2.31 2.89 3.78 4.23 4.55 5.10

720

215.4 3.3 1.86 2.55 3.75 5.56 7.66 11.2 15.3 17.1 19.2 24.9 27.9238.4 3.0 1.69 2.56 3.61 4.99 6.67 9.69 13.6 15.7 17.6 21.4 24.0263.8 2.7 1.52 2.11 3.05 4.93 6.45 9.50 12.0 14.3 16.0 20.5 23.0291.9 2.5 1.40 2.18 3.35 4.32 5.65 8.20 11.5 13.0 14.6 17.8 19.9

323.1 2.2 1.27 1.67 2.53 3.76 5.05 7.36 10.3 11.4 12.8 16.7 18.7357.5 2.0 1.16 1.68 2.44 3.44 4.40 6.35 9.23 10.5 11.8 14.4 16.1395.7 1.8 1.01 1.38 2.00 3.26 4.28 6.23 8.19 9.55 10.7 13.8 15.5431.9 1.6 .917 1.39 1.93 2.85 3.73 5.37 7.82 8.70 9.74 12.0 13.4

484.6 1.5 .821 1.14 1.62 2.49 3.35 4.88 6.87 7.71 8.64 11.3 12.7536.3 1.3 .757 1.18 1.80 2.28 2.92 4.22 6.15 7.06 7.91 9.73 10.9593.5 1.2 .687 .905 1.35 1.98 2.84 4.13 5.49 6.39 7.16 9.38 10.5656.8 1.1 .628 .915 1.31 1.78 2.47 3.57 5.21 5.84 6.54 8.04 9.01

726.9 1.0 .540 .766 1.11 1.70 2.20 3.23 4.26 5.18 5.80 7.62 8.53804.5 .90 .506 .792 1.23 1.56 1.92 2.79 3.63 4.74 5.31 6.55 7.34890.3 .80 .460 .606 .920 1.36 1.87 2.73 3.66 4.29 4.81 6.31 7.07985.3 .75 .421 .614 .895 1.21 1.62 2.36 3.46 3.93 4.40 5.43 6.08

1090 .65 .362 .486 .632 .912 1.41 2.22 2.82 3.77 4.22 4.46 4.991207 .60 .323 .451 .606 .898 1.24 1.92 2.40 3.13 3.50 3.78 4.23

580

215.4 2.7 1.50 2.06 3.03 4.50 6.21 9.06 12.4 13.8 15.5 20.1 22.5238.4 2.5 1.36 2.07 2.92 4.04 5.40 7.83 11.0 12.7 14.2 17.3 19.4263.8 2.2 1.22 1.71 2.46 3.98 5.21 7.67 9.76 11.5 12.9 16.7 18.7291.9 2.0 1.13 1.76 2.71 3.48 4.56 6.63 9.34 10.4 11.7 14.4 16.1

323.1 1.8 1.03 1.35 2.04 3.04 4.09 5.94 8.35 9.20 10.3 13.5 15.1357.5 1.6 .934 1.36 1.97 2.78 3.56 5.13 7.47 8.46 9.47 11.6 13.0395.7 1.5 .812 1.12 1.61 2.63 3.46 5.03 6.65 7.67 8.59 11.2 12.5437.9 1.3 .741 1.13 1.56 2.30 3.02 4.34 6.33 7.00 7.84 9.64 10.8

484.6 1.2 .662 .924 1.31 2.01 2.71 3.94 5.54 6.21 6.96 9.11 10.2536.3 1.1 .611 .956 1.45 1.84 2.36 3.40 4.98 5.69 6.37 7.85 8.79593.5 1.0 .554 .730 1.09 1.60 2.30 3.33 4.45 5.15 5.77 7.54 8.45656.8 .90 .507 .739 1.06 1.43 2.00 2.88 4.22 4.71 5.27 6.49 7.27

726.9 .80 .436 .618 .895 1.37 1.78 2.61 3.44 4.17 4.67 6.15 6.89804.5 .75 .408 .639 .993 1.26 1.55 2.25 2.93 3.82 4.28 5.29 5.92890.3 .65 .371 .488 .742 1.10 1.51 2.20 2.97 3.46 3.88 5.09 5.70985.3 .60 .340 .495 .722 .982 1.31 1.90 2.79 3.16 3.54 4.38 4.91

1090 .50 .292 .392 .510 .736 1.14 1.80 2.27 3.04 3.41 3.60 4.031207 .50 .261 .364 .488 .725 1.00 1.55 1.93 2.53 2.83 3.04 3.41

� Since thermal horsepower ratings of quadruple reduction drives exceed mechanical ratings, it is not necessary to check for thermal limitations. For High Speed Shaft speedhigher than 1750 rpm, contact Factory; below 580 rpm, reduce horsepower rating proportionately. Contact Factory for larger sizes.

Type YB4/Torque RatingsRatios 215.4 through 1207 Quadruple Reduction 870 through 580 rpm


HighSpeedShaftrpm

NominalRatio±5%

Approx.L.S.

Shaftrpm

DRIVE SIZE �

2050 2060 2070 2080 2090 2100 2110 2120 2125 2130 2135

870

215.4 4.1 33.7 45.0 68.5 102 144 202 285 309 346 469 525238.4 3.8 34.4 50.0 71.7 101 138 200 288 331 371 462 517263.8 3.3 33.2 46.5 68.3 111 147 202 264 317 355 463 519291.9 3.0 35.5 55.1 80.5 108 148 200 291 338 378 463 519

323.1 2.7 33.8 45.3 68.8 106 145 203 288 309 346 472 529357.5 2.5 34.6 50.5 72.3 109 140 201 292 331 371 464 520395.7 2.2 33.8 45.3 68.9 111 146 204 268 317 355 472 529437.9 2.0 34.6 50.6 72.6 108 140 201 293 338 379 465 521

484.6 1.8 33.4 46.7 68.7 107 147 204 288 309 346 475 532536.3 1.6 35.7 55.8 81.5 110 141 202 295 331 371 466 522593.5 1.5 34.0 45.4 69.4 104 147 204 272 316 354 474 531656.8 1.3 35.0 50.8 73.3 103 141 202 296 338 378 470 526

726.9 1.2 33.4 46.9 69.0 107 148 205 255 310 347 476 533804.5 1.1 35.8 56.0 82.0 110 142 203 252 331 371 469 525890.3 1.0 34.1 45.6 69.4 105 148 206 275 317 355 477 534985.3 .90 35.1 51.3 73.6 104 143 203 298 338 378 470 526

1090 .80 33.6 45.3 59.5 86.8 135 207 256 348 390 417 4671207 .75 32.7 46.6 61.3 90.4 131 196 253 313 350 381 427

720

215.4 3.3 33.8 45.0 68.6 103 144 202 286 309 346 471 527238.4 3.0 34.6 50.2 72.1 102 139 201 290 331 371 463 519263.8 2.7 33.3 46.5 68.4 111 148 203 265 317 355 469 525291.9 2.5 35.6 55.4 80.9 108 149 201 291 338 379 464 520

323.1 2.2 33.9 45.2 68.9 106 146 204 287 309 346 471 528357.5 2.0 34.9 50.5 72.5 109 140 202 293 332 372 465 521395.7 1.8 34.1 45.2 69.1 111 146 204 270 318 356 473 530437.9 1.6 34.8 50.6 72.7 108 141 202 294 338 378 468 524

484.6 1.5 33.5 46.6 68.6 107 147 204 289 310 347 477 534536.3 1.3 35.7 55.7 82.0 110 141 203 296 331 371 469 525593.5 1.2 34.0 45.5 69.4 105 147 205 273 316 354 477 534656.8 1.1 35.0 51.1 73.5 104 142 203 297 338 378 469 525

726.9 1.0 33.5 47.0 69.0 107 148 205 255 310 347 477 534804.5 .90 35.8 56.0 82.3 111 143 203 253 331 371 470 526890.3 .80 34.1 45.7 69.5 106 149 206 277 316 354 478 535985.3 .75 35.2 51.4 73.7 104 142 204 299 338 378 471 527

1090 .65 33.7 45.4 59.5 86.9 135 207 256 348 390 417 4671207 .60 32.7 46.8 61.4 90.8 131 197 254 313 350 382 428

580

215.4 2.7 33.8 45.1 68.9 103 145 203 288 310 347 471 527238.4 2.5 34.5 50.4 72.4 102 140 201 292 331 371 465 521263.8 2.2 33.2 46.7 68.5 111 148 204 268 318 356 473 530291.9 2.0 35.6 55.5 81.2 108 149 202 293 337 377 467 523

323.1 1.8 34.1 45.4 69.0 107 147 204 288 308 345 473 530357.5 1.6 34.8 50.8 72.7 110 141 202 295 331 371 466 522395.7 1.5 34.0 45.6 69.0 112 147 205 272 316 354 473 530437.9 1.3 34.9 51.1 73.0 108 142 202 296 338 378 469 525

484.6 1.2 33.5 46.9 68.8 107 148 205 289 310 347 475 532536.3 1.1 35.8 56.0 82.0 110 142 203 297 331 371 469 525593.5 1.0 34.1 45.6 69.6 105 148 205 275 317 355 477 534656.8 .90 35.1 51.2 73.8 104 142 203 298 338 378 470 526

726.9 .80 33.6 47.0 69.1 107 149 206 256 310 347 478 535804.5 .75 35.8 56.1 82.5 111 143 203 254 331 371 471 527890.3 .65 34.2 45.7 69.6 106 149 206 279 317 355 478 535985.3 .60 35.3 51.4 73.8 104 143 203 299 338 378 471 528

1090 .50 33.7 45.5 59.6 87.1 136 209 256 349 391 418 4681207 .50 32.8 46.9 61.4 91.0 131 198 254 313 351 382 428

� Since thermal horsepower ratings of quadruple reduction drives exceed mechanical ratings, it is not necessary to check for thermal limitations. For High Speed Shaft speedshigher than 750 rpm, contact Factory; below 580 rpm, use torques tor 580 rpm. Contact Factory for larger sizes.


Type GHB1Exact Ratios � Single Reduction

Type YB2Exact Ratios � Double Reduction(Triple Reduction Where Screened)


NominalRatio

�

DRIVE SIZE

2050 2060 2070 2080 2090 2100 2110 2120

1.50 1.481 1.481 1.481 1.481 1.481 1.481 1.481 1.4841.84 1.810 1.840 1.864 1.840 1.864 1.840 1.852 1.8622.25 2.261 2.261 2.261 2.261 2.261 2.261 2.261 2.2612.76 2.733 2.765 2.765 2.733 2.765 2.765 2.737 2.750

3.38 3.308 3.308 3.308 3.368 3.368 3.357 3.357 3.3684.13 4.071 4.071 4.071 4.071 4.071 4.071 4.071 4.1335.06 5.083 5.083 5.083 5.083 5.059 5.083 5.083 5.083

� Except where noted with an asterisk (�), exact ratios are within ±3% of the nominal ratios.

NominalRatio

�

DRIVE SIZE

2050 2060 2070 2080 2090 2100 211021202125

21302135

21402145

21502155

21602165

21702175

21802185

21902195

5.06 4.992 5.139 5.167 5.078 5.144 5.109 5.300 � 5.122 5.099 5.107 5.021 5.049 5.082 5.034 5.1655.60 5.563 5.577 5.711 5.678 5.731 5.603 5.764 5.670 5.562 5.707 5.691 5.824 5.846 � 5.761 5.836 �

6.20 6.225 6.221 6.278 6.105 6.478 � 6.222 6.323 6.152 6.317 6.283 6.287 6.390 6.378 6.289 6.2216.86 6.845 6.973 6.806 6.716 6.802 6.958 7.001 6.878 7.012 6.922 6.739 6.949 7.096 7.192 � 7.120

7.59 7.583 7.462 7.632 7.457 7.869 7.760 7.843 7.701 7.572 7.793 7.520 7.595 7.608 7.605 7.6498.40 8.233 8.188 8.533 8.442 8.332 8.241 8.556 8.499 8.357 8.502 8.444 8.501 8.549 8.653 8.6239.30 9.530 9.169 9.259 9.162 9.546 9.362 9.598 9.108 9.284 9.537 9.340 9.399 9.590 9.610 9.533

10.29 10.01 10.06 10.35 10.37 10.11 10.13 10.37 10.06 10.07 10.23 10.02 10.32 10.19 10.25 10.20

11.39 11.45 11.21 11.32 11.08 11.54 11.59 11.85 � 11.75 11.53 11.55 11.60 11.41 11.18 11.03 11.6412.61 12.44 12.53 12.66 12.54 12.22 12.30 12.46 12.64 12.37 12.56 12.24 12.85 12.56 12.55 12.4413.95 14.40 13.41 13.55 13.65 14.03 13.98 14.24 13.55 14.17 14.09 14.17 13.69 14.09 13.94 13.8315.44 15.11 15.43 15.15 15.46 15.06 15.12 15.38 14.96 15.12 15.12 15.34 15.63 15.34 15.37 15.27

17.09 17.06 16.51 16.67 16.50 17.29 17.06 17.58 17.47 17.33 17.06 17.15 16.65 17.21 17.07 16.8818.91 18.52 18.12 � 18.57 18.68 18.20 18.12 � 18.69 18.81 18.37 18.69 18.57 18.87 18.29 18.20 18.06 �

20.93 21.44 20.90 20.07 � 20.60 20.90 20.58 20.97 20.15 21.04 20.97 21.04 20.86 21.24 21.09 20.8223.16 22.51 22.27 23.28 23.32 22.73 22.27 22.65 22.26 22.27 22.50 22.03 � 23.21 22.57 22.48 22.26

25.63 25.37 24.74 25.05 26.20 26.09 25.58 25.88 25.99 25.51 25.39 25.51 25.66 25.47 25.28 25.4228.36 28.21 27.63 28.28 28.68 28.68 27.67 27.23 27.96 27.54 27.23 27.63 28.89 27.58 28.50 27.16 �

31.39 30.69 30.67 30.84 31.67 31.67 31.70 31.70 30.24 29.77 � 31.70 31.86 30.78 31.93 31.32 31.77� Except where noted with an asterisk (�), exact ratios are within ±4% of the nominal ratios.

Type YB3 Exact Ratios � Triple Reduction

Type YB4 Exact Ratios � Quadruple Reduction


NominalRatio

�

DRIVE SIZE

2050 2060 2070 2080 2090 2100 211021202125

21302135

21402145

21502155

21602165

21702175

21802185

21902195

34.74 34.34 33.01 � 34.56 35.11 34.47 32.87 � 33.42 35.25 32.84 � 36.12 35.39 35.80 35.35 35.02 35.9238.44 39.75 38.08 37.20 38.98 39.58 38.45 38.20 38.74 37.62 40.52 � 39.14 39.59 39.66 38.89 39.7142.54 41.73 40.58 � 41.98 44.13 43.51 41.60 42.04 41.66 40.61 � 43.48 42.00 44.58 � 42.15 41.47 42.4747.08 47.40 45.08 � 46.06 46.11 49.75 47.75 48.05 46.62 46.73 49.06 � 48.63 48.45 47.56 47.68 48.49

52.11 51.47 50.63 51.98 52.54 51.79 51.67 51.00 50.61 50.44 52.87 50.67 54.56 � 49.85 � 50.84 51.9857.66 59.58 58.41 55.68 58.34 59.47 58.67 58.29 59.11 57.42 59.65 58.67 58.12 60.50 � 59.23 58.8363.82 62.55 62.24 62.84 62.27 65.37 63.49 62.37 63.07 61.98 63.78 62.70 67.34 � 60.91 � 62.47 62.9370.62 71.95 69.14 68.57 69.02 74.75 � 67.82 71.28 71.14 69.42 71.96 72.72 71.74 70.75 71.00 71.82

78.16 78.16 75.88 77.39 78.27 76.27 73.39 � 74.62 � 77.63 74.93 � 77.54 75.64 80.93 78.56 75.66 78.6586.50 90.42 � 87.54 82.94 � 83.52 87.58 84.06 85.28 87.00 88.28 87.49 87.59 86.22 83.67 86.06 86.9595.73 94.94 98.08 93.61 97.72 96.27 92.89 91.85 � 93.01 95.30 93.83 92.33 99.90 � 99.06 92.76 96.61

105.9 107.0 105.0 102.1 102.8 110.1 105.7 105.0 104.1 106.7 106.2 108.6 106.4 103.8 105.5 106.8

117.2 114.7 115.2 114.7 115.6 121.0 114.3 114.7 111.9 114.8 115.5 111.4 � 119.2 119.3 118.0 117.0129.7 132.8 132.9 123.5 � 128.4 130.2 125.1 131.1 132.9 131.5 130.3 129.0 127.0 133.9 131.1 129.4143.6 139.5 141.6 139.4 145.3 143.1 142.8 145.2 137.0 � 143.3 140.2 138.1 147.1 142.3 139.7 138.4158.9 157.1 157.3 152.0 � 163.2 158.1 156.2 165.9 � 160.0 164.2 158.2 159.9 156.7 160.6 163.6 158.0

175.9 174.7 175.6 173.8 178.7 172.1 169.0 174.5 � 172.0 173.3 169.6 173.1 179.6 173.8 174.4 168.7 �

194.6 190.1 195.0 187.1 197.3 189.3 193.6 196.4 196.9 198.5 197.5 188.4 193.3 188.9 196.2 191.2� Except where noted with an asterisk (�), extra ratios are within±4% of the nominal ratios.

NominalRatio

�

DRIVE SIZE

2050 2060 2070 2080 2090 2100 211021202125

21302135

215.4 207.5 201.7 � 209.2 210.8 215.5 206.4 213.6 206.2 215.7238.4 233.8 224.1 � 228.2 232.7 238.0 236.5 244.1 240.8 247.1263.8 250.7 251.7 256.4 257.3 261.8 244.4 � 252.8 253.8 260.8291.9 290.2 290.3 276.0 � 285.6 300.6 279.9 288.9 296.4 298.8

323.1 304.7 � 309.4 311.5 323.4 330.4 316.6 318.0 308.6 322.9357.5 343.4 343.7 339.7 363.3 364.9 362.7 363.4 360.4 369.9395.7 385.3 374.7 � 394.7 390.5 390.9 374.8 � 376.4 379.9 390.4437.9 434.2 416.2 430.5 433.5 431.6 429.4 430.2 443.6 447.2

484.6 465.7 467.5 483.8 490.8 501.5 478.9 480.9 458.9 � 480.2536.3 539.1 539.3 520.7 551.3 553.8 548.6 549.6 535.9 550.0593.5 566.0 574.7 587.7 603.7 593.3 566.9 569.3 565.8 581.5656.8 637.8 638.4 641.0 666.6 655.1 649.4 650.6 660.8 666.2

726.9 709.2 700.6 710.6 721.0 769.2 � 726.8 684.5 � 683.5 � 715.2804.5 808.0 808.2 764.9 809.9 849.3 � 832.6 796.9 798.3 819.3890.3 848.3 861.3 863.3 886.7 910.0 860.4 864.1 841.3 � 864.7985.3 955.9 956.8 941.5 979.1 1005 985.6 987.5 982.6 990.5

1090 1063 1068 1077 1089 1094 1067 1039 1057 10691207 1157 1186 1159 1156 1203 1174 1209 1143 � 1156

� Except where noted with an asterisk (�), extra ratios are within±5% of the nominal ratios.

Type YB2/Thermal Horsepower Ratings �

Ratios 5.06 through 31.39 Double and Triple Reduction 1750 through 720 rpm

This is actual hp (without service factor) that the drive will transmit continually for three hours or more without overheating.


HighSpeed

Shaft rpm

NominalRatio�4%

Approx.L.S. Shaft

rpm

DRIVE SIZE

2050 2060 2070 2080 2090 2100 211021202125

21302135

21402145

21502155

21602165

21702175

21802185

21902195

1750

5.06 350 33 42 57 66 85 109 133 161 190 2336.20 280 33 43 58 67 86 110 134 163 192 2357.59 230 34 44 59 69 88 113 137 167 196 2409.30 190 35 45 60 70 90 115 140 170 200 245

11.39 155 36 47 62 73 94 121 146 177 208 255 . . . . . . 38513.95 125 38 49 65 76 97 124 151 184 216 265 313 . . . 40017.09 100 39 50 66 77 99 127 154 187 220 270 319 36920.93 84 . . . 52 70 81 104 133 162 197 232 284 336 389

25.63 68 . . . . . . . . . 83 107 137 167 202 238 292 345 39931.39 56 . . . . . . . . . . . . . . . 140 170 207 244 299 354 409

1430

5.06 280 43 55 79 86 110 137 167 202 238 292 357 4006.20 230 44 56 82 88 112 140 171 207 244 298 366 4107.59 190 45 58 85 90 115 144 175 212 248 309 372 4209.30 155 46 59 86 92 118 151 183 223 262 321 380 439

11.39 125 48 62 88 96 123 158 192 233 274 336 397 459 507 55113.95 100 . . . 64 91 99 128 163 199 241 284 348 412 476 525 571 63217.09 84 . . . . . . . . . 104 134 171 209 253 298 365 432 49920.93 68 . . . . . . . . . . . . . . . 178 217 264 310 380 450 519

25.63 56 . . . . . . . . . . . . . . . . . . . . . . . . 322 394 467 53931.39 45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 490 566

1170

5.06 230 64 82 111 128 166 212 258 312 368 451 534 616 681 7406.20 190 65 83 112 130 168 214 261 317 372 455 540 623 688 7487.59 155 66 85 114 132 170 218 265 321 380 463 548 633 698 7609.30 125 . . . 86 115 134 173 221 269 326 384 470 557 643 710 772

11.39 100 . . . . . . . . . 139 178 228 277 337 396 485 574 663 733 79613.95 84 . . . . . . . . . . . . . . . 230 280 340 400 490 580 670 740 804 89017.09 68 . . . . . . . . . . . . . . . . . . . . . . . . 410 502 595 68720.93 56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 609 700

25.63 45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 716

870

5.06 175 . . . . . . . . . . . . . . . . . . . . . 484 590 700 830 955 1058 1149 12726.20 140 . . . . . . . . . . . . . . . . . . . . . 492 611 713 844 971 1077 1169 12957.59 115 . . . . . . . . . . . . . . . . . . . . . . . . 619 730 864 995 1103 1198 13269.30 95 . . . . . . . . . . . . . . . . . . . . . . . . . . . 747 885 1022 1129 1226 1357

11.39 77 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1049 1158 1258 139313.95 62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1164 1286 1424

720

5.06 140 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1358 1496 1624 17856.20 115 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1533 1664 18307.59 95 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1697 18669.30 77 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1726 1874

11.39 62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1933� See Page 28 for increased thermal capacity with Falk™ cooling fans. Thermal hp values are listed only if they are less than the mechanical hp and are based on an ambient

temperature of 100°F (38°C). Refer to the bottom of this page for Temperature Factors for other ambient temperatures. Thermal horsepower ratings for drives with mounting levelat bottom (Type YBN) are approximately 10% higher. For thermal HP ratings of ratios not shown, interpolate between the nearest two ratios.

Thermal Rating FactorsThermal horsepower ratings catalogued on pages 26 & 27 arebased on a 100°F (38°C) ambient temperature at sea level. Forother conditions, the thermal horsepower rating may be multipliedby the factors shown in the tables at right. Where no thermalhorsepower ratings are shown in the tables, refer to Factory forselections at ambient above 100° F (38°C) and altitudes abovesea level.

Temperature Factors Altitude Factors

AmbientTemperature

Factor w/o Aux.Cooling or w/Fan � Altitude (ft) Factor

50°F(10°C)60°F(16°C)70°F (21°C80°F (27°C)

1.391.321.251.17

02,5005,0007,500

1.00.95.90.85

90°F (32°C100°F (38°C)110°F (43°C)120°F (49°C)

1.091.00

.91

.81

10,00012,50015,00017,500

.81

.76

.72

.68� Factors tor other ambient temperatures can

be interpolated.

Type GHB1/Thermal Horsepower Ratings �

Ratios 1.50 through 5.06 Single Reduction 1750 through 580 rpm



HighSpeedShaftrpm

Nominal

Ratio�3%

Approx.L.S.

Shaftrpm

DRIVE SIZE

2050 2060 2070 2080 2090 2100 2110 2120

1750

1.50 1170 30.2 38.6 49.4 67.5 93.11.84 950 31.2 39.9 51.1 69.8 97.0 1322.25 780 31.9 40.8 52.3 71.5 99.0 135 1792.76 640 32.6 41.8 53.5 73.1 101 139 184 218

3.38 520 33.5 42.8 54.9 75.0 104 143 192 2304.13 420 39.0 47.5 59.7 81.5 113 158 215 2585.06 350 41.0 49.6 65.1 88.8 120 168 227 275

1430

1.50 950 39.2 48.6 64.4 87.9 123 1701.84 780 39.8 49.3 65.2 89.0 125 173 2392.25 640 40.4 50.1 66.2 90.7 127 177 244 2892.76 520 43.8 51.6 67.8 92.6 130 181 248 286

3.38 420 45.9 53.4 72.6 94.6 133 186 253 3054.13 350 . . . 54.5 74.1 97.0 139 196 270 3265.06 280 . . . . . . 78.7 104 147 205 284 343

1170

1.50 780 49.4 63.1 80.9 111 155 215 2981.84 640 49.8 63.7 81.7 112 157 217 302 3682.25 520 52.5 66.6 82.4 113 159 219 306 3722.76 420 . . . 68.3 84.5 114 161 225 310 377

3.38 350 . . . 70.6 87.0 116 164 230 316 3874.13 280 . . . . . . . . . 118 165 235 325 4005.06 230 . . . . . . . . . 120 173 240 337 413

HighSpeedShaftrpm

NominalRatios�3%

Approx.L.S.

Shaftrpm

DRIVE SIZE

2060 2070 2080 2090 2100 2110 2120

870

1.50 580 84.6 . . . 154 210 250 407 5031.84 470 88.3 . . . 154 212 253 411 5082.25 390 . . . . . . 154 213 255 415 5132.76 320 . . . . . . . . . 215 259 421 520

3.38 260 . . . . . . . . . . . . 263 427 5274.13 210 . . . . . . . . . . . . 294 436 5375.06 175 . . . . . . . . . . . . . . . . . . 538

720

1.50 480 . . . . . . . . . 254 349 486 6021.84 390 . . . . . . . . . 264 352 491 6082.25 320 . . . . . . . . . 264 353 496 6142.76 260 . . . . . . . . . . . . 353 496 620

3.38 210 . . . . . . . . . . . . . . . . . . 6214.13 175 . . . . . . . . . . . . . . . . . . 626

580

1.50 390 . . . . . . . . . 285 405 573 7141.84 320 . . . . . . . . . . . . 405 574 7212.25 260 . . . . . . . . . . . . 405 574 7252.76 210 . . . . . . . . . . . . . . . . . . 725

3.38 175 . . . . . . . . . . . . . . . . . . 725

� See Page 28 for increased thermal capacity with Falk™ cooling fans. Thermal hp values are listed only if they are less than the mechanical hp and are based on an ambienttemperature of 100°F (38°C). Refer to the bottom of Page 26 for Temperature Factors for other ambient temperatures. For thermal HP ratings of ratios not shown, interpolatebetween the nearest two ratios.

Type YB3/Thermal Horsepower Ratings �

Ratios 17.09 through 105.9 Double and Triple Reduction 1750 through 870rpm


HighSpeedShaftrpm

NominalRatio±4%

Approx.L.S. Shaft

rpm 2050 2060 2070 2080 2090 2100 211021202125

21302135

21402145

21502155

21602165

21702175

21802185

21902195

1750

17.09 100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40720.93 84 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42925.63 68 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44031.39 56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 451

38.44 45 . . . . . . . . . . . . . . . . . . 179 . . . 250 306 363 419 463 503 56647.08 37 . . . . . . . . . . . . . . . . . . . . . . . . 256 322 377 436 481 523 57957.66 30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 461 499 553 59770.62 25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 502 557 602

86.50 20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 561 606105.9 16.5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 610

1430

17.09 84 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 551 599 66320.93 68 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 574 623 69025.63 56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 596 647 71631.39 45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 625 679 752

38.44 37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 651 708 78347.08 30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 716 79257.66 25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 802

1170

17.09 68 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 759 824 91220.93 56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 777 844 93525.63 45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 792 860 95231.39 37 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 884 979

38.44 30 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 992

870 17.09 50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1319 1460

� See Page 28 for increased thermal capacity with Falk cooling fans. Thermal hp values are listed only if they are less than the mechanical hp and are based on an ambienttemperature of 100°F (38°C). Refer to the bottom of Page 26 for Temperature Factors for other ambient temperatures. Thermal horsepower ratings for drives with mounting levelat bottom (Type YBN) are approximately 10% higher. For thermal HP ratings of ratios not shown, interpolate between the nearest two ratios.

Cooling Fans For Type YB DrivesFor fan cooled drives, multiply the thermal horsepowerratings catalogued on Pages 26 and 27 by the followingconvenient multipliers:

2.0 for Sizes 2050 thru 2120 GHB1

2.0 for Sizes 2050 thru 2155 YB2




Engineering 247-140 lists exact thermal horsepower ratingsfor drives equipped with fan.

Because of the configuration of the fan assembly around thehigh speed shaft, a motor bracket cannot be installed whena fan is used.

As noted on Page 4, thermal horsepower is the actual horsepower(without Service Factor) that a gear drive will transmit continuallyfor three hours or more without overheating. If a drive creates heatfaster than it can be dissipated, severe damage may occur.

Falk Cooling Fans provide a simple and inexpensive way to utilizethe mechanical rating of gear drives by lowering operatingtemperatures, thus increasing thermal horsepower capacity. Coolingfans have been successfully used on electric motors and otherrelated machinery for many years. They have been used since 1960on thousands of Falk gear drives applications such as paper mills,desert overland conveyors, steel mills, etc. Cooling Fans eliminatethe need for water or oil cooling, pumps and external piping.

Falk Pump and Cooler selections provide for thermal capacitiesbeyond the range of fan cooled drives, refer to Selection Guide131-310 for pump and cooler selections, or Selection Guide131-315 for air-to-oil cooler selections.

Application Benefits

Low initial cost and upkeep — In addition to low initial cost andnegligible maintenance, cooling fans eliminate the need toprovide liquid cooling and piping to and from the drive.

Effects of Speed Variation on Splash LubricationGeneral Information

When selecting drives for multi-speed or variable speed applications,determine the speed which develops the greatest torque and selectthe drives on this basis. If the speed is not listed in the selection table,use the next lower speed. Gear drives offered in this selection guideare assembled with a variety of standard internal lubricationcomponents such as oil pans, wipers, dams and extra oil troughs toensure proper splash lubrication. In addition, different oil levels arenecessary for various sizes, speeds and ratios. Consequently, tooperate an existing drive at different speeds from those shown on thenameplate, full application and nameplate information must bereferred to Factory for review of the lubrication system.

Single Speed Applications

These drives are designed to operate with splash lubrication onany single speed application and any ratio shown in this selectionguide unless otherwise noted. It is essential that all orders indicatethe desired operating speed and ratio so that the proper internaloil distribution accessories can be supplied for the specific speed.

Variable or Multi-speed Applications

All variable or multi-speed applications will be referred to theFactory to specify lubrication components for adequate lubricationat the slowest speed, without excessive heating or churning at thehighest speed. It is essential that all orders indicate minimum andmaximum speeds, as well as the speed duration cycles.

High efficiency — Less than one quarter of one per centcatalogued horsepower rating required to drive the fans.

Air-velocity — The fan design is such that the measurable airvelocity is LESS than the windage created by the low speed shaftcoupling.

Built-in safety — Small openings in the fan guards and two pieceexpanded metal grills on the inside of the guards protectoperators.

Coupling guard provisions — Four pads are provided on thefan guards so expanded metal coupling guards can be bolteddirectly to the fan guards.

Simple Disassembly — All fan parts can be added or removedwithout dismantling the gear drive. Split fan hubs slide over theshaft ends; split fan guards lift off.

Choice of seals — Grease-purged type seals can be used on fancooled drives.

Sound level — The sound level at 1750 rpm is about the sameas that from fans on totally enclosed, fan cooled driving motors.

When the speeds of variable or multi-speed applications are asfollows, a separate motor-driven oil pump (at an extra charge)may be required.

Single Reduction Drives . . . Refer application details to theFactory when

a) the high speed shaft minimum speed is under 400 rpm and/or

b) the low speed shaft minimum speed is under 50 rpm.

Double and Triple Reduction Drives . . . Refer applicationdetails to the Factory when the low speed shaft rpm is as follows:

Quadruple Reduction Drives can operate at any variable ormultiple speeds within the catalogued speed ranges withoutmodification.

Other speeds do not require an oil pump for adequate lubricationat variable speeds, unless a pump is needed for another purpose.


Low Speed Shaft RPMOil Pump Required

Minimum Maximum

0-49 50+ Yes0-29 30+ Yes

Calculate High Speed Shaft Overhung LoadOverhung Load =

126,000 x hp x Fc x L

Pitch Dia x r

f

pm

Fc = Load Connection FactorSprocket � · · · · · · · · · · · · · · · · · · · · · · · 1.00Machined Pinion Gear � · · · · · · · · · · · · · 1.25Synchronous(Timing)Belt · · · · · · · · · · · · · 1.30V-Belt · · · · · · · · · · · · · · · · · · · · · · · · · · 1.50Flat Belt · · · · · · · · · · · · · · · · · · · · · · · · · 2.50

Lf = Load Location FactorL.S.S. - See table on next pageH.S.S - See instructions below.

� Refer all multiple chain sprocket and pinionmounted applications to Factory for deflectionanalysis.

Types YB & YBT Double Reduction

High Speed Shaft overhung load ratings � — PoundsFor loads applied one shaft diameter from seal cage and speeds of 1170 rpm or lower...


DISTANCE

CENTER LINEOF LOAD

SEALCAGE

High speed shaft overhung load ratings published below arefor normal conditions where the center line of the load is one shaftdiameter from the seal cage, and for speeds of 1170 rpm orlower. Where the center line of the load is one shaft diameter fromthe seal cage or closer, calculate the high speed shaft overhungload using Lf = I in the formula above. This formula employs thetransmitted horsepower, without service factor, providing theoverloads, starting loads, and brake capacities do not exceed theamounts listed in GEAR DRIVE RATINGS on Page 4. Check theresult against the rating in the table below. Refer the application tothe Factory if the calculated load (using Lf = I ) for any of theseconditions exceeds the value published below, or if the load is

HighSpeed

Shaft rpm

AGMARatio�4%

Approx.L.S. Shaft

rpm

DRIVE SIZE

2050 2060 2070 2080 2090 2100 211021202125

21302135

21402145

21502155

21602165

21702175

21802185

21902195

1750

5.06 230 0 150 490 960 770 0 0 0 0 0 0 0 0 06.20 190 0 380 490 1200 770 0 0 0 0 0 0 4000 1610 07.59 155 510 800 490 1200 770 930 0 370 0 2040 0 4000 4600 0

9.30 125 700 800 740 1200 200 1700 850 1170 850 3000 0 4000 4600 469011.39 100 630 800 600 1200 0 1110 2000 2300 2600 3000 3400 4000 4600 013.95 84 700 470 570 1200 1400 1700 720 1940 2600 3000 3400 4000 4600 5400 3940

11.0920.93

6856

700700

800800

10001000

12001200

14001400

17001700

20001500

23002300

26002600

30003000

34002080

40004000

25.63 45 700 800 1000 1200 1400 1700 2000 2300 2600 3000 3400 400031.39 37 700 800 1000 1200 1400 1700 2000 2300 2600 3000 3350 4000

870

5.06 115 0 700 1000 1200 1400 0 0 0 0 0 0 720 2530 0 06.20 140 350 700 1000 1200 1400 0 0 0 0 0 0 4000 4600 0 07.59 115 700 800 1000 1200 1400 1700 0 1520 0 2220 0 4000 4600 1260 27609.30 95 700 800 1000 1200 640 1700 1800 2300 2280 3000 0 4000 4600 5120 3890

11.39 77 700 800 1000 1200 450 1700 2000 2300 2600 3000 3400 4000 4600 3460 640013.95 62 700 800 1000 1200 1400 1700 1690 2300 2600 3000 3400 4000 4600 5400 432017.09 50 700 800 1000 1200 1400 1700 2000 2300 2600 3000 3400 4000

720

5.06 140 0 800 1000 1200 1400 0 0 0 0 0 0 2640 4600 0 06.20 115 570 800 1000 1200 1400 0 0 0 0 0 0 4000 4600 0 07.59 95 700 800 1000 1200 1400 1700 0 2300 0 3000 1250 4000 4600 3570 59709.30 77 700 800 1000 1200 1070 1700 2000 2300 2600 3000 210 4000 4600 5400 4090

11.39 62 700 800 1000 1200 860 1700 2000 2300 2600 3000 3400 4000 4600 5400 640013.95 50 700 800 1000 1200 1400 1700 2000 2300 2600 3000 3400 4000 4600 5400 4550

580

5.06 115 80 800 1000 1200 1400 0 0 0 0 910 0 4000 4600 2870 06.20 95 700 800 1000 1200 1400 500 0 0 0 910 0 4000 4600 2870 07.59 77 700 800 1000 1200 1400 1700 750 2300 230 3000 3190 4000 4600 5400 64009.30 62 700 800 1000 1200 1400 1700 2000 2300 2600 3000 2220 4000 4600 5400 5700

11.39 50 700 800 1000 1200 1400 1700 2000 2300 2600 3000 3400 4000 4600 5400 6400� In each High Speed Shaft rpm section, the last overhung load value applies to all of the higher ratios of that gear reduction. Published ratings are based on a combination of the

most unfavorable conditions of loading. For higher ratings, refer full data to Factory. For OHL values of ratios or H.S. Shaft speeds not shown, use the OHL value of the nextlowest ratio or next highest H.S. Shaft rpm.

TRIPLE AND QUADRUPLE REDUCTION. . .NEXT PAGE

applied at a distance greater than one shaft diameter from theseal cage.

Consult Factory for Higher Overhung Load Ratings — Inmany cases, capacity in excess of that published is available.Published ratings are based on a combination of the mostunfavorable conditions of rotation, speed, hand of drive, directionof applied load, and drive loading.

High speed shaft overhung load example — A 15 hp, 1750rpm motor with a 4 inch pitch diameter sheave is V-Belt connectedto a 2070YB2 gear drive, which has a standard AGMA ratio of31.39:1. A 12 inch pitch diameter sheave is mounted on the drivehigh speed shaft 2 inches (one shaft diameter) from the seal cage.Calculate the high speed shaft rpm and overhung load as follows:

Drive high speed shaft rpm =4

12x 1750 = 583 rpm

Using the overhang load formula from colum one,

Overhung load =126,000 x 15 x 1.50 x 1.00

12 x 583= 405 pounds.

From the table below, the high speed shaft overhung loadcapacity for a 2070YB2 drive with 31.39:1 ratio is 1000 pounds.The actual load is less than the published capacity and issatisfactory. If the actual load should exceed the publishedcapacity or if the center line of the load is more than one shaftdiameter from the seal cage, refer full details to the Factory.

Contact Factory for higher overhung load ratings

Types YB & YBT Triple & Quadruple Reduction

High Speed Shaft Overhung Load Ratings � — PoundsFor loads applied one shaft diameter for seal cage and speeds of 1170 rpm or lower...

Contact Falk for higher overhung load ratings


Calculate low speed shaft overhung loadStandard low speed bearings in Types GHB and YB drives willaccommodate most overhung loads. Where extra capacity isrequired, the Type YBT drives are offered with higher capacitybearings to permit customizing of standard drives to manyapplications at only a nominal extra charge. However, if anoutboard bearing is used, the overhung load ratings of GHB andYB drives can be increased by 80%.

Locate the center of the load as close to the drive seal cage aspractical to minimize the overhung load and increase bearing life.Calculate the low speed shaft overhung load using the formulaand the Fc, value from the preceding page. This formula employsthe transmitted horsepower, without service factor, providing theoverloads, starting loads, and brake capacities do not exceed theamounts listed in GEAR DRIVE RATINGS on Page 4. Refer theapplication to the Factory if the calculated load exceeds the valuepublished in the table above. The Lf load location factors aretabulated on Page 31 and are based on the distance from thecenter line of the load to the drive seal cage.

Low speed shaft overhung load example — A belt conveyorrequiring 115 hp is driven by a 2110YB2 drive with an inputspeed of 1750 rpm and low speed shaft output of 68 rpm. A 10inch pitch diameter, single chain sprocket is mounted on the drivelow speed shaft with the center line of the load 5.5 inches from theseal cage. Calculate the overhung load.

Overhung Load =126,000 x 115 x 1.00 x 1.00

10 x 68= 21,300 pounds

From the Type YB table on Page 31 for 1750 rpm input and 68rpm output (84 rpm output and lower), the low speed shaftoverhung load capacity for the 2110YB2 drive is 16,000 pounds.Since the actual load exceeds the published capacity of the2110YB2, refer to the Type YBT table on Page 33 and note thatthe overhung load capacity of the 2110YBT2 of 25,000 pounds issatisfactory for this application.

Triple Reduction � �

HighSpeedShaftrpm

NominalRatio�4%

Approx.L.S. Shaft

rpm

DRIVE SIZE

2050 2060 2070 2080 2090 2100 211021202125

21302135

21402145

21502155

21602165

21702175

21802185

21902195

117034.74 34 350 0 500 600 700 850 1000 1150 1300 760 1700 0 390 400 300047.08 25 350 290 500 600 700 850 1000 1150 1300 1500 1700 680 2300 2700 300057.66 20 350 340 500 600 700 850 1000 1150 1300 1460 1700 2000 2300 2700 3000

87034.74 25 350 0 500 600 700 850 1000 1150 1300 1500 1700 0 1520 2150 300047.08 18 350 400 500 600 700 850 1000 1150 1300 1500 1700 1610 2300 2700 300057.66 15 350 400 500 600 700 850 1000 1150 1300 1500 1700 2000 2300 2700 3000

720 34.74 21 350 130 500 600 700 850 1000 1150 1300 1500 1700 0 2300 2700 300047.08 15 350 400 500 600 700 850 1000 1150 1300 1500 1700 2000 2300 2700 3000

580 34.74 17 350 250 500 600 700 850 1000 1150 1300 1500 1700 690 2300 2700 300047.08 12.5 350 400 500 600 700 850 1000 1150 1300 1500 1700 2000 2300 2700 3000

Quadruple Reduction

1170and

Lower

238.4to 5 to .5 175 200 250 300 350 425 190 575 650

1207

� In each High Speed Shaft rpm section, the last overhung load value applies to all of the higher ratios of that gear reduction. Published ratings are based on a combination of themost unfavorable conditions of loading. For higher ratings, refer full data to Factory. For OHL values of ratios or H.S. Shaft speeds not shown, use the OHL value of the nextlowest ratio or next highest H.S. Shaft rpm.

� For YB & YBT Triple Reduction, Ratios 17.09-31.39 Sizes 2170-2195 the high speed shaft overhung loads for all input speeds and ratios ore as follows: Sizes 2170/2175,2300; Sizes 2180/2185, 2700 and Sizes 2190/2195, 3000.

Type Y & YF All Reductions

Low Speed Shaft Lf Load Location Factors �

Based on distance from the center line of load to drive seal cage

Type YB Double, Triple, and Quadruple Reduction

Low Speed Shaft Overhung Load Factors � — PoundsMultiply values listed below by 1000. . .Refer to Factory for overhung load ratings


Distance(Inches)

DRIVE SIZEDistance(Inches)

DRIVE SIZE

2050 2060 2070 2080 2090 2100 211021202125

21302135

21402145

21502155

21602165

21702175

21802185

21902195

2 .94 .92 .90 .88 4 .902.5 .98 .96 .93 .91 .89 4.5 .91 .903 1.02 1.00 .96 .94 .92 .90 .89 5 .92 .91 .903.5 1.06 1.04 1.00 .97 .95 .93 .92 .90 .89 .89 5.5 .94 .93 .91 .90

4 1.10 1.08 1.03 1.00 .97 .95 .94 .92 .91 .91 6 .95 .94 .92 .91 .904.555.5

. . .. . .. . .

1.11. . .

1.061.10. . .

1.031.061.09

1.001.031.05

.971.001.02

.96

.981.00

.94

.96

.98

.92

.94

.96

.92

.94

.95

789

.981.011.03

.96

.991.01

.95

.97

.99

.93

.96

.98

.92

.94

.96

66.577.5

. . .. . .. . .. . .

. . .

. . .

. . .

. . .

. . .

. . .

. . .. . .

1.12. . .. . .. . .

1.081.111.13. . .

1.031.071.091.12

1.021.051.071.09

1.001.021.041.06

.981.001.021.04

.96

.98

.991.01

10111213

1.061.091.12. . .

1.041.061.091.11

1.021.041.061.09

1.001.021.041.06

.981.001.021.04

88.59

10

1112

. . .

. . .

. . .. . .

. . .. . .

. . .

. . .

. . .. . .. . .. . .

. . .

. . .

. . .

. . .

. . .

. . .

. . .

. . .

. . .

. . .

. . .

. . .

. . .

. . .

. . .

. . .

. . .

1.14. . .. . .. . .. . .. . .

1.11. . .. . .. . .. . .. . .

1.081.101.12. . .. . .. . .

1.061.071.091.13. . .. . .

1.021.031.051.081.111.14

14151617

1819

. . .

. . .. . .. . .

1.111.13

1.091.111.13. . .. . .

1.061.081.111.121.13

� Interpolate for intermediate values. For example, Lf is .98 for a Size 2060 drive when Distance is 2.75 inches.

Center line of load is beyond end ofstandard L.S. Shaft. Contact Factory forspecial shaft.

Center line of load is beyondend of standard L.S. Shaft.Contact Factory for specialshaft.

HighSpeedShaftrpm

NominalRatio�3

ApproxL.S. Shaft

rpm

DRIVE SIZE

2050 2060 2070 2080 2090 2100 211021202125

21302135

21402145

21502155

21602165

21702175

21802185

21902190

1750

5.06 350 5.9 7.0 8.0 10.3 12.5 14.0 15.2 14.8 20.0 22.16.20 280 6.0 7.0 8.3 10.9 12.5 14.0 15.7 15.2 20.0 21.37.59 230 6.0 7.0 8.9 11.0 12.5 14.0 16.0 15.8 20.0 22.19.30 190 6.0 7.0 9.0 11.0 12.5 14.0 16.0 16.0 20.0 23.4

11.39 155 6.0 7.0 9.0 11.0 12.5 14.0 16.0 17.4 20.0 28.4 . . . . . . 50.013.95 125 6.0 7.0 9.0 11.0 12.5 14.0 16.0 18.0 20.0 27.8 32.3 . . . 50.0 65.017.09 100 6.0 7.0 9.0 11.0 12.5 14.0 16.0 18.0 20.0 30.0 35.0 40.0 50.0 65.020.93 84 6.0 7.0 9.0 11.0 12.5 14.0 16.0 18.0 20.0 30.0 35.0 40.0 50.0 65.0

1430

5.06 280 6.0 7.0 8.7 10.9 12.5 14.0 16.0 15.8 20.0 23.5 33.1 34.56.20 230 6.0 7.0 8.9 11.0 12.5 14.0 16.0 16.1 20.0 22.6 33.6 39.47.59 190 6.0 7.0 9.0 11.0 12.5 14.0 16.0 17.1 20.0 23.5 33.7 40.09.30 155 6.0 7.0 9.0 11.0 12.5 14.0 16.0 17.3 20.0 25.4 33.2 39.8

11.39 125 6.0 7.0 9.0 11.0 12.5 14.0 16.0 18.0 20.0 30.0 32.3 40.0 50.0 55.013.95 100 6.0 7.0 9.0 11.0 12.5 14.0 16.0 18.0 20.0 30.0 35.0 40.0 50.0 55.0 65.017.09 84 6.0 7.0 9.0 11.0 12.5 14.0 16.0 18.0 20.0 30.0 35.0 40.0 50.0 55.0 65.0

1170

5.06 230 6.0 7.0 9.0 11.0 12.5 14.0 16.0 16.8 20.0 24.9 35.0 37.6 47.6 55.06.20 190 6.0 7.0 9.0 11.0 12.5 14.0 16.0 17.1 20.0 24.0 35.0 40.0 48.7 55.07.59 155 6.0 7.0 9.0 11.0 12.5 14.0 16.0 18.0 20.0 25.4 35.0 40.0 50.0 55.09.30 125 6.0 7.0 9.0 11.0 12.5 14.0 16.0 18.0 20.0 27.9 35.0 40.0 50.0 55.0

11.39 100 6.0 7.0 9.0 11.0 12.5 14.0 16.0 18.0 20.0 30.0 35.0 40.0 50.0 55.013.95 84 6.0 7.0 9.0 11.0 12.5 14.0 16.0 18.0 20.0 30.0 35.0 40.0 50.0 55.0 65.0

870

5.06 175 6.0 7.0 9.0 11.0 12.5 14.0 16.0 18.0 20.0 27.4 35.0 40.0 50.0 55.0 65.06.20 140 6.0 7.0 9.0 11.0 12.5 14.0 16.0 18.0 20.0 26.4 35.0 40.0 50.0 55.0 65.07.59 115 6.0 7.0 9.0 11.0 12.5 14.0 16.0 18.0 20.0 29.5 35.0 40.0 50.0 55.0 65.09.30 95 6.0 7.0 9.0 11.0 12.5 14.0 16.0 18.0 20.0 30.0 35.0 40.0 50.0 55.0 65.0

7205.06 140 6.0 7.0 9.0 11.0 12.5 14.0 16.0 18.0 20.0 30.0 35.0 40.0 50.0 55.0 65.06.20 115 6.0 7.0 9.0 11.0 12.5 14.0 16.0 18.0 20.0 30.0 35.0 40.0 50.0 55.0 65.07.59 95 6.0 7.0 9.0 11.0 12.5 14.0 16.0 18.0 20.0 30.0 35.0 40.0 50.0 55.0 65.0

580 5.06 115 6.0 7.0 9.0 11.0 12.5 14.0 16.0 18.0 20.0 30.0 35.0 40.0 50.0 55.0 65.0

� In each High Speed Shaft rpm section, the last overhung load value applies to all of the higher ratios of all gear reductions. For OHL values of ratios or LS. Shaft speeds notshown, use the OHL value of the next lowest ratio or next highest L.S. Shaft rpm. Published ratings are for standard assemblies with shaft extensions as shown on the How toOrder page and are based on the most unfavorable conditions of loading. For higher ratings and ratings for the second shaft extension, refer full data to Factory.

Type GHB1

Lf — Load Location Factors �


DISTANCE(Inches)

DRIVE SIZE

2050 2060 2070 2080 2090 2100 2110 2120

1 .87 .83 .801.5 1.00 .94 .90 .87 .812 1.04 1.02 1.00 .97 .88 .842.5 1.09 1.05 1.03 1.02 .96 .913 1.14 1.08 1.06 1.04 1.01 .97 .913.5 1.18 1.12 1.09 1.07 1.03 1.01 .95 .924 . . . 1.15 1.12 1.09 1.06 1.03 1.00 .964.5 . . . . . . 1.15 1.12 1.08 1.04 1.02 1.005 . . . . . . . . . 1.14 1.10 1.06 1.03 1.025.5 . . . . . . . . . . . . 1.12 1.08 1.04 1.036 . . . . . . . . . . . . 1.15 1.10 1.06 1.046.5 . . . . . . . . . . . . . . . 1.12 1.07 1.057 . . . . . . . . . . . . . . . 1.13 1.08 1.077.5 . . . . . . . . . . . . . . . 1.15 1.10 1.088 . . . . . . . . . 1.12 1.098.5 . . . . . . . . . . . . 1.109 . . . . . . . . . . . . 1.12

� Interpolate for intermediate values.

Type GHB1

Overhung Load Factors � — Pounds

Low Speed Shaft Multiple values listed below by 1000. . .

Contact Factory for higher overhung load ratings

Center line of load is beyond end of standardL.S. Shaft. Contact Factory for special shaft.

HighSpeedShaftrpm

NominalRatio±3%

Approx.L.S.

Shaftrpm

DRIVE SIZE

2050 2060 2070 2080 2090 2100 2130 2135

1750

1.50 1170 2.50 2.76 4.70 4.74 8.471.84 950 2.50 2.25 3.88 4.04 7.77 13.02.25 780 2.50 3.14 4.24 4.52 7.17 13.0 18.02.76 640 2.50 3.30 3.69 3.72 7.45 13.0 18.0 20.5

3.38 520 2.50 3.29 3.98 5.80 8.41 13.0 18.0 19.24.13 420 2.50 3.30 4.30 5.80 6.70 13.0 18.0 25.05.06 350 2.50 3.30 4.21 5.32 7.61 13.0 18.0 23.1

1430

1.50 950 2.50 3.25 4.30 5.50 8.47 13.01.84 780 2.50 2.78 3.88 4.91 6.89 13.0 18.02.25 640 2.50 3.06 3.80 3.82 6.26 13.0 18.0 21.82.76 520 2.50 3.30 3.30 2.96 6.54 13.0 18.0 16.9

3.38 420 2.50 2.87 3.50 5.63 8.40 13.0 18.0 15.64.13 350 2.50 3.30 4.30 5.80 6.64 13.0 18.0 25.05.06 280 2.50 3.30 3.72 4.62 7.57 13.0 18.0 21.9

1170

1.50 780 2.50 3.30 4.30 5.80 8.47 13.0 18.0 25.01.84 640 2.50 2.78 3.87 5.80 5.98 13.0 18.0 24.72.25 520 2.50 2.97 3.49 3.03 6.03 12.4 18.0 18.32.76 420 2.50 3.30 3.21 2.48 5.82 13.0 18.0 13.1

3.38 350 2.50 2.44 3.05 4.96 8.40 13.0 18.0 13.64.13 280 2.50 3.30 4.30 5.80 6.68 12.4 18.0 22.05.06 230 2.50 3.30 3.26 4.15 7.58 13.0 18.0 20.9

870

1.50 580 2.50 3.30 4.30 5.80 8.47 13.0 18.0 25.01.84 470 2.50 2.77 3.91 5.80 5.91 13.0 18.0 24.72.25 390 2.50 2.88 3.51 2.78 6.00 10.1 18.0 12.82.76 320 2.50 3.30 3.14 2.30 5.85 11.9 18.0 7.15

3.38 260 2.50 2.13 2.23 4.76 8.40 12.9 18.0 13.64.13 210 2.50 3.30 4.30 5.76 6.66 10.0 18.0 21.45.06 175 2.50 3.30 3.19 4.10 7.63 10.9 18.0 19.8

720and

Lower

1.50 480 2.50 3.30 4.30 5.80 8.47 13.0 18.0 25.01.84 390 2.50 2.77 3.89 5.80 5.91 12.5 18.0 24.72.25 320 2.50 2.84 3.50 2.76 6.04 8.56 18.0 9.492.76 260 2.50 3.30 3.09 2.21 5.83 10.5 18.0 3.31

3.384.135.06

210175140

2.502.502.50

2.133.303.30

2.004.303.17

4.705.714.04

8.406.697.55

13.09.7510.6

18.018.018.0

13.621.519.2

� In each High Speed Shaft rpm section, the last overhung load value applies to all of the higher ratios of all gear reductions. For OHL values of ratios or L.S. shaft speeds not shown, use the OHL value of thenext lowest ratio or next highest L.S. shaft rpm. Published ratings are for standard assemblies with shaft extensions as shown on the How to Order page and are based on themost unfavorable conditions of loading. For higher ratings and ratings for the second shaft extension, refer full data to Factory.

Ratings of extra capacity L.S. shaft bearingsWhen the applied load exceeds the rated capacity of the standardlow speed shaft of a Type YB gear drive, the following areavailable for an extra charge, either

1. the Type YBT drive with extra capacity low speed bearings, or

2. an outboard bearing to increase the overhung load capacity,or

3. refer full details to Factory if the actual load exceeds thepublished capacity.

Published capacities are based on the most severe loadingconditions. A check at the Factory of the specific application willshow that additional capacity is available in many cases.

Type YBT Double Reduction

Low Speed Shaft Overhung Load Ratings � – PoundsMultiply values listed below by 1000...Refer to Factory for higher overhung load ratings


HighSpeed

Shaft rpm

NominalRatios�4%

Approx.L.S. Shaft

rpm

DRIVE SIZE

211021202125

21302135

21402145

21502155

21602165

21702175

21802185

21902195

1750

5.06 350 18.9 19.0 22.8 35.76.20 280 19.2 18.9 23.2 36.17.59 230 19.8 19.4 23.1 38.09.30 190 20.2 18.5 23.7 40.3

11.39 155 21.8 19.9 24.7 45.0 . . . . . . 75.0

13.95 125 23.9 22.4 26.9 45.0 50.0 . . . 75.017.09 100 25.0 23.5 29.2 45.0 50.0 60.0 75.020.93 84 25.0 26.9 31.6 45.0 50.0 60.0 75.025.63 68 25.0 27.9 34.1 45.0 50.0 60.0 75.031.39 56 25.0 30.0 35.0 45.0 50.0 60.0 75.0

1430

5.06 280 20.1 20.2 24.3 37.9 47.3 54.86.20 230 20.4 20.1 24.6 38.4 49.1 60.07.59 190 21.0 21.2 24.6 40.4 50.0 60.09.30 155 22.0 20.4 25.9 43.3 50.0 60.0

11.39 125 23.6 21.6 26.8 45.0 50.0 60.0 75.0 85.013.95 100 25.0 24.6 29.2 45.0 50.0 60.0 75.0 85.0 100.017.09 84 25.0 25.7 31.7 45.0 50.0 60.0 75.0 85.0 100.020.93 68 25.0 29.4 34.3 45.0 50.0 60.0 75.0 85.0 100.025.63 56 25.0 30.0 35.0 45.0 50.0 60.0 75.0 85.0 100.0

1170

5.06 230 21.3 21.4 25.8 40.3 50.0 59.0 73.3 81.76.20 190 21.7 21.3 26.1 40.7 50.0 60.0 75.0 84.77.59 155 22.3 23.1 26.1 43.3 50.0 60.0 75.0 85.09.30 125 23.9 22.5 28.3 45.0 50.0 60.0 75.0 85.0

11.39 100 25.0 23.6 29.1 45.0 50.0 60.0 75.0 85.013.95 84 25.0 27.0 31.7 45.0 50.0 60.0 75.0 85.0 100.017.09 68 25.0 28.0 34.4 45.0 50.0 60.0 75.0 85.0 100.020.93 56 25.0 30.0 35.0 45.0 50.0 60.0 75.0 85.0 100.0

870

5.06 175 23.3 23.4 28.1 44.1 50.0 60.0 75.0 85.0 100.06.20 140 23.7 23.3 28.6 44.7 50.0 60.0 75.0 85.0 100.07.59 115 25.0 26.3 28.8 45.0 50.0 60.0 75.0 85.0 100.0

9.30 95 25.0 25.8 32.2 45.0 50.0 60.0 75.0 85.0 100.011.39 77 25.0 26.8 32.9 45.0 50.0 60.0 75.0 85.0 100.013.95 62 25.0 30.0 35.0 45.0 50.0 60.0 75.0 85.0 100.0

720

5.06 140 24.7 24.8 30.1 45.0 50.0 60.0 75.0 85.0 100.06.20 115 25.0 25.0 30.6 45.0 50.0 60.0 75.0 85.0 100.07.59 95 25.0 28.5 31.3 45.0 50.0 60.0 75.0 85.0 100.0

9.30 77 25.0 28.1 34.9 45.0 50.0 60.0 75.0 85.0 100.011.39 62 25.0 29.1 35.0 45.0 50.0 60.0 75.0 85.0 100.013.95 50 25.0 30.0 35.0 45.0 50.0 60.0 75.0 85.0 100.0

580

5.06 115 25.0 27.3 33.0 45.0 50.0 60.0 75.0 85.0 100.06.20 95 25.0 27.5 33.7 45.0 50.0 60.0 75.0 85.0 100.07.59 77 25.0 30.0 34.4 45.0 50.0 60.0 75.0 85.0 100.09.30 62 25.0 30.0 35.0 45.0 50.0 60.0 75.0 85.0 100.0

� In each High speed Shaft rpm section, the last overhung load value applies to all of the higher ratios of all gear reductions. For OHL values of ratios or L.S. Shaft speeds notshown, use the OHL value of the next lowest ratio or next highest L.S. Shaft rpm. Published ratings are for standard assemblies with shaft extensions as shown on the How toOrder page and are based on the most unfavorable conditions of loading. For higher ratings and ratings for the second shaft extension, refer full data to the Factory.

XZ

L.S.SHAFT

BZ

Note that external dimensions are the same

for the type YB and YBT drives except forthose tabulated below. Refer to pages35 and 36 for balance of type YBT drivedimensions.

SIZE 211021202125

BZ 8.31 9.38

XZ 1075 11.50

Type GHB Dimensions — Inches

Right Angle Gear Drives Single Reduction Sizes 2050 through 2120


XX

N

S

T

X

B USABLELENGTH

SHAFT GUARD(WHEN REQ'D)

INSPECTIONCOVER

USABLELENGTH

FAN GUARD/AIRDEFLECTOR (WHEN REQ'D)

H.S. SHAFTKEY

A

R

QQ

M M

L

F FG

K

P H Y C

V

E

Z

VENT

W

O D

OIL LEVELDIP STICK

J

4 HOLES FORU-DIA. BOLT

OILDRAIN

DRIVE SIZE� Q R

L.S. SHAFT � H.S. SHAFT �

U V W X XX � Y ZWtlbS Key T Key

2050 3.00 0.88 1.750 3/8 x 3/8 x 3 1.500 3/8 x 3/8 x 2½ 0.63 5.50 21.88 5.52 10.92 . 4.62 1452060 3.75 1.25 2.000 ½ x ½ x 3 ½ 1.750 3/8 x 3/8 x 3 0.75 7.00 24.82 7.12 12.56 2.00 5.81 24020702080

4.254.50

1.501.50

2.3752.750

5/8 x 5/8 x 45/8 x 5/8 x 4 ½

2.0002.250

½ x ½ x 3½½ x ½ x 4

0.750.87

8.009.50

27.9432.25

8.319.18

15.0415.92

2.005.00

6.887.88

425555

20902100

5.506.00

1.501.75

3.0004.000

¾ x ¾ x 5 ½1 x 1 x 6 ½

2.7503.250

5/8 x 5/8 x 4½¾ x ¾ x 5

1.001.25

12.5015.75

38.3845.38

10.7513.18

19.2022.92

4.005.00

9.9411.50

8301480

21102120

8.008.50

2.002.00

5.5005.750

1 ¼ x 11/4 x 8 ½1 ½ x 1 ½ x 9

4.0004.500

1 x 1 x 61 x 1 x 7 ½

1.501.50

17.7521.00

56.8865.12

16.2518.12

28.6830.80

5.007.00

14.0616.62

29904400

DRIVE SIZE�

AB C D E F G H J K L M N O P

W/O Fan With Fan

2050 3.25 1.50 3.94 � 6.00 ‡ 13.00 1.00 11.50 � 4.75 13.50 9.00 3.50 9.88 15.88 �

2060 3.81 2.00 4.25 2.00 7.38 ‡ 16.00 0.88 14.00 3.25 5.88 15.75 11.00 4.50 12.00 17.44 4.752070 4.38 2.44 4.88 3.12 8.68 19.00 1.00 17.25 4.75 7.75 19.25 12.00 5.00 13.75 19.25 4.752080 4.88 2.88 5.25 5.00 9.75 ‡ 21.50 1.25 19.25 3.38 8.32 21.75 14.00 5.75 15.00 22.50 5.00

2090 5.62 3.38 6.00 4.00 12.00 26.50 1.75 23.50 6.00 11.00 27.00 18.00 7.25 17.75 26.38 6.252100 6.38 3.94 7.50 7.00 14.00 32.00 2.00 29.25 9.00 12.75 33.25 21.00 8.50 21.12 31.38 7.002110 7.50 4.94 8.38 6.00 16.75 38.12 2.00 34.00 7.25 15.12 38.00 28.00 12.00 26.00 40.12 9.622120 8.38 5.94 9.25 10.00 19.88 44.25 2.00 40.00 10.00 18.50 44.00 31.75 13.88 29.00 45.25 10.00

� Size 2050 has foundation pads full length of base.

� Shaft diameters under 3" are held to limits of +.0000", -.0005".Shaft diameters 3" and over are held to limits of +.000", -.001".Shaft keyseat depth is one-half of key height.

� Double extension will be furnished only when specified on the order.

‡ Dimension D is greater than J plus F only for Sizes 2050, 2060 and 2080.

Dimension A in the shaded area is also usable key length for fan cooled drives.� Drives are for horizontal floor mounted operation unless specifically stated

otherwise. Refer to Factory for other mountings. Dimensions are for reference onlyand subject to change without notice unless certified.

Types YB and YBT Dimensions —Inches

Right Angle Gear Drives Double, Triple, & Quadruple Reduction Sizes 2050 through 2155


DRIVESIZE � B BA D E F G H � J K L M N P � Q R

L.S. Shaft �

U V X XX � ZS Key

2050 4.00 . . . 8.50 15.75 2.50 9.25 . . . 6.00 23.50 11.50 4.88 11.00 . . . 2.75 0.63 2.750 5/8 x 5/8 x 4 0.75 8.00 6.13 12.31 . . .2060 4.81 . . . 9.50 17.75 2.50 10.88 . . . 7.00 26.75 12.25 5.25 12.00 . . . 3.13 0.63 3.000 ¾ x ¾ x 4 ½ 0.75 9.00 6.75 14.17 . . .2070 5.38 . . . 10.63 20.13 3.00 12.13 . . . 7.63 30.25 14.00 5.88 13.50 . . . 3.00 0.75 3.500 7/8 x 7/8 x 5 1.00 10.25 7.38 14.63 . . .2080 6.44 . . . 12.13 22.50 3.00 14.50 . . . 9.13 35.00 15.50 6.63 15.13 . . . 3.75 0.75 4.000 1 x 1 x 6 1.00 11.50 8.13 15.75 . . .

2090 7.06 . . . 13.38 25.38 3.38 15.50 . . . 10.00 37.75 16.75 7.13 16.50 . . . 3.38 1.31 4.500 1 x 1 x 7 1.13 13.00 8.63 17.75 . . .2100 8.25 . . . 15.00 29.19 3.38 18.00 . . . 11.63 42.75 18.50 8.00 18.50 . . . 3.25 1.31 5.000 1¼ x 1¼ x 7½ 1.13 14.50 9.75 19.50 . . .2110 9.06 § . . . 17.00 32.81 3.50 19.75 . . . 13.50 46.50 19.50 8.38 19.88 . . . 4.75 1.06 5.500 1¼ x 1¼ x 8½ † 1.25 16.25 10.25 ‡ 20.50 � . . .

2120/2125 9.88 § . . . 18.75 36.06 3.63 22.50 15.25 15.13 52.25 21.00 9.13 21.50 7.25 4.00 1.06 6.000 1½ x 1½ x 9 † 1.25 18.00 11.00 ‡ 22.25 � . . .

2130/2135 10.69 § . . . 20.63 39.94 4.25 24.75 16.25 16.38 58.00 23.75 10.25 23.50 8.50 4.00 1.13 6.500 1½ x 1½ x 10 1.50 20.00 12.13 24.34 � . . .2140/2145 12.13 8.75 23.75 45.00 3.00 27.75 18.75 11.50 65.50 30.50 13.37 28.25 8.00 6.00 1.25 7.250 1 ¾ x 1 ¼ x 11 1.75 22.50 15.50 29.00 21.632150/2155 12.63 10.50 26.00 49.75 3.00 32.50 23.50 12.00 73.00 32.00 14.13 29.75 8.00 6.00 1.50 7.750 2 x 1 ½ x 12 1.75 25.00 16.25 30.50 23.88

� Sizes 1080 through 1110 have foundation pads full length of base.

� Shaft diameters under 3” are held to limits of +.0000”, - .0005”.Shaft diameters 3 “ and over are held to limits of +.000”, -.001”.Shaft keyseat depth is one-half of key height.

† For YFT drive, reduce this dimension by ½”.‡ Dimension “X” is 10 ¾ for 2110YBT and 11½” for 2120/2125YBT.� Dimension “XX” is 21”for 2110YBT, 23 5/8” for 2120/2125YBT and 24½” for

2130/2135YBT.

� Drives are for horizontal floor mounted operation unless specifically statedotherwise. Refer to Factory for other mountings. Dimensions are for reference onlyand subject to change without notice unless certified.

� Double extension will be furnished only when specified on the order.� Contact Factory§ Dimension “B” is 8 5/16” for 2110YBT; 9 3/8” for 2120/2125YBT and 10 5/16 “

for 2130/2135YBT.

Dimension “A” in the shaded area is also usable key length for fan cooleddrives.

W

G

KL

M

Q Q

R

M G

HJ

POILDRAIN

P

4 HOLES FORLIFTING DRIVE

OIL LEVELDIP STICK

6-HOLES FORU-DIA. BOLTP

F

1.2

E

V

F

DOT

A

S

B

N X

XX

USABLELENGTH

USABLELENGTH

INSPECTIONCOVER

SHAFT GUARD(WHEN REQUIRED)

H.S. SHAFTKEY

L.S. SHAFTKEY

VENT

W

K

G JOIL

DRAINS

4 HOLES FORLIFTING DRIVE

OIL LEVELDIP STICK

LEVELINGPADS

8-HOLES FORU-DIA. BOLT

F

E

V

J FBA

DO

Z

DRIVE WITHCOOLING FAN

DRIVESIZE

�

Double Reduction Triple Reduction Quadruple Reduction

Wtlb

A

O W

H. S. Shaft �

Wtlb

A

O W

H. S. Shaft �

Wtlb

A O W

H. S. Shaft �

W/OFan

WithFan

T KeyW/OFan

WithFan

T Key T Key

2050 470 2.38 1.50 23.38 31.88 1.500 3/8 x 3/8 x 2½ 470 2.06 . . . 23.69 32.19 1.125 ¼ x ¼ x 21/4 470 2.06 23.69 32.19 1.125 ¼ x ¼ x 21/4

2060 600 3.00 2.00 25.88 35.38 1.750 3/8 x 3/8 x 3 610 2.06 . . . 25.63 35.13 1.125 ¼ x ¼ x 21/4 610 2.06 25.63 35.13 1.125 ¼ x ¼ x 21/4

2070 840 3.44 2.38 29.00 39.63 2.000 ½ x ½ x 3½ 840 2.63 . . . 31.88 42.50 1.500 3/8 x 3/8 x 2¾ 850 2.06 27.50 38.13 1.125 ¼ x ¼ x 21/4

2080 1240 3.81 2.88 33.50 45.63 2.250 ½ x ½ x 4 1220 2.63 . . . 34.38 46.50 1.500 3/8 x 3/8 x 2¾ 1130 2.06 30.00 42.13 1.125 ¼ x ¼ x 21/4

2090 1750 3.43 2.50 35.00 48.38 2.250 ½ x ½ x 3½ 1730 3.00 . . . 37.38 50.75 1.750 3/8 x 3/8 x 3 1510 2.06 31.50 44.88 1.125 ¼ x ¼ x 21/4

2100 2110 4.63 3.38 40.63 55.63 2.750 5/8 x 5/8 x 4½ 2050 3.00 . . . 40.13 55.13 1.750 3/8 x 3/8 x 3 2050 1.81 34.25 49.25 1.125 ¼ x ¼ x 17/8

2110 2630 4.63 3.38 42.38 59.38 2.750 5/8 x 5/8 x 4½ 2600 3.44 � 43.75 60.75 2.000 ½ x ½ x 3½ 2610 1.81 36.00 53.00 1.125 ¼ x ¼ x 17/8

2120/2125 3520 5.19 3.50 47.25 66.00 3.000 ¾ x ¾ x 5 3440 3.44 � 47.00 65.75 2.000 ½ x ½ x 3½ 3510 2.63 43.63 62.38 1.500 3/8 x 3/8 x 2¾

2130/2135 4880 5.56 3.88 51.38 72.00 3.250 ¾ x ¾ x 5 4700 3.81 � 53.50 74.13 2.250 ½ x 1/2 x 4 4750 2.63 46.88 67.50 1.500 3/8 x 3/8 x 2¾2140/2145 7420 5.75 4.00 59.25 83.00 3.500 7/8 x 7/8 x 5½ 7160 3.44 2.50 57.50 81.25 2.250 ½ x ½ x 3½ . . . . . . . . . . . . . . .2150/2155 9060 6.56 5.00 65.13 91.13 4.000 1 x 1 x 6 8710 4.63 2.75 65.63 91.63 2.750 5/8 x 5/8 x 4 ½ . . . . . . . . . . . . . . .

Type YB and YBT Dimensions — Inches

Right Angle Gear Drives Double & Triple Reduction Sizes 2160 through 2195


DRIVESIZE � B BA D E F G H J K L M N P Q R

L.S. Shaft �

U V � X XX � ZS Key

2160/2165 13.81 13.00 30.38 44.88 3.00 18.50 56.38 13.75 83.50 36.00 15.88 33.00 19.50 7.25 1.88 8.500 2 x 11/2 x 13 2.00 16.25 18.25 33.75 27.632170/2175 15.06 14.50 33.12 49.38 3.00 21.00 61.88 15.00 92.50 38.50 16.88 35.50 21.00 7.75 1.88 9.250 21/2 x 13/4 x 14 2.25 18.00 19.50 36.38 30.382180/2185 16.69 17.00 36.75 54.00 3.00 23.25 68.00 16.00 101.50 41.00 18.12 38.50 22.75 8.00 2.12 10.000 21/2 x 13/4 x 15 2.25 19.50 21.00 39.50 33.502190/2195 18.69 18.50 40.25 60.25 3.50 26.25 75.38 17.50 113.00 45.00 19.75 42.00 25.25 8.50 2.38 11.000 21/2 x 13/4 x 17 2.50 22.00 22.75 43.00 37.00

DRIVESIZE

�

Double Reduction Triple Reduction

Ratio RangeWtlb

A

O W

H. S. Shaft �

RatioRange

Wtlb

A

O W

H. S. Shaft �

W/OFan

WithFan

T KeyW/OFan

WithFan

T Key

2160/2165 5.06 thru 31.39 10,200 7.50 6.00 74.25 104.63 4.500 1 x 1 x 7½ 34.74 thru 194.6 10,000 4.63 3.38 71.38 101.75 2.750 5/8 x 5/8 x 4½

2170/2175 5.06 thru 13.95 13,000 8.12 6.50 81.00 114.12 5.000 1¼ x 1¼ x 7½ {15.44 thru 31.3934.74 thru 194.6

12,70012,500

8.125.19

��

86.3879.25

119.50112.38

5.0003.000

1¼ x 1¼ x 7½¾ x ¾ x 5

2180/2185 5.06 thru 13.95 16,500 9.00 7.50 88.50 125.25 5.500 1¼ x 1¼ x 8½ {15.44 thru 31.3934.74 thru 194.6

16,20016,000

9.005.56

��

98.8886.38

135.63123.12

5.5003.250

1¼ x 1¼ x 8½¾ x ¾ x 5

2190/2195 5.06 thru 13.95 21,500 9.63 7.63 98.50 138.75 6.000 1½ x 1½ x 9 {15.44 thru 21.3934.74 thru 194.6

21,20021,000

9.635.75

��

106.0098.25

146.25138.50

6.0003.500

1½ x 1½ x 97/8 x 7/8 x 5 ½

� Drives are for horizontal floor mounted operation unless specifically statedotherwise. Refer to Factory for other mountings. Dimensions are for reference onlyand are subject to change without notice unless certified.

� Drive sizes 2160 thru 2195 are also available with mounting level at bottom ofdrive.

� Double extension will be furnished only when specified on the order.

� Shaft diameters under 3” are held to limits of +.0000”, -.0005”. Shaftdiameters 3” and over are held to limits of +.000”, - 001”. Shaft key seatdepth is one-half of key height.Dimensions are for reference and subject to change without notice unlesscertified.

� Contact Factory.

Dimension A in the shaded area is also usable key length for fan cooleddrives.

Motor Brackets for YB Series Gear DrivesA Falk Steel Motor Bracket can be used on any gear driveapplication where the physical size of the motor is not larger thanthe drive. A Motor Bracket eliminates extra foundations andsimplifies installation. Brackets bolt to the gear drive housing inmuch the same manner as on the universally popular UltraMaxdesign. Housings are drilled and tapped for brackets only whendrives are purchased with Falk™ motor brackets. The priceincludes drilling and tapping face of drive housing, an adapter, abracket and mounting of the bracket. (Coupling is extra.) Motorbrackets are not available for the 2000 GHB Series and 2140 YBand larger drives.

To determine whether a motor bracket satisfies your motorapplication requirement, proceed as follows”

For 1964 Rerated NEMA Motor frames, refer to the top ofPage 38 and select a motor bracket to suit the drive and motorframe size for the particular application. Bracket dimensions areshown at the bottom of the page.

For 1953 Rerated NEMA, Non-NEMA, and Larger MotorFrames, contact Factory.

Shaft Gap for YB Drives with Motor Brackets

In general, motor bracket selectionsprovide a gap between drive andmotor shafts equal to the normal Falk™Steelflex® or gear coupling gaps asshown on Page 38. The table at rightshows various combinations of drivesand motors requiring shaft gaps largerthan normal. In these cases it is necessaryto overhang one or both coupling hubs;if the overhang with a standard hubresults in less than one shaft diameterengagement, a coupling with extendedhubs is recommended.

Falk offers several types of flexibleshaft couplings; the Steelflex Grid,the Lifelign Gear, the WrapflexElastomer, and the Freedom Disc.


DRIVE/MOTOR SHAFT GAP — INCHES(For combinations not listed, shaft gap and coupling gap is the same

Drive Sizeand

Reduction

Totally Enclosed Fan Cooled Motors Open Drip Proof Motors

284 286 324 326 405 284 286 324 326 404

T TS T TS T TS T TS T TS T TS T TS T TS T TS T TS

2050YB2 1.44 2.63 1.44 2.63 . . . . . . . . . . . . . . . . . . . . . 1.38 . . . 1.38

YB3 1.12 2.31 1.12 2.31 . . . . . . . . . . . . . . . . . . . . . 1.06 . . . 1.06

2060YB2 1.19 2.38 1.19 2.38 . . . . . . . . . . . . . . . . . . . . . 1.12 . . . 1.12

YB3 1.44 2.63 1.44 2.63 . . . . . . . . . . . . . . . . . . . . . 1.38 . . . 1.38

2070YB2 0.44 1.81 0.44 1.81 0.50 3.25 .50 3.12 . . . . . . 0.44 1.81 0.44 1.81 0.50 2.0 0.50 2.0

YB3 . . . . . . . . . . . . . . . 0.38 . . . 0.25

2080YB2 . . . 1.31 . . . 1.31 . . . 2.75 . . . 2.63 . . . 1.00 . . . 1.31 . . . 1.31 . . . 1.50 . . . 1.50 . . . 0.50

YB3 . . . 0.44 . . . 0.44 . . . 1.88 . . . . . . . . . . . . . . . 0.44 . . . 0.44 . . . 0.63

2090YB2 . . . 1.31 . . . 1.31 . . . 2.75 . . . 2.63 . . . 1.00 . . . 1.31 . . . 1.31 . . . 1.50 . . . 1.50 . . . 0.50

YB3 . . . . . . . . . . . . . . . 0.38 . . . 0.25

2100YB2 . . . . . . . . . . . . . . . 1.25 . . . 1.12

YB3 . . . 0.31 . . . 0.31 . . . 1.75 . . . 1.63 . . . . . . . . . 0.31 . . . 0.31 . . . 0.50 . . . 0.50

2110YB2 . . . . . . . . . . . . . . . 1.25 . . . 1.1 2

YB3 . . . . . . . . . . . . . . . . . . . . . . . .

2120 YB2 . . . . . . . . . . . . . . . . . . . . . . . .

2125 YB3 . . . . . . . . . . . . . . . 0.63 . . . 0.50

Type YB Motor Bracket Selection and DimensionsMOTOR BRACKET SELECTIONS (For totally enclosed fan cooled and open drip proof motors.)


MotorFrameSize

HORSEPOWER AT RPM DRIVE AND MOTOR BRACKET SIZE �

1750 1170 870

Type YB2, Double Reduction Type YB3, Triple Reduction

2050 2060 2070 2080 2090 2100 211021202125

21302135

2050 2060 2070 2080 2090 2100 211021202125

21302135

143T145T182T

1.001.50-2.00

3.00

.7511.50

.50

.751

191921

191921

. . .

. . .25

. . .

. . .25

. . .

. . .

. . .

. . .

. . .

. . .

. . .

. . .

. . .

. . .. . .. . .

. . .. . .. . .

191921

191921 26 25

184T213T215T

5.007.50

10

235

1.5023

212222

212222

252626

252626

252626

. . .2727

. . .

. . .27

. . .

. . .. . .. . .. . .

212222

212222

262727

262627

262727

2627 27

254T256T284T

152025

7.501015

57.50

10

232324

232324

272728

272728

272728

272828

272828

282828

. . .2828

232324

232324

282828

272828

282828

272828

282829

282828

2929

284TS286T286TS

253030

152020

101515

242424

242424

282828

282828

282828

282928

282928

282928

282928

242424

242424

282928

282828

282928

282828

282929

282928

29

29

324T324TS326T

404050

252530

202025

. . .. . .. . .

. . .

. . .

. . .

292929

292929

292929

292929

292929

2929. . .

2929. . .

. . .

. . .. . .. . .. . .

2929. . .

292929

2929. . .

292929

2929

2929 29

326TS364T364TS

506060

304040

253030

. . .

. . .

. . .

. . .

. . .

. . .

29. . .. . .

293030

293030

293030

293030

29. . .30

29. . .30

. . .

. . .

. . .

. . .

. . .

. . .

29. . .. . .

293030

29. . .30

293030

29

30

29

30

365T365TS404T404TS

7575

†100†100

50506060

40405050

. . .

. . .

. . .

. . .

. . .

. . .

. . .

. . .

. . .

. . .. . .. . .

30303131

30303131

. . .303131

. . .303131

. . .30. . .31

. . .30. . .31

. . .

. . .

. . .

. . .

. . .

. . .. . .. . .

. . .. . .. . .. . .

30303131

. . .30. . .31

30303131

30

31

30

31 31

405T‡100

75 60 . . . . . . . . . 31 31†125

405TS‡100

75 60 . . . . . . . . . 31 31 31 31 31 31 . . . . . . . . . 31 31 31 31 31†125

444TS‡125

100 75 . . . . . . . . . . . . 32 32 32 32 32 . . . . . . . . . . . . 32 32 32 32†150

445TS‡150 125 100 . . . . . . . . . . . . 32 . . . . . . . . . . . . . . . . . . . . . . . . . . . 32†200

† Rating for open drip proof motor only.

‡ Rating for totally enclosed fan cooled motor only.� For Type YB4 quadruple selections, contact Factory.

BRACKETNUMBER

DIMENSIONS — INCHES

2050 2060 2070 2080 2090 2100 2110 2120/2125 2130/2135 2050-2135

MB MC MB MC MB MC MB MC MB MC MB MC MB MC MB MC MB MC AC MA MD

19 3.31 35.44 4.31 37.69 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.25 7.00 3.6320 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21 2.81 35.50 3.81 37.75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.25 9.00 4.6322 2.25 38.50 3.25 40.75 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.00 10.50 5.3823 1.06 43.25 2.06 45.50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.06 12.50 6.3824 0.25 46.13 1.25 48.38 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.88 14.00 7.1325 . . . . . . . . . . . . 3.75 41.06 5.00 45.06 6.50 46.56 . . . . . . . . . . . . . . . . . . . . . . . . 5.56 9.00 4.6326 . . . . . . . . . . . . 4.25 43.88 5.50 47.88 7.50 49.38 8.50 53.50 . . . . . . . . . . . . . . . . . . 6.19 10.50 5.3827 . . . . . . . . . . . . 3.25 48.75 4.50 52.75 6.00 54.25 7.50 58.38 9.25 60.13 . . . . . . . . . . . . 7.13 12.50 6.3828 . . . . . . . . . . . . 2.50 51.88 3.75 55.88 5.25 57.38 6.75 61.50 8.50 63.25 10.25 67.25 12.25 71.63 8.69 14.00 7.1329 . . . . . . . . . . . . 1.38 54.38 2.63 58.38 4.13 59.88 5.63 64.00 7.38 65.75 9.13 69.75 11.13 74.13 8.88 16.00 8.1330 . . . . . . . . . . . . . . . . . . 0.25 59.38 1.75 60.88 3.25 65.00 5.00 66.75 6.75 70.75 8.75 75.13 10.56 18.00 9.1331 . . . . . . . . . . . . . . . . . . � 62.38 0.25 63.88 1.75 68.00 3.50 69.75 5.25 73.75 7.25 78.13 12.25 20.00 10.1332 . . . . . . . . . . . . . . . . . . . . . . . . � 66.13 1.06 70.25 2.44 72.00 4.19 76.00 6.19 80.38 12.44 22.00 11.13

� SHIM DRIVE 1.50”, then MB = 0.25”.

� SHIM DRIVE 1.10”, then MB = 0.19”.

Dimension C depends on type, size, and make of motor.Dimensions are for reference only and subjectto change without notice unless certified.

A bedplate is recommended to insure proper alignment ofthe drive with the motor. Rexnord offers a complete line offabricated steel Bedplates for all popular sizes of standard Type YBseries gear drives. These bedplates accommodate any standardNEMA frame motor within the horsepower range of the gear driveand most of the larger non-NEMA frame motors. In addition,special bedplates can be manufactured to suit any given drive,motor, and special accessory combination.

Versatile welded steel construction permits rapid modification ofstandard bedplates by addition or deletion. Supports fortachometers, brakes, timing devices, or other accessories can alsobe added.

How to SelectFor standard NEMA Motor Frames: The Bedplate Size Codeexplained on Page 40 indicates the range of NEMA motor framesthat are covered with the standard bedplates. Select a bed to suitthe drive size, reduction, and motor frame size.

For Non-NEMA Motor Frames: When a motor does notconform to NEMA standards, check motor mounting dimensionsA, B, D, M, and N as follows to determine whether a standardBedplate can be used.

A. A standard bedplate can be used for a non-NEMA motor ifALL of the following conditions exist:

1. CB + BB equals or exceeds

GAP + (N + M+ B/2 of motor),

2. CB equals or is less than

GAP + (N + M – B/2 of motor),

3. 2AB equals or exceeds A of motor,

4. DB equals or exceeds D of motor.

B. A standard gear drive section can be used with a specialmotor section when motor dimensions A and D do notexceed those shown in Table at right.

C. If all of the conditions of A or B above cannot be met, acompletely special bedplate is required; contact Factory.


APPROXIMATE BEDPLATE WEIGHTS – POUNDS

DRIVESIZE

Motor Frame Size

213215

254256

284286

324326

364365

404405

444445

504505

583588

683688

2050 297 297 297 342 342 495 495 5582060 423 423 423 459 459 504 504 5672070 423 423 423 468 468 513 513 5762080 675 675 675 675 810 810 810 828 864

209021002110

837. . .. . .

837. . .. . .

83711071071

83711071071

97211071071

97211071071

97212421206

99012421206

103511881152

14761440

2120/2125 . . . . . . . . . . . . 1458 1458 1458 1539 1692 17462130/2135 . . . . . . . . . . . . 1566 1566 1566 1647 1827 18902140/2145 . . . . . . . . . . . . . . . . . . 2700 2700 2736 31142150/2155 . . . . . . . . . . . . . . . . . . 2781 2781 2817 3168

MAXIMUM MOTOR DIMENSIONS – INCHES

(For Special Motor Sections withStandard Drive Section)

DRIVE SIZEType YB and YB3 Series �

A D

2050 29 12.502060 29 12.502070 34 14.502080 34 14.50

2090 38 17.002100 38 17.002110 38 17.00

2120/2125 43 20.252130/2135 43 21.252140/2145 49.5 25.752150/2155 49.5 26.75

� For Type YB4, contact Factory.

Bedplates for YB series gear drives

BEDPLATES TOACCOMMODATEOUTBOARDBEARINGS ALSOAVAILABLE.

Type YB Bedplate Selections and Dimensions �


DRIVESIZE

BEDPLATESIZE CODE

BEDPLATE DMENSIONS — INCHES (BASED ON 1964 NEMA STANDARD) �

DRIVE MOTOR AB BB CB DB EB FB GB HB JB KB LB MB NB OB PB QB RB SB TB UB V VB WB XB Type YB O

20502052

or2053

21283236

7.509.50

18.5023.00

4.815.31

7.069.06

8.638.63

15.0025.75

33.6333.63

4.504.00

60.8867.63

18.7529.25

8.504.75

2.001.75

30.1330.13

27.0034.00

20.7520.75

6.634.63 13.75 1.75 1.00 1.00 8.00 6.63 4.75 5.75

YB2YB3

12.1911.88

23.3823.69

40445000

11.5013.00

28.7532.63

10.4414.06

11.0612.56

12.2512.25

25.2535.50

37.2537.25

5.006.00

76.7585.75

28.7539.00

10.509.50

2.001.75

33.7533.75

39.2548.50

28.0028.00

6.134.63 17.25 1.75 1.00 1.00 8.00 6.63 4.75 9.25

YB2YB3

12.1911.88

23.3823.69

20602060

or2063

2128 7.50 18.50 5.06 7.06 10.00 15.00 40.25 4.50 67.50 18.75 8.50 2.00 36.75 27.00 23.50 10.13

17.25 1.75 1.00 1.00 9.00 7.00 5.00 8.253236 9.50 23.00 5.06 9.06 12.25 19.50 40.25 4.00 72.00 23.25 8.50 2.00 36.75 31.50 28.00 8.13 YB2 16.06 25.884044 11.50 28.75 7.06 11.06 12.25 25.25 40.25 5.00 79.75 29.00 10.50 2.00 36.75 39.25 28.00 6.13 YB3 16.31 25635000 13.00 32.63 12.19 12.56 12.25 35.50 40.25 6.00 88.75 39.00 9.50 1.75 36.75 48.50 28.00 4.63

20702072

or2073

2128 7.50 18.50 5.94 7.06 10.00 15.00 43.25 4.50 70.50 18.75 8.50 2.00 39.75 27.00 23.50 10.13

17.25 1.75 1.00 1.13 10.25 8.00 6.00 7.003236 9.50 23.00 5.94 9.06 12.25 19.50 43.25 4.00 75.00 23.25 8.50 2.00 39.75 31.50 28.00 8.13 YB2 15.06 29.004044 11.50 28.75 7.94 11.06 12.25 25.25 43.25 5.00 82.75 29.00 10.50 2.00 39.75 39.25 28.00 6.13 YB3 12.19 31.885000 13.00 32.63 13.06 12.56 12.25 35.50 43.25 6.00 91.75 39.00 9.50 1.75 39.75 48.50 28.00 4.63

20802082

or2083

2132 8.50 21.75 6.25 8.06 11.50 18.25 50.38 5.50 81.38 22.1 8.88 2.13 46.38 30.88 27.00 12.38

20.50 2.00 1.13 1.25 11.50 8.75 6.75 9.003644 11.50 30.75 7.25 11.06 14.50 27.25 50.38 6.00 91.38 31.13 9.88 2.13 46.38 40.88 33.00 9.38 YB2 17.88 33.505000 13.00 33.50 11.13 12.56 14.50 30.00 50.38 6.00 98.00 33.88 13.75 2.13 46.38 47.5 33.00 7.88 YB3 17.00 34.385800 15.00 35.38 17.13 14.56 14.50 38.88 50.38 6.00 105.88 43.00 12.50 2.00 46.38 55.50 33.00 5.88

20902092

or2093

2132 8.50 21.75 3.81 8.06 11.50 18.25 53.13 5.50 84.13 22.13 8.88 2.13 49.13 30.88 27.00 12.38

20.50 2.00 1.13 1.25 13.00 9.25 7.25 7.503644 11.50 30.75 4.81 11.06 14.50 27.25 53.13 6.00 94.13 31.13 9.88 2.13 49.13 40.88 33.00 9.38 YB2 21.19 35.005000 13.00 33.50 8.69 12.56 14.50 30.00 53.13 6.00 100.75 33.88 13.75 2.13 49.13 47.50 33.00 7.88 YB3 18.81 37.385800 15.00 35.38 14.69 14.56 14.50 38.88 53.13 6.00 108.63 43.00 12.50 2.00 49.13 55.50 33.00 5.88

21002102

or2103

2840 11.00 25.50 4.88 10.06 12.75 21.00 59.75 6.50 94.88 25.88 9.25 2.63 55.25 34.75 30.00 14.13

24.25 2.25 1.25 1.50 14.50 10.25 7.75 9.754450 13.00 35.50 7.88 12.56 16.25 31.00 59.75 6.00 107.88 35.88 12.25 2.63 55.25 47.75 37.00 11.63 YB2 21.25 40.635800 15.00 34.50 14.13 14.56 16.25 29.75 59.75 6.00 112.88 34.63 18.50 2.63 55.25 52.75 37.00 9.63 YB3 21.75 40.136800 17.50 42.50 16.13 17.06 16.25 46.38 59.75 7.00 126.25 50.88 15.63 2.25 55.25 66.50 37.00 7.13

21102112

or2113

2840 11.00 25.50 4.88 10.06 12.75 21.00 63.50 6.50 98.63 25.88 9.25 2.63 59.00 34.75 30.00 14.13

24.25 2.25 1.25 1.50 16.25 10.75 8.25 8.004450 13.00 35.50 7.88 12.56 16.25 31.00 63.50 6.00 111.63 35.88 12.25 2.63 59.00 47.75 37.00 11.63 YB2 23.25 42.385800 15.00 34.50 14.13 14.56 16.25 29.75 63.50 6.00 116.63 34.63 18.50 2.63 59.00 52.75 37.00 9.63 YB3 21.88 43.756800 17.50 42.50 16.13 17.06 16.25 46.38 63.50 7.00 130.00 50.88 15.63 2.25 59.00 66.50 37.00 7.13

21202125

2122or

2123

3644 11.50 30.00 5.75 11.06 15.25 25.00 72.13 6.00 114.50 30.38 12.00 2.88 67.13 42.00 35.50 18.13

29.25 2.50 1.50 1.50 18.00 11.50 8.50 11.255000 13.25 35.75 6.75 12.56 15.25 30.75 72.13 6.00 121.25 36.13 13.00 2.88 67.13 48.75 35.50 16.63 YB2 28.63 47.255800 15.00 39.50 8.50 14.56 19.00 34.50 72.13 6.00 126.75 39.88 14.75 2.88 67.13 54.25 43.00 14.63 YB3 28.00 47.006800 17.50 43.25 14.00 17.06 19.00 38.25 72.13 7.00 136.00 43.63 20.25 2.88 67.13 63.50 43.00 12.13

21302135

2132or

2133

3644 11.50 30.00 5.50 12.06 15.25 25.00 77.25 6.00 119.63 30.38 12.00 2.88 72.25 42.00 35.50 18.13

30.25 2.50 1.50 1.75 20.00 13.00 10.00 10.255000 13.25 35.75 6.50 13.56 15.25 30.75 77.25 6.00 126.38 36.13 13.00 2.88 72.25 48.75 35.50 16.63 YB2 29.88 51.385800 15.00 39.50 8.25 15.56 19.00 34.50 77.25 6.00 131.88 39.88 14.75 2.88 72.25 54.25 43.00 14.63 YB3 27.72 53.506800 17.50 43.25 13.75 18.06 19.00 38.25 77.25 7.00 141.13 43.63 20.25 2.88 72.25 63.50 43.00 12.13

21402145

2142or

2143

4450 13.00 36.50 5.75 12.56 18.00 . . . 94.50 6.00 136.75 37.00 5.25 3.50 88.50 41.75 42.00 22.3835.00 3.00 1.75 2.00 22.50 16.50 13.00 12.50

YB2YB3

31.6333.50

59.2557.50

5800 15.50 39.25 8.00 14.56 18.00 . . . 94.50 6.00 141.75 39.75 7.50 3.50 88.50 46.75 42.00 20.386800 17.50 47.25 10.25 17.06 21.75 41.25 88.00 7.00 152.00 47.75 16.25 3.50 82.00 63.50 49.50 17.88

21502155

2152or

2153

4450 13.00 36.50 5.50 13.56 18.00 . . . 101.00 6.00 143.25 37.00 5.25 3.50 95.00 41.75 42.00 22.3836.00 3.00 1.75 2.25 25.00 17.50 14.00 11.00

YB2YB3

32.5032.13

65.1365.58

5800 15.50 39.25 7.75 15.56 18.00 . . . 101.00 6.00 148.25 39.75 7.50 3.50 95.00 46.75 42.00 20.386800 17.50 47.25 10.00 18.06 21.75 41.25 94.50 7.00 158.50 47.75 16.25 3.50 88.50 63.50 49.50 17.88

� For Types GHB1 and YB4 selections, contact Factory.Bedplates fit type S motors only with 504 thru 688 frames; all types U, US, S, T, and TS with smaller frames.

BackstopsA positive method of preventing Reverse Rotation

Specify the Falk™ self-contained backstop for positive preventionof reverse rotation or backrun without backlash for conveyors,elevator head shafts, and similar applications. Grease-purgedseals are standard; features are identical to grease-purged sealsused on Falk™ gear drives.

Available as a standard accessory for Falk™ drives only. Thebackstop is designed to operate during overrunning within a speedrange of 400 to 1800 rpm and for creep drives between 100 and400 rpm no more than one hour per month. For continuousspeeds less than 400 rpm or greater than 1800 rpm, referapplication to Factory. The backstop can operate successfully onslope mounted applications up to a maximum shaft axis tilt of ±6°from horizontal; refer to Factory for other mountings. The backstopis designed to prevent reverse rotation five times or less in eighthours, with one minute or more in the overrunning directionbetween backstopping load applications. If backstoppingoperations are more frequent, or the time between operations isless than one minute, the backstop is classified as a working orindexing device and the application must be referred to Factory forselection. When ordering, specify rotation as determined whenfacing output shaft.

L.S. End Clearance

These housing dimensions are for reference in applications suchas kiln drives where clearance at the low speed end of the drivehousing is at a premium. The housing cover can be modified bythe Factory (when specified) to provide additional clearance bycutting the cover to the “minimum outline” and adding lifting lugsas illustrated.

To prevent damage to backstops due to incorrect motor shaftrotation at start up, couplings are NOT assembled when drives arefurnished with backstops. After completing the electricalconnection, check motor and drive shaft rotations. Then completealignment and assembly of coupling.

DO NOT use Falk™backstops in tandem. Refer to Factory allapplications involving the need for two or more backstops in onesystem. DO NOT use the backstop as a substitute for a brake.


H

C

G

8°

K

L

EF

J

10°

MINIMUMOUTLINE

LIFTINGLUGS

Z

DRIVESIZE

TYPE YB and YBT CLEARANCE DIMENSIONS – INCHES

C E F G H J K L Z

21402145 .25 9.25 14.13 1.50 26.44 1.50 7.00 3.19 21.63

21502155 .25 9.75 15.25 1.50 28.69 1.50 7.00 3.19 23.88

21602165 .50 11.25 17.63 1.50 32.94 1.50 7.00 3.19 27.63

21702175 .50 11.50 18.69 1.50 36.69 1.75 9.38 4.19 30.38

21802185 .50 12.50 20.13 1.50 40.19 1.75 9.38 4.19 33.50

21902195 .50 13.50 21.50 1.50 43.69 1.75 9.38 4.19 37.00

How to OrderThe following information is required to quote or ship to your requirements;

PRIME MOVER (a) Type.. . motor, engine (b) Horsepower (c)Output speed (d) Mounting position... if inclined. (e) Dimensions...if Rexnord is to furnish a bedplate, or coupling.

DRIVEN MACHINE (a) Kind ...agitator, kiln, etc. (b) Horsepowerload (c) Speed (d) Service . . . Hours per day and reversals perminute, if reversing. Unless specifically stated otherwise on thepurchase order, all drives (and backstops, if furnished) will beshipped with NLGI #2 grease in the seal housing cavities.

GEAR DRIVE (a) Type...GHB, YB, and YBT (b) Input speed (c)Output speed (d) Mounting position. . . (e) Drive with backstop:

When ordering a drive with backstop, indicate which shaftextension backstop is to be mounted per Specifications 246-911.Also, indicate the overrunning direction of rotation, which isdefined as clockwise or counterclockwise when facing the rotatingend of the low speed shaft extension. (f) Ambient temperature (g)Assembly number... see below.

SHAFT CONNECTIONS (a) Coupling... give shaft diameters andkey sizes for Falk™ coupling (b) Other: overhung loads. . . Givediameter and type of sheave, sprocket or pinion or thrust load, ifany.


YB4 Quadruple ReductionYB3 Triple Reduction

ALL SIZES

4142

4344

4546

4748

51 Std.50

5352

Std. 54

ALL SIZES

4142

4344

4546

4748

51 Std.

53

50

52

Std. 54

YB2 Double ReductionGHB1 Single Reduction

ALL SIZES

4144

4546

4750

51 Std52

53Std 54

SIZES 2050 thru 2070

41, 43, 45, 47, 49, (51 Std), 53 42,44,46,48,50,

52, (54 Std)SIZES 2080 thru 2135

41, 43, 45, 47, 49, 51, (53 Std) 42,44,46,48,50,

(52 Std), 54

For counterclockwise high speed shaft rotation,reverse all arrows.

Availability of Shaft Rotations for Above Assemblies

Assemblies and shaft rotations for right angle Types GHB and YB gear drives

Please specify from the plan views below, the desired assemblynumber. Overhung load capacities published on Pages 29 thru 32apply only to drive shaft extensions below the the heavy arrows.

Contact Factory for overhung load capacity of opposite shaftextension (which is less).

DRIVESIZES

Standard Assemblies(Standard Shafts)

Optional Assemblies

2050 - 2120 GHB12050 - 2195 YB22050 - 2195 YB32050 - 2070 YB4

2080-2135 YB4

� Contact Factory for overhung load ratings for low speed shafts without the heavy arrows and without outboard bearings. They are less than those published

H. S.SHAFT

L.S.SHAFT

L.S.SHAFT

H.S.SHAFT

OUTBOARDBEARING

ENDCOVER

L.S.SHAFTGUARD

L.S.SHAFT

OUTBOARDBEARING

ENDCOVER

L.S.SHAFTGUARD

L.S.SHAFT

THIS PAGE INTENTIONALLY LEFT BLANK

Rexnord Industries, LLC, Gear Group, 3001 West Canal Street, Milwaukee, WI 53208-4200 USA Phone: 866-REXNORD/866-739-6673 Fax: 414-643-3366

© 2007 Rexnord Industries, LLC

World Class Customer Service

For more than 100 years, the dedicated people of Rexnordhave delivered excellence in quality and service to ourcustomers around the globe. Rexnord is a trusted name whenit comes to providing skillfully engineered products thatimprove productivity and efficiency for industrial applicationsworldwide. We are committed to exceeding customerexpectations in every area of our business: product design,application engineering, operations, and customer service.

Because of our customer focus, we are able to thoroughlyunderstand the needs of your business and have the resourcesavailable to work closely with you to reduce maintenancecosts, eliminate redundant inventories and prevent equipmentdown time.

Rexnord represents the most comprehensive portfolio of powertransmission and conveying components in the world with thebrands you know and trust.

241-110 02/2007 Delzer Litho Printed in USA

Rexnord, A+Plus, Drive One, Steelflex and Ram are registered trademarks of Rexnord Industries,LLC. Falk and Magnum Seal are trademarks of Rexnord. All rights reserved.

falk™ series yb & ghb gear drives proven performance for

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