H-1

MORSE® HV DRIVE ADVANTAGES

Morse HV Drives provide the Drive Designer with a new concept in the transmission of power for high speed, high load applications. Proven in a wide range of applications from high production automobiles to custom-designed flood control pumps. HV Drives offer opportunity for flexibility, compactness, weight saving, and economy.

MORSE® HV DRIVES

HV Drives offer these design advantages:

• Fewer shafts and bearings than required for gears.• Lighter loads on shaft bearings.• Greater degree of elasticity than is available with gears, which helps to "cushion" the drive.• Center distance is less critical, and more flexible than with gears.• Gives long life on fixed centers . . usually eliminates need for adjustment.• Loading between shafts on drive is compressive permitting the use of smaller bearings

and lighter housing sections and materials.

DESIGN ADVANTAGES

RESULTS ... less weight, space, noise ... and less cost for parts and assembly.

• High Speed Performance• High Horsepower Small Space• Smooth• Quiet

DESIGN FEATURES

H-2

MORSE® HV DRIVE DESIGN

HV is a proven transmission drive with a design and capability entirely unique from the usual chain drive which combines the smoothness of a belt drive with the strength, compactness, economy, and long service life of a steel chain.The chain assembly is composed of a series of inverted tooth steel links, laced in alternate sections across the width of the chain. It is assembled with two steel pins having the same cross-section geometry, one called the pin and the other the rocker, which form the articulating link joint between the link sections. See page H-8 for chain dimensions.

WHAT IS HV?

The link design in the original HV pitches - 3/4, 1, 1 1/2 and 2 inch (Fig. 1) has been tested in practice and proven for many years. The link crotch is located slightly above the line of pull and all corners are rounded to minimize the possibility of stress risers and to help provide maximum performance on high load industrial application. With the introduction of 3/8 and 1/2 inch pitch chains (Fig. 2). Morse engineers developed a new link contour for increased speed requirements. This design for the two smaller pitches locates the link crotch below the line of pull. Photo-elastic studies of various link shapes and aperture positions produced the design with the lowest level of stress concentration. In addition, other research studies provided the results for proper metallurgy, toe length, back height, and pressure angle to achieve maximum load carrying capacity and high speed performance. Carefully controlled shot-peening of the links gives them a uniform, matte gray finish and results in the highest level of link fatigue resistance. Another reason for the HV high load performance.

HV LINK

Fig. 1 1 1/2 and 2 inch Pitches

Fig. 2 3/8, 1/2, 3/4 and 1 inch Pitches

1 1/2 and 2 inch Pitches

3/8, 1/2, 3/4 and 1 inch Pitches

H-3

MORSE® HV DRIVE DESIGN

The concentric pin and rocker joint is used in all pitches of HV chain. This joint (Fig. 3) in combination with the involute sprocket tooth design reduces chordal action to a minimum. The HV chain joint consists of a pin and rocker, each with identical cross-sections and concentric radii. In the process of the chain engaging sprocket teeth, the curved surfaces roll on one another thus reducing sliding friction and joint galling. Before the chain engages the sprocket teeth, the contact point of the HV pin and rocker remains below the pitch line (Fig. 4). As the chain engages the sprocket teeth, the contact point moves upward (Fig. 5) and the pitch of the chain elongates. The actual amount of pitch elongation is that required for the chain to wrap the sprocket along the pitch line.

CONCENTRIC PIN AND ROCKER JOINT

The third criteria for the success of HV is the mating sprockets which complete the drive. The involute tooth form differing from the straight sided teeth of conventional silent chain sprockets is designed for smooth engage-ment of the chain with the sprocket teeth. All HV sprockets are top-hobbed and the teeth heat treated for tough wear resistant surfaces. Unlike the single tooth engagement of spur gears, many teeth share the load of a HV drive. This load sharing of the sprocket teeth results in low stresses, less wear, and long sprocket life.

HV SPROCKETS

The compatible design of HV links, joints, and sprockets reduces the detrimental effects of chordal action to a minimum, the chordal action of conventional chain drives is the vibratory motion caused by the rise and fall of the chain as it engages sprocket teeth. This motion causes vibration and limits high speed load carrying capability. Of all types of chains, HV operates most efficiently at all speeds because chordal action is reduced to a minimum. Figure 6 shows how the HV chain enters approximately tangent to the pitch circle of the sprocket and maintains this position as it travels around the sprocket. This smooth HV engagement permits high speed capabilities with maximum efficiency and quietness.

CHORDAL ACTION

Fig. 3

Fig. 4

Fig. 5

H-4

MORSE®

HV DRIVE ADVANTAGES

The HV Drive link design, compensating pin and rocker joint and the involute hobbed sprockets add up to . .

YOU GET MORE WITH HV!

HIGH SPEED PERFORMANCE Normal operating range from 3,000 to 7,000 FPM with higher speed capability under special conditions.

HIGH HORSEPOWER IN A NARROW WIDTH HV Drive transmits more horsepower per width than any other chain or belt with range from low to several thousand horsepower.

SMOOTH PERFORMANCE The rolling action of chain joints and smooth chain-sprocket engagement does not induce vibrations.

HIGH EFFICIENCY Up to 99.7% efficiency means power loss is minimal.

QUIET-NOISELESS OPERATION The HV Drive operates much quieter on high speed applications than that of traditional chain drive or timing belt drives.

SEVEN good reasons to use HV Drive in your design! When gear trains of two or more meshes are needed to achieve center distance requirements-HV transfer cases provide weight and cost savings because:

1. FEWER SHAFTS and Bearings are required.

2. LIGHTER LOADS on Shaft Bearings.

3. CHAIN BEARING LOADS are compressive, placing case in com-pression. Gear forces are outward subjecting case to more stress.

4. ELASTICITY OF HV CHAIN accommodates normal thermal expansion, which helps "cushion" the drive.

5. CENTER DISTANCE IS LESS CRITICAL and more flexible than required by gear mesh

6. HV CASES ARE LIGHTER and the

7. SIMPLIFIED DESIGN results in a positive cost saving.

3/8, 1/2, 3/4 and 1 inch Pitches

• High Speed Performance• High Horsepower

Small Space• Smooth• Quiet

DESIGN FEATURES

H-5

MORSE® HV DRIVE COMPARISONS

The comparative rating curves show graphically the area of HV superior-ity over other types of chain and positive drive belts. The shaded area indicates that the capacity of HV far surpasses that of other power transmission drives because of its ...

• LOAD CARRYING CAPACITY• SMOOTHNESS• HIGH SPEED PERFORMANCE• QUIETNESS

POWER COMPARISON WITH OTHER DRIVES

HORSEPOWER CAPACITY - COMPARABLE DRIVES

HO

RSE

POW

ER P

ER IN

CH

OF

WID

TH

DRIVE SPEED — FEET PER MINUTE

C — Silent Chain (Morse® Silent Chain)1/2” Pitch, 5/8” Wide

B —

ANSI — American National Standards InstituteRMA — Rubber Manufacturers Association

#40 Roller Chain (ANSI)1/2” Pitch, One Strand

D — Timing Belt (RMA)1/2” Pitch, 5/8” Wide

HV EXCLUSIVE

0

15

30

45

60

75

90

105

120

1000 2000 3000 4000 5000 6000 7000 8000

A — HV Chain1/2” Pitch, 5/8” Wide

Consider the comparisons below. Higher and lower ratings and/or speed capabilities are possible with other pitches and widths

Chain or Belt from

Above GraphPeak

HPPeak feet/

Minutehorsepower

Per $ Quiteness Smoothness Flexibility Compactness

A (HV) 112 6,675 # 1 # 1 # 1 # 1 # 1

B (Roller Chain) 30 1,225 # 2 # 3 # 3 # 1 # 2

C (Silent Chain) 50 5,230 # 3 # 2 # 2 # 1 # 3

D (Timing Belt) 14 7,768 # 4 # 2 # 2 # 2 # 4

H-6

MORSE®

HV DRIVE APPLICATIONS

Photographs below and on the following page are examples of HV packaged drives, custom designed to meet particular space, speed and load requirements. HV packaged drives offer the designer. . .

PACKAGE HV DRIVES

• DESIGN SIMPLICITY• QUIET OPERATION• CASE COMPACTNESS• HIGH SPEED CAPABILITY• CENTER DISTANCE FLEXIBILITY• SMOOTH POWER TRANSFER

Power from a 125 HP, 3500 RPM electric motor is transmitted through a HV transfer case with self-contained lubrication system to a centrifugal blower at 3100 RPM over a 34 inch horizontal center distance. This drive operates 24 hours a day to provide smooth,quiet, maintenance free operation in a critical power plant application.

CENTRIFUGAL BLOWER DRIVE

Power from an auxiliary 465 HP rear of cab mounted diesel engine is directed downward through a two stage HV reduction unit with 4.85 to 1 total ratio to enable a drive shaft to pass forward under the cab to a snow auger and blower assembly. The characteristics of HV drives are particularly suited to this application because of their ability to transmit power smoothly in a minimum of space and absorb the heavy shocks encountered in highway snow removal.

HIGHWAY SNOW BLOWER DRIVEPower from a 1200 RPM natural gas engine is transmitted continuously thru a HV speed increaser with an integral lubrication system. The output of the case drives a centrifugal compressor absorbing 282 HP at 3600 RPM. A Morse® radial coupling connection on the input side of the case dampens engine torsional vibrations. The HV drive is quiet, highly efficient and allows for convenient layout of engine and compressor.

CENTRIFUGAL COMPRESSOR DRIVE

H-7

MORSE®

HV DRIVE APPLICATIONS

PACKAGE HV DRIVES

Power from V-8 engine is transmitted through a pair of HV packaged drives to provide full torque power take-off at a 1.24 to 1 reduction ratio for driving discharge water pumps. HV drive was selected because of low noise level, compact design, and high efficiency.

FIRE TRUCK-PUMP DRIVEThe output from a 45 HP air-cooled gasoline engine is reduced from 4400 RPM to 2750 RPM to drive the propeller of a low draft swamp boat. This ap-plication of a HV chain case resulted in increased propulsive efficiency through the use of a larger diameter, slower turning propeller which also contributed to reduced operating noise level.

SWAMP BOAT DRIVEThe combined power from two 500 HP automotive V-8 engines is transmitted thru a dual ratio HV drive to a single output shaft which drives a cable winch propelling full-sized passenger cars into a fixed barrier for crash evaluation and testing. Flexibility of HV case design provided the specific ratios in the center dis-tance and space requirements.

TEST STAND DRIVE

This HV transfer case drives the wheels of a 7-ton recreational vehicle. Power from a 454 cubic inch engine, thru a torque converter and a 3 speed transmission is transmitted by a Morse® HV transfer case with 370 Ibs. ft. max. torque at 2800 RPM. This HV drive was used because it offered the RV industry maximum space utilization while still satisfying heavy load requirements.

RECREATIONAL VEHICLEA pair of 1125 HP diesel engines are connected to input shafts of HV packaged drive. The dual 2.7 to 1 reduction ratio provides power to a single output shaft at 460 RPM to rotate a 66 inch diameter pump impeller. The HV drive was custom designed to meet limited space requirements.

DREDGE PUMP DRIVE

H-8

CHAIN PITCH INCHES

* A INCHES

HEIGHT OF CHAIN B

INCHES

3/8 .169 ± .004 .428 ± .002

1/2 .225 ± .004 .570 ± .002

3/4 .387 ± .006 .855 ± .003

1 .450 ± .008 1.140 ± .004

CHAIN PITCH INCHES

*A INCHES

HEIGHT OF CHAIN B

INCHES

1 1/2 .810 ± .010 1.645 ± .005

2 1.080 ± .012 2.193 ± .007

CHAIN NOMINAL

WIDTH INCHES

C D E

3/4 .685 .895 1.0291 .937 1.147 1.281

1 1/2 1.441 1.651 1.7852 1.945 2.155 2.2893 2.945 3.155 3.2894 3.945 4.155 4.2895 4.945 5.155 5.289

CHAIN PITCH INCHES

*WIDTH FOR FIRST INCH

C D E

3/4 .932 1.203 1.367

1 .892 1.785 1.545

1 1/2 .621 1.315 1.355

2 .508 1.400 1.422

MORSE®

HV DRIVE DIMENSIONS

MORSE® HV DRIVE DIMENSIONSPress Fit Guide Links

Type 63 - 139

3/8, 1/2, 3/4 AND 1 1 1/2 AND 2 INCH PITCH HV

*A = Height of chain above Nominal Pitch Diameter of Sprocket

3/8 AND 1/2 INCH PITCH HV CHAINS 3/4, 1 1/2 AND 2 INCH PITCH HV CHAINS

Press Fit Guide LinksType 61 - 115

* For widths greater than 1 in. add width desired minus 1 in. to above dimensions. Example: 3/4 pitch, 2 inch wide, the width between guides is 1.750 inches.

H-9

(1) HV

CHAIN DESIGNATION

(2) NOMINAL

WIDTH INCHES

AVERAGE ULTIMATE TENSILE STENGTH

IN POUNDS

AVERAGE WT. PER FOOT

IN POUNDS

3/8 INCH PITCH

HV-303 3/4 5,625 .65HV-304 1 7,500 .86HV-306 1 1/2 11,250 1.30HV-308 2 15,000 1.73HV-312 3 22,500 2.59

1/2 INCH PITCH

HV-404 1 10,000 1.15HV-406 1 1/2 15,000 1.73HV-408 2 20,000 2.30HV-412 3 30,000 3.45HV-416 4 40,000 4.60

3/4 INCH PITCH

HV-606 1 1/2 22,500 2.60HV-608 2 30,000 3.50HV-612 3 45,000 5.20HV-616 4 60,000 6.90HV-620 5 75,000 8.60

(1) HV

CHAIN DESIGNATION

(2) NOMINAL

WIDTH INCHES

AVERAGE ULTIMATE TENSILE STRENGTH

IN POUNDS

AVERAGE WT. PER FOOT

IN POUNDS

1 INCH PITCH

HV-808 2 40,000 4.60

HV-812 3 60,000 6.90

HV-816 4 80,000 9.20

HV-820 5 100,000 11.50

HV-824 6 120,000 13.80

1 1/2 INCH PITCH

HV-1212 3 90,000 10.40

HV-1216 4 120,000 13.80

HV-1220 5 150,000 17.30

HV-1224 6 180,000 20.70

2 INCH PITCH

HV- 1612 3 120,000 13.80

HV- 1616 4 160,000 18.40

HV- 1620 5 200,000 23.00

HV- 1624 6 240,000 27.60

MORSE®

HV DRIVE SELECTION

HV CHAIN

(1) Above chain sizes are stock in 10 ft. boxes. Each stock (10 ft.) and cut-to-length chains are supplied with one connecting pin set. Offset sections are not available. (2) Widths other than listed are available for special, approved applications.

1. Determine the R.P.M. and diameter of the high speed shaft.2. Determine the total horsepower to be transmitted.3. Determine proper service factor from table on page H-10.4. Establish Design Horsepower by multiplying total horsepower to

be transmitted by the proper service factor.5. Select the chain pitch and width and number of teeth in the small

sprocket from the Horsepower Rating Tables. a. Be sure the small sprocket will accommodate the high speed shaft diameter. b. If the high speed shaft diameter exceeds the maximum bore in the selected small sprocket it will be necessary either to increase the number of teeth in the sprocket or select the next larger pitch chain.

6. Determine the required ratio: RPM high speed shaft RPM slow speed shaft

7. Multiply the number of teeth in the small sprocket by the ratio to obtain the number of teeth in the large sprocket.

8. Turn to page H-11 to calculate chain length. HV drives use modified center distances to compensate for chain and sprocket tolerance as determined on page H-18.

HV DRIVE SELECTION

CAUTION: RELATIVE TO APPLICATIONS INVOLVING THE HANDLING OF PEOPLE, CONTACT APPLICATION ENGINEERING AT 800 626-2093 MUST BE CONSULTED PRIOR TO DRIVE SELECTION.

= Ratio

H-10

MORSE® HV DRIVE SELECTION

PRIME MOVER TYPE

Internal Combustion Engine with Hydraulic Coupling or Torque Converter Electric Motor A

Turbine Hydraulic Motor

Internal Combustion Engine with Mechanical Drive B

APPLICATIONTYPE OF

PRIME MOVER APPLICATIONTYPE OF

PRIME MOVER APPLICATIONTYPE OF

PRIME MOVERA B A B A B

AGITATORS CRUSHING MACHINERY PAPER INDUSTRY MACHINERY

(paddle or propeller) Ball mills, crushing rolls, jaw Agitators, bleachers 1.1 1.3 Pure liquid 1.1 1.3 crushers 1.6 1.8 Barker-mechanical 1.6 1.8 Liquids - variable density 1.2 1.4 DREDGES Beater, Yankee Dryer 1.3 1.5BAKER MACHINERY Conveyors, cable reels 1.4 1.6 Calendars, Dryer & Paper

Dough Mixer 1.2 - Jigs & screens 1.6 1.8 Machines 1.2 1.4BLOWERS SEE FANS CONSULT Chippers & winder drums 1.5 1.7BREWING & DISTILLING Cutter head drives MORSE PRINTING MACHINERY

EQUIPMENT Dredge pumps SEE PUMPS Embossing & flat bed presses,

Bottling Machinery 1.0 - FANS & BLOWERS folders 1.2 - Brew Kettles, cookers, mash Centrifugal, propeller, vane 1.3 1.5 Paper cutter, rotary press &

tubs 1.0 - Positive blowers (lobe) 1.5 1.7 linotype machine 1.1 - Scale Hopper-Frequent starts 1.2 - GRAIN MILL MACHINERY Magazine & newspaper

BRICK & CLAY EQUIPMENT Sifters, purifiers, separators 1.1 1.3 presses 1.5 - Auger nachines, cutting table 1.3 1.5 Grinders and hammer mills 1.2 1.4 PUMPS

Brick machines, dry press, & Roller mills 1.3 1.5 Centrifugal, gear, lobe & vane 1.2 1.4 granulator 1.4 1.6 GENERATORS & EXCITERS 1.2 1.4 Dredge 1.6 1.8 Mixer, pug mill, & rolls 1.4 1.6 MACHINE TOOLS Pipe line 1.4 1.6CENTRIFUGES 1.4 1.6 Grinders, lathes, drill press 1.0 - Reciprocating

COMPRESSORS Boring mills, milling machines 1.1 - 3 or more cyl. 1.3 1.5 Centrifugal & rotary (lobe) 1.1 1.3

MARINE DRIVES CONSULT MORSE

1 or 2 cyl. 1.6 1.8 Reciprocating RUBBER & PLASTICS

1 or 2 cyl. 1.6 1.8 MILLS INDUSTRY EQUIPMENT

3 or more 1.3 1.5 Rotary type: Calendar, rolls, tubers

CONSTRUCTION EQUIPMENT Ball, Pebble, Rod, Tube, Roller 1.5 1.7 Tire-building and

OR OFF-HIGHWAY VEHICLES Dryers, Kilns, & tumbling Banbury Mills 1.5 1.7 Drive line duty, power barrels 1.6 1.8 Mixers and sheeters 1.6 1.8 take-off, accessory CONSULT Metal Type: Extruders 1.5 1.7 drives MORSE Draw bench carriage & main SCREENS

CONVEYOR drive 1.5 - Conical & revolving 1.2 1.4 Apron, bucket, pan & elevator 1.4 1.6

Forming Machines CONSULT MORSE

Rotary, gravel, stone &

Belt (ore, coal, sand, salt) 1.2 1.4 vibrating 1.5 1.7 Belt-light package, oven 1.0 1.2 MIXERS STOKERS 1.1 - Screw & flight (heavy duty) 1.6 1.8 Concrete 1.6 1.8 TEST STANDS & CONSULTCRANES & HOISTS Liquid & Semi-liquid 1.1 1.3 DYNAMOMETERS MORSE Main hoist-medium duty 1.2 1.4 OIL INDUSTRY MACHINERY TEXTILE INDUSTRY

Main hoist-heavy duty, skip Compounding Units 1.1 1.3 Spinning frames, twisters,

hoist 1.4 1.6 Pipe line pumps 1.4 1.6 wrappers & reels 1.0 - Slush pumps 1.5 1.7 Batchers, calendars & looms 1.1 -

Draw works 1.8 2.0 Chillers, Paraffin filter presses,

Kilns 1.5 1.7

The Horsepower rating tables (pages H-12 and H-13) are for use un-der optimum drive conditions with a smooth power source and load. For less favorable conditions with moderate or heavy shock loads from either the power source and/or the load, the specified horsepower must be multiplied by a "Service Factor" (SF) to obtain a "Design Horsepower" (DHP). The "Design Horsepower" is used to obtain the chain selection from the rating tables. Recommendations are minimum and normal conditions are assumed.

SERVICE FACTORS

SERVICE FACTOR TABLE

H-11

MORSE®

HV DRIVE SELECTION

D K D K D K D K D K D K1 .03 32 25.94 63 100.54 94 223.82 125 395.79 156 616.442 .10 33 27.58 64 103.75 95 228.61 126 402.14 157 624.373 .23 34 29.28 65 107.02 96 233.44 127 408.55 158 632.354 .41 35 31.03 66 110.34 97 238.33 128 415.01 159 640.385 .63 36 32.83 67 113.71 98 243.27 129 421.52 160 648.466 .91 37 34.68 68 117.13 99 248.26 130 428.08 161 656.597 1.24 38 36.58 69 120.60 100 253.30 131 434.69 162 664.778 1.62 39 38.53 70 124.12 101 258.39 132 441.36 163 673.009 2.05 40 40.53 71 127.69 102 263.54 133 448.07 164 681.2810 2.53 41 42.58 72 131.31 103 268.73 134 454.83 165 689.6211 3.06 42 44.68 73 134.99 104 273.97 135 461.64 166 698.0012 3.65 43 46.84 74 138.71 105 279.27 136 468.51 167 706.4413 4.28 44 49.04 75 142.48 106 284.67 137 475.42 168 714.9214 4.96 45 51.29 76 146.31 107 290.01 138 482.39 169 723.4615 5.70 46 53.60 77 150.18 108 295.45 139 489.41 170 732.0516 6.48 47 55.95 78 154.11 109 300.95 140 496.47 171 740.6017 7.32 48 58.36 79 158.09 110 306.50 141 503.59 172 749.3718 8.21 49 60.82 80 162.11 111 312.09 142 510.76 173 758.1119 9.14 50 63.33 81 166.19 112 317.74 143 517.98 174 766.9020 10.13 51 65.88 82 170.32 113 323.44 144 525.25 175 775.7421 11.17 52 68.49 83 174.50 114 329.19 145 532.57 176 784.6322 12.26 53 71.15 84 178.73 115 334.99 146 539.94 177 793.5723 13.40 54 73.86 85 183.01 116 340.84 147 547.36 178 802.5724 14.59 55 76.62 86 187.34 117 346.75 148 554.83 179 811.6125 15.83 56 79.44 87 191.73 118 352.70 149 562.36 180 820.7026 17.12 57 82.30 88 196.16 119 358.70 150 569.93 181 829.8527 18.47 58 85.21 89 200.64 120 364.76 151 577.56 182 839.0428 19.86 59 88.17 90 205.18 121 370.86 152 585.23 183 848.2929 21.30 60 91.19 91 209.76 122 377.02 153 592.96 184 857.5830 22.80 61 94.25 92 214.40 123 383.22 154 600.73 185 866.9331 24.34 62 97.37 93 219.08 124 389.48 155 608.56 … ……

1. Divide the center distance in inches by pitch of chain obtaining . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C

2. Add teeth in the small sprocket (n) to the teeth in the larger sprocket (N) obtaining . . . . . . . . . . . . . . . . . . . . . . . . . . . S

3. Subtract the teeth in the small sprocket (n) from the teeth in the large sprocket (N) obtaining value of . . . . . . . . . . . . . . . . . . . . . . D

From the table below obtain the corresponding value of K

Chain length in pitches (L) = 2C + + Chain length must be determined to the nearest even number of pitches. Center distance will have to be recalculated (step 6).

4. Chain length in feet equals the chain length in pitches times the pitch in inches divided by 12.

5. After finding the chain length to the nearest number of even pitches from Step 4, the nominal center distance must be determined to three decimal places. Center distance tables should be used or contact Morse for this value of nominal center distance. The above formula for determining chain length cannot be used to solve for correct center distance.

6. With fixed center distance drives the modified center distance is determined as noted on Page I-18.

CHAIN LENGTH CALCULATIONSDetermine the chain length based on a given center distance and sprocket teeth as follows:

Note: (Relating to service factor) Recommendations are minimum and normal conditions are assumed.

Example Given: N = 60, n = 25, P = 1/2 inch. Center Distance (CD) = 24 inchesDetermine: (a) chain length (L) to nearest even number of pitches (b) determine the center distance based on actual number of pitches (L).Solution: (1) C = 24" ÷ 1/2 = 48 (2) S = (25 +60) = 85 (3) D = (60 - 25) = 35 corresponding K = 31.03 (4) L = (2 X 48) + 85 + 31.03 2 48 L = 139.15 + .85 = 140 pitches (nearest even number) (5) L (in feet) = 5.8333 feet (140 x 1/2 ÷12). (6) Nominal center distance must be obtained from center distance tables and in this instance CD in inches = 24.124. If center distance tables are not in your possession please contact Morse for correct CD calculation.

S K 2 C

H-12

MORSE® HV CHAIN HORSEPOWER RATING

3/8 INCH PITCH HP PER INCH OF WIDTH BASED ON NO. OF TEETH IN SMALL SPROCKET RPM No. TEETH

1200 1800 2400 3000 3600 4200 4800 5400 6000 6600 7200 7800 8400 9000 9600

19 19 28 37 45 54 62 69 76 83 89 94 99 102 105 10721 20 31 40 50 59 67 75 83 89 95 100 104 106 108 10823 22 33 44 54 64 73 81 88 95 100 104 107 108 10825 24 36 48 58 68 78 86 93 99 104 107 10827 26 39 51 63 73 83 91 98 103 107 10829 28 42 55 67 77 87 95 101 106 10831 30 44 58 70 82 91 99 104 108 10833 32 47 61 74 86 95 102 107 10835 34 50 65 78 89 98 105 10837 36 52 68 81 93 101 107 10839 38 55 71 85 96 104 10841 39 58 74 88 98 106 10843 41 60 77 91 101 107 108

1/2 INCH PITCH HP PER INCH OF WIDTH BASED ON NO. OF TEETH IN SMALL SPROCKET

RPM No. TEETH

900 1200 1500 1800 2100 2400 2700 3000 3600 4200 4800 5400 6000 6600 7200

19 28 38 47 56 65 74 83 91 107 122 136 148 159 167 17321 31 42 52 62 72 82 91 100 117 133 146 158 167 174 17823 34 46 57 68 78 89 99 108 126 142 155 166 174 17825 37 50 62 73 85 96 106 116 135 151 163 172 17827 40 53 66 79 91 102 114 124 143 158 170 17729 43 57 71 84 97 109 121 131 150 165 17431 46 61 76 90 103 116 127 138 156 170 17733 49 65 80 95 109 122 134 145 162 17435 52 69 85 100 114 128 140 151 167 17737 55 72 89 105 120 133 145 156 171 17839 58 76 94 110 125 139 151 161 17541 61 80 98 115 130 144 156 165 17743 63 83 102 119 135 149 160 169 178

3/4 INCH PITCH HP PER INCH OF WIDTH BASED ON NO. OF TEETH IN SMALL SPROCKET

RPM No. TEETH

600 900 1200 1500 1800 2100 2400 2700 3000 3300 3600 3900 4200 4500 4800

19 40 59 78 97 115 132 148 164 178 191 203 213 222 229 23421 44 65 86 106 126 144 161 177 192 205 216 225 231 236 23823 48 71 94 116 136 156 174 190 204 216 226 233 237 238 23625 52 77 101 125 147 167 185 201 215 225 233 237 238 235 22827 56 83 109 134 157 177 196 211 223 232 237 238 23429 60 89 116 142 166 187 205 220 230 237 238 23431 64 95 124 151 175 196 214 227 235 238 23533 68 100 131 159 184 205 221 232 238 237 22935 72 106 138 167 192 212 227 236 238 23237 76 112 145 174 199 219 232 238 23639 80 117 152 182 206 225 236 238 23141 84 123 158 188 213 229 238 23643 88 128 164 195 218 233 238 232

Preliminary drive selection of chain and sprockets may be obtained from the tables below. However, Morse suggests that all HV drive Selections be submitted to our Engineering Department for final confirmation. Since more than one pitch will work well in most situations it may

MORSE® HV CHAIN HORSEPOWER RATING TABLESbe desirable to make two or three choices and base final selection on the features most important in the design such as cost, stock chain and sprocket availability, size of drive, noise level (small pitches are quieter), loading (larger pitches carry greater load), and smoothness.

For best drive performance, use 25 teeth or more on small sprocket.Forced pump lubrication is recommended. Bath lubrication is satisfactory for applications to the left of the heavy line. For HP values at higher speeds than shown, consult Technical Services.

H-13

MORSE®

HV CHAIN HORSEPOWER RATING

1 INCH PITCH HP PER INCH OF WIDTH BASED ON No. OF TEETH IN SMALL SPROCKET

RPM No. TEETH

600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000 3300 3600

19 66 87 108 128 148 167 185 202 217 232 245 257 267 278 28621 72 96 119 141 162 182 201 218 234 248 261 271 279 287 28923 79 105 129 153 175 196 216 233 249 262 273 281 287 289 28425 86 113 140 165 188 210 230 247 262 273 282 287 289 284 26927 93 122 150 176 201 223 242 259 272 282 287 289 286 27229 99 130 160 187 213 235 254 269 280 287 289 286 27631 106 139 170 198 224 246 264 277 286 289 286 27633 112 147 179 208 234 255 272 283 289 287 27935 119 155 188 218 244 264 279 287 288 28237 125 163 197 227 253 272 284 289 285 27239 131 171 206 236 261 278 287 288 27941 138 178 214 244 268 283 289 28543 144 186 222 252 274 286 288 278

1 1/2 INCH PITCH HP PER INCH OF WIDTH BASED ON No. OF TEETH IN SMALL SPROCKET RPM No. TEETH

200 300 400 500 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600

19 36 53 70 88 104 136 166 193 216 236 250 260 263 261 25121 39 59 78 96 115 149 181 208 231 248 259 263 260 24723 43 64 85 105 125 162 194 222 243 257 263 260 24625 47 70 92 114 135 173 207 234 253 262 261 24927 50 75 99 122 144 185 218 244 259 263 25429 54 80 106 131 154 196 229 252 263 25931 58 86 113 139 163 206 238 258 263 25033 61 91 120 147 172 215 246 262 26035 65 96 126 155 181 224 253 263 25237 69 102 133 162 189 232 258 262 24139 72 107 140 170 197 239 261 25841 76 112 146 177 204 245 263 25243 80 117 152 184 212 251 263 242

2 INCH PITCH HP PER INCH OF WIDTH BASED ON No. OF TEETH IN SMALL SPROCKET RPM No. TEETH

200 300 400 500 600 700 800 900 1000 1100 1200 1400 1600 1800 2000

19 59 88 117 144 170 195 218 240 259 276 291 312 320 313 29021 65 97 128 158 186 212 237 258 277 293 306 319 315 29123 71 106 140 172 201 229 253 275 292 306 315 318 29925 78 115 151 185 216 244 269 289 304 315 319 30927 84 124 162 198 230 258 282 301 313 319 318 29129 90 133 173 210 243 271 294 310 318 319 31031 96 141 184 222 255 283 303 316 320 313 29633 102 150 194 233 267 293 311 319 317 30235 108 158 204 244 277 302 316 319 309 28537 114 166 214 254 287 309 319 316 29739 119 174 223 264 295 314 320 309 28141 125 182 232 273 302 318 317 29843 131 190 241 281 308 320 312 283

MORSE® HV CHAIN HORSEPOWER RATING TABLES (CONTINUED)

For best drive performance, use 25 teeth or more on small sprocket.Forced pump lubrication is recommended.Bath lubrication is satisfactory for applications to the left of the heavy line.For HP values at higher speeds than shown, consult Technical Services.

H-14

MORSE®

HV CHAIN SPECIFICATIONS

HV SPROCKET INFORMATION

SprocketsAre made for stock and Manufactured to order in accordance with Morse specifications. Are Hobbed with a generated involute tooth form. Have Hardened Teeth for wear resistance on tooth flanks.

MaterialsSprockets up to 15 inches diameter are usually made from bar steel with larger sprockets manufactured from plate steel, forged slugs, Meehanite or steel castings. The type of material can vary depending upon requirements for delivery, quantity, sprocket design, and price. For example: Sprockets over 15 inches diameter can be made from meehanite or steel castings but, require somewhat longer manu-facturing lead times for procurement of castings; if made of fabricated steel with welded hubs, shorter manufacturing lead times are realized but, the cost may be higher.

DimensionsNominal pitch and outside diameters-Pages H-15 and H-16.Maximum bores and hub diameters for sprocket sizes from 21 through 33 teeth. Face width dimensions.

TolerancesBore diameters, keyseats and concentricity. Tolerances closer than shown can be furnished if required. The need for closer tolerances should be carefully considered in light of increased costs.

Installation of sprockets

Performance informationFor maximum drive performance it is recommended that a minimum of 25 teeth be used in the small sprocket. However, it is permissible to use a minimum of 19 teeth in the small sprocket with reduced perfor-mance. Where drive design is under 25 teeth-consult Morse.For most drives, an odd number of teeth in one of the sprockets is recommended. The use of idler sprockets is not recommended in HV drives.Drives employing more than two sprockets per chain should be referred to Morse for review.

HV sprocket ordering informationSpecify number of teeth, pitch, chain width or sprocket face, hub, type (if required). Unless specified, the length thru bore (LTB), hub diameter (HD), keyway, setscrew and tolerances will be to Morse stan-dard specifications. Material of sprockets and tooth hardness will be to Morse standard specifications.

BASIC HUB TYPES

TYPE AFlush with face of sprocket

TYPE BHub one side

TYPE CHub located centrally with projection both sides or hub can be the same length as

sprocket face or offset as required.

H-15

MORSE®

HV CHAIN CHAIN 3/8" PITCH

3/4" FACE WIDTHNo.

TEETHCATALOG

No.PITCH DIA.

(in.)MIN. PLAIN

BOREMAX.BORE HD LTB APPROX.

WT.19 HV303B19 2.278 1/2 1 5/32 1 5/8 1 13/32 .921 HV303B21 2.516 1/2 1 9/32 1 7/8 1 13/32 1.223 HV303B23 2.754 1/2 1 3/8 2 1/8 1 13/32 1.525 HV303B25 2.992 3/4 1 5/8 2 3/8 1 13/32 1.8

27 HV303B27 3.230 3/4 1 3/4 2 5/8 1 13/32 2.229 HV303B29 3.468 3/4 1 13/16 2 7/8 1 13/32 2.631 HV303B31 3.707 3/4 2 1/8 3 3/32 1 13/32 3.138 HV303B38 4.541 3/4 2 7/8 3 15/16 1 13/32 5.0

42 HV303B42 5.018 3/4 3 5/16 4 13/32 1 13/32 6.3

57 HV303B57 6.807 1 1/4 4 1/2 6 1 13/32 11.7

76 HV303B76 9.074 1 1/4 4 1/2 6 1 13/32 16.7

1" FACE WIDTH19 HV304B19 2.278 1/2 1 5/32 1 5/8 1 5/8 1.121 HV304B21 2.516 1/2 1 9/32 1 7/8 1 5/8 1.423 HV304B23 2.754 1/2 1 3/8 2 1/8 1 5/8 1.825 HV304B25 2.992 3/4 1 5/8 2 3/8 1 5/8 2.1

27 HV304B27 3.230 3/4 1 3/4 2 5/8 1 5/8 2.629 HV304B29 3.468 3/4 1 13/16 2 7/8 1 5/8 3.131 HV304B31 3.707 3/4 2 1/8 3 3/32 1 5/8 3.638 HV304B38 4.541 3/4 2 7/8 3 15/16 1 5/8 5.8

42 HV304B42 5.018 3/4 3 5/16 4 13/32 1 5/8 7.457 HV304B57 6.807 1 1/4 4 1/2 6 1 5/8 13.776 HV304B76 9.074 1 1/4 4 1/2 6 1 5/8 20.6

1 1/2" FACE WIDTH19 HV306B19 2.278 1/2 1 5/32 1 5/8 2 5/32 1.521 HV306B21 2.516 1/2 1 9/32 1 7/8 2 5/32 1.923 HV306B23 2.754 1/2 1 3/8 2 1/8 2 5/32 2.425 HV306B25 2.992 3/4 1 5/8 2 3/8 2 5/32 2.8

27 HV306B27 3.230 3/4 1 3/4 2 5/8 2 5/32 3.429 HV306B29 3.468 3/4 1 13/16 2 7/8 2 5/32 4.131 HV306B31 3.707 3/4 2 1/8 3 3/32 2 5/32 4.838 HV306B38 4.541 3/4 2 7/8 3 15/16 2 5/32 7.8

42 HV306B42 5.018 3/4 3 5/16 4 13/32 2 5/32 9.757 HV306B57 6.807 1 1/4 4 1/2 6 2 5/32 18.276 HV306B76 9.074 1 1/4 4 1/2 6 2 5/32 28.9

HV SPROCKETS3/8" pitch

TYPE BTeeth Hardened HubProjection One Side

H-16

MORSE® HV CHAIN CHAIN 1/2" PITCH

1" FACE WIDTHNo.

TEETHCATALOG

No.PITCH DIA.

(in.)MIN. PLAIN

BOREMAX. BORE HD LTB APPROX.

WT.19 HV404B19 3.038 1/2 1 7/16 2 7/32 2 2.521 HV404B21 3.355 1/2 1 11/16 2 1/2 2 3.323 HV404B23 3.672 3/4 1 13/16 2 7/8 2 4.025 HV404B25 3.989 3/4 2 1/8 3 3/16 2 4.9

27 HV404B27 4.307 3/4 2 3/8 3 1/2 2 5.929 HV404B29 4.625 3/4 2 9/16 3 13/16 2 7.031 HV404B31 4.942 3/4 2 3/4 4 5/32 2 1/2 10.138 HV404B38 6.055 3/4 3 3/4 5 9/32 2 1/2 16.1

42 HV404B42 6.691 3/4 4 3/8 5 15/16 2 1/2 20.257 HV404B57 9.076 1 1/4 4 1/2 6 2 1/2 27.176 HV404B76 12.099 1 2 1/2 3 5/8 2 31.1

1 1/2" FACE WIDTH19 HV406B19 3.038 1/2 1 7/16 2 7/32 2 1/2 3.321 HV406B21 3.355 1/2 1 11/16 2 1/2 2 1/2 4.323 HV406B23 3.672 3/4 1 13/16 2 7/8 2 1/2 5.125 HV406B25 3.989 3/4 2 1/8 3 3/16 2 1/2 6.3

27 HV406B27 4.307 3/4 2 3/8 3 1/2 2 1/2 7.629 HV406B29 4.625 3/4 2 9/16 3 13/16 2 1/2 9.031 HV406B31 4.942 3/4 2 3/4 4 5/32 3 12.338 HV406B38 6.055 3/4 3 3/4 5 9/32 3 19.7

42 HV406B42 6.691 3/4 4 3/8 5 15/16 3 24.657 HV406B57 9.076 1 1/4 4 1/2 6 3 35.476 HV406B76 12.099 1 2 1/2 3 5/8 2 1/2 46.1

2" FACE WIDTH19 HV408B19 3.038 1/2 1 7/16 2 7/32 3 4.121 HV408B21 3.355 1/2 1 11/16 2 1/2 3 5.223 HV408B23 3.672 3/4 1 13/16 2 7/8 3 6.325 HV408B25 3.989 3/4 2 1/8 3 3/16 3 7.7

27 HV408B27 4.307 3/4 2 3/8 3 1/2 3 9.229 HV408B29 4.625 3/4 2 9/16 3 13/16 3 10.931 HV408B31 4.942 3/4 2 3/4 4 5/32 3 12.738 HV408B38 6.055 3/4 3 3/4 5 9/32 3 20.1

42 HV408B42 6.691 3/4 4 3/8 5 15/16 3 25.157 HV408B57 9.076 1 1/4 4 1/2 6 3 1/2 43.676 HV408B76 12.099 1 2 1/2 3 5/8 3 60.7

3" FACE WIDTH19 HV412B19 3.038 3/4 1 7/16 2 7/32 4 5.321 HV412B21 3.355 3/4 1 11/16 2 1/2 4 6.923 HV412B23 3.672 3/4 1 13/16 2 7/8 4 8.625 HV412B25 3.989 3/4 2 1/8 3 3/16 4 10.5

27 HV412B27 4.307 3/4 2 3/8 3 1/2 4 12.629 HV412B29 4.625 3/4 2 9/16 3 13/16 4 14.731 HV412B31 4.942 3/4 2 3/4 4 5/32 4 17.338 HV412B38 6.055 3/4 3 3/4 5 9/32 4 27.2

42 HV412B42 6.691 3/4 4 3/8 5 15/16 4 33.957 HV412B57 9.076 1 1/4 4 1/2 6 4 1/2 60.276 HV412B76 12.099 1 2 1/2 3 5/8 4 83.2

TYPE BTeeth Hardened HubProjection One Side

HV SPROCKETS

1/2" pitch

LTB

H-17

MORSE®

HV CHAIN DRIVES INSTALLATION

MORSE® HV CHAIN DRIVE INSTALLATION INFORMATION

HV chain and sprocket Installation - When cases for HV drives are not purchased from Regal and the design and manufacture is performed by others, certain basic guidelines must be followed to ensure proper drive perfor-mance. Morse® HV drive recommendations, ratings, and selection procedures in this catalog are premised on installation in a proper housing with alignment and installation as outlined in this section and lubrication as recommended on pages H-19 and H-20.

A. Case StructuresMorse® HV drives are normally employed on applications where high speed and/or high horsepower transmission is the requirement. The HV drive should be installed in rigid housings of welded steel or cast construction complete with shafts, bearings, seals, and a proper lubrication system in order to realize the full performance capability of the drive (Fig. 1). The connection or interface to driver and driven equipment is accomplished by flexible couplings, universal joints, or direct flanges. Morse offers the service of design and manufacture of such cases.

C. Sprocket OffsetOffset from the machined face of one sprocket to the corresponding face of the second sprocket (Fig. 3) should ideally be held to zero with the maximum permissible offset limited to the value "K" inches in table below. Excessive offset will cause wear on inside of guide links or possible chain failure if the chain guides climb the sprocket teeth.

B. Shaft ParallelismShafts must be parallel in two planes within .005 inch/foot of bearing 'mounting distance (Fig. 2). Special attention must be given to drives with non-horizontal shafts due to the tendency for chain to ride on the guide links. Applications with shafts other than the horizontal should be referred to Regal.

D. Sprocket MountingSprockets should have a light interference fit on shafts. Preferred fits can be obtained from the latest ANSI Standard B4.1 for Interference Locational Fits, Class LN3. Sprockets may be installed by heating the sprocket in 180°F oil, shrinking the shaft with dry ice or press-fitting with a hydraulic press. A positive mechanical connection is necessary for torque transmittal regardless of the type of sprocket fit to shaft. Sprockets with tapered bores or keyseats are satisfactory, however, Morse does not recommend the use of split-tapered bushings in mounting HV sprockets to shafts. It is recommended that each sprocket be located positively against a shoulder or step on the shaft for accurate positioning. With this style mounting, the use of type "A" (hubs flush) sprocket will provide the simplest design.

E. HV Chain InstallationHV chains can be furnished in the number of required pitches end-less or open for connection of the ends with a standard pin set. In some case designs, bearing carriers are large enough to install sprockets and endless chain through the openings. Other designs employ housings which are split at the shaft center to facilitate installation. If chain must be installed open refer to Figs. 1 thru 5 on page H-18.

CHAIN PITCH INCHES

3/81/2

3/4 1 1 1/2 2

K .022 .025 .031 .036 .044 .051

H-18

MORSE®

HV DRIVES INSTALLATION

MORSE® HV CHAIN DRIVE INSTALLATION INFORMATION (CONTINUED)

Bring ends of chain together ,on top of larger sprocket in mesh with sprocket teeth.

On pre-loaded, fixed center distance a hook-up tool similar to that shown may be used to bring the ends together.

When connecting the open ends with a pin set, it is very important that the longer pin of the set must seat nearest to the outside flank of the guide plate. For rivet type connectors: washers are used on both sides in chain pitches of 1 1/2 and 2 inches. Washers are not used in chain pitches of 3/8, 1/2, 3/8 and 1 inches.

Spirol pin type connectors are normally used for connecting open ended chains. Spirol Pin is driven into each end of pin with a drift.

F. Center DistanceOn large drive ratios (over 3:1) it is desirable to have at least 120 de-grees wrap on the small sprocket. On drives without center distance adjustment the center distance should be kept to a minimum. Minimum center distance is limited to half the sum of the pitch diameters. It is desirable to keep the center distance under 30 pitches. Drives with long center distances may require center distance adjustment to attain adequate wear life. Adjustable center distances should be limited to a maximum of 60 pitches of chain, and if a longer center distance is required a double reduction may be necessary. Center distance and sprocket combinations must always be selected to provide an even number of chain pitches. Nominal center distances should be calculated to three decimal places.

Center distance tables should be used or contact Regal for this value. HV center distances are modified to compensate for chain and sprocket tolerances. This modified center distance is obtained by adding .008 inch per foot of center distance to the nominal or theoretical flat pitch center distance. Center distance tolerance should be on the plus side.

G. HV Case ClearancesRadial Clearance - Where the chain fully wraps the sprockets, the desirable radial clearance beyond the pitch circle is 2 times the chain pitch. Minimum clearance sufficient to clear the chain in process of jumping a sprocket tooth is 1 1/8 times the pitch.

Sag Clearance - The case must be designed for clearance between the slack strand of chain and the inside of the case. For this clearance, use the formula below with value of "A" determined from graph (Fig. 6). For reversing drives, design with sag clearance both top and bottom.

Side Clearance - The side clearance beyond the width of the chain should be equal to or greater than one chain pitch.

Tangent Distance in Pitches

A =

Sag

Cle

aran

ce o

f Tan

gent

Dis

tanc

e

50

40

30

20

10

00 20 40 60 80 100 120 140

Sag Clearance(inches)

= A x Tangent Distance (inches)100

H-19

MORSE®

HV DRIVES LUBRICATION

HV CHAIN LUBRICATION

A. Pressure Lube SystemsExperience has shown that for chain speeds above 2500 FPM a pres-sure lubrication system is required. Proper lubrication is necessary to help provide satisfactory performance, chain wear life and to also lubricate the surfaces of chain and sprocket contact. The lubricant must penetrate the chain joints to dissipate frictional heat and flush out foreign particles.

The lubrication system should supply filtered oil under pressure to the spray pipes at the total rate of 1 GPM per inch of chain width. The lubricating pump with integral pressure relief valve can be driven directly from one of the case shafts or by means of a separate motor, or an existing supply of lubricating oil under pressure may be utilized. When utilizing a case driven oil pump, the oil reservoir or sump should have a minimum capacity of three minutes of oil flow. Spray pipes having 3/8" I.D. with one .093 inch diameter orifice per inch of chain width are adequate for most installations. Long center distanc-es or reversing drives may require an additional spray pipe. (A single .093 inch diameter orifice flows approximately .8 GPM of SAE 20W oil at 20 PSI.) The spray pipe is located so as to spray oil into and thru the chain as the slack strand enteres the sprocket (Fig. 2).

A replaceable element full flow oil filter with built in relief valve should be installed between the oil pump and spray pipe. The filter element should be capable of removing particles larger than 25 mi-crons. A pressure gauge or a low oil pressure switch with a warning device or light is recommended to protect the chain drive in the event of a malfunction in the lube system. Additional compo-nents should include an oil sump strainer for the oil pump suction line, and oil fill/breather, magnetic drain plug and an oil level sight gauge. Shaft bearings can be lubricated from the oil spray within the case or in some instances, separate lube lines may be required.

B. Bath LubricationAt chain speeds below 2500 FPM bath lubrication may be satisfac-tory. With bath lubrication, the dynamic oil level should be maintained at the lowest point of the pitch line, and for this purpose an oil level sight gauge is desirable. Too low an oil level is ineffective and too high a level will cause detrimental churning and heating of the oil. In some instances it may be necessary to provide baffles and troughs to direct oil into the chain. In some cases bearings may require separate lubrication.

C. Lubrication Oil SpecificationsSatisfactory HV chain case performance depends upon the use of well refined, high quality oil. As a guide to lubrication products, oils are designated by the letters SA, SB, and SC on the containers. These letters are service classifications established by the American Petroleum Institute (API). The designations are in addition to the SAE grades established by the Society of Automotive Engineers which indicate the viscosity of the oil recommended

Fig. 1 Pressure (Pump) Lubrication

Fig. 3 Bath Lubrication

H-20

MORSE® HV DRIVES MAINTENANCE

MAINTENANCE

For maximum performance use an oil conforming to one of the API classifications (Page H-19) with the proper SAE Grade number in accordance with the anticipated operating temperature

(See chart below). Oils that do not have both the SAE viscosity and recommended API designations on the container should not be used.

OIL VISCOSITY RECOMMENDATIONS

Where Application Requires Oil in Excess of SAE 20 Grade, Consult Morse Engineering for Recommendations.It is desirable to limit lube oil sump temperature to 180°F maximum to help prevent rapid deterioration of the oil. This can be accomplished by external cooling fans or a suitable oil cooler if necessary.Generally HV chains operate with a temperature rise of approximately 40°F above ambient temperature. If an oil cooler is installed as a part of the lubrication system, the SAE grade and equivalent viscosity (SSU) for the next lower ambient temperature range can be used. For example: If ambient room temperature is 95°F and oil cooler is not used, an SAE 20 oil 300 SSU @ 100°F with API service classification SA, SB, or SC should be used. If an oil cooler is provided an SAE 10, 200 SSU @ 100°F oil, Type A or B Automatic Transmission Fluid (ATF) can be used.

HV transfer caseThis HV transfer case is directly mounted on the tail shaft extension of an automatic transmission directing power to both front and rear axles of a cargo vehicle. The HV case has a 1.09:1 reduction ratio and transmits up to 1400 lb.-ft. torque at stall and 150 HP @ 4500 RPM with maximum chain speed of

6200 FPM. The lower weight of the HV case over comparable gear type case allowed increased vehicle payload.

Photograph below is an example of HV transfer case, custom designed to meet customer's requirements

Lubrication ChangesOil should be kept clean to help assure long, trouble free service. If oil becomes dirty or discolored or otherwise appears to be contami-nated, it should be drained, flushed and replaced. Good practice dictates that periodic oil changes should be made with the proper SAE viscosity and API classification every 1000 hours or every 4 months whichever occurs first. If Type A Automatic Transmission Fluid is used, it should be changed if the characteristic red coloring becomes a brownish color indicating oxidation in the oil. When oil is changed, the case should be drained, flushed with a suitable solvent (Mobil Oil Company*, Solvasol* or equivalent), and replaced with a new oil. The unit must be kept free of water and foreign material at all times. If water is found in the oil, more frequent oil changes may be required. Conversely, longer oil change intervals are possible if operating conditions are such that the oil does not deteriorate or become contaminated. The length of oil change intervals should be ascertained after a careful analysis of operating conditions and inspections of the oil. When making oil changes a thorough inspection of the lube system piping, pump, and spray pipe orifices should be made. The filter element should be replaced at this time if it is dirty. A good functioning oil system with clean oil of the correct type is necessary for long, quiet trouble free life of the HV drive and case.

SURROUNDING OR AMBIENT TEMP.

VISCOSITY SAE GRADE

VISCOSITY SAYBOLT SECONDS @ 100°F

Under 40°F *SAE 5 150 SSU

40° to 90°F *SAE 10 200 SSU

Over 90°F *SAE 20 300 SSU

*Type A or B Automatic Transmission Fluid (ATF) can also be used.

* Mobil and Solvasol are believed to be the trademark or trade name of Exxon Mobil Corporation. and are not controlled by Regal Beloit Corporation.

H-21

MORSE®

SILENT CHAIN DRIVES

MORSE® SILENT CHAIN DRIVES

MORSE® SILENT CHAIN provides an economical, compact drive with reduced loads and long life.

REGAL is your single source of supply for a full range of SILENT CHAIN DRIVES.All sprockets and chains are available when and where you need them. Available in standard pitches from 3/16" to 1" and in widths up to 6".

H-22

MORSE® SILENT CHAIN DRIVE FEATURES

FEATURES• 99% Efficient Drives• Economical• Simple Installation• Long Life• Space Saver• Reduced Bearing Loads• Smooth Drive• Quiet Drive• Cool Drive• Not Affected by Atmospheric Conditions• Adaptable to Your Centers• High Speeds• Minimum of Maintenance• Adaptable to Speed Changes• Positive Drive-No Slip• Wide Speed and H.P. Range

Morse® Silent Chain is an Inverted Tooth type drive offering particularly smooth, quiet power transmission at higher speeds up to 5000 FPM. The exclusive Morse Rocker Joint elimi-nates friction during chain articulation-permitting high rotative speed with less wear and heat.

All of the silent chains and sprockets listed are to the ANSI standard profile.

Chain designation listed as example SC 408, indicating: S.C.-Silent Chain standard link profile and guide 4-Pitch in 1/8" increments 08-Width in 1/4" incrementsAll sizes of chain and sprockets listed are of the Center Guide type except SC302.

Standards are not such that competitive chains may be connected together. They will, how-ever, individually run over the same set of standard sprockets.

Sprocket designation listed, as an example, 408-38: 4-Pitch in 1/8" increments 08-Width in 1/4" increments 38-Number of teeth

Offset link section

Adjustments of centers and an even number of pitches in the chain length are desirable characteristics for all chain drives. Centers should be selected which result in an even number of pitches in the chain length. When fixed centers necessitate the use of an odd number of pitches an offset link or hunting link may be used. As illustrated, this assembly, four pitches long, includes one row of offset links.

H-23

MORSE® SILENT CHAIN 3/16" PITCH

CHAIN No.

NOMINAL WIDTH

WIDTH OVER

RIVETS A

WIDTH BETWEEN

GUIDES B

ASSEM. LINKS

CONNECTING PIN ASSEMBLY WIDTH

HEIGHT OF CHAIN ABOVE

SPKT. P.D. F (MAX.)

AVERAGE ULTIMATE TENSILE

IN POUNDS

WEIGHT PER

FOOT IN POUNDSC D F

SC-0305 5/32 .200 3/32 2 & 3 1.08 .140 .248 .096 500 .07SC-0307 7/32 .263 5/32 3 & 4 .139 .171 .310 .096 750 .10

SC-0309 9/32 .325 7/32 4 & 5 .171 .201 .372 .096 1000 .12SC-0311 11/32 .388 9/32 5 & 6 .202 .232 .434 .096 1250 .15

SC-0315 15/32 .513 13/32 7 & 8 .264 .294 .558 .096 1750 .20SC-0319 19/32 .638 Center Guide 9 & 10 .327 .355 .682 .096 2250 .25

SC-0325 25/32 .825 Center Guide 12 & 13 .421 .448 .869 .096 3000 .33SC-0331 31/32 1.013 Center Guide 15 & 16 .514 .543 1.057 .096 3750 .40

Duplex chain will give a rugged positive drive with maximum service. Consult factory for recommendations and assemblies.

3/16 " PITCH SILENT CHAINThe Morse® 3/16" pitch silent chain drive is a high speed power transmission medium that offers the maximum in performance and reliability. Quietness and durability are the result of unique design and manufacturing practices. Materials are the finest alloy steels, properly heat treated to resist wear and fatigue. Chain link and sprocket profiles are in accordance with practices established by the chain industry. Morse 3/16" Silent Chain is available in non-corrosive types of materials. Morse 3/16" pitch Silent Chain is manufactured in three basic types of assembly to give complete coverage for all drive requirements. Eight standard widths handle load ranges and speeds with economy and long chain life.

JOINING PINInsertion of the pin and cotter allows simple field assembly of the chain.

CONNECTING LINKThe connecting link is used when chain is cut and as-sembled in the field. The connecting link consists of 1 pin link, inside link, 1 connector plate and 2 cotter pins.

Note: Use even number of pitches in chain. Offset or hunting links not available.

• For standard drives, side guide chain is recommended for all chains up to and including 15/32" wide (SCO315).

• For standard drives, center guide is recommended for all chains 19/32" (SCO319) and wider.

• For serpentine drives, reversing secondary shaft rotation, or if adjustable idler is required.

When cut length is specified pin and plate sets will be furnished at the per foot price. Cotter type joining pin or connecting link are available at an additional price.

H-24

MORSE®

SILENT CHAIN DRIVES 3/8", 1/2" 3/4" & 1" PITCH

3/8" PITCH

CHAIN No.

CHAIN NOMINAL

WIDTH

CHAIN WIDTH OVER

RIVETS

HEIGHT OF CHAIN ABOVE

SPKT. P.D. A (MIN.)

HEIGHT OF CHAIN

B (MAX.)

AVERAGE ULTIMATE TENSILE

IN POUNDS

WEIGHT PER FT.

IN POUNDS

SC 302* 1/2 .769 .188 .398 1875 .38SC 303 3/4 .895 .188 .398 2810 .56

SC 304 1 1.147 .188 .398 3750 .75SC 305 1 1/4 1.399 .188 .398 4690 .94

SC 306 1 1/2 1.651 .188 .398 5620 1.25SC 308 2 2.155 .188 .398 7500 1.50

1/2" PITCHSC 403 3/4 .895 .252 .529 5600 .75SC 404 1 1.147 .252 .529 7500 1.0SC 405 1 1/4 1.399 .252 .529 9300 1.25

SC 406 1 1/2 1.651 .252 .529 11200 1.50SC 408 2 2.155 .252 .529 15000 2.0SC 410 2 1/2 2.655 .252 .529 18700 2.50

SC 412 3 3.155 .252 .529 22500 3.0SC 414 3 1/2 3.655 .252 .529 26200 3.50

3/4" PITCHSC 606 1 1/2 1.700 .379 .795 16900 2.25SC 608 2 2.200 .379 .795 22500 3.0

SC610 2 1/2 2.700 .379 .795 28100 3.75SC 612 3 3.200 .379 .795 33800 4.50

SC 616 4 4.200 .379 .795 45000 6.0SC 620 5 5.200 .379 .795 56200 7.50

1" PITCHSC 812 3 3.235 .504 1.058 45000 6.0SC 816 4 4.235 .504 1.058 60000 8.0

SC 820 5 5.235 .504 1.058 75000 10.0SC 824 6 6.235 .504 1.058 90000 12.0

*Outside guide type chain. Distance between guides is .460.An offset link is not recommended unless chain needed is an uneven number of pitches. Example: 153 pitches, order 150 pitches and one offset link. An offset or hunting link is assembled without guide links. Price of offset links are added to the per foot price of chain. Stock Chain is supplied with one connecting link set. Additional connecting link sets sold only in package ("Poly-Pack") quantities. Package quantities: (25) for 3/8" and 1/2" pitch; (10) for 3/4" pitch: (5) for 1" pitch.

STOCK SILENT CHAIN

H-25

MORSE®

SILENT CHAIN DRIVES SELECTION

Engineering designThe following information should be considered to design long life, quiet, trouble free Silent Chain Drives:

• For long life, a minimum of 17 teeth and an odd number of teeth on one sprocket where possible.

• For maximum quietness, use sprockets with 23 teeth or more.

points to consider in selectionThere are certain primary conditions which affect the design of ef-ficient silent chain drives. Those most commonly encountered are:

1. The selection of wider chain than the minimum sizes recommended will give more than a corresponding return in service rendered. This is particularly true in drives where overloads are proportionately high.

2. Quieter drives result from designs employing a larger number of teeth in the drive sprocket. For quieter drives use a minimum of 23 teeth in the driver sprocket.

3. Larger pitches permit longer center distance.4. Center adjustment is always desirable. It is necessary with

vertical centers.

5. Fully enclosed drives with adequate lubrications are desirable for maximum service life and least maintenance.

6. An even number of pitches in the length of chain is desirable because offset link is eliminated.

7. With horizontal or inclined shaft centers, the tight or pulling strand may be either on the top or bottom when the center distance is equal or less than the sum of the sprocket diameters. For longer centers the tight strand should be on top.

8. Chain drives should be chosen on the basis of Horsepower rating rather than ultimate tensile strength.

9. Chain cases serve as guards for safety and protection. They confine lubrication to the area of the chain proper.

• For trouble free drives, apply service factor for design load.• On long or fixed center drives, use a sprocket or shoe idler, placed

where greatest amount of slack accumulates.• Do not reduce wrap on small sprockets with idler.• Engineering is available to you for review of your chain drive

design.

selection of silent chain drives1. Determine the R.P.M. and diameter of the high speed shaft.2. Determine the total horsepower to be transmitted.3. Determine proper service factor from table.4. Establish Design Horsepower by multiplying total horsepower to

be transmitted by the proper service factor.5. Select the chain pitch and width and number of teeth in the small

sprocket from the Horsepower Rating Tables.6. a. Be sure the small sprocket will accommodate the high

speed shaft diameter.7. b. If the high speed shaft diameter exceeds the maximum

bore in the selected small sprocket it will be necessary either to increase the number of teeth in the sprocket or select the next larger pitch chain.

8. Determine the required ratio: RPM high speed shaft RPM slow speed shaft

9. Multiply the number of teeth in the small sprocket by the ratio to obtain the number of teeth in the large sprocket.

10. Turn to page I-23 to calculate chain length.

CAUTION: RELATIVE TO APPLICATION INVOLVING THE HANDLING OF PEO-PLE, ENGINEERING MUST BE CONSULTED PRIOR TO DRIVE SELECTION.

= Ratio

H-26

MORSE®

SILENT CHAIN DRIVES SERVICE FACTORS

PRIME MOVER TYPE Internal Combustion Engine with

A Hydraulic Coupling or Torque Converter Electric Motor Turbine Hydraulic Motor

Internal Combustion Engine with Mechanical Drive B

APPLICATIONTYPE OF

PRIME MOVER APPLICATIONTYPE OF

PRIME MOVER APPLICATIONTYPE OF

PRIME MOVERA B A B A B

AGITATORS CRUSHING MACHINERY PAPER INDUSTRY MACHINERY(paddle or propeller) Ball mills, crushing rolls, jaw Agitators, bleachers 1.1 1.3 Pure Liquid 1.1 1.3 crushers 1.6 1.8 Barker-mechanical 1.6 1.8 Liquids-variable density 1.2 1.4 DREDGES Beater, Yankee Dryer 1.3 1.5BAKER MACHINERY Conveyors, pumps, cable reels 1.4 1.6 Calendars, Dryer & Paper Dough Mixer 1.2 - Jigs & screens 1.6 1.8 Machines 1.2 1.4BLOWERS SEE FANS

Cutter head drives CONSULT MORSE

Chippers & winder drums 1.5 1.7

BREWING & DISTILLING PRINTING MACHINERYEQUIPMENT Dredge pumps SEE PUMPS Embossing & flat bed presses, Bottling Machinery 1.0 - FANS & BLOWERS folders 1.2 - Brew Kettles, cookers, mash Centrifugal, propeller, vane 1.3 1.5 Paper cutter, rotary press & tubs 1.0 - Positive blowers (lobe) 1.5 1.7 linotype machine 1.1 - Scale Hopper-Frequent starts 1.2 - GRAIN MILL MACHINERY Magazine & newspaperBRICK & CLAY EQUIPMENT Sifters, purifiers, separators 1.1 1.3 presses 1.5 - Auger machines, cutting table 1.3 1.5 Grinders and hammer mills 1.2 1.4 PUMPS Brick machines, dry press, & Roller mills 1.3 1.5 Centrifugal, gear, lobe & vane 1.2 1.4 granulator 1.4 1.6 GENERATORS & EXCITERS 1.2 1.4 Dredge 1.6 1.8 Mixer, pug mill, & rolls 1.4 1.6 MACHINE TOOLS Pipe line 1.4 1.6CENTRIFUGES 1.4 1.6 Grinders, lathes, drill press 1.0 - ReciprocatingCOMPRESSORS Boring mills, milling machines 1.1 - 3 or more cyl. 1.3 1.5 Centrifugal & rotary (lobe) 1.1 1.3

MARINE DRIVES CONSULT MORSE

1 ore 2 cyl. 1.6 1.8

Reciprocating RUBBER & PLASTICS 1 or 2 cyl. 1.6 1.8 MILLS INDUSTRY EQUIPMENT 3 or more 1.3 1.5 Rotary type: Calendars, rolls, tubersCONSTRUCTION EQUIPMENT Ball, Pebble, Rod, Tube, Roller 1.5 1.7 Tire-building andOR OFF-HIGHWAY VEHICLES Dryers, Kilns, & tumbling Banbury Mills 1.5 1.7 Drive line duty, power barrels 1.6 1.8 Mixers and sheeters 1.6 1.8 take-off, accessory CONSULT Metal type: Extruders 1.5 1.7 drives MORSE Draw bench carriage & main SCREENSCONVEYOR drive 1.5 - Conical & revolving 1.2 1.4 Apron, bucket, pan & elevator 1.4 1.6

Forming Machines CONSULT MORSE

Rotary, gravel, stone & Belt ( ore, coal, sand, salt) 1.2 1.4 vibrating 1.5 1.7

Belt-light package, oven 1.0 1.2 MIXERS STOKERS 1.1 - Screw & flight (heavy duty) 1.6 1.8 Concrete 1.6 1.8 TEST STANDS & CONSULT

MORSECRANES & HOISTS Liquid & Semi-liquid 1.1 1.3 DYNAMOMETERS Main hoist-medium duty 1.2 1.4 OIL INDUSTRY MACHINERY TEXTILE INDUSTRY Main hoist-heavy duty,skip Componding Units 1.1 1.3 Spinning frames, twisters, hoist 1.4 1.6 Pipe line pumps 1.4 1.6 wrappers & reels 1.0 -

Slush pumps 1.5 1.7 Batchers, calendars & looms 1.1 - Draw works 1.8 2.0 Chillers, Paraffin filter presses, Kilns 1.5 1.7

service factorsThe Horsepower rating tables (pages I-24 and I- 25) are for use under optimum drive conditions with a smooth power source and load. For less favorable conditions with moderate or heavy shock loads from either the power source and/or the load, the specified horsepower must be multiplied by a "Service Factor" (SF) to obtain a "Design Horsepower" (DHP). The "Design Horsepower" is used to obtain the chain selection from the rating tables.Service Factors are selected below for various applications after first determining the prime mover or power source type. Note: (Relating to Service Factors). Recommendations are minimum and normal condi-tions are assumed.

SERVICE FACTOR TABLE

H-27

MORSE®

SILENT CHAIN DRIVES CHAIN LENGTH CALCULATION

D K D K D K D K D K D K1 .03 32 25.94 63 100.54 94 223.82 125 395.79 156 616.442 .10 33 27.58 64 103.75 95 228.61 126 402.14 157 624.373 .23 34 29.28 65 107.02 96 233.44 127 408.55 158 632.354 .41 35 31.03 66 110.34 97 238.33 128 415.01 159 640.385 .63 36 32.83 67 113.71 98 243.27 129 421.52 160 648.466 .91 37 34.68 68 117.13 99 248.26 130 428.08 161 656.597 1.24 38 36.58 69 120.60 100 253.30 131 434.69 162 664.778 1.62 39 38.53 70 124.12 101 258.39 132 441.36 163 673.009 2.05 40 40.53 71 127.69 102 263.54 133 448.07 164 681.2810 2.53 41 42.58 72 131.31 103 268.73 134 454.83 165 689.6211 3.06 42 44.68 73 134.99 104 273.97 135 461.64 166 698.0012 3.65 43 46.84 74 138.71 105 279.27 136 468.51 167 706.4413 4.28 44 49.04 75 142.48 106 284.67 137 475.42 168 714.9214 4.96 45 51.29 76 146.31 107 290.01 138 482.39 169 723.4615 5.70 46 53.60 77 150.18 108 295.45 139 489.41 170 732.0516 6.48 47 55.95 78 154.11 109 300.95 140 496.47 171 740.6017 7.32 48 58.36 79 158.09 110 306.50 141 503.59 172 749.3718 8.21 49 60.82 80 162.11 111 312.09 142 510.76 173 758.1119 9.14 50 63.33 81 166.19 112 317.74 143 517.98 174 766.9020 10.13 51 65.88 82 170.32 113 323.44 144 525.25 175 775.7421 11.17 52 68.49 83 174.50 114 329.19 145 532.57 176 784.6322 12.26 53 71.15 84 178.73 115 334.99 146 539.94 177 793.5723 13.40 54 73.86 85 183.01 116 340.84 147 547.36 178 802.5724 14.59 55 76.62 86 187.34 117 346.75 148 554.83 179 811.6125 15.83 56 79.44 87 191.73 118 352.70 149 562.36 180 820.7026 17.12 57 82.30 88 196.16 119 358.70 150 569.93 181 829.8527 18.47 58 85.21 89 200.64 120 364.76 151 577.56 182 839.0428 19.86 59 88.17 90 205.18 121 370.86 152 585.23 183 848.8929 21.30 60 91.19 91 209.76 122 377.02 153 592.96 184 857.5830 22.80 61 94.25 92 214.40 123 383.22 154 600.73 185 866.9331 24.34 62 97.37 93 219.08 124 389.48 155 608.56 … ……

1. Divide center distance in inches by pitch of chain, obtaining . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C2. Add teeth in small sprocket to teeth in large sprocket, obtaining . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S3. Subtract teeth in small sprocket from teeth in large sprocket,

obtaining Value D. From table obtain the corresponding value of . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . K

4. Chain length in pitches = 2C + +

5. Multiply length by pitch of chain to find chain length in inches.

calculation of chain lengthThe following method of calculating approximate chain length may be used for both standard roller chain, silent, and HV drives.

ExampleGiven: Teeth in driving sprocket..................................................21T Teeth in driven sprocket...................................................60T Pitch of chain...................................................................1/2" Center distance................................................................24"Required: Necessary length of chain

Solution: (1) C = 24" ÷ 1/2 = 48 (2) S = (21 + 60) = 81 (3) D = (60 - 21) = 39 corresponding K = 38.53

(4) Chain length in pitches = The next higher whole number is 138 pitches. (5) 138 X 1/2 = 69".

A chain cannot contain the fractional part of a pitch; therefore, in case the figure for the number of pitches for the chain length ob-tained from the use of the above formula contains a fractional part of a pitch, use the next higher whole number of pitches.

Whenever possible, use an even number of pitches in the chain length. An odd number of pitches requires the use of an offset link which is not generally desirable. The above formula for calculating chain length cannot be used to calculate center distance dimensions.

81 38.53(2 X 48) + + =

2 48

S K

2 C

H-28

MORSE®

SILENT CHAIN HORSEPOWER RATING

3/16" PITCH HORSEPOWER PER INCH OF WIDTH

No. OFREVOLUTION PER MINUTE-SMALL SPROCKET

No. OFTEETH TEETHSMALL

500 600 700 800 900 1200 1800 2000 3500 5000 7000 9000SMALL

SPROCKET SPROCKET15 .28 .33 .38 .43 .47 .60 .80 .90 1.33 1.66 1.94 1.96 15

17 .33 .39 .44 .50 .55 .70 .96 1.05 1.60 2.00 2.40 2.52 17

19 .37 .43 .50 .55 .61 .80 1.10 1.20 1.80 2.30 2.76 2.92 19

21 .41 .48 .55 .62 .68 .87 1.22 1.33 2.03 2.58 3.12 3.35 21

23 .45 .53 .60 .68 .75 .96 1.35 1.47 2.25 2.88 3.50 3.78 23

25 .49 .58 .66 .74 .82 1.05 1.47 1.60 2.45 3.13 3.80 4.10 25

27 .53 .62 .71 .80 .88 1.15 1.58 1.72 2.63 3.35 4.06 4.37 27

29 .57 .67 .76 .86 .95 1.21 1.70 1.85 2.83 3.61 4.40 4.72 29

31 .60 .72 .81 .91 1.01 1.30 1.81 1.97 3.02 3.84 4.66 5.00 31

33 .64 .75 .86 .97 1.07 1.37 1.90 2.08 3.17 4.02 4.85 - 33

35 .68 .80 .92 1.03 1.14 1.45 2.03 2.21 3.41 4.27 5.16 - 35

37 .71 .84 .96 1.08 1.19 1.52 2.11 2.30 3.48 4.39 5.24 - 37

40 .77 .91 1.04 1.16 1.29 1.64 2.28 2.50 3.77 4.76 - - 40

45 .86 1.02 1.15 1.30 1.43 1.83 2.53 2.75 4.15 5.21 - - 45

50 .95 1.12 1.27 1.37 1.58 2.00 2.78 3.02 4.52 5.65 - - 50

Oil cup or brush lubrication

Bath or Splash lubrication Pump lubrication

Consult your engineering department for proper method of lubrication

3/8" PITCH HP PER INCH OF WIDTH BASED ON No. OF TEETH IN SMALL SPROCKET

RPM No. TEETH

300 600 1200 1800 2400 3000 3600 4200 4800 5400 6000 6600 7200 7800 8400

19 2.4 4.8 9.6 14 19 23 27 31 34 37 39 41 42 43 42

21 2.7 5.4 11 16 21 25 29 33 36 39 41 42 43 42 40

23 2.9 5.9 12 17 22 27 32 35 39 39 42 43 42 40

25 3.2 6.4 13 19 24 29 34 37 40 39 43 42 40

27 3.4 6.9 14 20 26 31 36 39 41 39 42 40

29 3.7 7.4 15 21 28 33 37 40 42 39 41 37

31 4 7.9 16 23 29 35 39 41 43 39 38

33 4.2 8.4 16 24 31 36 40 42 42 40

35 4.5 8.9 17 25 32 37 41 43 42 38

37 4.7 9.4 18 27 33 39 42 42 40

39 5 9.9 19 28 35 40 42 42 38

41 5.2 10 20 29 36 41 43 41

43 5.5 11 21 30 37 41 42 40

Silent chain horsepower rating tables

Silent chain horsepower rating tables

Forced pump lubrication is recommended.Bath lubrication is satisfactory for applications to the left of heavy line.For HP values at higher speeds than shown, consult Engineering.

H-29

MORSE®

SILENT CHAIN HORSEPOWER RATING

1/2 INCH PITCH HP PER INCH OF WIDTH BASED ON No. OF TEETH IN SMALL SPROCKET

RPM No. TEETH

300 600 900 1200 1500 1800 2100 2400 2700 3000 3600 4200 4800 5400 6000

19 5.4 11 16 21 27 32 37 41 46 50 58 65 71 76 78

21 6 12 18 24 29 35 40 45 50 55 63 70 75 78 79

23 6.5 13 19 26 32 38 43 49 54 59 67 73 78 79 78

25 7.1 14 21 28 34 41 47 52 58 63 71 76 79 79

27 7.7 15 23 30 37 44 50 56 61 66 74 78 79

29 8.2 16 24 32 40 47 53 59 65 69 76 79 78

31 8.8 17 26 34 42 49 56 62 68 72 78 79

33 9.4 19 28 36 44 52 59 65 70 74 79 78

35 9.9 20 29 38 47 55 62 68 73 76 79

37 10 21 31 40 49 57 64 70 75 78 79

39 11 22 32 42 51 60 67 72 76 79 78

41 12 23 34 44 54 62 69 74 78 79

43 12 24 35 46 56 64 71 76 79 79

3/4 INCH PITCH HP PER INCH OF WIDTH BASED ON No. OF TEETH IN SMALL SPROCKET

RPM No. TEETH

200 400 600 900 1200 1500 1800 2100 2400 2700 3000 3300 3600 3900 4200

19 6.7 13 20 30 39 48 56 64 71 77 82 85 88 89 89

21 7.4 15 22 33 43 52 61 69 76 81 86 88 89 89 86

23 8.1 16 24 36 46 57 66 74 80 85 88 89 88 85

25 8.8 18 26 38 50 61 70 78 84 88 89 88 85

27 9.5 19 28 41 54 65 74 81 87 89 89 85

29 10 20 30 44 57 68 78 84 88 89 86 80

31 11 22 32 47 60 72 81 87 89 88 82

33 12 23 34 50 63 75 83 88 89 85

35 12 24 36 52 66 78 86 89 88 81

37 13 26 38 55 69 80 87 89 85

39 14 27 40 57 72 83 89 89 82

41 14 28 42 60 75 85 89 87

43 15 30 44 62 77 86 89 84

1 INCH PITCH HP PER INCH OF WIDTH BASED ON No. OF TEETH IN SMALL SPROCKET

RPM No. TEETH

200 400 600 800 1000 1200 1400 1600 1800 2000 2200 2400 2600 2800 3000

19 11 21 31 41 51 60 68 75 82 88 93 96 99 100 99

21 12 23 34 45 55 65 74 81 88 93 97 99 99 98 95

23 13 25 37 49 60 70 79 86 92 97 99 99 98 93 86

25 14 27 41 53 64 75 83 91 96 99 99 97 93 85

27 15 30 44 57 69 79 88 94 98 100 98 93 84

29 16 32 47 60 73 83 91 97 99 99 94 85

31 17 34 50 64 77 87 94 99 99 96 88

33 18 36 53 67 80 90 97 99 98 91

35 19 38 55 71 83 93 98 99 95 85

37 20 40 58 74 87 95 99 98 90

39 22 42 61 77 89 97 99 95 84

41 23 44 64 80 92 98 99 92

43 24 46 66 83 94 99 97 87

silent chain horsepower rating tables

Forced pump lubrication is recommended.Bath lubrication is satisfactory for applications to the left of heavy line.For HP values at higher speeds than shown, consult Engineering.

H-30

MORSE®

SILENT CHAIN SPROCKETS 3/16" PITCH

No. OF TEETH

MAX. HUB DIAMETER

MAX. BORE

No. OF TEETH

MAX. HUB DIAMETER

MAX. BORE

No. OF TEETH

MAX. HUB DIAMETER

MAX. BORE

11 .415 1/4 19 .899 9/16 27 1.365 15/16

12 .474 9/32 20 .949 5/8 28 1.425 1

13 .533 11/32 21 1.008 11/16 29 1.484 1

14 .593 3/8 22 1.068 3/4 30 1.544 1 1/16

15 .652 13/32 23 1.127 13/16 31 1.603 1 1/16

16 .711 15/32 24 1.186 13/16 32 1.663 1 1/8

17 .770 1/2 25 1.246 7/8 33 1.723 1 1/4

18 .830 9/16 26 1.306 7/8 34 1.782 1 1/4

Maximum Hub Diameter = Pitch Diameter - .250

3/16 " pitch drives

SprocketsAll 3/16" pitch silent chain sprockets are supplied, made-to-order, to customer specification. They are normally manufactured from steel although large quantities may be furnished in gray cast iron. Steel sprockets may be hardened at extra cost.To order, specify: quantity, chain size and/or nominal width, number of teeth, hub type and dimensions, bore size, keyseat, setscrews, and any special instructions.

Sprocket face width

NOMINAL WIDTH OF

CHAIN

ASSEMBLY OF

LINKS

WIDTH OF SPROCKET FACE

OUTSIDE GUIDE TYPE

CENTER GUIDE TYPE

5/32 2 & 3 .0757/32 3 & 4 .138

9/32 4 & 5 .20111/32 5 & 6 .264

15/32 7 & 8 .39019/32 9 & 10 .516 .625

25/32 12 & 13 .705 .81331/32 15 & 16 .894 1.000

Drive lubricationHorsepower Rating table indicates the various lubrication ranges for types of lubrication. A good grade of mineral oil of medium consistency is recommended. A number of applications have been successful with the use of colloidal graphite where normal lubrica-tion cannot be employed. Consult your Morse Sales Engineer for assistance in very special applications.

Our tiniest Morse chain gives positive drives up to 10,000 rpm !Tiny, but with the strength of steel, this highly efficient 3/16"-pitch Silent Chain transmits power as smoothly as a belt at speeds up to 10,000 rpm. It's available in every standard style: shroud, center guide, or duplex. Special chain materials are available for use in cor-rosive or extremely wearing conditions.

For Outside Guide For Duplex Chain

For Center Guide

H-31

MORSE®

SILENT CHAIN SPROCKETS 3/16" PITCH

3/16" pitch silent chain sprocket diameters

No. OF

TEETH

PITCH DIA.

OUT- SIDE DIA.*

OVER PIN

DIA.†

No. OF

TEETH

PITCH DIA.

OUT- SIDE DIA.*

OVER PIN

DIA.†

No. OF

TEETH

PITCH DIA.

OUT- SIDE DIA.*

OVER PIN

DIA.†11 .665 .632 .691 75 4.478 4.467 4.546 139 8.296 8.288 8.36612 .724 .694 .761 76 4.537 4.526 4.606 140 8.356 8.348 8.42713 .783 .755 .821 77 4.597 4.586 4.665 141 8.416 8.408 8.48714 .843 .815 .888 78 4.657 4.646 4.726 142 8.475 8.467 8.54615 .902 .876 .946 79 4.716 4.705 4.785 143 8.535 8.527 8.605

16 .961 .937 1.012 80 4.776 4.765 4.846 144 8.595 8.587 8.66617 1.020 .996 1.069 81 4.836 4.825 4.905 145 8.654 8.646 8.72418 1.080 1.057 1.134 82 4.895 4.884 4.965 146 8.714 8.706 8.78519 1.139 1.116 1.191 83 4.955 4.944 5.024 147 8.774 8.766 8.84420 1.199 1.177 1.256 84 5.015 5.004 5.085 148 8.833 8.826 8.904

21 1.258 1.237 1.312 85 5.074 5.063 5.143 149 8.893 8.885 8.96322 1.318 1.298 1.377 86 5.134 5.124 5.204 150 8.953 8.945 9.02423 1.377 1.357 1.433 87 5.194 5.184 5.263 151 9.012 9.004 9.08224 1.436 1.417 1.497 88 5.253 5.243 5.323 152 9.072 9.064 9.14325 1.496 1.477 1.554 89 5.313 5.303 5.382 153 9.132 9.124 9.202

26 1.556 1.538 1.617 90 5.373 5.363 5.443 154 9.191 9.184 9.26227 1.615 1.597 1.674 91 5.432 5.422 5.501 155 9.251 9.244 9.32128 1.675 1.657 1.737 92 5.492 5.482 5.562 156 9.311 9.303 9.38229 1.734 1.717 1.795 93 5.552 5.542 5.621 157 9.370 9.363 9.44130 1.794 1.777 1.857 94 5.611 5.601 5.681 158 9.430 9.423 9.501

31 1.853 1.836 1.914 95 5.671 5.661 5.740 159 9.490 9.483 9.56032 1.913 1.897 1.977 96 5.731 5.721 5.801 160 9.549 9.542 9.62033 1.973 1.957 2.035 97 5.790 5.780 5.859 161 9.609 9.601 9.67934 2.032 2.016 2.096 98 5.850 5.840 5.920 162 9.669 9.661 9.74035 2.092 2.077 2.155 99 5.910 5.900 5.979 163 9.728 9.721 9.799

36 2.151 2.136 2.216 100 5.969 5.959 6.039 164 9.788 9.780 9.85937 2.211 2.196 2.274 101 6.029 6.019 6.098 165 9.848 9.840 9.91838 2.271 2.256 2.336 102 6.089 6.079 6.159 166 9.908 9.900 9.97939 2.330 2.315 2.394 103 6.148 6.138 6.217 167 9.967 9.960 10.03740 2.390 2.376 2.456 104 6.207 6.197 6.277 168 10.027 10.020 10.098

41 2.449 2.435 2.513 105 6.268 6.258 6.337 169 10.087 10.079 10.15742 2.509 2.495 2.575 106 6.328 6.318 6.398 170 10.146 10.139 10.21743 2.569 2.555 2.633 107 6.388 6.378 6.457 171 10.206 10.199 10.27644 2.628 2.614 2.695 108 6.447 6.437 6.518 172 10.266 10.258 10.33745 2.688 2.674 2.753 109 6.508 6.498 6.576 173 10.325 10.318 10.395

46 2.748 2.735 2.815 110 6.566 6.556 6.637 174 10.385 10.378 10.45647 2.807 2.794 2.872 111 6.625 6.615 6.695 175 10.445 10.437 10.51648 2.867 2.854 2.934 112 6.685 6.675 6.755 176 10.504 10.497 10.57549 2.926 2.913 2.992 113 6.745 6.735 6.815 177 10.564 10.557 10.63550 2.986 2.973 3.053 114 6.805 6.795 6.876 178 10.624 10.616 10.695

51 3.046 3.033 3.111 115 6.866 6.856 6.935 179 10.683 10.676 10.75552 3.105 3.092 3.173 116 6.924 6.914 6.995 180 10.743 10.736 10.81453 3.165 3.152 3.231 117 6.984 6.974 7.054 181 10.803 10.795 10.87454 3.225 3.213 3.293 118 7.044 7.034 7.114 182 10.862 10.855 10.93355 3.284 3.272 3.351 119 7.103 7.094 7.174 183 10.922 10.915 10.993

56 3.344 3.332 3.412 120 7.162 7.153 7.233 184 10.982 10.974 11.05357 3.404 3.392 3.471 121 7.222 7.214 7.292 185 11.041 11.034 11.11358 3.463 3.451 3.531 122 7.282 7.273 7.353 186 11.101 11.094 11.17259 3.523 3.511 3.590 123 7.341 7.334 7.411 187 11.161 11.154 11.23260 3.583 3.571 3.651 124 7.401 7.393 7.472 188 11.221 11.213 11.292

61 3.642 3.630 3.709 125 7.461 7.453 7.531 189 11.280 11.273 11.35162 3.702 3.690 3.771 126 7.520 7.512 7.591 190 11.340 11.332 11.41163 3.762 3.750 3.830 127 7.580 7.572 7.650 191 11.400 11.392 11.47164 3.821 3.809 3.890 128 7.640 7.632 7.711 192 11.459 11.452 11.53065 3.881 3.869 3.949 129 7.699 7.692 7.769 193 11.519 11.512 11.590

66 3.941 3.930 4.010 130 7.759 7.751 7.830 194 11.578 11.571 11.64967 4.000 3.989 4.068 131 7.819 7.811 7.889 195 11.638 11.631 11.71068 4.060 4.049 4.129 132 7.878 7.870 7.949 196 11.698 11.691 11.76969 4.120 4.109 4.188 133 7.938 7.930 8.008 197 11.758 11.751 11.82970 4.179 4.168 4.248 134 7.998 7.990 8.069 198 11.817 11.810 11.888

71 4.239 4.228 4.307 135 8.057 8.050 8.127 199 11.877 11.870 11.94872 4.299 4.288 4.368 136 8.117 8.109 8.187 200 11.937 11.929 12.00073 4.358 4.347 4.426 137 8.177 8.169 8.24674 4.418 4.407 4.487 138 8.237 8.229 8.308

DIAMETER OF SHAFT

KEYWAY WIDTH AND DEPTH

1/2 - 9/161/8 x 1/16

5/8 - 7/83/16 x 3/32

15/16 - 1 1/41/4 x 1/8

TOLERANCES FOR OVER PIN DIAMETERALL TOLERANCES ARE NEGATIVE

NUMBER OF TEETH TOLERANCEUp to 63 .004˝

64 and over .005˝

Over pin diameter tolerances Standard Keyways

*Outside Diameters are for Rounded Top Teeth Blank Diameters = Outside Diameters + 0.15" Blank Diameter Tolerance + .000 - .005 †Gauge Pin Diameter .125"

Maximum hub and dimensions shown on page H-30.

H-32

MORSE®

SILENT CHAIN SPROCKETS 1/2" PITCH

1" FACE WIDTH FOR 3/4˝ AND 1˝ WIDE CHAINS

No. OF

TEETH

CATALOG No.

PITCH DIA (In.)

TYPEMIN.

PLAIN BORE

MAX. BORE

STANDARD BORE DIAMETERS WITH STD. KS AND SS HD LTB APPROX.

WT.

17 404-17 2.721 B 5/8 1 3/83/4-1-1 1/8-1 1/4 2 2 1/8 2

19 404-19 3.038 B 5/8 1 5/83/4-1-1 1/8-1 1/4-1 5/8• 2 5/16 2 1/8 2.5

21 404-21 3.355 B 5/8 1 7/83/4-1-1 1/8-1 1/4-1 5/8 2 5/8 2 1/8 3.5

23 404-23 3.672 B 5/8 2 1/83/4-1-1 1/8-1 1/4-1 5/8 2 15/16 2 1/8 4.5

25 404-25 3.989 B 5/8 2 3/83/4-1-1 1/8-1 1/4-1 5/8 3 1/4 2 1/8 5.5

No. OF

TEETH

CATALOG NO.

PITCH DIA (IN.)

TYPEBORE RANGE IN

1/16˝ INCREMENTS TAPERED BORE BUSHING No. HD LTB APPROX.

WT.**MIN. MAX.

38 404-38 6.055 C 1/2 1 5/8 1615 3 1/8 1 1/2 457 404-57 9.076 C 1/2 1 5/8 1615 3 3/8 1 1/2 676 404-76 12.099 C 1/2 1 5/8 1615 3 3/8 1 1/2 995 404-95 15.122 C 1/2 2 1/2 2517 5 1 3/4 14.5114 404-114 18.148 C 1/2 2 1/2 2517 5 1 3/4 21

2" FACE WIDTH FOR 1 1/4˝, 1 1/2˝ AND 2˝ WIDE CHAIN

NO. OF

TEETH

CATALOG NO.

PITCH DIA (In.)

TYPEMIN.

PLAIN BORE

MAX. BORE

STANDARD BORE DIAMETERS WITH STD. KS AND SS HD LTB APPROX.

WT.

17 408-17 2.721 B 7/8 1 3/8 1 1/8-1 1/4 2 3 1/8 319 408-19 3.038 B 7/8 1 5/8 1 1/8-1 1/4-1 5/8• 2 5/16 3 1/8 421 408-21 3.355 B 7/8 1 7/8 1 1/4-1 5/8-1 7/8• 2 5/8 3 1/8 4.523 408-23 3.672 B 7/8 2 1/8 1 1/4-1 5/8-1 7/8• 2 15/16 3 1/8 625 408-25 3.989 B 7/8 2 3/8 1 1/4-1 5/8-1 7/8 3 1/4 3 1/8 7.5

No. OF

TEETH

CATALOG No.

PITCH DIA (In.)

TYPEBORE RANGE IN

1/16˝ INCREMENTS TAPERED BORE BUSHING No. HD LTB APPROX.

WT.**MIN. MAX.

38 408-38 6.055 C 1/2 1 5/8 1615 3 1/8 1 1/2 657 408-57 9.076 C 1/2 2 1/2 2517 5 1 3/4 1376 408-76 12.099 C 1/2 2 1/2 2517 5 1 3/4 2095 408-95 15.122 C 3/4 2 1/2 2525 4 1/2 2 1/2 21114 408-114 18.146 C 3/4 2 1/2 2525 4 1/2 2 1/2 26.5

**Weights shown do not include bushings •Setscrew at 90° from keyseat.

1/2" pitch sprockets

Standard bore tolerances

FINISHED BORE AND STOCK REBORE MINIMUM PLAIN BORE

LENGTH OFBORE, INCHESTO AND INCL.

DIAMETER OF BORE, INCHES

UP THRU 1

OVER 1 THRU 2

OVER 2 THRU 3

OVER 3 THRU 5 OVER 5 TYPE

SPROCKET ALL BORE SIZES1 .002 .002 .003 .004 .005 B +.002 - .0002 .002 .002 .003 .004 .005 C +.002 - .0003 .002 .0025 .003 .004 .0054 .002 .003 .003 .004 .0055 .002 .003 .003 .0045 .0056 .003 .0035 .0045 .0058 .003 .0035 .0045 .005

over 8 .004 .005 .005

Tolerance will be on the plus side of nominal bore diameters. Bore diameter tolerances less than these standards can be held at moderate extra cost.

TYPE BTeeth Hardened HubProjection One Side

TYPE CGray Iron

Hub Central

* Sprockets are made to order.

H-33

MORSE®

SILENT CHAIN SPROCKETS 1/2" PITCH

1/2˝ pitch sprockets

3˝ FACE WIDTH FOR 2 1/2˝ AND 3˝ WIDE CHAINS

No.OF

TEETH

CATALOGNo.

PITCHDIA.(IN.)

TYPEMIN.

PLAINBORE

MAX.BORE

STANDARD BORE DIAMETERSWITH STD. KS AND SS HD LTB APPROX.

WT.

19 412-19 3.038 B 1 1 5/8 1 5/8• 2 5/16 4 1/8 4.5

21 412-21 3.355 B 1 1 7/8 1 5/8-1 7/8• 2 5/8 4 1/8 6

23 412-23 3.672 B 1 2 1/8 1 5/8-1 7/8- 2 1/8• 2 15/16 4 1/8 8

25 412-25 3.989 B 1 2 3/8 1 5/8-1 7/8- 2 1/8• 3 1/4 4 1/8 10

No.OF

TEETH

CATALOGNo.

PITCHDIA.(IN.)

TYPE

BORE RANGE IN1/16˝ INCREMENTS TAPERED BORE

BUSHING NO. HD LTB APPROX.WT.**

MIN. MAX.

38 412-38 6.055 C 1/2 2 1/2 2517 4 1 3/4• 9

57 412-57 9.076 C 3/4 2 1/2 2525 4 1/2 2 1/2 14.5

76 412-76 12.099 C 3/4 2 1/2 2525 4 1/2 2 1/2 23

95 412-95 15.122 C 3/4 2 1/2 2525 4 1/2 2 1/2 27.5

114 412-114 18.146 C 15/16 3 3030 6 3 41

3 1/2˝ FACE WIDTH FOR 3 1/2˝ WIDE CHAINS

No.OF

TEETH

CATALOGNo.

PITCHDIA. (IN.)

TYPEMIN.

PLAIN BORE

MAX.BORE

STANDARD BORE DIAMETERSWITH STD. KS AND SS HD LTB APPROX.

WT.

21 414-21 3.355 B 1 1/8 1 7/8 1 7/8 2 5/8 4 5/8 5

23 414-23 3.672 B 1 1/8 2 1/8 1 7/8-2 1/8 2 15/16 4 5/8 7

25 414-25 3.989 B 1 1/8 2 3/8 1 7/8-2 1/8• 3 1/4 4 5/8 9.5

No.OF

TEETH

CATALOGNo.

PITCHDIA. (IN.)

TYPEBORE RANGE IN

1/16˝ INCREMENTS TAPERED BOREBUSHING NO. HD LTB APPROX.

WT.**MIN. MAX.

38 414-38 6.055 C 1/2 2 1/2 2517 4 1 3/4 9.5

57 414-57 9.076 C 3/4 2 1/2 2525 4 1/2 2 1/2 16

76 414-76 12.099 C 3/4 2 1/2 2525 4 1/2 2 1/2 21.5

95 414-95 15.122 C 15/16 3 3030 6 3 36

114 414-114 18.146 C 15/16 3 3030 6 3 45.5

KEYSEATS

DIAM OF SHAFT

KEYWAY *WIDTH &

DEPTH1/2 - 9/16

1/8 x 1/165/8 - 7/8

3/16 x 3/3215/16 - 1 1/4

1/4 x 1/8

1 15/16 - 1 3/85/16 x 5/32

1 7/16 - 1 3/43/8 x 3/16

1 13/16 - 2 1/41/2 x 1/4

2 5/16 - 2 3/45/8 x 5/16

2 13/16 - 3 1/43/4 x 3/8

3 5/16 - 3 3/47/8 x 7/16

3 13/16 - 4 1/2 1 x 1/2

*Width tolerances for straight and tapered keyways are plus .002 minus .000; keyway depth for straight keyways is nominal plus .005 with plus .010 tolerance. Keyway depth for tapered keyways is nominal minus .025 with plus .010 tolerance.

TYPE BTeeth Hardened HubProjection One Side

TYPE CGray Iron

Hub Central

** Weights shown do not include bushings• Setscrew at 90° from keyseat

* Sprockets are made to order.

H-34

3/4˝ pitch sprockets

3" FACE DUAL-DUTY WIDTH FOR 2" AND 3" WIDE CHAINSNo. OF

TEETH

CATALOGNo.

PITCH DIA.(In.) TYPE MIN. PLAIN

BOREMAX.BORE

STANDARD BORE DIAMETERSWITH STD. KS AND SS HD LTB APPROX.

WT.

17 612-17 4.082 B 1 2 1 5/8-1 7/8 3 1/6 4 1/8 8.519 612-19 4.557 B 1 2 3/8 1 7/8-2 1/8-2 3/8 3 1/2 4 1/8 1121 612-21 5.032 B 1 2 3/4 1 7/8-2 1/8-2 3/8 4 4 1/8 14.523 612-23 5.508 B 1 3 1/4 1 7/8-2 1/8-2 3/8 4 7/16 4 1/8 18.525 612-25 5.984 B 1 3 5/8 1 7/8-2 1/8-2 3/8 4 15/16 4 1/8 23

No. OF

TEETH

CATALOGNo.

PITCH DIA.(In.) TYPE

BORE RANGE IN1/16" INCREMENTS TAPERED BORE

BUSHING No. HD LTB APPROX.WT.**

MIN. MAX.38 612-38 9.082 C 3/4 2 1/2 2525 4 1/2 2 1/2 19.557 612-57 13.615 C 15/16 3 3030 6 3 3776 612-76 18.149 C 15/16 3 3030 6 3 46.595 612-95 22.683 C 1 3/16 3 1/2 3535 7 3/4 3 1/2 83114 612-114 27.219 C 1 3/16 3 1/2 3535 7 3/4 3 1/2 131.5

5" FACE DUAL-DUTY WIDTH FOR 4˝ AND 5˝ WIDE CHAINS

No. OF

TEETH

CATALOGNo.

PITCH DIA.(In.) TYPE MIN. PLAIN

BOREMAX.BORE

STANDARD BORE DIAMETERSWITH STD. KS AND SS HD LTB APPROX.

WT.

17 620-17 4.082 B 1 1/2 2 1 7/8• 3 1/16 6 1/8 1219 620-19 4.557 B 1 1/2 2 3/8 2 1/8-2 3/8• 3 1/2 6 1/8 1521 620-21 5.032 B 1 1/2 2 3/4 2 1/8-2 3/8 4 6 1/8 2123 620-23 5.508 B 1 1/2 3 1/4 2 1/8-2 3/8 4 7/16 6 1/8 26.525 620-25 5.984 B 1 1/2 3 5/8 2 3/8 4 15/16 6 1/8 33.5

No. OF

TEETH

CATALOGNo.

PITCH DIA.(In.) TYPE

BORE RANGE IN1/16" INCREMENTS TAPERED BORE

BUSHING No. HD LTB APPROX.WT.**

MIN. MAX.38 620-38 9.082 C 15/16 3 3030 5 3/8 3 32.557 620-57 13.615 C 15/16 3 3030 6 3 4976 620-76 18.149 C 1 3/16 3 1/2 3535 7 3/4 3 1/2 7295 620-95 22.683 C 1 7/16 4 4040 8 1/4 4 109.5114 620-114 27.219 C 1 7/16 4 4040 9 1/4 4 149

** Weights shown do not include bushings.• Setscrews at 90° from keyseat.

BUSHING No. BORE KEYWAY WT. LGTH. SCREW

SIZE

1615

1/2 – 9/161/8 x 1/16 1.2

1 1/23/8 x 5/8

5/8 – 7/83/16 x 3/32 1.1

15/16 – 1 1/41/4 x 1/8 1.0

1 5/16 – 1 3/85/16 x 5/32 .8

1 7/16 – 1 3/43/8 x 3/16 .7

1 9/16 – 1 5/83/8 x 1/8 .6

2517

1/2 – 9/161/8 x 1/16 3.5

1 3/41/2 x 1

5/8 – 7/83/16 x 3/32 3.4

15/16 – 1 1/41/4 x 1/8 3.3

1 5/16 – 1 3/85/16 x 5/32 3.2

1 7/16 – 1 3/43/8 x 3/16 3.0

1 13/16 – 2 1/41/2 x 1/4 2.4

2 5/16 – 2 1/2 § 5/8 x 3/16 1.9

2525

3/4 – 7/83/16 x 3/32 4.9

2 1/21/2 x 1

15/16 – 1 1/41/4 x 1/8 4.7

1 5/16 – 1 3/85/16 x 5/32 4.5

1 7/16 – 1 3/43/8 x 3/16 4.2

1 13/16 – 2 1/41/2 x 1/4 3.3

2 5/16 – 2 1/25/8 x 3/16 2.5

§ Special flat keys are furnished

Bore diameters available on 1/16˝ increments between minimum and maximum as shown below.TAPERED BORE-BUSHINGS

BUSHING No. BORE KEYWAY WT. LGTH. SCREW

SIZE

3030

15/16 - 1 1/41/4 x 1/8 9.2

3 5/8 x 1 1/4

1 5/16 - 1 3/85/16 x 5/32 8.9

1 7/16 - 1 3/43/8 x 3/16 8.6

1 13/16 - 2 1/41/2 x 1/4 7.6

2 5/16 - 2 3/45/8 x 5/16 6.2

2 13/16 - 3 § 3/4 x 1/4 5.0

1 3/16 - 1 1/41/4 x 1/8 14

3 1/2 1/2 x 1 1/2

1 5/16 - 1 3/85/16 x 5/32 14

1 7/16 - 1 3/43/8 x 3/16 13

3535 1 13/16 - 2 1/41/2 x 1/4 12

2 5/16 - 2 3/45/8 x 5/16 11

2 13/16 - 3 1/43/4 x 3/8 9

3 5/16 - 3 1/2 § 7/8 x 1/4 8

4040

1 7/16 - 1 3/43/8 x 3/16 22

4 5/8 x 1 3/4

1 13/16 - 2 1/41/2 x 1/4 21

2 5/16 - 2 3/45/8 x 5/16 19

2 13/16 - 3 1/43/4 x 3/8 17

3 5/16 - 3 5/87/8 x 7/16 15

3 11/16 - 3 3/4 § 7/8 x 1/4 14

3 13/16 - 4 § 1 x 1/4 13

TYPE BTeeth Hardened HubProjection One Side

TYPE CGray Iron

Hub Central

MORSE® SILENT CHAIN SPROCKETS3/4" PITCH/TAPERED BORE BUSHINGS

* SPROCKETS ARE MADE TO ORDER.