custom workholding

®

2

Table of Contents

Design and Manufacturing ........2

Sample Specials .......................3

What is a Special Collet ............4

Styles of Special Collets ............5

Application Specific ...................6

Fixturing for Mills .......................6

Special Materials .......................7

Saving You Money ....................8

Requesting a Quote ........... 9 - 11

Design and Manufacturing

It’s a competitive world out there. To profit in thematerial-cutting business you have to explore all thepossibilities. You have to process the part with lesssetup time, at a lower cost and a better quality thanyour competitor.

Let Hardinge help you maximize your workholdingproductivity—show you the options. You can’talways get by with an off-the-shelf collet orworkholding device. As a matter of fact, sometimescustom-made could save you money as well assetup and cycle times.

Collets, Expanding Collets, Feed Fingers, StepChucks, Special Accuracies, Special Shapes andFixturing are some of the common specials madedaily at Hardinge. We specialize in solutions forextruded stock, non-round parts, eccentric, off-center and stepped parts.

Hardinge will work closely with you to solve yourindividual needs while working within your param-eters. Our Design and Applications Engineers haveover a century of combined experience. Top-of-the-line machine tools and dedicated, highly-skilledmachinists can help expand your capabilities. Wireand Ram (EDM) electrical discharge machines allowcustom collet shapes and stepped-holes. Precisiongrinding machines, milling machines and CNClathes are maintained in top form for fast, depend-able throughput.

Specials are manufactured to rigid specifications,including material, proper heat treat and machinedaccuracy. For generations, Hardinge specials havebeen the choice of experienced machinists, manu-facturing engineers and productivity-orientedmanufacturers.

Hardinge will work with you for the fastest possibledelivery time to meet your deadline. Quite often astock item can be altered to meet your require-ments.

ID Pickoff Collet Assembly designedfor Euroturn 6/32–fits in standard OD

Pickoff Attachment

Over 50% of Special inquiries can be quoted instantlyover the phone without being passed on to anEngineer – many times your Special Requirement ora similar request has been previously manufactured hereat Hardinge!

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Sample Manufactured Specials

Collets,

Expanding

Collets,

Step Chucks,

Fixturing Devices

and more…

custom

manufactured

for your

special

application.

Optical Lens ColletExpanding Collet

Glass Rod ColletHydraulic Fixture

Gear Hobbing Collet High Production RotaryTransfer Collet

AG20 Pickoff Collet Swiss Pickoff

Double Head Collet

16C Hydraulic Fixturing with ID Grip

Capsule Collet

Sure-Grip®

Expanding Collet

Expanding Collet

Extended Dead-Length® Collet

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SERRATIONS

A standard collet is one whose order hole (round, round serrated,hex or square) is on the center line of the collet with a TIR within themanufacturer’s specifications for that collet style.

A Special Collet deviates from a standard collet. It’s TIR may beextremely close at .0002". The order hole may have one step to act asa stop, or multi-stepped allowing the part to be end-for-ended aftercompleting the first operation. The order hole may be eccentric (not onthe centerline of the collet) or it may be a special shape. Below aremany common special collets that Hardinge manufactures.

Angular Slotted and Zig-Zag• Holds hex, square or triangular parts on their

corners rather than on the flats. Corners willfall into the slots of a standard collet. Zig-zagare used for stock under 1/4".

Bearing Relief• A relief groove is placed in the center of the

bearing length to increase the gripping forcein that area.

Customized for the Application• Collets or workholding devices can be

completely designed from scratch to accom-modate assembly work, high-speed produc-tion machines and specialty machines.

Dead-Length Pinned Step Chucks and Closers• Holes are drilled in the step chuck, aligned

with the gage point of the workpiece. Pins arelocated in the closer to go through the holesin the step chuck. The pins are lightly facedto make them perpendicular to the center lineof the spindle. In operation the part is locatedagainst the pins and the step chuck is closed.The part will not move even when there is avariation in the chucking diameter.

Double-Head• Provides extra gripping on the bar stock. May

be reversed when one side wears out.

Expanding Collets – Internal Gripping• Many similar specials are available for

expanding collets such as serrated, eccentric,stepped, and spring ejectors.

Extended Nose – Straight or Tapered• Extended nose collets are sometimes

required when there is a tool or slide interfer-ence situation on the machine tool.

Extended Nose Collets – Pinned• This extended nose collet has a pin in each

slot to restrict the collapse of the collet underthe head angle eliminating collet breakage.Because the collet no longer collapses, thereis more substantial grip on the part.

Extra, Extra, Extra Extended Step Chucksand Closers

• Parts that have shanks bigger than the thrucapacity can be held in these special stepchucks and closer assemblies. The Z-Axiswork stroke of the machine tool is reduced.

Extruded• Variations include thru-collet, step collet, and

off-center.

What is a Special Collet?

ORDER HOLES

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Flat Face• The flat face is a locating surface for the

workpiece. The flat face should never bebehind the face of the spindle when the colletis closed on the part or a step will be worn inthe spindle angle of the machine tool.

Off-Center, Eccentric• Off-Center, Eccentric collets can be round,

hex, square, rectangular, or extruded.

Oversize Step Chucks and Closers• An oversize step chuck can be used when

the standard step chuck is too small to holdyour workpiece. Tooling interferences shouldbe thoroughly checked before ordering.

Over-The-Shoulder• When you have to clear a shoulder and grip

on a smaller diameter, an over-the-shouldercollet may be used. These collets are usuallystandard as pick-off collets on automaticscrew machines. This style collet can also beused on CNC lathes that have a long drawbar stroke.

• These collets are multi-slotted and doubleangled. The closing angle is very short andthe opening angle is very steep. The colletrequires an extremely large spread and isonly practical for light machining operationssuch as face, chamfer, etc.

Round Off-The-Spindle Fixturing• Several fixtures are made with round chuck-

ing surfaces. The chucking diameter of thefixtures are held within .0002" of each other.The bore of the step chuck is made to thesame diameter as the chucking diameter ofthe round fixtures.

• While one part is running in the machine,another fixture can be loaded to reducesetup time.

• The critical lengths are controlled becausethe chucking diameters of the round fixturesare held to within a couple ten thousandths.Holding lengths to .001" are the acceptednorm. If closer length tolerances are required,pins can be used in the step chuck and closerassembly.

Styles of Special Collets

Custom Serrations• Serrations add 10% additional gripping power

using the same draw bar pressure – popularround serrated collet sizes are standard.

• They can help prevent push-back and radialslipping during heavy forming or drilling.

• Serrations can be made in circular, buttress,diamond, tap and tapered flat (for draft angles).

Special Shape• Special shape collets are used for precision

cast parts and molded products.

• Many of these collets are made using theEDM process.

• Contour milling may also be done using aCNC VMC mill or a precision jig boring /grinding machine. Part size is only limited tothe machine tool’s capabilities.

Stepped, Single & Multi-Stepped• This style collet locates the part a specific

distance from the face of the collet. It eliminatespush back of the stock but does not controllengths due to stock diameter variations.

• A single-stepped may have a thru-hole togrip on the shank of a part during the firstoperation or it may be a clearance hole fora drill or boring tool.

• Multi-stepped are used when end-for-endingthe workpiece.

Synchronized Collets• A synchronized collet is used when a point on

the part has to align with the center of thekeyway of the collet. Hex and square colletsare synchronized to the center of the flat orthe corner. Some standard collets for specificmachines are already synchronized.

Tapered• Taper styles include regular Morse, Jacobs

and custom tapers, as well as reverse taper.

Threaded• Threaded collets can be ordered in solid,

3-split and 4-split.

STYLES

See pages 9 - 11 to assist you in obtaining a quote for your required workholding device.

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LOAD & RUN IT

Application Specific

No job is too complex or unusual! Our team of experts canprovide an accurate and reliable solution while minimizingyour setup and handling without compromising the integrityof your machine. You’ll experience less breakage and wearwith Hardinge workholding products…and that meansmore uptime on your machine!

Specialty & High Production Machines• Hold pins and electronic components

inserted on boards

• Hold pill capsules for assembly

• Hold pipes for bending into tail pipes and bumpers

• Fasten tops on perfume bottles

• Crimping with expanding collets

• Hold engine valves for grinding

• Expand plastic tubing

• Hold long delicate glass tubes

Second OperationsA multi-spindle automatic can be set up forsecondary operations using special Dead-Length® collets, or expanding collets. A standardCNC 3-Jaw chuck-style lathe can be equippedwith a spindle adapter for draw collets orstationary collets.

Increase your milling productivity with fixturingfor single or multiple part setups. Hardinge canprovide OD and ID gripping solutions in hydraulicor pneumatic fixturing. Custom-designed tool-holders can pick and place parts for automatedmachining.

Spindle draw bar linkupsHardinge manufactures draw bar linkups formounting chucks, expanding collets and colletchucks. Request form B-91 to provide thenecessary measurements.

A Hardinge-designed toolholder picks thepart and moves it to and from the specialfixture on this vertical machining centerfor automated machining.

Capsule Collet (top)

Ballpoint Pen TipCollet (center)

Packer-MaticPolishing Collet (bottom)

“Hardinge makes special Hydromat Collets for us that are unique to the industry. I’m simplyamazed with the quick turnaround and delivery they’re able to provide into Canada.” Charlie Ruecker—Advance Precision

Rely on Hardinge for a durable workholding solution foryour specialty or high production machine.

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Different collet materials to accommodate non-typical workpiece materials• Carburized and hardened steel results in the hardest (62-64 RC), longest wearing collet.

Most Hardinge collets are made of this material. Hardinge has been perfecting this processfor over a hundred years. Other manufacturers use thru-hardened tool steel, resulting in asofter collet with high wear potential.

• Thru-hardened tool steel is usually hardened to 55 RC. These collets are typically usedwhere wear is not critical, such as expanding collets.

• Bronze and brass collets are made tohold polished rod and parts wherescratches cannot be tolerated. Bronzeand brass inserts or pads can be used inhardened and ground collets when colletspring and spread is critical.

• Carbide provides the highest wearresistance. Collets can be impregnatedwith carbide or a carbide insert can bebrazed into the collet and then groundto size.

• Iron is used for some feed finger padsto reduce marking.

• Delrin and Nylon are used to holddelicate parts. Inserts or pads of either ofthese materials can be used in hardenedand ground collets when collet spring andspread is critical.

• Rubber inserts provide cushion forglass rods.

Special Materials

Quite often it is necessary to hold asoft or brittle workpiece, a part thatcannot be marked or scratched, or athin-walled part. Hardinge can providea gripping solution for all types ofworkpiece materials.

Special Collets are available to holdglass rods, optical lenses, pill capsules,plastics and wood. Hardinge hasexperience with all types of materialsincluding brass and aluminum extru-sions, castings and die castings.

ExpandingCollet with impregnatedCarbide surfaces forincreased gripping power.

Master pads madefrom Nylatron toeliminate marking theworkpiece.

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Economical pick-off Collet Assembly designed forlow-cost alternative for Euroturn 6/32

Manth-BrownellSaves $40,655 – IncreasesProductivity and ImprovesAccuracy…Hardinge designed an IDPickoff Collet Assembly asan alternative to purchasingthe machine tool builder’s IDPickoff Attachment and Kit.This allows the customer tochange just the collet ratherthan the entire attachment,saving hours of setup time.The ID Pick-off ColletAssembly with built-in partejector is available forEuroturn, Gildemeister andTornos Deco’s standard ODpick-off attachmentsand is application specific.

Hardinge Machine COMPARE: Collet ID Attachment

Assembly & Kit

Cost $2,995 $43,650 Setup 15 minutes 8 hours Length Control* .0002-.0003 .004-.006 *finished part length

Saving You Money

Standard Pickoff Attachment shown left with Hardinge ID Pick-offCollet Assembly (right).

ConcentricityWhen you purchase a Hardinge Special Collet with a definedconcentricity, you can be assured of a qualified inspection.Each collet is inspected in a fixture that rotates in a set ofprecision bearings. The fixture itself is a mirror image of yourspindle. This assures each collet will hold your parts consis-tently during your machining operations. Concentricity ismeasured in terms of Total Indicator Runout (TIR) a setdistance from the face of the collet.

In-House Heat Treat and Spring TemperOne of the keys to manufacturing collets, feed fingers andpads that are long lasting and provide the performance youexpect is the raw material used and the heat treat processcontrol system to guarantee proper hardness and tempering.Collets and feed fingers are prone to breakage where thehardened area meets the tempered area on the product.Hardinge heat treat processes are planned to eliminatebreakage on critical design areas to provide a long lastingproduct that is not subject to breakage and wear. Hardingecollets are 5 to 7 points of Rockwell “C” harder thancompetitive products.

Manufacturing Specifications

Hardinge provides the proper combi-nation of hardness and tempering forlonger wear. This exaggerated caseshows extreme flexibility withoutbreakage!

“Hardinge is oursole supplier forspecial accuracycollets. Theydeliver the preci-sion and qualitywe demand.”

Lori PollockTRW Fuji Valve Inc.

Wes Skinner, President (right) of Manth-Brownell(Kirkville, NY), Cal Macomber, Director Sales &Marketing, (left) Hardinge Workholding

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To place your order or Request a Quote simply fill out this form and send the requestedinformation below. All of this information is necessary for us to process your orderquickly. Checking the box in front of each item will help to ensure everything is completebefore sending the information to us. The following two pages will assist youin choosing your collet configuration.

— This page may be duplicated —

Custom Quote Request – 1 of 3

❑ Your Name______________________________________________

❑ Company _______________________________________________

❑ Address ________________________________________________

❑ City, State & Zip __________________________________________

❑ Phone ____________________ ❑ Fax ___________________

❑ Machine Make and Model Number on which workholding will be used:(Example: Hardinge Quest 8/51, 1-1/4" Acme) ____________________________

❑ Collet Required:(Example: 5C, 16C, 1-1/4" Acme, etc.) ________________________________

❑ Spindle Nose:(Example: A2-5, A2-8, etc.) ___________________________________________

❑ Sample Stock (6" long - extruded stock), casting, first operation part,finished part

❑ Legible Prints of the stock, finished part. These must be marked toshow the diameters or surfaces to be gripped. Mark the locating surfaceused for length control. Please mark the surfaces to be machined.

❑ AutoCad Files or dxf files of the above, if available.

❑ Written Explanation of any special requirements:For example special concentricity or perpendicularity requirements,concerns with chip flushing, requirements for thru-spindle coolant,customer concerns with part being deformed by gripping, large variationof gripping surface or locating dimensions, etc.

Explanation:

_______________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

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• Fill in the Type of Collet or Special (example 16C)• Find the illustration of the feature needed in one of the boxes• Put a Bold “X” in the box to indicate that feature• Write the required dimensions next to their numbers in the chart to the rightNote: Only fill in the dimensions for the numbers on one illustration

Custom Quote Request – 2 of 3

Today’s Date ________________________________Date Order Required __________________________Customer Number ____________________________Purchase Order Number _______________________Method of Shipping ___________________________

Bill To:Name______________________________________Title/Dept. __________________________________Company ___________________________________Address ____________________________________City, State, Zip _______________________________Phone _______________ Fax _________________

Ship To: (If different from Bill To)

Name______________________________________Title/Dept. __________________________________Company ___________________________________Address ____________________________________City, State, Zip _______________________________Phone _______________ Fax _________________

Type of Collet or Special:

(5C, 16C, 1-1/4" Acme, etc.)

Numbers below correspond to dimensions in boxes

1 Order Hole Size: __________________

2 Order Hole, 2nd: __________________

3 Number of Slots: __________________

4 Radius: _________________________

5 Bearing Length: __________________

6 Bearing Length Front: ______________

7 Back Drill Dia.: ___________________

8 Relief Dia.: ______________________

9 Relief Length: ____________________

10 Depth of Step, 1st: ________________

11 Depth of Step, 2nd.: _______________

12 Auxiliary Hole Size: _______________

13 Length of Extension: _______________

14 Dia. at Face: _____________________

15 Degrees Taper/Chamfer: ___________

16 Front Dimension of Taper: __________

17 Rear Dimension of Taper: __________

18 Taper-Industrial Std: _______________

19 Off Center Distance: _______________

20 Order Hole - Width: _______________

21 Order Hole - Length: _______________

22 Thread Length: ___________________

23 Threads Per Inch: _________________

24 Right/Left Hand Thrd.: _____________

25 Class Thread (1), (2), (3): __________

26 Chamfer Depth: __________________

27 Inscribed Circle: __________________

28 Circumscribed Circle: ______________

29 Clearance Bore: __________________

30 Actuator Stroke: __________________

Special Extruded Shape

Drawing & Sample Stock Required• An extrusion drawing must indicate the

centerline of the shape in relationship tothe centerline of the collet.

• Sample stock required.* If not available,manufacturing authorization is requiredprior to entry of order. If approved,item(s) will be manufactured withcustomer assuming full responsibility.

• The confirming order.

Send Drawings, Sample Partsand this form to:

Hardinge Inc.Collet Sales Dept.

One Hardinge DriveElmira, New York 14902-1507

Phone: 800-843-8801Fax: 607-734-3886

Email: info@hardinge.comCanada: 800-468-5946

Other countries: 607-378-4022International Fax: 607-734-1701

Return Material Authorization (RMA#) requiredfor Hardinge to receive your Sample Part

RoundEccentric

Hexagon Eccentric to Corner

Hexagon Eccentric to Flats

Square Eccentric to Flats

Square Eccentric to Corner

Triangular

RectangularEccentric - Short Side

RectangularEccentric - Long Side

Octagon Eccentric to Flat

Octagon Eccentric to Corner

*One 6" length of stock required when ordering 1 to 3 collets; two 6"lengths for 4 to 7 collets; three 6" lengths for 8 to 11 collets; four 6"lengths for 12 to 15 collets ordered.

— This page may be duplicated —

11

Custom Quote Request – 3 of 3

Threaded Order Hole

Extended Nose - TaperedExtended Nose - Straight Angular Slotted

Taper - ReverseTaper - Regular

— This page may be duplicated —

Bearing Relief

Single-Stepped Double-Stepped

Chamfer - Depth Chamfer - Diameter Radius

Special Bearing Length Eccentric Step - Aux. Off Center Eccentric Step - Aux. On Center

1. Check mark the box with the feature you require.2. Record the dimensions on the corresponding lines 1-30

on the previous page.

Zig-Zag Slots

Flat FaceOver-the Shoulder

Hardinge Product brochures®

7.5M

HI 0

803

Prin

ted

in U

SA

Spindle Tooling forManual & CNC

Lathes:Brochure #2348

Sure-Grip® ExpandingCollet Systems:Brochure #2270

HCAC™ ColletAdaptation Chucks:

Brochure #2352

Precision ToolHolding Systems

for Mills:Brochure #2350

Toolholder Collets,Toolholder Bushings &Round Shank Holders:

Brochure #2351

Sure-Grip® 3-JawPower Chucks:Brochure #2357

A2-5 16C PneumaticCollet Block:

Brochure #2365

HQC® Quick-ChangeCollet Systems:Brochure #2339

Swiss-Type Collets,Guide Bushings and Bar

Loader Collets:Brochure #2283

Sure-Grip® ChuckJaws for All

Brands of Chucks:Brochure #2358

Machine ToolProducts

Overview:Brochure #1325

Collets forAutomatics:

Brochure #2287

Brochure #2349Part No. HA -0009500-2349August 2003

Litho in USA© Hardinge Inc. 2003

All specifications subject to change without notice. All marks indicated by ® or ™ are trademarks ofHardinge Inc. All other marks are trademarks of their respective company.

To order in USA: 800-843-8801To order in Canada: 800-468-5946All other calls: 607-378-4022Fax: 607-734-3886Internet: www.hardingeworkholding.com

www.hardinge.com(order online) www.hardingetooling.com

Hardinge Inc.One Hardinge DriveP.O. Box 1507Elmira, New York 14902-1507 USA

Worldwide Manufacturer of Machine Toolsand Workholding/Industrial Products