WORKHOLDING SYSTEMS www.ptgworkholding.co.uk 2 INSTALLATION & PRE-LOADING INSTRUCTIONS INSTRUCTIONS INSTALLATION &PRE-LOADING Pre-load Flats M/C Spindle • • • • • • • Drawbar Machine contracts withthesleeve,ensuringpin check concentricity) does notexpandthesleeve. (using clockregister ordouble-angleformto assembly initsworkingposition. already fitted). body. Screw thepinclockwise retracted, andplaceexpanderpinin mandrel bodyandsleeve. Load componentontothemandrel Ensure pre-load adjustmentscrew is Place expandingsleeveonmandrel body. Ensure double-anglesare cleanonboththe Fit end-locatortomandrel body(ifnot Load mandrel bodytomachinespindle Ensure themachinedrawbarisfullyforward. into thedrawbaruntilheadofpin Screw Pre-load Adjustment Mandrel Body Component EndLocator Expander Pin Double Angles Sleeve Expanding • • • • • • The mandrel isnowready foroperation. pre-load adjustmentscrewTighten ensuring component issatisfactorilyheld.Ensure that clearance toensure easyloading. component. first availablepre-load flatisadjacentto pre- expander pinhasslightradialmovement,to and operatingthedrawbar, ensuringthe allow pintoslidefreely. slippage. Screw expanderpinclockwiseinto Finally, check byloadingthecomponent Remove componentandcheckloading Back-off expanderpinanti-clockwiseuntil the drawbarpressure issufficient toprevent the drawbaruntilsleevegrips load adjustmentscrew. Component Pre-load Flats CONTENTS

INSTALLATION & PRE-LOADING INSTRUCTIONS...... 2

CONTENTS...... 3

INTRODUCTION...... 4

MODULAR MANDREL SYSTEMS...... 5

POWER OPERATED

FACEPLATE DRAWBAR OPERATED MANDREL...... 6

SPIGOT DRAWBAR OPERATED MANDREL...... 7

HAND OPERATED MANDRELS

BETWEEN CENTRES MANDREL...... 8

FACEPLATE NUT OPERATED MANDREL...... 9

STANDARD SLEEVES...... 10

SPECIAL SLEEVES AND MANDRELS...... 11

SPECIAL APPLICATIONS...... 12

SPECIAL APPLICATION ENGINEERING...... 13

CHUCKING APPLICATIONS...... 14

FREQUENTLY ASKED QUESTIONS...... 15 CONTENTS

The continuing advances in production methods in the industry has created a need for precision workholding devices capable of automatic clamping in component “bores. In addition, the equipment must transmit the high accuracy of the latest machine tools and develop sufficient holding power to resist the cutting forces imposed on the work-piece.” 3 4 INTRODUCTION INTRODUCTION • • • • • • Aerospace Automotive manufacturingadvances, As modern organisations withinthefollowingsectors: , specialcolletchucks are nowavailable. demanding engineeringtasks. your particularrequirements inpreparing aproposal. experience canyield.We mayhavealready solvedtheveryproblem you Our experiencedCADteamwilltakeaccountofall able tooffer unmatchedengineeringknowledgethatonlyyearsof and inresponse tocustomer demand, sleeves, designandmanufacture ofallstyles supplier ofworkholdingtechnology. Sub-contract operations workholding equipment.Complementing we nowoffer afullandversatile rangeof Whilst mostholdingoperationscanbesuccessfullyobtained We havetheskillsandexpertise PTG Workholding Ltd.isa leading Electrical engineering PTG Workholding Ltd.worksinmanyexistingmarkets,including the core businessofexpanding mandrels and to meetthemostexactingand Medical Machine toolmanufacturing face forothermanufacturers. by usingthemodularsystemandgoodtooldesign,PTGare MODULAR MANDREL SYSTEM 5 No need to hold the work to close bore tolerance. No need to hold the work to close bore One mandrel can accommodate a wide range of can accommodate a wide range One mandrel sleeve sizes. along the length of the sleeve. Greater holding power by applying pressure evenly holding power by applying pressure Greater Availability of multiple sleeves for work with greater of multiple sleeves for work with greater Availability length-to-diameter ratios, eliminating wobble and length-to-diameter ratios, eliminating Order online at www.ptgworkholding.co.uk chatter. if desired. Guaranteed accuracy of 0.013mm (0.0005”) T.I.R., or closer or T.I.R., Guaranteed accuracy of 0.013mm (0.0005”) Pull-back of component onto end locator for positive Pull-back of component onto end locator location. A standard expansion range of 0.8mm (0.032”). A standard components. Our unique double-angle principle allows for fast loading and unloading of principle allows for fast loading Our unique double-angle PTG’s modular mandrel system provides the following benefits: the system provides modular mandrel PTG’s PTG Workholding are generally able to recondition arbors by re-grinding the angles to arbors by re-grinding generally able to recondition are PTG Workholding PTG produce and supply precision expanding mandrels capable of automatic expanding mandrels and supply precision PTG produce return mandrels to their original accuracy. return mandrels resist the cutting forces imposed on the work piece. imposed on the cutting forces resist clamping in component bores, achieving the highest accuracy and holding power to achieving the highest accuracy and bores, clamping in component MODULAR MANDREL SYSTEM MANDREL MODULAR 6 POWER OPERATED MANDRELS WEIGHT g Part Notes REMOVE ALLBURRS &SHARPEDGES MANDREL FACEPLATE DRAWBAR OPERATED 18C 8C 7C 6C 5C 4C 1C 2C 3A to bequalified G dimension *M thread 130.0 89.0 76.2 63.5 41.0 28.5 22.0 16.0 12.5 Min -0.26(.010") -0.40(.015") *8C hasfemalethread

A. G 178.0 130.0 Max 89.0 76.2 63.5 41.0 28.5 22.0 16.0 The faceplatedrawbaroperatedexpandingmandrel canbeusedonanymachinewith mandrel double-anglesat all times. For maximumefficiency, expansionsleevesshouldbepre-loaded tomaintaincontactwith stressing theexpandingsleeve. location face.There isanover-expansion stopbuiltintotheexpanderpintoavoidover- The naturalpull-backactionofthesleeveensures thecomponentishard againstthe of locatingfaces)can alsobemanufactured toyourrequirements. Workholding, orthecustomer. Componentend-locators,solidtypeorcompensating(forout Adaptor platesmadetosuitthemachinemountingcanbemanufactured byPTG andgrindingoperations. drawbar facilities,forgeneralturning 153 133 118 109 84 79 72 66 60 B F LAST SAVEDBY SCALE SHEET 06/10/2008 ken 30.0 30.0 25.0 25.0 20.0 20.0 20.0 20.0 20.0 C 1:1 79.5 63.5 57.0 51.0 43.0 38.0 32.0 27.0 22.0 D C X 24.6 25.2 24.7 25.3 14.8 15.3 15.5 15.0 14.6 K 0.4 E TOLERANCES 22 47 37 36 36 31 30 22 20 E F X.X 0.10 L 100 100 60 60 40 40 40 40 40 G B X.XX 180 180 120 120 0.05 75 75 75 75 75 H D 124.0 86.5 74.5 55.0 37.5 26.5 20.0 15.0 11.0 J (UNLESS OTHERWISESTATED) PLYMOUTH, DEVON X.XXX K LDESIGN 0.013 K 6 6 6 6 6 6 6 6 6 expansion stop 123.0 84.1 71.1 57.3 37.0 26.3 20.7 14.1 12.6 L J over ANGULAR M36 M24 M20 M20 M12 M10 0.5 M8 M8 M4 M 150 150 DP 94 94 58 58 58 58 58 N screw holes tosuit Mounting screw for component. position toprovideloadingclearance Sleeves aregroundintheexpanded Gripping diameterA. N M12 M12 M10 M10 M8 M8 M8 M8 M8 Ø HEAT TREATMENT: CUSTOMER: ISSUE None DATE DRAWN 150 150 DP 94 94 58 58 58 28 28 A R M10 M10 M8 M8 M6 M6 M6 M4 M4 Ø KJL F Max (daN) 5500 2700 3200 2800 2300 1800 1200 1000 700

R screws to suit fixing holes End locator 90.800.259.1 90.800.253.1 90.800.248.1 90.800.241.1 90.800.234.1 90.800.227.1 90.800.221.1 90.800.215.1 90.800.210.1

Tool # FINISH: MATERIAL: H +0.000(.0000") -0.015(.0006") 90.800.234.1

SHEET 1 OF 1 A3 A3 1 OF 1 SHEET 90.820.234.1

POWER OPERATED MANDRELS 7 MATERIAL: FINISH: Tool # Tool 90.810.210.1 90.810.215.1 90.820.221.1 90.820.227.1 90.820.234.1 F 700 Max 1000 1200 1800 2300 (daN) KJL A M M4 M8 M8 M10 M12 J Over expansion stop. L 9.5 14.1 20.7 26.3 37.0 K 14 18 17 18 21 DRAWN DATE None ISSUE CUSTOMER: HEAT TREATMENT: J 11.0 15.0 20.0 26.5 37.5 D H 26 26 40 40 50

G 0.5 20 20 30 30 30

B L E ANGULAR Order online at www.ptgworkholding.co.uk F 20 20 27 27 27 C Sleeves are ground in the expanded position to provide loading clearance for components Gripping diameter A. E 0.013 K L DESIGN 9.8 8.0 9.5 10.0 10.5 X.XXX PLYMOUTH, DEVON (UNLESS OTHERWISE STATED) F D 22.0 27.0 32.0 38.0 43.0 0.05 X.XX C 11.0 11.0 11.0 11.0 13.0 K B 66 70 85 92 99 0.10 X.X

with mandrel double-angles at all times. with mandrel drawbar facilities, for general turningdrawbar facilities, for operations. and grinding by PTG be manufactured to suit the machine mounting can Adaptor plates made solid type or compensating Component end-locators, or the customer. Workholding, to your requirements. can also be manufactured locating faces) (for out of square against the is hard the component action of the sleeve ensures The natural pull-back stop built into the expander pin to avoid is an over-expansion location face. There the expanding sleeve. over-stressing contact to maintain expansion sleeves should be pre-loaded For maximum efficiency, The spigot drawbar operated expanding mandrel can be used on any machine with can be used operated expanding mandrel The spigot drawbar G -0.013(.0005") -0.005(.0002") TOLERANCES 16.0 22.0 28.5 41.0 63.5 Max 0.4 X A. H Min 12.5 16.0 22.0 28.5 41.0 1:1 SPIGOT DRAWBAR OPERATED OPERATED DRAWBAR SPIGOT MANDREL ken 3A 06/10/2008 4C 2C 1C SHEET SCALE LAST SAVED BY 18C & SHARP EDGES REMOVE ALL BURRS Part Notes WEIGHT g WEIGHT g Part Notes REMOVE ALLBURRS &SHARP EDGES 8 HAND OPERATED MANDRELS BETWEEN CENTRESMANDREL H 18C 4C 1C 2C 8C 7C 6C 5C 3A K mandrel double-anglesatalltimes. For maximumefficiency, expansionsleevesshouldbepre-loaded tomaintaincontactwith purposes. are hand-operatedbyuse of conventionalspanners,andare oftenusedforinspection These mandrels are generallyusedforsmall-batchgrindingoperations.Thesemandrels manufactured bythecustomer. solid-type orcompensating(forout-of-square locatingfaces)canalsobesupplied,or manufactured byPTGWorkholding Ltd.,orthecustomer. Componentendlocators, by useofanadaptorplate. Adaptor platesmadetosuitthemachinemountingcanbe There isaground diameterGtoadaptthismandrel toface-platemounted,ifrequired, possible toattachasimplecomponentendlocator, ifrequired, atdiameterL. 60 degree centres, andcanbedrivenfrom thedriveflatwithacarrieror plate.Itis The nutoperatedbetween-centres expandingmandrel isgenerallymountedbetween LAST SAVED BY SCALE SHEET 06/10/2008 ken 130.0 89.0 76.2 63.5 41.0 28.5 22.0 16.0 12.5 Min 1:1 A. 178.0 130.0 Max 89.0 76.2 63.5 41.0 28.5 22.0 16.0 M A/F X 0.4 TOLERANCES 205 205 155 145 120 107 99 83 77 B X.X 0.10 13.0 11.0 11.0 11.0 11.0 C - - - - 79.5 63.5 57.0 51.0 43.0 38.0 32.0 27.0 22.0 X.XX D

0.05 -0.005(.0002") -0.013(.0005") G 55.5 44.0 26.3 26.0 23.0 21.2 21.5 20.0 21.0 E (UNLESS OTHERWISESTATED) PLYMOUTH, DEVON X.XXX K LDESIGN 0.013 50 50 35 35 27 27 27 20 20 F F 80 60 50 40 30 30 30 20 20 G ANGULAR C 0.5 123.0 84.1 71.1 57.3 50.0 40.0 40.0 26.0 26.0 E H

L J A/F 124 85 65 55 36 24 19 13 10 clearance forcomponent. position toprovideloading Sleeves aregroundintheexpanded Gripping diameterA. Ø Ø B HEAT TREATMENT: CUSTOMER: ISSUE None DATE DRAWN 73 55 45 35 27 27 27 18 18 K D 123.1 84.1 71.1 57.3 37.0 26.3 20.7 14.1 9.5 L 105 70 60 50 46 36 36 22 22 M KJL

90.861.159.1 90.851.153.1 90.841.148.1 90.831.141.1 90.821.134.1 90.821.127.1 90.821.121.1 90.811.115.1 90.811.110.1

Tool # A/F J FINISH: MATERIAL: A 90.821.134.1 SHEET 1 OF 1 A3 A3 1 OF 1 9

HAND OPERATED MANDRELS SHEET 90.800.134.1

-0.015(.0006")

+0.000(.0000") G Tool # Tool 90.800.115.1 90.800.121.1 90.800.127.1 90.800.134.1 90.800.141.1 90.800.148.1 90.800.153.1 90.800.159.1 90.800.110.1 MATERIAL: FINISH: End locator fixing holes to suit R screws Ø M4 M6 M6 M6 M8 M8 M4 M10 M10 R 28 58 58 58 94 94 28 DP 150 150 KJL Ø M8 M8 M8 M8 M8 M10 M10 M12 M12 N A 58 58 58 58 94 94 58 DP 150 150 DRAWN L DATE None ISSUE 14.1 20.7 26.3 37.0 57.3 71.1 84.1 12.6 CUSTOMER: HEAT TREATMENT: 123.1 Gripping diameter A. Sleeves are ground in the expanded position to provide loading clearance for component. Mounting screw holes to suit N screw 6 6 6 6 6 6 6 6 6 K Ø Ø J J 13 19 24 36 55 65 10 A/F A/F 85 124 0.5 G 75 75 75 75 75 120 120 180 180 ANGULAR Order online at www.ptgworkholding.co.uk F 40 40 40 40 60 60 40 100 100 E 0.013 K L DESIGN 25.0 15.0 15.0 15.5 15.2 15.0 25.0 25.0 25.0 X.XXX PLYMOUTH, DEVON (UNLESS OTHERWISE STATED) D D 79.5 22.0 27.0 32.0 38.0 43.0 51.0 57.0 63.5 B 0.05 X.XX C

30.0 20.0 20.0 20.0 20.0 20.0 25.0 25.0 30.0 L 0.10 X.X E B 73 79 86 94 185 105 134 144 166 TOLERANCES For maximum efficiency, expansion sleeves should be pre-loaded to maintain contact to maintain expansion sleeves should be pre-loaded For maximum efficiency, double-angles at all times. with mandrel no drawbar facility, for general turning and grinding operations. These are a popular a for general turning are and grinding operations. These no drawbar facility, locators. choice for fixture by be manufactured to suit the machine mounting can Adaptor plates made end locators, solid-type or Component customer. Ltd., or the PTG Workholding by the locating faces) can also be manufactured out-of-square compensating (for customer. against the the component is hard ensures The natural pullback action of the sleeve location face. The face-plate nut operated expanding mandrel can be used on any machine with can be used on operated expanding mandrel The face-plate nut 0.4 K X C 16.0 22.0 28.5 41.0 63.5 76.2 89.0 Max 130.0 178.0 A.

1:1

F dimension to be qualified F

Min

63.5 76.2 89.0 12.5 16.0 22.0 28.5 41.0

130.0 -0.40(.015")

-0.26(.010") ken 06/10/2008 SHEET SCALE FACEPLATE NUT OPERATED MANDREL MANDREL OPERATED NUT FACEPLATE LAST SAVED BY 3A 5C 6C 7C 8C 2C 1C 4C 18C & SHARP EDGES

Part Notes REMOVE ALL BURRS WEIGHT g 10 STANDARD SLEEVES STANDARD SLEEVES Standard Type Sleeve Model 18C1 4C1 1C1 2C1 8C1 7C1 6C1 5C1 3A1 Standard TypeSleeve 130.0 89.0 76.2 63.5 41.0 28.5 22.0 16.0 12.5 Min Diameter Gripping Flush TypeSleeve 178.0 130.0 Flush Type Sleeve Standard Type Sleeve form, helpingtoprolong the sleeve’s lifeandaccuracy. PTG Workholding cansupply bondedsleevestokeepswarfawayfrom thedouble-angle used ona3Athread-operated mandrel. will accepta3A1standard-type ora3A2flush-typesleeve,whichmayhavebeenoriginally within thediameterrangeofeachtype.Forexample,3Adrawbaroperatedmandrel Our standard lengthsleeves canbeusedwithalltypesofmandrel, andare interchangeable 89.0 76.2 63.5 41.0 28.5 22.0 16.0 A A Max Length 80.0 63.5 57.0 51.0 43.0 38.0 32.0 27.0 22.0 Expanded Position 0.39 0.39 0.26 0.26 0.26 0.13 0.13 0.13 0.13 92.400.20X.XXXX 92.350.20X.XXXX 92.300.200.XXXX 92.250.200.XXXX 92.200.200.XXXX 92.150.200.XXXX 92.100.200.XXXX 92.050.200.XXXX 92.000.200.XXXX Tool # If notordering viaourwebsite,wewould www.ptgworkholding.co.uk requirements, pleaseplaceyourorder onlineat To order easilythecorrect sleevetomeetyour Ordering Information 38.10mm diameterbore =92.150.2 e.g. gripped. number, thecomponentbore andtolerancetobe All sleeveorders mustspecifythetypeandmodel and modelnumberofthemandrel. recommend customers’orders specifythetype Flush Type Sleeve Model 18C2 8C2 7C2 6C2 5C2 4C2 1C2 2C2 3A2 1off type18C1bondedsleevetogrip 143.0 101.0 89.0 73.0 51.0 40.0 28.5 22.0 16.5 Min Diameter Gripping 178.0 143.0 102.0 89.0 73.0 51.0 40.0 28.5 22.0 Max Length 99.5 78.5 69.0 60.0 50.0 45.0 38.0 32.0 26.0 Expanded Position 0.39 0.39 0.26 0.26 0.26 0.13 0.13 0.13 0.13 . Bond 92.401.20X.XXXX 92.351.20X.XXXX 92.301.200.XXXX 92.251.200.XXXX 92.201.200.XXXX 92.151.200.XXXX 92.101.200.XXXX 92.051.200.XXXX 92.001.200.XXXX 1 0.3810 Tool # SPECIAL SLEEVES AND MANDRELS

We have available a comprehensive range of special sleeves, that have been developed to accommodate the varying conditions and the more difficult workholding problems, that modern industry is faced with today. PTG design engineer’s can use any combination of the following to provide the ideal clamping solution.

All of the expanding sleeves below can be supplied with their expansion slots bonded with silicone as specials. This is recommended to keep swarf away from the double angle form. This will prolong the life and accuracy of the expanding mandrel assembly.

Short Length Short length ( 1/2C1 ) 1/2C1 There are many situations where the customers component is too short for our standard sleeve. We therefore have a full range of short sleeves.

Standard length ( C1 ) SPECIAL APPLICATIONS The standard sleeve has it’s double angles spaced at their optimum position to provide positive clamping and accuracy.

Extended length ( C11 ) There are many situations where the customers component is too long for our standard sleeve. We therefore have a full range of long sleeves.

Dual Sleeve There are many situations where the customers component is too long for our extended sleeve. We can then mount dual combinations of the above sleeves. This provides a rigid method of clamping a long component.

Order online at www.ptgworkholding.co.uk 11 Special Drawbar Operated Grinding Mandrel

Contact us Today on Dual Sleeve Mandrel Arrangement +44 (0)117 970 1101 For a No-Obligation Quotation Order online at www.ptgworkholding.co.uk

SPECIAL APPLICATIONS Fail-Safe Spring Actuated Mandrel

12 16 SPECIAL APPLICATION ENGINEERING Special mandrel assembliesusedinaircraft assembly. Twin stationhydraulicallyoperatedmandrel CNCfixture forautomotiveproduction. ENGINEERING SPECIAL APPLICATION

on alltypesoffixtures for production onbothverticalandhorizontalmachiningcentres. Not allapplicationsare used onlathesorgrindingmachines.Themandrel systemcanbeused The veryproblem youface mayhavebeensolvedbyusforanexistingcustomer. team hasprovided countless solutionstocustomersrequiring specialworkholdingsolutions We haveatourdisposala highlyexperiencedengineeringdesignteam.Overmanyyears,our 13 ENGINEERING APPLICATION SPECIAL CHUCKING APPLICATIONS Turbo gear hobbing chuck gear hobbing Turbo PTG Workholding Limited can also design and manufacture special application special application also design and manufacture Limited can PTG Workholding and grinding a wide variety of CNC or manual lathes chucks for use on machines. chucks, include: diaphragm chucks manufactured Examples of special and twist finger chucks. chucks, gear pitch line chucks compensating spring-jaw

CHUCKING APPLICATIONS CHUCKING Compensating spring jaw grinding chuck CHUCKING APPLICATIONS CHUCKING 14 FREQUENTLY ASKED QUESTIONS 15 www. form for more information. The form for more . Order online at www.ptgworkholding.co.uk . Alternatively, you can contact us by telephone on +44 you can contact . Alternatively, www.ptgworkholding.co.uk Special Sleeves and Applications form is online at enabling quick loading and unloading. and replacement? What about repairs the expansion angle re- by having can generally be reconditioned All our mandrels sleeves will maintain the original accuracy of the unit. replacement All ground. a workholding solution for my problem? provide Can PTG Workholding of upon receipt requirements can customise to the customer’s PTG Workholding Yes, machine and component data. Please see the Our sleeves have a standard expansion range of 0.80mm. expansion range Our sleeves have a standard designed to fit only one sleeve? mandrels Are range of sleeve sizes. is able to accommodate a wide No, one mandrel clamping power? What is the mandrel’s deliver length, our mandrels’ sleeve clamping along the entire Thanks to 360-degree action on to the This is further enhanced by the pull-back clamping power. greater locator. ? the component after Is it easy to release of a component, self-release our double-angle system guarantees the automatic Yes, How do I place an order? How do I place an at with our web site and easily by registering can be placed quickly Orders ptgworkholding.co.uk fax on +44 (0)117 970 1181. (0)117 970 1101 or of the workholding system? What is the accuracy which is maintained a guaranteed accuracy of 0.013mm, Our system delivers a gauge fit. constantly as mating surfaces wear to What is the expansion range? FREQUENTLY ASKED QUESTIONS ASKED FREQUENTLY PTG Workholding Ltd. 73 High Street, Staple Hill Bristol, BS16 5HE Registered in England Company No. 2963866

tel: +44 (0)117 970 1101 fax: +44 (0)117 970 1181 www.ptgworkholding.co.uk