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Contents
1.2. 1000
3. 2 4 HO32M
4. BREE
5. 3 3 9 GOOD NO GOOD 1 4 1 AA 4 b 1 4 GER 1 4 9
6. _ 5 6 8 6 8 10 12 4 2 2 1 8 2
7. 1 2 8 DEKO 2mm ak 1 2 Z 1 2 1
8. TANS B11 6 1984 Tik BEE
9. 8 BO D X
10. BNO
11. ETE 8 1 EP 4 1 EP 100 OOO5 1 1 3 AIG gt ig gt ig OF gt ig 4 2 TEL 03 3287 1155 FAX 03 3287 8460
12. 6 4 2 2 eg to t2 TAR mm 0 020 TLR mm 0 020 3 3 N m A
13. 7 2 5 4 m CL 2 5 5 JIS BO9O5 1992 4mm s
14. lt _um e 3 2 O yas ay
15. 3 6 menos ak piece aici ANSI B1 1 6 NN i OS SS eh A r E 13 3 6 1 BEE
16. OUWAARACUCE SSH SO 6 9 RGO Nm A SEAL 6
17. 19 6 6 1 gt mm mm mm r min 190 2 MPa 26 Ss 160 MPa l 26 1 4 GD 2 C1TA19O 43mm 3 20 6 2 21 6 3 6 4 REET
18. lt F DOS SOC 25258 D B
19. ME Pp 6 8 3 1 1 1 HO32M A 1 2 AS
20. dj 11 12 Y
21. 5 2 5 2 5 1 2 5 2 C C O0040 gt OO5Omm 2 5 3 O 8 6 O
22. 3 4 3 5 VDI No 31O6 V
23. BR TE RG ee eerie eee a 24 Table of contents
24. 10 P 10 10 OXT D oD
25. He
26. wW D ER DK k ab gt ig OF G W PR 2 lt 8 1 ald 4 1 EP
27. 14 3 6 3 ax So A
28. 2S A Ss 9 TORTE 4A weaves
29. ANSI B1 1 6 1984 A TANS B1 1 6 1984 ANSI B11 6 1984 3 6 4 44 15 4 1
30. ERA d d 7 1 6a d h 1 6a
31. 16 4 3 TANSI B11 6 1984 section 7 1 9
32. 2 3 4 5 7452 8601 1900 1 TEL 052 408 1254 FAX 052 409 3766 6 S 1MPa 10 197kgf cm2 lt 1kN 101 97kef 1N m 0 10197kgf m
33. 12 3 5 1
34. d d DS d XO 7 OXT D D d d gt DZ d XO 75 D D
35. 1 2 3 5 2 6
36. 44 ANSI B1 1 6 1984 section 4 3 2 3 6 2 A TANS B11 6 1984 1 4 6 mm
37. Form d part where the work piece is held keeping the ring as above mentioned Diameter d should be formed in the same diameter as the gripping diameter of the work piece approx allowance h6 and its surface finish should be better than 1 6a A finished surface with a higher precision will be obtained if the formed ring is re gripped before the final finish forming After finished forming of top jaws grip the work piece and make sure that required jaw stroke and gripping accuracy are obtained After finished forming of top jaws grip the work piece and make sure that required jaw stroke and gripping accuracy are obtained Chuck center line for Zo forming D Chuck center line for forming d Chuck center line for forming d Chuck center line for forming D Remarks When machining a bar stock keep in mind that the chuck may lose stable gripping force and the work piece may slip because a long work piece may vibrate and the top jaws cannot firmly grip a work piece with a smaller diameter In such a case secure a greater gripping length in the axial direction to improve gripping stability Figures 11 and 12 show examples of top jaws formed to secure a greater work piece gripping length by moving the gripping location of the formed plug from
38. 8 32 9 3 3 1O 34 12 35 D ee ee eee 12 351 13 352 13 36 13 3 6 1 14 3 6 2 14 3 6 3 eee ee ee ee ee eee 15 364 15 4 16 41 16 42 SREB ee ee ee eee ee eee 16 4 3 17 44 18 5 ee ee ee eee 19 6 TERRE t ee ee i es 20 Si iioi ei ae ee UES Sick ao gs 20 G62 FI IT ES RS i 21 63 22 64 22 6 5 23 66 24 RISE Sake 0 0 es ea MS 24 1 HO32M
39. 17 4 4 wb TVET UY IE RY 0 IN O a A JW JN gt 18 7X 7X TVET UY IE RY U IO W IO IO W 5
40. 5 Troubleshooting When there are any troubles with the operation of the chuck the following causes are likely Please check these before contacting us for service Possible cause Recommended remedy Chuck does not operate Insufficient master jaws stroke Damaged parts on chuck Disassemble and repair Seizure of sliding contact part Disassemble and repair with oilstone or replace Rotating cylinder inoperative Chips heavily accumulated inside Check the piping line If no problem is detected disassemble and clean the cylinder Disassemble and clean Loosened joint between rotating cylinder and connecting pipe Remove the rotating and retighten cylinder Work piece slips Poor accuracy Insufficient top jaws stroke Adjust so that top jaws come near the center of the stroke when they grip the work piece Insufficient pressure Increase pressure to the set level Top jaws do not match the work piece diameter Correct top jaws forming in right way Excessive cutting force Calculate the cutting force to see if it matches the specification of chuck Insufficient lubrication at master jaws and sliding parts Supply grease from grease nipples and open close the top jaws a few times while no work piece is gripped Excessive speed of revolutions Chuck runs out Reduce the speed till the necessary gripping force is assured
41. 2 SN NIS Se oe gt C S Re 1 Re 3 JLT zoma e alel Re 1 44 Re Re 3
42. F 5 JIS BO9O5 1992 OXI MERRI ISO1940 1 1986 ISO8821 1989 5 zaenorssen o 2 3 4 6 3 3 1 44
43. 60 50 HOS2M12 40 HO32M10 30 kN 20 HO32M8 el HO32M6 0 LE S J8 J6 J7 1000 2000 3000 4000 Dia r min i J1 J10 CN N 19 J11 J9 22 6 5 2mm n m RAMIRES X A 23 6 6 MABICILF vy DAOC FREON ETATEN CUETO CHEB T lt IERU
44. Check peripheral and end face run out and retighten bolts Stopper end face runs out Correct the run out stopper end face Dust has entered the master jaws or serration of top jaws Remove top jaws clean serration part thoroughly to remove dust Jaws fastening bolts not tightened securely are Fasten bolts sufficiently but not too much Jaws are not formed properly Confirm if the forming plug or the forming ring is in parallel with chuck s end face and if the forming plug or the forming ring is not deformed by gripping force Also check forming pressure and jaws surface roughness Jaws are deformed or jaws fastening bolts are extended due to excessive jaws height Lower the height of jaws as much as possible Excessive jaw height may reduce the service life of the chuck Deformation is caused at specific portion of jaws because a very heavy work piece is held by jaws only Try to grip the work piece at around the centerline to avoid eccentric distribution of load to any specific jaws Work piece is deformed due to excessive gripping force 19 Reduce the gripping force to a reasonable amount to assure proper machining 6 Specifications 6 1 Specifications Series number Specifications Jaw movement Dia Plunger stroke Cylinder stroke Recommended outside chucking diameter for standard soft jaws Max Speed Max input force Clamping force at
45. Precautions For Use 3 1 Selecting Top Jaws The chuck is equipped with a set of standard soft top jaws We are ready to prepare standard hardened jaws and special top jaws as optional accessories at your request If necessary place an order your from nearest Howa representative We disclaim all the warranties and responsibility for accidents caused by use of the top jaws not prepared by Howa 4A WARNING For all the chuck parts including consumables place an order with Howa Machinery Ltd Howa shall not be liable for any accidents caused by use of parts not supplied from Howa Any and all warranties are invalid unless only Howa s genuine parts are used A WARNING Do not use any top jaws which are heavier than those supplied with this chuck If the mounted jaws are heavier than the standard soft jaws or standard hardened jaws the chuck will lose extra gripping force by the centrifugal force due to excess in weight This in turn may cause the work piece to fly off and may cause severe personal injury or death to the operator or bystanders 8 When using the top jaws that are higher than the standard top jaws lower the cylinder force in inverse proportion to the top jaw height If the distance H from the chuck front end face to the gripping position is greater than the height X of the standard soft top jaws dimension X in the following figure or in the table of dimensions a force larger than the allowable value
46. D is given by following formula d diameter of plug d lt D d max jaw stroke x 0 75 Close the master Jaws to the limit by operating the hydraulic or pneumatic circuit Then form D part where the ring is held Diameter D is given by following formula d diameter of ring d gt DZ d max jaw stroke x 0 75 Operate the hydraulic or pneumatic circuit and grip the formed plug at D part pushing it to the chuck face preventing inclination of the plug The operator must take care not to pinch his her hand when gripping the forming plug If caught his her hand will be injured Operate the hydraulic or pneumatic circuit and grip the formed ring at D part Be careful not to incline the ring to the chuck face The operator must take care not to pinch his her hand when gripping the forming ring If caught his her hand will be injured Form d part where the work piece is held keeping the plug as above mentioned Diameter d should be formed in the same diameter as the gripping diameter of the work piece approx allowance H7 and its surface finish should be better than 1 6a A finished surface with a higher precision will be obtained if the formed plug is re gripped before the final finish forming
47. Dow Corning Corporation For all the chuck parts including consumables place an order with Howa Machinery Ltd Howa shall not be liable for any accidents caused by use of parts not supplied from Howa Any and all warranties are invalid unless only Howa s genuine parts are used Use eyebolts when mounting or removing the chuck Use the suspender belt when handing a 6 inch chuck and eyebolt when handling an 8 inch or larger chuck Otherwise you may drop the chuck or suffer from lumbar injury due to excessive load NOTE The words of gripping force and clamping force are used as a synonym in this instruction manual Both words mean total force of clamping each jaw in a chuck 3 1 Construction and Operation 1 1 Model Coding The crank type long jaw stroke power chuck H032M are model coded as follows H032M A L JIS specified spindle nose No No mark Having a straight socket for installation of chuck standard model Including an adapter or a back plate Spindle nose No 5 6 or 8 Size No 6 8 10 12 1 2 Construction and Operation The crank type long jaw stroke power chuck basically Fig 1 consists of a chuck body a draw screw a draw F Jaw Nut ulcrum Pin y sleeve fulcrum pins crank levers and master jaws The out put force and movement of cylinder CrankLever transmitted to the top jaws through the draw s
48. Max input force Total jaw force Moment of inertia J Note1 kg m Weight with standard k soft jaws 9 Matching cylinder Series number Max pressure to operate chuck Series number Max pressure to operate chuck Note 1 The four times of this value is equivalent to GD 2 When the chuck is coupled with C1TA190 the jaw stroke is limited to 43mm caused by the insufficient cylinder stroke 3 If the plunger stroke of a chuck is shorter than that of cylinder the latter must be adusted to the former This cylinder is required limiting of stroke 20 6 2 Dimensions Series number Adapter 21 6 3 Gripping Force The following graph shows the gripping force of the rotating chuck equipped with the standard soft jaws Dynamic gripping force 60 50 ed H032M12 gt 40 H032M10 2 5 30 D Cc Z H032M8 20 0 el H032M6 10 Ean 0 1000 2000 3000 4000 Chuck speed r min 6 4 Standard Soft Jaws The following table shows the dimensions of standard soft jaws 66 J8 J7 J6 J10 J2 J3 S gt J4 J5 p J11 J6 J3 J9 Serration pi
49. Oke ae A C6 8 2 2 6 6 2 3 HO32M A
50. Se 24 LMITED WARRANTY Ne 24 Introduction 1 This instruction manual describes the crank type 3 jaw long jaw stroke power chuck H032M standard model 2 Please read this manual carefully and fully understand the procedures for installation operation inspection and maintenance before operating the chuck 3 Ignoring any instructions in this manual may result in a serious accident or machine damage leading to injury to the operator or personnel near the machine 4 Always keep this manual handy and use care not to lose it 5 Please contact us phone and fax numbers are shown below for information regarding this manual and the objective product Another copy of this manual is also available from the following address HOWA MACHINERY LTD INDUSTRIAL EQUIPMENT GROUP MACHINERY DIVISION 1900 1 SUKAGUCHI KIYOSU AICHI 452 8601 JAPAN Phone International access code 81 052 408 1254 Facsimile International access code 81 052 409 3766 6 The values of this manual are described in SI unit system Values of former unit system can be obtained by following calculations Pressure 1MPa 10 197kgf cm2 lt Force 1kN 101 97kgf Torque 1N m 0 10197kgf m Safety Information This manual contains warning messages for safe operation that are indicated by Safety Alert Symbols Carefully read and fully understand these messages The danger levels of the Safety Alert Symbols are defined below A DANGER Indicates an imminent
51. be sure that the pneumatic or hydraulic pressure needed to operate the chuck is being supplied to the rotating cylinder If not supplied or not sufficient the work piece could slip out and fly off as the cutting starts and may cause severe injury or death to the operator and or bystanders NOTE ANSI B11 6 1984 prescribes installation of an interlock circuit for preventing chuck rotation or an audible or visible warning system activated when the required pressure is not supplied to the cylinder gripping side Perform a test run at low speed before cutting to verify that the top jaws or the stopper does not interfere with the turret or tools AA WARNING To make sure that there will be no interference of the top jaws or stopper with the turret or tools do a test run cycle at low spindle speed without work gripping Should there in fact be interference the resulting sharp collision may cause the top jaws or the stopper to fly off which may lead to severe injury or death to the operator and or bystanders AA WARNING To comply with ANSI B11 6 1984 section 4 3 2 you need to install a check valve and an accumulator in the connecting area with the chuck so that the hydraulic or pneumatic system does not loose pressure in case of failure Besides check valve and accumulator it is essential to install a shielding cover that separates the chuck and work piece from the operator or bystanders Without such a cover the work piece chip
52. is applied to the top jaw installation bolts even when the chuck is operated within the permissible cylinder force specified in the specification or product catalogue As a result the installation bolts may be broken and the top jaws and or work piece may come off This may in turn Cause severe personal injury or death to the operator or bystanders Even if the top jaws installation bolt does not break the great force exerted upon the sliding portion of the master jaws due to this peculiar application procedure will shorten service life considerably H gt X Max Input Force in Spec table eS 3 2 Installing Top Jaws Fig 7 1 Select the top jaws in terms of the work piece and install them on the chuck Before doing so however clean off the Jaw Nut fitting portions of the top jaw and master jaw serration as Master Jaw Top Jaw well as those of the jaw nuts with a compressed air blast What dirt or foreign matter remains can be loosened with cleaning oil brushed vigorously then blown off by o compressed air f He NOTE SEE When a serration is damaged it is similar to when dirt clings to the serration the top jaw is not seated properly causing poor accuracy When the damage is noticed a whetstone and file should be used to repair it 2 The t
53. near the chuck end face to the upper jaw surface The tops jaws are also formed to increase the gripping stability so that the work piece can be gripped just as if the jaws were rising in the forming condition Method for gripping Formed Plug Formed Ring Fig 11 Fig 12 formed plug near the chuck end face Jil 3 4 Installing Stopper To position the work piece in the chuck s axial turning direction the work piece must be pushed to the top of the jaws or the chuck s front face But in some cases depending on the work piece configuration a stopper has to be installed on the front face of the chuck When designing a stopper obtain our approval of the stopper drawings Howa is not responsible for any accidents caused by a stopper designed without our approval 3 5 Setting Working Conditions The chuck using conditions includes not only cutting force but also many factors such as cutting force work gripping length work protruding length friction coefficient and rotational speed In order to determine the ideal working conditions all of these factors must be given due consideration with considerable time necessary to perform the calculations The VDI Standard No 3 106 put out by the German Technicians Association is a good reference in this regard For your copy write Beuth Verlag GmbH Postfach 1 145 1000 Berlin 30
54. 2 CRANK type 3 JAW LONG JAW STROKE POWER CHUCK HOS2M INSTRUCTION MANUAL A A IMPORTANT Be sure to read and understand this instruction manual thoroughly before operating this product ees Please save this manual When ownership ZR 243A of this product is transferred submit this manual to the new owner HOWA MACHINERY LTD REDIEOIC 1 4 1 1 BE GE ES Se PO a NY 4 12 4 2 5 24 RIAN eet ee ee ee ee ee ee ee 5 22 RG GE HTS EN GE ROG i TR TE 5 2 3 5 24 5 25 Bo ee Be ta Sa CT Be mw i ee SN is 6 2 5 1 6 252 6 253 6 254 8 255 8 3 8 3 1
55. D RE No3106 Id 2 VDI No 3106 6 3 T
56. Introduction Safety Information Safety Precautions 1 Construction and Operation pp 4 1 1 Display Form ieee 4 1 2 Construction and Operation pp 4 2 nstallatlON Eo es wy slaeas cncdduas ecteren once owed euas 5 21 UPPACKING eiennenn 5 2 2 Accessories EE 5 2 3 Preparations for Installation pp 5 2 4 Stroke Control pp 5 2 5 Installation Procedure pp 6 2 5 1 Before Installation pp 6 2 5 2 Installing Chuck Adapter pp 6 2 5 3 Installing Chuck pp 6 2 5 4 Inspection RN 8 2 0 9 Balante narei e e a e a 8 3 Precautions for Use 8 3 1 Selecting Top Jaws pp 8 3 2 Installing Top Jaws ppp 9 3 3 Forming Top JaWS ppp 10 3 4 Installing Stopper 12 3 5 Setting Working Conditions pp 12 3 5 1 Permissible Cylinder Force pp 13 3 5 2 Work Deformation 13 3 6 Precautions for Operation ppp 13 3 6 1 Before Gripping Work piece 14 3 6 2 When Gripping Work piece ee 14 3 6 3 During Cutting Operations 15 3 6 4 End of Operations pp 15 4z M intenan Ee eetere rer ee a e i 16 ee 16 4 2 Disassembly and Cleaning pp 16 4 3 Setting Safe Rotational Speed i 17 BAY PENS EIST aoaaa n a a 18 5 Troubleshooting SE des 19 6 Specifications i 20 6 1 Specifications 3 20 62 IDIMPENISION NS co 21 6 3 ASMP PING FOrCE IS 22 6 4 Standard Top Jaws pp 22 6 5 Allowable Machining Area of Chuck Body 23 6 6 JACCESSONES
57. West Germany NOTE Howa is happy to send you a copy of the English version of the above standard upon request A WARNING The gripping force during rotation can be determined from the chart in subsection 6 3 Gripping Force The values shown in this chart are obtained under the following conditions Standard top jaws are installed The standard top jaws are so installed that the each peripheral surface coincides with that of master jaw The gripping force measuring instrument is held at the middle of the full jaw stroke Gripped with maximum cylinder force The allowable maximum rotational speed is arbitrarily determined by Howa in consideration of the chuck performance and the strength of each part Hence this speed is not suitable to assure safety in every situation because it is greatly influenced by top jaw configuration weight dimensions and shape cutting force gripping force and the maintenance conditions All such influencing factors fall within the realm of user responsibility Excessively high rotational speeds for a given set of conditions may cause the work piece to fly off and may in turn cause serious injury or death to the operator or bystanders 12 3 5 1 Permissible Cylinder Force The permissible cylinder force indicated in the specification table or catalogue is a force at which the chuck will not suffer damage presuming those standard soft jaws or standard hardened jaws are used This maximum force may be used
58. You may drop the chuck or suffer from lumbar injury due to excessive load 2 2 Accessories The package box contains the accessories besides the chuck itself Please refer to the section 6 6 Accessories for particulars 2 3 Preparations for Installation Except the direct mount chuck of H032M A type a chuck adapter is needed to install the chuck onto the lathe spindle Contact us if you need information on how to design a chuck adapter In addition to the chuck adapter a rotating cylinder a cylinder adapter a connecting pipe and either a hydraulic or pneumatic pressure source are required to operate the chuck However please refer to the Rotating Cylinder Instruction Manual for what pertains to them We upon request will review drawings for the connecting pipe AA WARNING The user must fabricate a connecting pipe in accordance with the lathe used and the chuck which has been selected It is extremely important that connecting pipe be sufficient to assure rigidity and strength Insufficient strength or rigidity will cause breakage of the connecting pipe and instantaneous loss of gripping force to the chuck This may cause the work piece to be released during operation 2 4 Stroke Control For type A spindle mounting H032M chuck the cylinder stroke of the rotational cylinder and the plunger stroke of the chuck must be equal If the rotational cylinder stroke is longer than the plunger stroke of the chuck the forme
59. as required of course but ordinarily long term use under conditions of maximum force is not recommended To maintain long term gripping precision one must keep sufficient work holding force in relation to the cutting force and with adjustment for sufficient but not excessive gripping force the most effective performance will be achieved The use of excessive input force will lead to breakage of chuck parts or bolts and sudden loss or gripping force If such a mishap takes place while the chuck is rotating the work piece may fly oft causing severe injury or death to the operator or bystanders In the case of ID gripping ensure that the cylinder force does not exceed half of the allowable cylinder force If a cylinder force that exceeds half of the allowable value is applied to the chuck the chuck parts or bolts will be broken and the gripping force will be lost instantaneously If such an accident occurs during chuck rotation the top jaws or the work piece will come off causing severe injury or death to the operator or bystanders 3 5 2 Work Deformation When a work piece tends to be easily deformed lowering the gripping force can minimize the deformation However when the rotational speed becomes too high it is less easy to support the work piece due to the effect of the centrifugal force Thus great care must be taken when lowering the gripping force To take better measures against deformation design the jaw configuratio
60. ded as accessories Install for the periphery and the end face the chuck body do not deviate exceeding the limits indicated in Table2 Table 2 Chucksize 6 8 10 12 Runout the outer periphery T I R mm 0 020 Runout the end face T I R mm 0 020 For the torque to be applied to the chuck installing bolt refer to Table 3 Table 3 Tightening torque _ N m Fasten the chuck installing bolts with recommended tightening torque If the torque is largely different from the recommended value lower or AA WARNING higher the bolts may break and the chuck and or work piece may fall out this presents a hazard that may cause severe personal injury or death to the operator or bystanders 7 Turn the draw screw with a special wrench and adjust the location of the master jaw Appropriate location of the master jaw at the advance end is where the dimension S1 from the periphery the chuck body in Fig 5 becomes the value indicated in Table 4 The draw screw has a click steel ball and spring for anti rotation and therefore stop the draw screw at a point where its revolution becomes heavy and adjust the master jaw position Table 4 mm Fig 2 Chuck size 6 a a ia 1 1 8 The operation is completed when the top jaws have been installed 9 If you installed the chuck by screwing the eyebolt into the chuck periphery remove the bolt Be sure
61. gular contours which are not readily visible while rotating A door or guard must be provided to prevent anyone from approaching the spinning chuck NOTE ANSI B11 6 1984 prescribes use of a door or a guard to keep the operator from approaching the rotating part s A DANGER Never operate the rotating cylinder selector valve while the spindle is rotating Otherwise the gripped work piece may come off and fly out NOTE ANSI B11 6 1984 prescribes the installation of a safety circuit to nullify opening or closing of the chuck during its rotation and the need to protect the operator from inadvertent opening or closing of the chuck usually by a shield ANSI B11 6 1984 also requires that when a foot pedal switch is used it must be protected from inadvertent operation 3 6 4 End of Operations AA WARNING Remove the work piece from the chuck at the end of operations If the work piece is left gripped in the chuck the cylinder supply pressure may decrease or the work piece may fall oft due to mistaken operations it may cause severe personal injury and machine damage 15 4 Maintenance 4 1Lubrication The most frequent cause of chuck failure is insufficient or improper lubrication If lubrication is insufficient or if a non specified lubricant is used not only will wear be accelerated the gripping force will be inadequate with the possibility of the work piece coming off during the cutting operation Adhere to
62. hould be such that there is one fourth of the jaw Sere ere stroke remaining as measured from the stroke end hal Thus if you are gripping the outside diameter OD of the work piece with the jaws one fourth of the inside stroke should remain while you are gripping the inside diameter ID with the jaws the remaining portion of the stroke should be on the outside refer to Fig 9 The cylinder pressure when the top jaws are formed should be the same as when the work piece is actually being cut See Fig 10 for the specific steps for forming the top jaws DO gripping fa L jaw stroke 2a 1 ee 2 te WZ ID gripping 10 Do not grip near the end of the jaw stroke Forged or molded work pieces have surface irregularity as far as they are not machined The chuck may not be able to grip such a work piece in a stable state Gripping a forged or molded work piece not machined near the end of the jaw stroke will cause insufficient gripping force and the application of the tool to the work piece may cause the work piece to slip out of the jaws and fly off This may cause severe personal injury or death to the operator or bystanders Prepare a formed plug Prepare a formed ring Open the master jaws to the limit by operating the hydraulic or pneumatic circuit Then form D part where the plug is held Diameter
63. ipping force is lost In addition depending upon the usage received by the chuck the gripping force should be measured periodically with a gage There should be a regular inspection for cleanliness as a function of the ability of the chuck to grip a work piece even though its gripping pressure may remain constant The chuck speed should be reviewed with each change in job Including reference to the feeding speed of a work piece a change in the size and weight of a work piece the composition of a work piece the type of cuts or machining performed and the speed or rate of cut AA WARNING Do not leave the chuck in the state where its top jaws or jaw nuts are not tightened If the spindle is rotated in such a state the jaws or nuts will fly out causing serious or fatal injury to the operator or AA WARNING bystanders Aside from damage to the chuck the chuck will be able to maintain a constant gripping force upon a work piece assuming that the hydraulic or pneumatic operating pressures do not change However the ability of the chuck to hold a work piece will deteriorate with wear and tear on the surfaces of the jaws of the chuck which will tend to reduce the coefficient of friction between the jaws and the work piece The ability of the jaws to hold the work piece will depend upon the work piece itself A larger diameter heavier work piece for example will exert greater force against the jaws of the chuck and therefore will more easily ove
64. leaning must be done on a regular basis every 1000 hours When doing so inspect carefully for parts wear and breakage replacing as necessary A WARNING If the chuck interior becomes jammed with chips the gripping force will decrease or the jaw stroke will become short If cutting is performed under such a condition the work piece may be disengaged from the chuck causing severe injury or death to the operator and or bystanders 16 Disassembling Procedure 1 Remove the top jaws 2 Arrange the master jaws in the middle of jaw stroke 3 Remove the set screw on the backside of the chuck body and then strike the fulcrum pin out with a pipe that has nearly the same diameter as that of the fulcrum pin The crank levers becomes free in chuck body 4 Remove the draw sleeve and draw screw 5 Remove the master jaws 6 Remove the crank levers Reassemble the chuck with reverse way to disassembling procedure applying specified grease sufficiently 4 3 Setting Safe Rotational Speed ANSI B 11 6 1984 section 7 1 9 suggests guidelines for setting a safe rotational speed A safe rotational speed will be a function of the consideration of among other things the degree of wear and tear then existing on the jaws of the chuck which may effect their ability to grip the work piece The jaws or chuck body should be replaced and or properly refurbished if the surface of the master jaw or the chuck body deteriorates so that gr
65. leeve Round Nut ane Ne and crank lever when the draw screw is pulled to the backward oe Top Jaw When the wedge plunger is drawn backward the REAR FRONT master jaws are pulled toward the center and the top hee U Master J jaws grip the outside of the work piece OD pays Master Jaw chucking Draw Screw When the wedge plunger is pressed forward the Draw Sleeve master jaws will move outward and the work piece Chuck Body inside is gripped by the top jaws ID chucking NOTE This manual regards the top jaw side as front and the draw screw side as rear 4 2 Installation 2 1 Unpacking Take the chuck out of the package box At this time be careful not to take out or lift it by hands This is because 8 inch or larger chucks weigh over 20 kg and lifting such a heavy chuck may cause damage to your lumbar or injury by dropping the chuck Instead break open the box and screw an eyebolt into the screw hole outside the chuck Then use a chain block to lift the chuck A CAUTION Use the eyebolt when installing or removing the chuck To lift a 6 inch chuck use a suspender belt To lift an 8 inch or larger chuck use an eyebolt
66. ly hazardous situation which if not avoided will result in death or serious injury These warning massages include the preventive actions those are indispensable to avoid danger AA WARNING Indicates a potentially hazardous situation which if not avoided could result in death or serious injury These warning massages include the preventive actions those are indispensable to avoid danger Indicates a potentially hazardous situation which if not avoided could result in minor injury or machine damage Ay CAUTION There are many hazardous situations that may occur during operation inspection and maintenance of the chuck used under various circumstances We cannot predict all of these hazards Accordingly the warning messages described in this manual do not cover all the hazardous situations Also there are too many things that are impossible or prohibited in chuck operation to describe completely in this manual We cannot assume any responsibility for any damage or accidents caused through operation inspection or maintenance that is not specified in this manual Safety Precautions The following precautions apply to handling maintenance and operation of the chuck Read and understand them carefully before use Never operate the rotating cylinder selector valve while the spindle is rotating Otherwise the gripped work piece may come off and fly out Ba Never put any part of your body inside the spindle cover
67. n as if the jaws wrap the work piece Also when the outside diameter of the work piece is not perfectly round the top jaws should be of a swivel type that allows the gripping force to be applied equally at six positions We assume no responsibility for any accidents caused by use of top jaws manufactured without our approval 3 6 Precautions for Operation We are the chuck manufacturer and are not responsible for the safe operation of the combined chuck and lathe or machining center into which the chuck is installed There exist numerous rules and guides for overall safe operation among the most respected is ANSI B11 6 1984 Nonetheless while reference may be made to ANSI and or specifications mere mechanical compliance with ANSI and or other standards does not ensure safety All standards should be considered only as elements of an overall safety consideration and when considered alone constitute only minimum standards What follows is a partial enumeration of universal precautions which should be taken in the normal course of operation Particular steps beyond or in addition to those which will be discussed below must be determined by the individual user after a complete review of all aspects of the work to be done AA WARNING A failure to guard the machine as whole may lead to serious injury or death to the operator or bystanders 13 3 6 1 Before Gripping Work piece 4A WARNING Before beginning operations check to
68. op jaws engage with the serration on the master jaws and the arrangement is secured with the jaw nuts and bolts This construction is adjustable only within a certain range for the top jaws and master jaws Adjust the top jaw position between the minimum and the maximum dimensions indicated by O in the table of dimensions see 6 2 When this O dimension is taken for maximum the peripheral surfaces of the master jaws and jaw nuts virtually coincide WARNING Do not use top jaw out of the adjustable range If the top jaws are installed in the radial direction outside of the adjustable range the master jaws or jaw nuts will break making the top jaws and or work piece come off in some instances This may in turn cause severe personal injury or death to the operator or bystanders 3 After determining the installing position secure the top jaws to the master jaws using the jaw nut and bolt Use the fastening torque for the bolts as indicated in Table 6 9 Table 6 Tightening torque N m AA WARNING Use exact torque for fastening bolts If less torque is used than specified in Table 6 above the bolts may loosen in the top jaws and or the work piece could come off If the torque is greater than that specified the master jaws and or top jaws will deform and defective operation will result leading to breakage and release of the top jaws and or work piece In either case the resulting flying off of work piece and or top jaws ma
69. particular purpose or use or against infringement of any patent In no event shall seller be liable for any direct incidental or consequential damages of any nature or losses or expenses resulting from any defective product or the use of any product 20051101 24
70. pindle mounting chuck and that of the connecting pipe will be as shown in Table 1 A CAUTION If the dimension Re is less than that indicated in Table 3 the chuck cannot be installed Fig 4 Table 1 mm a Chucksize 6 8 10 12 Re c D Connecting pipe 4A WARNING Adjust the screw depth of the connecting pipe Re to a proper length If the Re value is greater than that indicated in Table 3 the screw depth of the connecting pipe is not long enough to fully engage with the draw screw This will mean that the screw will be broken and all of the gripping force will be lost immediately If this accident should occur the work piece may fly off and in turn may cause severe personal injury or death to the operator or bystanders 4 Insert the special wrench equipped from the front side of the chuck and check to see whether the draw screw can be turned 5 Hoist the chuck with the chain block and screw in the draw screw into the connecting pipe until it can be tightened no more 6 A CAUTION Use extra care when operating the hydraulic or pneumatic circuit during the chuck installation If you actuate such circuits accidentally during chuck installation you may be caught between the chuck body and the spindle or between the top jaw and the master jaw resulting in injury 6 Secure the chuck body to the chuck adapter using the chuck installing bolts provi
71. r must be adjusted to the latter As the ways to control the cylinder stroke are different depending on types and sizes consult Howa for necessary information before the stroke adjustment 5 2 5 Installing Procedure Fig 2 2 5 1 Before Installation 710 005A After taking the chuck out of the package box wipe off all 4 10 010 anticorrosive oil clinging to it with a cloth permeated with cleaning A oil 2 5 2 Installing Chuck Adapter Install the chuck adapter on the spindle end face T Then the chuck installing socket C and datum face should be Chuck Adapter machined in place x Spindle The clearance of the chuck adapter in relation to the chuck installing socket C should be 0 040 0 050 mm in diameter Fig 3 f 2 5 3 Installing Chuck i 1 Remove the top jaws before installing the chuck Jaw Nut ii Top Jaw 2 The 8 inch or larger chuck has a screw hole for the eyebolt on the periphery Screw the attached eyebolt into this hole and lift the chuck To lift and install the 6 inch chuck use the suspender belt ee eee 3 Advance the connecting pipe to the advance end by activating the hydraulic or pneumatic circuit In this state the distance Re between the front end face of the chuck adapter spindle chuck installation face for the type A s
72. rcome the gripping capability of the jaws of the chuck Increase in the rpm will also add to the force which tends to pull the work piece out of the chuck and improper maintenance in the form of dirt rust improper or inadequate lubrication will also diminish the ability of the chuck to hold a work piece Finally the manner in which the work piece is machined in the lathe or machining center will determine the precise forces exerted on the work piece and therefore on the jaws of the chuck and may overcome the ability of the jaws to hold the work piece It is therefore absolutely required that the ability of the jaws of the chuck to hold the work piece be reviewed with each new set up or job and periodically during the course of a long job Machine operations of the lathe which produce forces sufficient to overcome the gripping force of the jaws of this chuck will cause the work piece to fly out which in turn may cause severe injury or death to the operator or bystanders 17 4 4 Parts List Parts Name Q ty Chuck body 7 Parts Name Jaw nut Draw sleeve Spring Pin Steel ball Draw screw Hex socket head bolt Round nut Hex socket head bolt Crank lever Grease nipple Fulcrum pin Grease nipple Master jaw Screw 1 2 3 4 5 6 7 8 9 Top jaw CO co o Screw 18 ID
73. remove the eyebolt when the installation is carried out with using an eyebolt AA WARNING If you rotate the chuck with the eyebolt being screwed you may be caught by the part of your body or clothing and get injured 2 5 4 Inspection Operational resistance develops when there is some abnormality in the installation procedure If the chuck is used without removal of the resistance parts seizure or abnormal wear may occur causing marked shortening of service life Once the installation has been completed be sure to check out the minimum operating pressure If it is too high remove the chuck and solve the trouble 2 5 5 Balance When the chuck is additionally machined or equipped with jigs ensure that the chuck weight is balanced Unbalanced chuck will cause vibration and fail to maintain required machining accuracy When machining an unbalanced work piece take the eccentric mass of the work piece into consideration and rotate the chuck at a low speed This is because the centrifugal force due to eccentric mass applies to the top jaws The chuck balance described in this manual is based on the standard balance quality 4 mm s defined in JIS BO905 1992 and the unbalance amount of the chuck periphery is specified as shown in Table 5 International Standards that correspond to JIS B0905 1992 are ISO1940 1 1986 and ISO8821 1989 Table 5 Chucksize 3 96 BS 0 i Max unbalance_ g 2 3 4 6 3
74. s D 5 S1 4 RA vz297 6 8 10 12
75. s or tool fragments will fly out causing severe injury or death to the operator and or bystanders 3 6 2 When Gripping Work piece A CAUTION When gripping the work piece with the chuck be careful not to get any part of your body caught between the top jaws and the work piece or between the work piece and the machine The operator s hand may be injured NOTE ANSI B11 6 1984 prescribes installation of a shielding cover guard so that no part of the operator s body can be caught between a part of the chuck and the surface of the work piece when the space in between exceeds 1 4 inch with the jaws fully opened 14 3 6 3 During Cutting Operations In any of the following cases the tool impact on initial cutting contact may result in an unexpected cutting force in excess of chuck work holding capacity The back end of the work piece is away from the chuck s stopper face The rotating center of the work piece is not aligned with the chuck rotating center The work piece is a casting or forging part having a projecting gate or burr This may cause the work piece to slip out which may in turn cause severe injury or death to the operator or bystanders If this situation is possible begin tool contact with the work piece initially during a low speed test run A WARNING Severe personal injury may result if the operator mistakenly comes into contact with a spinning chuck whose top jaws or gripped work piece have irre
76. tch J7 J8 J9 J10 J11 J15 Serration pitch 22 6 5 Allowable Machining Area of Chuck Body Tapped and or pin holes necessary for mounting a stopper or rough guide may be additionally machined on the chuck body within the boundaries defined below NOTE The periphery of each additional hole should be at least 2 mm away from the boundary The holes should be located and sized to maintain the chuck in balance m Maximum depth X 23 6 6 Accessories The package box contains the accessories besides the chuck itself Hex socket head bolt for mounting the chuck Hex key spanner Eyebolt Special wrench for adjusting the draw Screw LIMITED WARRANTY Seller warrants its products to be manufactured in accordance with published specifications and free from defects in material and or workmanship Seller at its option will repair or replace any products returned intact to the factory transportation charges prepaid which seller upon inspection shall determine to be defective in material and or workmanship The foregoing shall constitute the sole remedy for any breach of seller s warranty Seller makes no warranties either express or implied except as provided herein including without limitation thereof warranties as to marketability merchantability for a
77. the following guidelines for lubrication Lubrication Points Recommended Time of Lubrication Lubricant Grease nipples on Once every 8 hours outside of chuck Me Ree as but where coolant is constantly used body once every 4 hours Recommended oil MOLYKOTE EP GREASE supplied from Dow Corning Corporation Insufficient lubrication will lead to lower gripping force and create abnormal friction and seizure If the cutting is done in such conditions the work piece will come off and may cause severe injury or death to the operator and or bystanders Lubrication with non specified lubricants may also permit extraordinary corrosion and or wear and will lead to a loss of gripping force AA WARNING The operator and or bystanders may be seriously injured or killed if improper lubricants are used Improper lubricants may reduce gripping force of the chuck and permit work pieces to fly out of the chuck AA WARNING Failure to use an anticorrosive coolant can cause rust build up inside the chuck that increases friction This may reduce gripping force of the chuck and work pieces may fly out of the chuck This causes serious injury or death to the operator and or bystanders as well as damage to the machine AA WARNING 4 2 Disassembly and Cleaning Even with proper lubrication fine chips or scale can enter the chuck to jam the area of the jaw guide or draw sleeve thus preventing smooth operation Disassembly and c
78. while the spindle is rotating Otherwise you may be caught in the rotating elements w Route the solenoid valves so that the chuck keeps clamping the work piece even if the power is interrupted Otherwise the gripped work piece may come off and fly out w Keep the hydraulic pressure constant while the chuck is gripping the work piece Otherwise the gripped work piece may come off and fly out w RNING gt Turn off the power before installing inspecting or servicing the chuck Otherwise you may be caught in the rotating elements Always operate the chuck within the maximum speed described in the specification table Increase in the chuck speed lowers the gripping force and the chuck may lose hold of the work piece al Securely tighten the bolts with the specified torque Otherwise the bolts may become loose or damaged resulting in coming w off or flying out of the parts or the work piece The table below shows the bolt sizes and their tightening torque Tightening torque Bolt size M6 M8 M10 M12 M16 Tightening torque N m 12 1 29 4 57 9 101 161 2 Lubricate the chuck periodically gt Failure to lubricate the chuck may remarkably shorten the lifetime of the chuck Lubricate the chuck once in eight hours of operation However when using a large amount of water soluble coolant lubricate once in four hours Recommended oil MOLYKOTE EP GREASE supplied from
79. y lead to severe personal injury or death to the operator and or bystanders 4 Two bolts are used for one top jaw As long as the installation bolts Fig 12 provided for the standard soft jaws or standard hardened jaws are 2mm or less used the screw depth of the bolts in relation to the jaw nuts is no problem since the value is neither too much nor too little Should there be other bolt nut combinations however be sure to keep the screw depth so that the tip of the bolts will be within 2 mm from the lower surface of the nuts or at least not projecting out from below the nuts lower surface AA WARNING Use two bolts to secure one top jaw Be sure to chouse the bolts with appropriate length Use two bolts to secure one top jaw If only one bolt is used the top jaw and or the bolt may break If the bolts used to secure the top jaws are screwed in too shallow into the jaw nuts the jaw nuts could break Or if the bolts protrude from beneath the lower surface of the jaw nuts the top jaws are not secured no matter how far in the bolts are screwed In either case if the screw depth is improper the jaws and or work piece may fly off from the chuck and in turn may cause severe personal injury or death to the operator or bystanders 3 3 Forming Top Jaws When the top jaws are installed they must be Figa machine formed to align flush with the work piece GOOD NO GOOD When the work piece is gripped the jaw stroke L jaw stroke s
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