H01MA H022M H024M
Contents
1.2.
3. As 1 2
4. 1OOO
5. 18 4 4 HO1MA4 5 8 17 HO1MA6 12 19 INR
6. F E DDS Qo
7. 3 5 VDI No31O6 VDI No 3106 VDI No 31O6
8. 10 3 3 pee oe Ty Ty 1 4 H we ahad 1 4 1 4 10 11
9. 1 3 T 13 3 5 1
10. ANSI B11 6 1984 section 4 3 2 3 6 2 TANS B11 6 1984
11. JL 6 8 2 2 6 6 2 3 A
12. 1 2 ao 2mm Az s 1 2 1 2 1 D
13. REODEDIC ig OF Q X
14. A 27 gt 70 ts PHP OLA ng an 24 HO1MA
15. W D 2 8 1 ald 4 1 EP lt COREA 6
16. 25 4 m CL 23 27 HH4C O 5MPa 8 2 5 5
17. 3 5 2 6
18. 9 Ass H X
19. zs WM US BASS HH4C HOSCH 1 4 GDZ 2 8 26 HO24M HH4C 1 4 GDS 2 Ur 3
20. 27 6 2 EER ca BIE DASHED REENER 130 i 200 120 N HO1MA21 HO1MA12 HO1MA24 100 150 S MN HO1MA10 me rw HO1MA15 x gt HO1MA8 NN HO1MA18 i 100 w eo Ja S Y HO1MAG a a HO1MA5 PSY A4 50 20 0 1000 2000 3000 4000 5000 0 800 1000 1500 2000 2500 Bes r min Be r min 100 FE HO2 M2 30 HO22M10 HO22M8 70 AO KN Eal HO24M12 lt
21. 3 HO1MAG 12 HO1MAS 12 A 4
22. 31 Table of contents Introduction Safety Information Safety Precautions 1 Construction and Operation 1 4 MMOGGIOOGBINOEEEKRNKMN tend ate ec etusceness 4 1 2 Construction and Operation i 4 2a Installation es 5 2 WEDD AC KING on ES de 5 2 2 ACCeSSOrI S ieee 5 2 3 Preparations for Installation 5 24 Stroke COMMON oR 5 2 5 Installation Procedure 6 2 5 1 Before Installation 6 2 5 2 Installing Chuck Adapter 6 2 5 3 Installing Chuck 7 2 5 4 6 19 1 17910 stan eee 11 8 2 05 Balante 2 SE 9 3 Precautions for Use i e 9 3 1 Selecting Top Jaws irri 9 3 2 Installing TOP Jaws ii 10 3 3 Forming TOD JAWS sets iii 11 3 4 Installing Stopper 13 3 5 Setting Working Conditions 13 3 5 1 Permissible Cylinder Force ns 14 3 5 2 Work Deformation 14 3 6 Precautions for Operation 14 3 6 1 Before Gripping Work piece ee 15 3 6 2 When Grippi
23. D BE 22 6 6 1 HO1MA I J mm mm Rea r min kN kN HH4C HOSCH 2 1 CORO 4 GDZ 3
24. 17 D 4 3 TANS B1 1 6 1984 section 7 1 9 6
25. JIS BO905 1992 4mm s F 6 JIS BO905 1992 ISO1940 1 1986 SO8821 1989 RGO ta 5 8 10 12 45 48 24 2a Taenorssen o 1 213 4 6 10 45 20 go 3 3 1 T
26. A 38mm 1 5mm 1 5mm 3mm Az zs
27. pen EEE fF 3 2 8 act ie
28. O WAARAC LCR as 7 10 R7 29 4 579 101 128 161 251 Nm Az zs 7
29. d d d 7 h6 FE 1 6a H 1 6a l H Hi
30. H2 JH3 AR ZN VARY JH2S JH26 JH1 V JH10 Y gt 9 F f mima es i IA 3 JH ya JH7 JH7 JH6 120 136 136 169 145 199 154 238 29 6 6 HO1MA KI 1 6 3 HO1MA B 12 e 3
31. m JAIS Z onmo HO1 MA JIS A c gt 210 18O 180 225 106 375 106 375 1 39 719 18 18 100 110 133 4 133 4 M12 M12 R R 15 18 M20 x2 5 M20 x2 5 34 40 36 36 90 99 7O 74 28 34 HH4C HOSCH 4 G D2
32. N DAFP L CAR LIE T AMOS RET ee aie a f HE LU 2 2 1 if 8 2 Okg
33. INR ERY 1 6 2 6 N Ws N NV NN NN AN INR 09 O OD WW WW i HO22M5 12
34. sy dd bd 12 12 13 12 13 3 4
35. C OO40 OO5Omm HO1MA JIS ANSI ISO A 3 710005 A 170 610 710 005 A r 4 4 2 0 010 A A A Ke a e es Pe lal gs pS _ HO1MA HO022M H024M 2 5 3 O HO1MA4 5 HO22M5 HO24M5 HO1MA6 12 8 6
36. d dd d lt D lt d d gt DZ d XO 75 XO 75 D D H GEE E
37. 10 3 3 ti 34 13 35 o te ee ee 13 351 14 B52 14 36 14 3 6 1 15 36 2 15 3 6 3 es ss sses ee ee ee 16 364 16 A 17 41 17 42 17 43 18 AA 19 5 ee ee ee ee 22 6 23 6 1 23 62 PJD ceso e 28 63 BEEM e e e e a 28 64 29 65 EEE e ee ee ee ee ee ee ee 29 66 ee et ee ee ee ee ee 30 WR SIO K See lage 6 WW im 31 1 HO1MA HO22M HO24M 2
38. HO1MA HO22M HO24M 2 1 2 5 HO22M HO24M 8 10 82 98 52 TO 190 230 2 5 2 5 1 25 2 C
39. O Re 3 Re Re gt bla Y nn HO22M H0 1MA4 lt 12 HO1MA6 24 BET HO24M A zs Re Re 3 ALD RIAL CHES
40. 1 4 6 mm 15 3 6 3 ax So A
41. 2 sees a 11 6D OXT 6D D oD
42. NON THROUGH HOLE POWER CHUCK HO1MA HO22M HO24M INSTRUCTION MANUAL A A IMPORTANT Be sure to read and understand this instruction manual thoroughly before operating this proouct a When ownership of this product is transferred submit this manual to the new owner Hey the 7 SAAT Sl HOWA MACHINERY LTD 1 4 11 4 12 4 2 5 2 1 5 22 ee eee et eee we eh we ee ee 5 23 5 24 5 25 ee ee ee ee 6 25 1 6 252 6 253 7 254 PARE en ee a eR ee Sw 8 255 9 3 9 34 9 32
43. 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 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 Chuck center line for Chuck center line for Sy forming dd forming D Chuck center line for forming d 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 forming D 12 Remarks When machining a bar stock keep in mind that th
44. 3 6 ANSI B1 1 6 ANS A zs
45. OF ANSI B1 1 6 1984 A TANS B1 1 6 1984 ANSI B1 1 6 1984 3 6 4 A SEH 16
46. BH A ax A
47. 0 G 00 0 00 0 00 4 a 4A 4 Ay sy H Bape a bees 1 6 X2 6 8 10 12 61 5 H 3 HO1MA6 12 Beit ASS H01MA8 A6 J HO1MA10 A6 J 20 4 HO1MA10 A8 J H01MA12 A8 J HO1MA6 A5 J HO1MA15 24 SS A NNN N VN i amp ANY 1 om
48. 3 4 5 7452 8601 SARATA O 1900 1 TEL 052 408 1254 FAX 052 409 3766 6 S 1MPa 10 197kgf cm2 lt 1kN 101 97kgf 1N m 0 1019Tkgf m
49. 14 3 6 1 ax So TANSI B11 6 1984
50. INRY HO24M5 12 1 5 2 5 6 8 4 10 12 61 NIi H o 21 5 DENE
51. 6 HO24M X 1O0 12 6 4 30 FOES
52. 8 3 1 1 1 HO1MA HO22M HO24M 3 HO1MA A _ REEL JIS ESSERE 5 6 8 11 15 4 5 6 8 10 12 15 18 21 24 3 HO22M __ Jis 5 6 8 5 6 8 10 12 2 HO24M A L J igs animes 5 6 8 5 6 8 10 12 1 2
53. 28 36 mval wal S S r AIS Enmoonr AJIL UA 1 5 3 HO1MA ISA i 8 11 8 11 11 15 11 15 gt 331 457 530 610 280 225 280 280 380 280 196 869 139 719 196 869 1 96 869 285 775 1 96 869 20 20 24 20 140 OM R R 31 33 CIIIOInim olol M3OX3 5 C 65 x 55 WM US 35 O 4 G 2 DS HO22M
54. 10 30 45 117 5 29 4 10 J1 H022M Specifications Dimensions Series number Series number Specifications Serration pitch Jaw movement Dia Plunger stroke Cylinder stroke Recommended outside chucking diameter for standard soft jaws Max Speed Max input force Clamping force at Max input force Total jaw force Moment of inertia J Note1 Weight with standard soft jaws Matching cylinder Series number HH4C 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 Max speed of a rotating cylinder is lower than that a chuck observe that of a rotating cylinder 26 H024M Specifications Series number Specifications Serration pitch Jaw movement Dia Plunger stroke Cylinder stroke Recommended outside chucking diameter for standard soft jaws Max Speed Max input force kN Clamping force at Max input force Total jaw force NN Moment of inertia J Note1 kg m Weight with standard soft jaws kg Matching cylinder Series number HH
55. Hex socket head bolt Hex socket head bolt Hex socket head bolt Hex socket head bolt Screw Set screw Set screw Grease nipple 1 This is not installed on the 6 inch type 2 Three are used for the 6 inch 8 inch and 10 inch types Six are used for the 12 inch type w wo Nololololo Ew 19 HO1MA6 12 Type A Spindle Mounting Parts Name Chuck body Pilot plate Plug Wedge plunger Draw screw 1 Draw stud or Draw tube Round nut Spring O00N OP PM Steel ball Master jaw Dust proofer HO1MAS AG J HO1MA10 A6 J Soft too jaw 20 8 HO1MA10 A8 J pJ H01MA12 A8 J Jaw nut Hex socket head bolt Hex socket head bolt Hex socket head bolt Hex socket head bolt Screw Set screw Set screw w slo Nw oo wowow N5lol jajajajaja Grease nipple 1 The 6 inch uses a draw stud The other sizes are all draw tubes 2 This is not installed on the 6 inch type HO1MA15 24 Type A Spindle Mounting Parts Name Chuck body Pilot plate Plug Wedge plunger Draw screw Draw stud Round nut Spring Steel ball Master jaw Soft top jaw Jaw nut Hex socket head bolt Hex socket head bolt Hex socket head bolt Hex socket head bolt Screw Set screw Grease nip
56. 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 configuration 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 o
57. 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 If the plunger stroke of a chuck is shorter than that of a cylinder the latter must be adjusted to the former The cylinders of model marked are required limiting of stroke 3 When the Max speed of a rotating cylinder is lower than that a chuck observe that of a rotating cylinder Serr Pitch 1 5 Serr Pitch 23 HO01MA Type A Spindle Mounting Specifications Dimensions Series number Series number Specifications JIS A Spindle No Serration pitch A 210 180 180 106 375 106 375 139 719 18 18 100 133 4 133 4 M12 M12 15 18 M20 x2 5 34 36 90 70 28 28 JIS A Spindle No Jaw movement Dia Plunger stroke Cylinder stroke Recommended outside chucking diameter for standard soft jaws Max Speed Max input force Clamping force at Max input force Total jaw force ziz m JAS Tonm Moment of inertia J Note1 Weight with standard soft jaws Matching cylinder Series number HH4C Max pressure to operate chuck Series number HO5CH Max pressure to operate chuck Note 1
58. 4 Maintenance 4 1 Lubrication 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 the following guidelines for lubrication WARNING WARNING WARNING Lubrication Points Points Recommended Time of Lubrication Lubricant Grease nipples on Once every 8 hours a of chuck MOLIKOTE ER but where coolant is constantly GREASE used 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 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 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 piece
59. 4 1 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
60. 18 21 24 Runout the outer periphery T I R 0 020 0 030 0 040 Runout the end face T I R 0 020 0 030 0 040 For the torque to be applied to the chuck installing bolt refer to Table 5 Table 5 Tightening torque _ N m 4A WARNING Fasten the chuck installing bolts with recommended tightening torque If the torque is largely different from the recommended value lower or 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 the hex key spanner provided long wrench for HO1MA6 12 and type A spindle mounting HO1MA8 12 chucks adjust until the outer periphery of the master jaws and that of the chuck body are flush 8 The operation is completed when the top jaws and the plug top jaws and pilot plate for HO1MA4 5 HO22M5 and H024M5 chucks have been installed 9 If you installed the chuck by screwing the eyebolt into the chuck periphery remove the bolt AA WARNING Be sure remove the eyebolt when the installation is carried out with using an eyebolt 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 abnor
61. 60 60 HO24M10 HO22M6 HO24M8 R 50 50 40 40 SZ lt x 59 HO22M5 gr HO24M6 20 20 f HO24MS 10 10 0 1000 2000 3000 4000 0 1000 2000 3000 oe r min Omg r min ci 6 3 FEE J8 J7 _ J Ji JF fa y TEA H Ji J9 J12 gelato Oo HO1MAG HO22M HO24M DO ON ON ON 0 28 6 4 6 401 O62 O OOO J1 J4 J2 9 8 401 O62 1 OOO HO1MA 10 1401 O62 2 OOO 6 5 12 1401 O62 3 OOO H1 JHS AA Di CI A EE JH JH25 he m S JH10 xy I x 1 NI i 5 o T 1 i I n JH1 1 JH7I JH JJH6 TB
62. 4 L4_ISlelglnelieliels 2 24 TAR mm 0 020 0 030 0 040 TLR mm 0 020 0 030 0 040 5 5 ae D HO1MA6 12 HO1MA8 12 6 HO1MA4 5 HO22M5 HO24M5 O
63. 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 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 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 overcome 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 inade
64. damaged resulting in coming 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 M14 M16 M20 M22 Tightening torque N m 12 1 29 4 57 9 101 128 161 251 341 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 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 non through hole power chuck H01MA H022M and H024M are model co
65. stroke of the rotational cylinder and plunger stroke of the chuck must be equal But instead of regulating the cylinder stroke of the rotational cylinder the stroke end can be created by contacting the end edge of the wedge plunger to the front end of the chuck adapter In this case the chuck adapters front end must be the shape as shown in Fig 2 and Tables 1 to 2 5 d 4 i a p p D1 H022M H01MA4 10 H024M Table 1 mm HO01MA Series HO22M HO24M number Max Min C 2 5 Installing Procedure 2 5 1 Before Installation After taking the chuck out of the package box wipe off all anticorrosive oil clinging to it with a cloth permeated with cleaning oil 2 5 2 Installing Chuck Adapter Install the chuck adapter on the spindle end face Then the chuck installing socket C and datum face should be machined in place The clearance of the chuck adapter in relation to the chuck installing socket C should be 0 040 0 050 mm in diameter This work is not necessary when installing the type A spindle mounting chuck HOIMA to the type A lathe spindle end which conforms to JIS ANSI or ISO Fig 3 _ 710 005 A _ 70 010 410 005 A TEF 410 010 A A ses ime
66. 00 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 cm Force 1kN 101 97kof 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 Indicates an imminently hazardous situation which if not avoided DANGER oe will result in death or serious injury These warning massages include the preventive actions those are indispensable to avoid danger 4A 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
67. 1500 2000 2500 Chuck speed r min Dynamic gripping force or H024M12 60 HO24M10 HO24M8 50 Q o 40 SN D H024M6 20 H024M5 m 10 0 1000 2000 3000 Chuck speed r min The following table shows the dimensions of standard soft jaws Chuck Series number Serration Pitch J17 J8__J7 J6 J1 1 R x TEA aL fae Serration Pitch Weight 1pcs kg H01MA6 HO022M H024M nn nn oo 28 6 4 Extra high Standard Soft Jaws The following table shows the dimensions of extra high standard soft jaws J4 J2 ire J9 Pitch J11 J10 Serration Chuck Series number Serration Jaw number 401 062 0 000 401 062 1 000 401 062 2 000 401 062 3 000 H01MA The dimension marked with a differ from those of standard soft jaw 6 5 Standard Hardened Jaws The following table shows the dimensions of standard hardened jaws Type H1 Type H2 JH26 ire x ire it 4 Ha JHz JH7 ne ll Serration Pitch JH JH7 JH
68. 4C Max pressure to operate chuck MEA Series number Max pressure to operate chuck Note 1 The four times of this value is equivalent to GD 2 When the Max speed of a rotating cylinder is observe that of a rotating cylinder MPa lower than that a chuck Dimensions Series number 6 2 Gripping Force The following graph shows the gripping force of the rotating chuck equipped with the standard soft jaws Dynamic gripping force 130 120 H01MA12 100 tf H01MA10 8 HO1MA8 S eb D H01MA6 5 NY H01MA5 E 40 apa HO1MA4 a 20 T 0 1000 2000 3000 4000 5000 Chuck speed r min Dynamic gripping force 100 H022M12 90 H022M10 gt 80 HO22M8 w 70 2 60 gt H022M6 5 50 40 30 H022M5 20 10 0 1000 2000 3000 4000 Chuck speed r min 6 3 Standard Soft Jaws Dynamic gripping force 200 o HO1MA21 H01MA24 150 aah ea HO01MA15 x p HO1MA1 2 5 100 D Q 50 0 500 1000
69. 6 JH4 JH2 4 RR JH19 JH4 JH2 aaaasl JH18 Serration Pitch n JH9 Chuck Series number 29 6 6 Accessories The package box contains the accessories besides the chuck itself HO1MA Hex socket head bolt for mounting the chuck Hex key spanner Long wrench Plug Eyebolt The 12 inch uses six and all other sizes use three HO1MA Type A spindle Mounting lege Hex socket head bolt for mounting the chuck Hex key spanner Long wrench Plug Eyebolt HO1MA Type A spindle Mounting 15 Parts name A8 J A11 J Hex socket head bolt for mounting the chuck Hex key spanner Eyebol H022M ee Hex socket head bolt for mounting the chuck Hex key spanner Eyebolt The 5 inch use three and all other sizes six H024M Pore Hex socket head bolt for mounting the chuck Hex key spanner Eyebolt The 10 inch and 12 inch use six and all other sizes four 30 LIMITED WARRANTY Seller warrants its products to be manufactured in accorda
70. 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 Never put any part of your body inside the spindle cover while the spindle is rotating Otherwise you may be caught in the rotating elements 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 Keep the hydraulic pressure constant while the chuck is gripping the work piece Otherwise the gripped work piece may come off and fly out 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 Securely tighten the bolts with the specified torque Otherwise the bolts may become loose or
71. Chuck Adapter Chuck Adapter Spindle Spindle H01MA H022M H024M 6 2 5 3 Installing Chuck 1 Remove the top jaws and plug before installing the Fig 4 chuck remove top jaws and pilot plate for HO1MA4 JHE 5 H022M5 and H024M5 chucks or remove only top et RE jaws for HO1MA6 12 chucks Jaw Nutt 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 3 Advance the connecting rod 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 spindle mounting chuck and that of the connecting rod will be as shown in Table 3 A CAUTION If the dimension Re is less than that indicated in Table 3 the chuck cannot be installed Table 3 mm 4 HO1MA H01MA Type A spindle Mounting H022M H024M HO01MA HO022M HO024M E i i ES 4 l a Connecting Rod J onnecting Rod Connecting Rod Chuck Adapter Spindle BOO H01MA6 lt 24 HO1MA4 12 Type A Spindle Mounting Chuck H024M 4A WARNING Adjust the screw dept
72. The four times of this value is equivalent to GD 2 If the plunger stroke of a chuck is shorter than that of a cylinder the latter must be adjusted to the former The cylinders of model marked are required limiting of stroke S1 3 When the Max speed of a rotating cylinder is lower than that a chuck S2 observe that of a rotating cylinder S3 W Serr Pitch 1 5 Serr Pitch 3 HO01MA Type A Spindle Mounting Specifications Dimensions Series number Series number Specifications JIS A Spindle No Sandie NE Serration pitch A Jaw movement Dia 280 139 719 196 869 196 869 285 775 196 869 Plunger stroke Cylinder stroke 20 20 24 20 Recommended outside chucking diameter for standard soft jaws Max Speed Max input force 31 33 31 CC TIM OU Nn Clamping force at Max input M30 x 3 5 M30 x 3 5 force Total jaw force 65 65 Moment of inertia J Note1 A 55 55 Weight with standard soft jaws 35 35 Matching cylinder in 0 0 Series number HH4C Max pressure to operate chuck Note 1 The four times of this value is equivalent to GD 2 When the Max speed of a rotating cylinder is lower than that a chuck in 18 observe that of a rotating cylinder
73. ded as follows 3 jaw type H01MA A JIS specified spindle nose No No mark Having a straight socket for installation of chuck Having a JIS A spindle nose socket for installation of chuck The direct mount chuck of A type Spindle nose No 5 6 8 11 or 15 Size No 4 5 6 8 10 12 15 18 21 24 3 jaw Long jaw stroke type H022M A E 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 5 6 8 10 12 2 jaw Long jaw stroke type H024M A is 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 5 6 8 10 12 1 2 Construction and Operation The non through hole power chuck basically consists of a chuck body a wedge plunger and master jaws The wedge plunger and master jaws protrude so as to engage the T slot arranged so as to be at an angle in relation to the rotational center of the chuck body When the wedge plunger is drawn to the rear the master jaws are pulled toward the center and the outside of the work piece is gripped by the top jaws OD chucking When the wedge plunger is pressed forward the master ja
74. e 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 D is given by following formula d diameter of plug dd lt DS 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 D2 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
75. e 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 12 and 13 show examples of top jaws formed to secure a greater work piece gripping length by moving the gripping location of the formed plug from 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 Method for gripping formed plug near the al formed ring on the chuck end face ME fa aie top jaw surface Formed Plug Formed Ring Fig 12 Fig 13 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 b
76. e operator or bystanders 9 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 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 XxX Max input force in Spec table _ 3 2 Installing Top Jaws 1 Select the top jaws in terms of the work piece and Fig 8 install them on the chuck Before doing so however JawNut Top Jaw clean off the fitting portions of the top jaw and master Master Jaw 23 jaw serration as well a
77. ecured 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 Fig 10 When the top jaws are installed they must be machine formed to align flush with the work piece When the work piece is gripped the jaw stroke should be such that there is one fourth of the jaw stroke remaining as measured from the stroke end 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 DO gripping the inside diameter ID with the jaws the remaining portion of the stroke should be on the outside refer to Fig 10 The cylinder pressure when the top jaws are formed should be the same as when the work piece is actually being cut See Fig 11 for the specific steps for forming the top jaws 11 ID gripping GOOD Seer L jaw stroke 1 al 3 ih 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 th
78. ed 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 rod Insufficient top jaws stroke Remove the rotating and retighten Adjust so that top jaws come near the center of the stroke when they grip the work piece cylinder 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 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 s
79. f 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 14 3 6 1 Before Gripping Work piece NOTE Before beginning operations check to 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 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 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 To comply with ANSI B11 6 1984 section 4 3 2
80. h of the connecting rod Re to a proper length If the Re value is greater than that indicated in Table 3 the screw depth of the connecting rod 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 enclosed hex key spanner long wrench for HO1MA6 12 and type A spindle mounting HO1MA8 12 chucks 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 rod until it can be tightened no more 7 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 provided as accessories Install for the periphery and the end face the chuck body do not deviate exceeding the limits indicated in Table 4 Table 4 mm Chuck size dE 4 ST 8 10 12 15
81. ip 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 4A 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 irregular 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 A 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 16
82. mal 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 When a HH4C rotating hydraulic cylinder corresponding to the chuck size indicated in the specifications page 23 to page 27 is used the minimum operating pressure will be equivalent to when 0 5MPa or more is used 8 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 B0905 1992 and the unbalance amount of the chuck periphery is specified as shown in Table 6 International Standards that correspond to JIS BO905 1992 are ISO1940 1 1986 and ISO8821 1989 Table 6 mcksee as e e opis wl alm Max unbalance 1 2 3 4 6 10 15 20 30 3 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 optio
83. nal 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 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 Never use top jaws with serrations having a different pitch from those of the master jaw Since the engagement length of the top serration will be inadequate and the tips of the serrations may break oft when the work piece is gripped This in turn may cause the top jaws and or work piece to be released and may cause severe personal injuries or death to the operator or bystanders Example One should never install a top jaw with a serration pitch of 1 5 mm ona master jaw with a serration pitch of 3 mm Also never install a top jaw with a serration pitch of 3 mm on a master jaw with a serration pitch of 1 5 mm 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 th
84. nce 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 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 20081215 31
85. ng Work piece 15 3 6 3 During Cutting Operations ee 16 3 6 4 End of Operations 16 4 Maintenance ii 17 1 ubriecation ss SS So RC E Er 17 4 2 Disassembly and Cleaning ui 17 4 3 Setting Safe Rotational Speed i 18 AA Parts LISE Soe RE peste 19 5 Troubleshooting cccnnenen henna anne 22 6 Specifications EE 23 6 1 SpPSCHiCAllonS vases neste meds nea stead dead Ried malas 23 6 2 GHPPING FOlCE nanenane 28 6 3 Standard Top JAWS i 28 6 4 Extra high Standard Soft Jaws 29 6 5 Standard Hardened Jaws ti 29 6 6 PROCES SOMES TLR 29 EMITED WARRANT Y uci 31 Introduction 1 This instruction manual describes the non through hole power chuck HO1MA H022M and H024M 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 19
86. onditions may cause the work piece to fly off and may in turn cause serious injury or 13 3 5 1 Permissible Cylinder Force The permissible cylinder force indicated in the specification table or catalogue is the maximum cylinder 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 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 A WARNING The use of excessive cylinder 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 A WARNING 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
87. ple 20 HO22M5 12 Parts Name Chuck body Pilot plate Plug Wedge plunger Draw stud Set screw Draw screw Round nut 00 NO 01 amp Go Ro Spring Steel ball Master jaw Dust proofer Soft top jaw Jaw nut Hex socket head bolt Hex socket head bolt Hex socket head bolt Hex socket head bolt Set screw Screw G G OD Od G G Go Go Go a a Se Grease nipple HO24M5 12 Parts Name Chuck body Pilot plate Plug Wedge plunger Draw stud Set screw Draw screw Round nut Spring Steel ball NI Master jaw 1 Dust proofer Soft top jaw Jaw nut Hex socket head bolt AIAINININ Hex socket head bolt N Aas o Hex socket head bolt Hex socket head bolt Set screw Screw NN mo Grease nipple 1 This is not installed on the 5 inch type 2 The 5 inch 6 inch and 8 inch uses four and the 10 inch and 12 inch use six 1 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 Work piece slips Poor accuracy Damag
88. quate 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 18 4 4 Parts List HO01MA4 5 Parts Name Chuck body Pilot plate Wedge plunger Draw screw Draw stud Spring Steel ball Master jaw Soft top jaw Jaw nut Screw Hex socket head bolt 00 Ni Od O01 Go RO gt Lge Hex socket head bolt 3 7 Ne Hex socket head bolt H01MA4 T Set screw BrT Grease nipple Set screw w el G or Go Go wlw EE sM saM HO1MA6 12 Parts Name Chuck body Pilot plate Plug Wedge plunger Draw screw Draw tube Round nut Spring Steel ball Master jaw 00 NO RPM Dust proofer Soft top jaw Jaw nut
89. rque N m Use exact torque for the installing bolts If less torque is used than specified in Table 7 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 may lead to severe personal injury or death to the operator and or bystanders Fig 9 4 Two bolts are used for one top jaw As long as the installation 2mm or less bolts provided for the standard soft jaws or standard hardened jaws are 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 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 s
90. rs 2 3 Preparations for Installation Except the direct mount chuck of 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 rod 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 rod The user must fabricate a connecting rod in accordance with the lathe used and the chuck which has been selected It is extremely important that connecting rod be sufficient to assure rigidity and strength Insufficient strength or rigidity will cause breakage of the connecting rod 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 HOIMA 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 former 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 Even when using the HOIMA H022M and H024M chucks the cylinder
91. s 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 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 wedge plunger thus preventing smooth operation Disassembly and cleaning 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 17 4 3 Setting Safe Rotational Speed ANSI B11 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 gripping 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
92. s those of the jaw nuts with a ot compressed air blast STO What dirt or foreign matter remains can be loosened aly with cleaning oil brushed vigorously then blown off 1 by compressed air NOTE 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 top 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 1 When this O dimension is taken for maximum the peripheral surfaces of the master jaws and jaw nuts virtually coincide AA 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 7 10 Table 7 Tightening to
93. ufficiently 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 jaws 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 22 Reduce the force to a gripping reasonable amount to assure proper machining 6 Specifications 6 1 Specifications H01MA Specifications Dimensions Series number Series number Specifications Serration pitch Jaw movement Dia Plunger stroke Cylinder stroke Recommended outside chucking diameter for standard soft jaws ciIrIlolnim olo Max Speed Max input force A Clamping force at Max input force Total jaw force rc Moment of inertia J Note1 Weight with standard soft jaws Matching cylinder Series number
94. ut 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 1145 1000 Berlin 30 West Germany NOTE Howa is happy to send you a copy of the English version of the above standard upon request The maximum applicable chuck speed as indicated in the specification table or catalogue shows a guideline and is defined as the speed obtained under the following conditions The standard soft jaws are so installed that their peripheral surface coincides with that of the master jaws The gripping force measuring instrument is held at the middle of the full jaw stroke with the permissible cylinder force and the standard soft jaws The gripping force becomes one third of the gripping force in the stationary state 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 c
95. ws will move outward and the inside of the work piece is gripped by the top jaws ID chucking NOTE Fig 1 Master Jaw T Jaw Nut a il Top Jaw reel lt REAR Q HtA IFRONT ON N Draw Screw e co Round Nut Pilot Plate Chuck Bod Wedge Plunger 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 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 particula
96. 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 chips or tool fragments will fly out causing severe injury or death to the operator and or bystanders 3 6 2 When Gripping Work piece NOTE 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 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 15 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 sl
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