豊和工業株式会社
Contents
1.2. Bo 528
3. SX CO 3 5
4. I TRS N L 10 HO14M 1 4 HO14M 11 d OR 8 d H7 1 6a
5. OES 1 Table of contents Introduction Safety Information Safety Precautions 1 Construction and Operation
6. A it OF D X
7. REODEDIC RR DK Ia ab gt ig OF
8. 6 8 3 1 1 1 HO14M 2 HO14M A L is 5 6 8 6 8 10 1 2 HO14M 2
9. gt ig 4 3 1OOO ao Z 43 1
10. 1 14 gt ig WEDE gt ig OF
11. A HOS 2 1 2 2 1 if 8 2 Okg
12. 2 1 or 2 INR 1 6 2 8 4 COID NI l 2 6 8 1 2 4 1 1 5 DENE DHOL OD
13. 3 2
14. 244 m CL 6 1 HH4C 05MPa 2 4 5
15. SAO Ce Oe GN es gt ig HEROFBYUYS D 3 2 O 8
16. eg SES
17. JL 6 8 2 2 C 6 4 4 2 3 A
18. BBEL lt SWICE SEDI LTELSCED A nes ser S v ez A DEAS
19. 11 3 6 0 ANSI B1 1 6 ANS De ee ae o
20. 0 5 1mm 4 3 2 8 15 44 TANS B1 1 6 1984 section 7 1 9
21. A SEH ANSI B1 1 6 1984 section 4 3 2 12 3 6 2 A E TANS B11 6
22. VDI No31O6 VDI No 3106 VDI No 31O6 62RD
23. ELLE 2 4 2 4 1 24 2 C C OO40OCOO5Omm SJ 2 0005 A A 4 10 010 LUM o S 2 4 3 O
24. 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
25. BL jE 18 6 6 1 e 95 133 4 M12 18 M2OX2 5 40 A B2 C D E F G H J J1 K 38 39 28 74 HH4C 4 GD s aie g
26. O 6 RGO 1 WL FEES S mm T mm H014M6 H014M8 10 Az zs R 6 S lt 7 7
27. 2 S5 3 1 5 Ay E lt a HO14M 11 S1 10 3 4
28. JIS BO905 1992 4mm s F JIS BO905 1992 ISO1940 1 1986 SO8821 1989 5 1 7 3 1 ae
29. Q X W Nm 2 ma al y 5 8 1 ald 4 1 BUSS EP RL JJI Hoes SN COMold SAI LENEMUCCIESLN
30. OF ANSI B1 1 6 1984 A 13 TANS B1 1 6 1984 ANSI B1 1 6 1984 3 6 4 Bete
31. 5 35 1 Pan
32. 15 4 4 Setting Safe Rotational Speed oo 16 45 Pants 17 5 Troubleshooting ieee 18 6 Specifications NAS 19 6 1 SpeCiHiGablOns vind mdse cd leid edccotasd i ids eneeeennn nena 19 6 2 Gripping PONCE satis ENE 20 6 3 Standard Top JAWS AA 20 6 4 Accessories ieee 20 EMIIEDWARRANITYERARMRQRNNK COO 21 Introduction This instruction manual describes the draw down power chuck HO014M standard model 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 N a 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
33. eee nae E ee 16 45 1 2 or 4 Oo
34. gt ZTT omy HO14M 8 10 Z21 Z1 HO14M6 19 6 2 HO14M10 35 30 HO14M8 25 x m 20 a HO14M6 g 15 10 5 0 500 000 T500 2000 2500 DA r min 6 3 REM BEF MOUS Raclomvags C1 C2 TU 3 OO fase seal ITI a J J6 J1 3 a J1 11 JG J1 3 A g L i Ri 4 ry TA aa Lu Lea g3 5 i vo as J8 LH i J11 J9 J12 8 J10 J7 6 4 20 E
35. 4 4 1 ETE 8 1 EP 4 1 EP 100 O005 1 1 3 AIG TEL 08 3287 1155 FAX 03 3287 8460 4 2 2 KO
36. 4 1 1 Model CedmdGLOOTT 7 oo 4 1 2 Construction and Operation 4 2 instalation EE SEs 4 2 1 UNPACKING NANO 4 22 AcCEeSSONES CL SE 4 2 3 Preparations for Installation i 5 2 4 Installation Procedure 5 2 4 1 Before Installation 5 2 4 2 Installing Chuck Adapter 5 2 4 3 Installing Chuck 5 2 4 4 Inspection i 7 6 BaIBG ee 7 3 Precautions for Use SA 8 3 1 Selecting IODMBWSINELNODNNN 8 3 2 Installing TOP Jaws ii 8 3 3 Forming Top Jaws LA 10 3 4 Installing Stopper 11 3 5 Setting Working Conditions 11 3 5 1 Permissible Cylinder Force ens 11 3 6 Precautions for Operation 12 3 6 1 Before Gripping Work piece 12 3 6 2 When Gripping Work piece 13 3 6 3 During Cutting Operations ee 13 3 6 4 End of Operations 14 4 Maintenance ennen e 14 4 14 Lubrication AE 14 4 2 Lubricating point and procedure 14 4 3 Disassembly and Cleaning eerie 15 4 3 1 Adjusting position of set Screw 15 4 3 2 Location of set ScreW
37. fees ae 3 6 1 agi TE TANSI B11 6 1984 4 A a
38. x gt OE 30 48 3 ZTT H014M8 10 Z2 Z1 1 H014M6 19 6 2 Gripping Force The following graph shows the gripping force of the rotating chuck equipped with the standard soft jaws 6 3 Standard Soft Jaws Gripping force KN Dynamic gripping force H014M10 H014M8 H014M6 500 1000 1500 2000 2500 Chuck speed rmin The following table shows the dimensions of standard soft jaws C1 Type C2 Type ro ER RNN Na ir EE J3 J3 J78 J6 s1 J1 1 11 J6 J1 3 yg ES aa O L vo Us HH i J11 312 Jg Te J8 J10 J7 Chuck Weight Jaw J1 J2 J3 J4 J5 J6 J7 J8 J9 1J101J11 1J12 1J13 1J17 1J18 kg size 1pcs type 6 35 34 70 21 6 43 10 10 23 115 51M14 3 0 5 C1 8 40 44 5 84 29 7 53 26 16 12 20 13 5 M121 3 5 2 45 1 0 C2 10 50 49 5 100 32 7 62 32 18 15 23 115 5 M14 3 5 2 45 1 6 6 4 Accessories The package box contains the accessories besides th
39. 3 8 6 O Re 1 5 As mz Re 1 1 6 J s Ret1 mm 27 5 27 5 36 5 J M16 M20 M24 44 Z5 Re Re 1
40. _ N m 101 128 A SEE 7 9 3 3 39 GOOD NO GOOD 1 4 Up ata Ald 1 4 9 OI E Baa aa 10
41. 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 2 Table 2 Chuck size a lt a a Runout the outer periphery T I R Runout the end face T I R For the torque to be applied to the chuck installing bolt refer to Table 3 Table3 Tightening torque Nm 8 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 provided the hex key spanner and Fig 5 adjust the protrusion of the draw bar from the body edge to the Pmax top jaw installation surface so that it is the Pmax dimension shown in Table 4 LL els Table 4 ge Chucksize 6 8 10 Pmax mm 18 23 8 Install the pilot plate and the top jaws to complete the chuck installation 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
42. 1984 1 4 6 mm 3 6 3 As A
43. 2 eS a TIR _ mm 0 020 0 030 T R mm 0 020 0 030 3 3 N m 6 A SSH 5 D M5 4 Pmax 4 ca Se a e o e te o Pmax mm OQ
44. 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 3 6 3 During Cutting Operations A WARNING NOTE In any of the following cases the tool impact on initial cutting contact may result in an unexpected cutting force in excess of chuck workholding 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 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 ANSI B11 6 1984 prescribes use of a door or a guard to keep the operator from approaching the rotating part s Never operate the rotating cylinder selector valve while the spindle is rotating Otherwise the gripped work
45. 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 3 6 1 Before Gripping Work piece 4A WARNING 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 NOTE ANSI B11 6 1984 prescribes installation of an interlock circuit for preventing ch
46. 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 grippi 18 Reduce the gripping force to a reasonable amount to assure proper machining 6 Specifications 6 1 Specifications Specifications Dimensions Specifications Jaw movement Dia Plunger stroke Cylinder stroke Recommended outside chucking diameter for standard soft jaws Max Speed Max input force kN 18 Clamping force at Max input kN force Total jaw force M20x2 5 40 2 Moment of inertia J Note1 kg m 38 Weight with standard soft jaws kg 39 Matching cylinder 28 71 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
47. his her hand in it Form dd part where the work piece is held keeping the forming 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 forming plug is regripped before the final finish forming Operate the hydraulic or pneumatic circuit to grip the flat surface of the forming plug Press the forming plug against the front of the chuck using the bolt so that the plug will not fall over Use care not to pinch your hand when gripping the formed plug or you will suffer injury to your hand Forming plug for HO14M chuck Fig 11 After finish forming of top jaws grip the work piece in top jaws and check that required jaw stroke and gripping accuracy are obtained 10 3 4 Installing Stopper The draw down chuck cannot grip stably if the work piece is not positioned in the chuck s axial turning direction To position the work piece here the work piece must be pushed to the chuck s work face But in some cases depending on the work piece configuration a stopper has to be equipped 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 s
48. 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 A WARNING 4 3 Disassembly and Cleaning Even with proper lubrication fine chips or scale can enter the chuck to jam the area of the draw bar or draw sleeve 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 AA 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 4 3 1 Adjusting position of set screw The swing angle of draw bar is controlled by set pin and Fig 15 spring forced by set screw In case the set screw is removed for maintenance or so reset it to original position where the top of set screw is 0 5 1mm lower as the outer surface of chuck body Set screw 0 5 1mm outside of chuck bod 4 3 2 Location of set screw Set screws are furnished on the outer surface of chuck body at the same angular position of draw bars Never cael Draw bar misunderstand the screw hole for eyebolt which is pose furnis
49. 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 The H014M chucks cannot grip the inside diameter of the work piece Gripping the inside diameter will cause poor gripping accuracy and insufficient gripping force This in turn may cause the work piece to fly off and may cause severe personal injury or death to the operator or bystanders Use eyebolts when mounting or removing the chuck Use the suspender belt when handing a 6 inch or smaller 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 1 Construction and Operation 1 1 Model Coding The draw down power chuck H014M are model coded as follows 2 jaw type draw down power chuck This chuck cannot grip the inside diame
50. of your body or clothing and get injured 2 4 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 When a HH4C rotating hydraulic cylinder corresponding to the chuck size indicated in the section 6 1 specifications is used the minimum operating pressure will be equivalent to when 0 5MPa or more is used 2 4 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 BO905 1992 are ISO1940 1 1986 and ISO8821 1989 Table 5 LChucksze 6 8 10 3 Precautions For Use 3 1
51. 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 Indicates an imminently 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 Ay DANGER Indicates a potentially hazardous situation which if not avoided WARNING 3 i ae could result in death or serious injury These warning massages include the preventive actions those are indispensable to avoid danger CAUTION Indicates a potentially hazardous situation which if not avoided could result in minor injury or machine damage 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 pre
52. 3 ee ee ee 8 3 1 ne e eee e 8 32 8 3 3 10 34 e oeo t 35 eoo tw ee ee ee 44 B51 11 36 osese eccu aunn 12 3 6 1 12 36 2 13 3 6 3 es ss seses ee ee ee 13 364 14 4 14 41 14 42 14 43 ee ee ee 15 4 3 1 15 43 2 15 44 16 45 17 5 PUBS ee 18 6 19 GI ie e Oe ES i oe a 19 62 WBA ceso ee ee ee ee ee ee ee 20 63 BEEM e e e e ee ee ee ee 20 64 ee ee eeo eee we ee ee 20 eoa 241 1 HO14M 2
53. A DRAW DOWN POWER CHUCK HO1 4M INSTRUCTION MANUAL A IMPORTANT Be sure to read and understand this instruction manual thoroughly before 2Peratng this product Please save this manual When T ownership of this product is transferred submit this manual to the new owner se hI SRT ETIL HOWA MACHINERY LTD 4 PRCURR e I RR ES 4 11 ee ee ee ee en A 12 4 2 RAJAR ES 6 4 21 BR eee ee ee ee ee ee ee ee ee A 22 Mae Ae me 4 23 5 24 eenean 5 2 4 1 5 2 4 2 5 243 5 244 7 245 8 ew Re ee Se Ee 7
54. Selecting Top Jaws The chuck is equipped with a set of standard soft top jaws We are ready to prepare standard soft 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 AA WARNING For all the chuck parts including consumables place an order with Howa Machinery Ltd Howa assumes no responsibility for accidents caused by use of the parts not prepared by Howa Any and all warranties are void unless only Howa genuine parts are used 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 4A WARNING AA WARNING 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 installati
55. cause severe injury or death to the operator or bystanders 16 4 5 Parts List Parts Name Chuck body Parts Name Hex socket head bolt Pilot plate Hex socket head bolt Draw screw Hex socket head bolt O ring Grease nipple Draw sleeve Set screw Back plate Spring Round nut Set pin Spring Collar Steel ball Hex socket head bolt Soft top jaw Key Draw bar Hex socket head bolt 2 N Draw bar Hex socket head bolt Dust seal Set screw Screw OM N aya a a a Sa M Ma Plug 1 6 inch use two parts and other sizes use four parts 2 6 inch and 8 inch use one part and other sizes use two parts 17 ajaj A a op fA 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 Trouble Chuck does not operate Insufficient draw bar stroke Work piece slips Poor accuracy Possible cause Damaged parts on chuck Recommended remedy Disassemble and repair Seizure of sliding contact part Disassemble and repair with oilstone or replace Rotating cylinder inoperative Oversupply of grease Chips heavily accumulated inside Check the piping line If no problem is detected disassemble and clean the cylinder Remove a plug in
56. cautions 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 MA 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 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 gt z ARNING Turn off the power before installing inspecting or servicing the chuck Otherwise you may be caught in the rotating elements x 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 damaged resulting in coming off or flying out of the parts or the work piece w The table below shows the bolt sizes and their tightening torque Tightening torque Bolt size Tightening torque N m ox Lubricate the chuck periodically gt Failure to
57. ctivating the hydraulic or pneumatic circuit In this state the distance Re between the front end face of the chuck adapter and that of the connecting rod will be as shown in Table 1 5 A CAUTION If the dimension Re is less than that indicated in Table 1 the chuck cannot be installed Table1 Chucksize 6 8 10 Re 1 mm 27 5 27 5 36 5 J M16 M20 M24 a Chuck Adapter Adjust the screw depth of the connecting rod Re to a proper length If the Re value is greater than that indicated in Table 1 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 hex key spanner 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 rod until it can be tightened no more 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 resulting in injury
58. e chuck itself Hex socket head bolt for mounting the chuck Hex key spanner Eyebolt 20 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 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 20090529 21
59. eview drawings for the connecting rod 4A WARNING 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 gripped work piece come off and fly out 2 4 Installing Procedure 2 4 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 4 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 Fig 2 0 005 A a 0 010 C Chuck Adapter X Spindle 2 4 3 Installing Chuck 1 Remove the top jaws and pilot plate before installing the chuck 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 or smaller chuck use the suspender belt 3 Advance the connecting rod to the advance end by a
60. g point and process execute with following procedure In each of these models two grease nipples are furnished on the outer surface of chuck body at the same angular position of draw bars Through these nipples supply grease to the sliding surfaces of draw sleeve and draw bars Lubrication should be done when the jaws are opened position Draw bars are at the end of protruding side If lubrication is done when the jaws are closed grease may not reach to the sliding surface equally At all the models of this chuck one place of grease discharge hole is provided for outside of chuck body When the movement of draw sleeve becomes heavy with the oversupply of grease remove a plug and make open and close jaw and discharge surplus grease 14 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 4A 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
61. grease discharge hole and make open and close jaw and discharge surplus Disassemble and clean Loosened joint between rotating cylinder and connecting rod Insufficient top jaws stroke Remove the rotating cylinder and retighten 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 draw bar 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 ipping 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 draw bar or installation end surface of top jaws Remove top jaws clean installation end thoroughly to remove dust Jaws fastening bolts are not tightened securely Fasten top jaw installation bolt at the torque of the regulation Jaws are not formed properly Confirm if the forming plug is in parallel with chuck s end face and if the forming plug is not deformed by gripping force Also check
62. he 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 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 AA 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 11 3 6 Precautions for Operation We
63. hed to 8 inch or bigger size chuck Fig 16 Top jaw draw bar 15 4 4 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 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 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 4A WARNING Do not leave the chuck in the state where its top jaws is not tightened If the spindle is rotated in such a state the jaws 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
64. n 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 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 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 Forming H014M chuck Prepare a formed plug Refer to Fig 11 and Table 8 for the forming plug for the H014M chuck Screw a bolt of the same size to the tap S5 in the center of the forming plug This bolt must be long enough to work as a handle when gripping the forming plug so that the operator does not catch
65. on 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 draw bar due to this peculiar application procedure will shorten service life considerably H gt X Max D B pull in Spec table 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 fitting portions of the top jaw and draw bar with a compressed air blast What dirt or foreign matter remains can be loosened with cleaning oil brushed vigorously then blown off by compressed air NOTE H014M6 When the end surface and the fitting portions of the top jaw and e the draw bar are damaged it is similar to when dirt clings to the fitting portions 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 TARI 8 The top jaws engage with the fitting portions of the draw bar and the arrangement is secured with the bolts Therefore this must not be used in areas other than specified 2 Install
66. piece may come off and fly out 13 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 4A 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 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 Lubrication Points Recommended Time of Lubrication Lubricant Grease nipples on Once every 8 hours outside of chuck MOF TROTE ER but where coolant is constantly GREASE body used once every 4 hours Recommended oil MOLYKOTE EP GREASE supplied from Dow Corning Corporation 4 2 Lubricating point and procedure Lubricatin
67. pping NOTE This manual regards the top jaw side as front and the draw screw side as rear 2 Installation Pilot Plate 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 or smaller 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 4 Accessories for particulars 4 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 r
68. ter of the work piece H014M ET 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 or 10 1 2 Construction and Operation The draw down chuck basically consists of a chuck body draw bars and draw sleeve The draw bars are T amp i Set Screw inserted so as to be at an angle in relation to the Draw Bar rotational center of the chuck body There is a notched ee H groove at the rear of the draw bar and the draw bars Seee iN engage with the draw sleeve at this notched groove Draw Screw en When the draw sleeve is drawn backward the draw gr N Topdaw bars pass through the top jaws with a wedging SEAR mi al FRONT operation The work piece is pulled toward the chuck Bae Pua 6 J edge and gripped The draw bars move not only in the eee ee ENE y direction of the shaft but can rotate within a set angle N N Chuck Body Therefore the top jaws can correspond to the unevenness in the work piece surface However only one of the two draw bars in this chuck rotates In addition this chuck cannot do inside gri
69. the top jaws to the specified position on the draw bar using the number of bolts indicated in Table 6 Table 6 Depth of Length of Thickness of No of bolts draw bar top jaw screw top jaw bolt per top jaws H014M6 H014M8 10 4A WARNING Secure the top jaw with the specified number of bolts Be sure to chouse the bolts with appropriate length If less bolts than shown in Table 6 are used to fix the top jaw the top jaw or bolts may break If the screw in depth S of the bolts fixing the top jaw to the draw bar is too short the bolts or draw bar may break In either case the top jaw or work piece may fly off and in turn may cause severe personal injury or death to the operator or bystanders 3 Tighten the bolts for top jaw installation bolt with the fastening bolt shown in Table 7 Table 7 Tightening torque N m 4 WARNING USe exact torque for fastening bolts A WARNING 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 top jaw or draw bar 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 3 3 Forming Top Jaws Fig 9 NO GOOD L jaw stroke Whe
70. topper designed without our approval A WARNING If the work piece is not positioned in the chuck s axial turning direction a stable grip will not be achieved If cutting is carried out in this state the work piece may fly off and may cause severe personal injury or death to the operator or bystanders 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 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 gripping force during rotation can be determined from the chart in subsection 6 2 Gripping Force The values shown in this chart are obtained under the following conditions Standard soft top jaws are installed 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 t
71. uck 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 4A WARNING severe injury or death to the operator and or bystanders 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 4A WARNING 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 12 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
72. 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 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
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