1、ASME B5.8-2001Revision of ASA B5.8-1972(R1994)CHUCKS ANDCHUCK JAWSAN AMERICAN NATIONAL STANDARDIntentionally left blank AN AMERICAN NATIONAL STANDARDCHUCKS ANDCHUCK JAWSASME B5.8-2001Revision of ASA B5.8-1972(R1994)p. 1 04-17-01 10:23:24 Unit: UCP Textfile: B5P8$cp p. 1Date of Issuance: May 25, 2001
2、The 2001 edition of this Standard is being revised with an automatic addendasubscription service. The use of an addenda allows revision made in responseto public review comments or committee actions to be published asnecessary. The next edition of this Standard is scheduled for publication in2006.AS
3、ME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria forAmerican National Standards. The Standards Committee that approved the code or standardwas balanced to assure that individuals fro
4、m competent and concerned interests have had anopportunity to participate. The proposed code or standard was made available for public reviewand comment that provides an opportunity for additional public input from industry, academia,regulatory agencies, and the public-at-large.ASME does not “approv
5、e,” “rate,” or “endorse” any item, construction, proprietary device,or activity.ASME does not take any position with respect to the validity of any patent rights asserted inconnection with any items mentioned in this document, and does not undertake to insure anyoneutilizing a standard against liabi
6、lity for infringement of any applicable letters patent, nor assumeany such liability. Users of a code or standard are expressly advised that determination of thevalidity of any such patent rights, and the risk of infringement of such rights, is entirely theirown responsibility.Participation by feder
7、al agency representative(s) or person(s) affiliated with industry is not tobe interpreted as government or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued inaccordance with the established ASME procedures and policies,
8、which precludes the issuanceof interpretations by individuals.No part of this document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue, New York, NY 10016-
9、5990Copyright 2001 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll Rights ReservedPrinted in U.S.A.p. 3 04-17-01 10:23:47 Unit: UFW Textfile: B5P8$FW p. 3FOREWORDThe original edition of this Standard, known as ASA B5.8-1936, was developed byTechnical Committee 11 on Chucks and Chuck Jaws of Sectio
10、nal Committee B5 on thestandardization of small tools and machine tool elements.Sectional Committee B5 was organized in September of 1922 under the procedure ofthe American Standards Association and is sponsored by the National Machine Tool BuildersAssociation, the Society of Automotive Engineers, M
11、etal Cutting Tool Institute, and TheAmerican Society of Mechanical Engineers.Technical Committee 11 was organized in New York on December 4, 1928. TechnicalCommittee 4 on spindle noses was organized on December 5, 1928. These two committeesworked in close cooperation with each other and with manufac
12、turers and users of enginelathes, turret lathes, and automatic lathes in developing standards for spindle noses andchucks.A joint preliminary report was issued by these two committees in April, 1930, knownas The April 1930 Report of Technical Committees 4 and 11 on Proposed StandardSpindle Noses and
13、 Chucks, and was distributed in industry for criticism and comment inMay, 1930.As a result of suggestions and criticisms and the addition of considerable material offeredby industry, the two committees in May, 1935, released designs for chucks which werelater incorporated in American Standard Chucks
14、 and Chuck Jaws, (ASA B5.8-1936). Thecompanion spindle noses were at that time incorporated in American Standard for LatheSpindle Noses (ASA B5.9-1936).In 1943, the Engineering Committee on Standardization of Engine and Tool Room Lathes,appointed by the National Machine Tool Builders Association, wa
15、s formed for furtherstudy on the standardization of various elements including spindle noses. As a result of itsstudy, this committee recommended that the Type D and Type L spindle noses be establishedas alternate American Standards for engine lathes. These recommendations were approvedby the Engine
16、 Lathe Group of the National Machine Tool Builders Association in October,1944, and were approved by Sectional Committee B5 in November, 1944.At the November, 1944 meeting of Sectional Committee B5, it was agreed that AmericanStandard Lathe Spindle Noses (ASA B5.9-1936) should be revised to include
17、five sizes ofthe Type L spindle noses; the two smaller sizes of Types A, B, and D spindles, namely,the 2 in. and 3 in.; and one larger size, namely, the 28 in. This revision was completedin May, 1947, for presentation to the Sectional Committee. Following the approval by theSectional Committee it wa
18、s later approved by the four sponsors and the American StandardsAssociation, and was designated on March 30, 1948, as American Standard Spindle Nosesfor Tool Room Lathes, Engine Lathes, Turret Lathes, and Automatic Lathes (ASA B5.9-1948).Further revisions of an editorial nature were approved by Sect
19、ional Committee B5 in1953 resulting in the latest revision now designated ASA B5.9-1954.At its meeting in December, 1948, Sectional Committee B5 voted to revise AmericanStandard Chucks and Chuck Jaws (ASA B5.8-1936) to include specifications for chucksfor the Type L spindle nose, and voted to make s
20、uch changes as present-day practiceiiip. 4 04-17-01 10:23:47 Unit: UFW Textfile: B5P8$FW p. 4indicates are desirable so that the revision will be a proper companion standard for theone on spindle noses.Technical Committee 11 was reorganized for this purpose in the early part of 1949. Thisrevision, i
21、n printers proof form, dated February, 1952 was presented to the members ofSectional Committee for vote on approval by letter ballot.Following approval of the sectional committee and sponsors, this revision was presentedto the American Standards Association for approval and designation as an America
22、n Standardon January 27, 1954.On October 23, 1963, meetings of the Technical Committee 11 were begun to reviewand discuss the general updating of the American Standard Chucks and Chuck Jaws Standard(ASA B5.8-1954). Final acceptance was given by this Committee in February, 1970 andit was forwarded to
23、 the members of Standards Committee B5 for their approval.Following approval of the B5 Standards Committee, the Revision was submitted to theAmerican National Standards Institute and approved on April 14, 1972 as ANSI B5.8-1972.After a number of dormant years, Technical Committee 11 was restarted in
24、 1996. Duringa period of about a year, the re-energized committee reviewed the 1972 version of thisStandard and updated it to reflect present conditions and usage. This Standard is intendedto be used for the existing inch-based chucks.This Standard brings forth American Standard inch dimensions for
25、chucks which continueto be used.Suggestions for the improvement of this Standard are welcome. They should be addressedto The American Society of Mechanical Engineers, Secretary, B5 Main Committee, ThreePark Avenue, New York, NY 10016-5990.This Standard was approved as an American National Standard o
26、n January 3, 2001.ivp. 5 04-17-01 10:24:09 Unit: UCR Textfile: B5P8$cr p. 5ASME STANDARDS COMMITTEE B5Machine Tools, Components, Elements, Performance,and Equipment(The following is the roster of the Committee at the time of approval of this Standard.)OFFICERSC. T. Wax, ChairJ. R. Bird, SecretaryCOM
27、MITTEE PERSONNELJ. R. Bird, The American Society of Mechanical EngineersA. M. Bratkovich, The Association for Manufacturing TechnologyP. DeFeo, Northfield Precision Instrument, Corp.D. M. King, Parlec, Inc.D. L. Lewis, Kennametal, Inc.C. D. Lovett, National Institute of Standards and TechnologyG. R.
28、 Rawlinson, Rawlinson one with a body 12in. in diameter shall be known as a 12 in. chuck.Name of Actual OutsideChuck, in. Diameter of Body6 6.508 8.2510 1012 1215 1518 1821 2124 2428 2832 3236 3613 SPECIFICATIONS OF CLASS I CHUCKSClass I chucks are medium-duty, wrench-operatedchucks with master jaws
29、 of the tongue-and-groove typefor use on engine lathes and for other applicationswhere the service is not severe. These chucks areprovided with master jaws of the dimensions given inTable 1. The tops of the master jaws project above theface of the chucks in all sizes. The mating dimensions oftop jaw
30、s for these chucks are given in Table 2. Standardthree-step reversible top jaws for these chucks may ormay not be made so that with the long gripping surfaceof the top jaws inwardly mounted, the top jaws andthe master jaws will both grip a piece of bar stockinserted through the chuck. When the three
31、-step jawsare reversed, the inner ends of top jaws may or maynot have gripping surfaces. If they do, the ends of themaster jaws project inward beyond the top jaws toprovide a definite shoulder on the master jaw forlocating any piece that may be gripped by the innerstep of the top jaws. These chucks
32、may have two ormore jaws and may be of the independent, self-centeringor combination type.4 SPECIFICATIONS OF CLASS II CHUCKSClass II chucks are heavy-duty wrench-operated ordraw-bar operated chucks with master jaws of thetongue-and-groove type for use on turret lathes andfor other applications wher
33、e the service is severe. Thesechucks are of stronger construction than Class I chucks.The wrench-operated chucks may be either hand oper-ated or power operated. The draw-bar operated chucksare actuated by an air cylinder, a hydraulic cylinder,or other means. These chucks may have two or morejaws, an
34、d may be of the independent, self-centering,or combination type.5 BODY DIMENSION AND MASTER JAWDIMENSIONS OF CLASS II WRENCH-OPERATED CHUCKSTable 3 gives body dimensions and master jawdimensions of Class II wrench-operated chucks. Thetops of the master jaws of chucks project above theface of chuck b
35、odies with the option of 12 in. andp. 2 08-03-01 15:24:53 Unit: U1 Textfile: B5P8$U1 p. 2CHUCKS AND CHUCK JAWSASME B5.8-2001MJ-1MJ-7MJ-17MJ-17MJ-17MJ-17MJ-17MJ-17MJ-17MJ-1MJ-7MJ-3MJ-4MJ-7MJ-3MJ-51.26 in.For eye bolt 0.500 in. 13 UNC2B in chucks 12 in. and 15 in.; 0.750 in. 10 UNC2B in chucks 18 in.
36、and larger Note (1)Master Jaw for 21 in. to 36 in. ChucksMaster Jaw for 18 in. ChuckB-1B-4MJ-4MJ-2MJ-9MJ-13MJ-18MJ-1MJ-5MJ-3MJ-8MJ-11MJ-12 MJ-19MJ-17MJ-4MJ-5TABLE1ILLUSTRATION2p. 3 08-03-01 15:24:53 Unit: U1 Textfile: B5P8$U1 p. 3CHUCKS AND CHUCK JAWS ASME B5.8-2001TABLE1CLASSI,TONGUEANDGROOVE,MEDIU
37、M-DUTYWRENCH-OPERATEDCHUCKSCenterCrossScrewtoSlotCenterCenterDepthCentertotoCrosstoNum-Num-WidthofScrewCenterCrossSlotFullCenterberberWidthofofHeightofCrossNom-CenterLengthHoles,LineSlottoTappedDepthofofofCrossSlot,Tongue,Tongue,Slot,inalHoleofMJ-2ofEdge,CrossHoleofHoles,CrossToppedMJ-5MJ-8MJ-9MJ-11
38、Size of(Min.),Jaw,NoteBite,MJ-4Slot,(UNC-3B)Thread,MJ-17Slots,Holes,ChuckB-4MJ-1(2)MJ-3Note(2)Max.Min.MJ-7Max.Min.Max.Min.Max.Min.MJ-12MJ-13Note(2)MJ-18MJ-1961.382.561.5001.1250.5000.5000.4995.0.3120.3100.140.120.180.160.375160.76.1281.503.061.7501.3750.6250.5000.4995.0.3120.3100.140.120.180.160.375
39、160.76.12102.123.622.1251.5620.6880.7500.7495.0.5000.4980.140.120.180.160.500130.88.12123.004.262.5001.8750.8750.7500.7495.0.5000.4980.140.120.180.160.500131.001.25013153.255.003.0002.2501.1250.7500.7495.0.5000.4980.140.120.300.280.625111.121.50013184.256.503.0002.2501.1250.7500.74951.5000.5000.4980
40、.140.120.300.280.750101.501.50024214.258.003.0002.2501.1250.7500.74951.5000.5000.4980.140.120.300.280.750101.501.50035245.008.003.0002.2501.1250.7500.74951.5000.5000.4980.140.120.300.280.750101.501.50035286.008.003.0002.2501.1250.7500.74951.5000.5000.4980.140.120.300.280.750101.501.50035326.008.003.
41、0002.2501.1250.7500.74951.5000.5000.4980.140.120.300.280.750101.501.50035366.008.003.0002.2501.1250.7500.74951.5000.5000.4980.140.120.300.280.750101.501.50035GENERALNOTES:(a)Alldimensionsareininches.(b)Forreference,seeTable1illustrationbeginningonpage2.NOTES:(1)Numberandlocationofholesshouldaccommod
42、atebalanceofchuck.(2)Holeslocatedwithin0.006in.oftrueposition.3p. 4 08-03-01 15:24:53 Unit: U1 Textfile: B5P8$0001 p. 4CHUCKS AND CHUCK JAWSASME B5.8-2001TJ-4TJ-5TJ-11TJ-9TJ-8TJ-12TJ-16TJ-2TABLE 2 THREE-STEP REVERSIBLE TOP JAWS FOR CLASS ICHUCKS WITH TONGUE AND GROOVE JAWSCenter to ScrewCenter Cente
43、r to Drill CBoreWidth of Width of Depth of Height ofScrew Edge of Size forCross Key, Tongue Slot, Tongue Slot, Cross Key,Nominal Holes, Key, for ScrewTJ-5 TJ-8 TJ-9 TJ-11Size of TJ-2 TJ-4 Screws, Head,Chuck Note (1) Note (1) Max. Min. Max. Min. Max. Min. Max. Min. TJ-12 TJ-166 1.500 0.500 0.499 0.49
44、8 0.315 0.313 0.17 0.15 0.12 0.10 0.406 0.6098 1.750 0.625 0.499 0.498 0.315 0.313 0.17 0.15 0.12 0.10 0.406 0.60910 2.125 0.688 0.749 0.748 0.503 0.501 0.17 0.15 0.12 0.10 0.531 0.79712 2.500 0.875 0.749 0.748 0.503 0.501 0.17 0.15 0.12 0.10 0.531 0.79715 3.000 1.125 0.749 0.748 0.503 0.501 0.17 0.
45、15 0.25 0.23 0.656 1.00018 to 36 3.000 1.125 0.749 0.748 0.503 0.501 0.17 0.15 0.25 0.23 0.781 1.188GENERAL NOTES:(a) All dimensions are in inches.(b) See Table 1 for Class I, Tongue and Groove, Medium-Duty, Wrench-Operated Chucks.NOTE:(1) Holes located within 0.006 in. of true position.larger to be
46、 below the face of body. Mating dimensionsof top jaws for these chucks are given in Table 6.Standard three-step reversible top jaws for these chucksmay or may not be made so that with the long grippingsurface of the top jaws inwardly mounted, the top jawsand the master jaws will both grip a piece of
47、 bar stockinserted through the chuck. When the three-step jawsare reversed, the inner ends of the master jaws projectinward beyond the top jaws to provide a definiteshoulder on the master jaws for locating any piece thatmay be gripped by the inner step of the top jaws.6 BODY DIMENSIONS AND MASTER JA
48、WDIMENSIONS OF CLASS II DRAW-BAROPERATED CHUCKSTable 4 gives the body dimensions and master jawdimensions of Class II draw-bar operated chucks. Thetops of the master jaws are above the face of the4chuck bodies for all sizes. Mating dimensions of topjaws for these chucks are given in Table 5.7 CLASS
49、I AND CLASS II COMPARISONThe tongues and grooves of the master jaws of ClassI and Class II chucks of the same size are identical.However, the tapped holes MJ-12 of Class II chucksare larger than the corresponding tapped holes of ClassI chucks of sizes 6 in. to 15 in.8 SPECIFICATIONS OF CLASS III CHUCKSClass III chucks are heavy-duty wrench-operated ordraw-bar operated chucks with master jaws of thep. 5 08-03-01 15:24:53 Unit: U1 Textfile: B5P8$0001 p. 5CHUCKS AND CHUCK JAWS ASME B5.8-2001serrated type for use on t
