1、AN AMERICAN NATIONAL STANDARDWrench,CrowfootASME B107.21-2005(Revision of ASME B107.21-1998)Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B107.21-2005(Revision of ASME B107.21-1998)Wrench,Cr
2、owfootAN AMERICAN NATIONAL STANDARDThree Park Avenue New York, NY 10016Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-Date of Issuance: July 29, 2005This Standard will be revised when the Society
3、approves the issuance of a new edition. There willbe no addenda issued to this edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard. Interpretations are published on the ASME website under the Committee Pages athttp:/www.asme.org/codes/ as
4、they are issued.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria for American NationalStandards. The Standards Committee that approved the code or standard was balanced to assure t
5、hat individuals fromcompetent and concerned interests have had an opportunity to participate. The proposed code or standard was madeavailable for public review and comment that provides an opportunity for additional public input from industry, academia,regulatory agencies, and the public-at-large.AS
6、ME does not “approve,” “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 in connection with anyitems mentioned in this document, and does not undertake to insure anyone utilizing a s
7、tandard against liability forinfringement of any applicable letters patent, nor assume any such liability. Users of a code or standard are expresslyadvised that determination of the validity of any such patent rights, and the risk of infringement of such rights, isentirely their own responsibility.P
8、articipation by federal agency representative(s) or person(s) affiliated with industry is not to be interpreted asgovernment or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations of this document issued in accordance with the establishedASME proc
9、edures and policies, which precludes the issuance of 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 Avenu
10、e, New York, NY 10016-5990Copyright 2005 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-CONTENTSForeword ivStandar
11、ds Committee Roster . vCorrespondence With the B107 Committee . vi1 Scope 12 Classification . 13 Normative References . 14 Requirements 15 Test Procedures 26 Designations . 37 Safety Requirements and Limitations of Use 3Figures1 Type I, Class 1 Crowfoot Wrench, Flare Nut, Standard Duty . 42 Type I,
12、Class 2 Crowfoot Wrench, Flare Nut, Heavy Duty . 43 Type II Crowfoot Wrench, Open End . 7Tables1 Type I, Class 1, Flare Nut14in. Square Drive Standard Duty 52 Type I, Class 1, Flare Nut38in. Square Drive Standard Duty 53 Type I, Class 1, Flare Nut12in. Square Drive Standard Duty 64 Type I, Class 2,
13、Flare Nut38in. Square Drive Heavy Duty 64M Type I, Class 2, Flare Nut38in. Square Drive Heavy Duty (Metric) 75 Type II, Class 1, Open End38in. Square Drive Standard Duty . 85M Type II, Class 1, Open End38in. Square Drive Standard Duty (Metric) 96 Type II, Class 1, Open End12in. Square Drive Standard
14、 Duty . 97 Type II, Class 2, Open End38in. Square Drive Heavy Duty . 108 Hexagon Mandrel Dimensions . 118M Hexagon Mandrel Dimensions (Metric) . 11iiiCopyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-,
15、-FOREWORDThe American National Standards Committee B107, Socket Wrenches and Drives, under spon-sorship of The American Society of Mechanical Engineers, was reorganized as an ASME StandardsCommittee and its title was changed to Hand Tools and Accessories. In 1996 its scope wasexpanded to address saf
16、ety considerations.The purposes of this Standard are to define performance and safety requirements specificallyapplicable to crowfoot wrenches and to specify test methods to evaluate performances relatingto the defined requirements.Members of the Hand Tools Institute Wrench Standards Committee have
17、been major contribu-tors to the development of this Standard in their committee work, their knowledge of the products,and their active efforts in the promotion of the adoption of the Standard.This Standard is a revision of ASME B107.21-1998 Wrench, Crowfoot Attachments (Inch Series).Principal change
18、s in this edition of the Standard are the addition of safety requirements, improvedconsistency of classification and dimensioning, and updating to conform to the structure andformat of other B107 standards.The format of this Standard is in accordance with The ASME Codes however, theyshould not conta
19、in proprietary names or information.Requests that are not in this format may be rewritten in the appropriate format by the Committeeprior to being answered, which may inadvertently change the intent of the original request.ASME procedures provide for reconsideration of any interpretation when or if
20、additionalinformation that might affect an interpretation is available. Further, persons aggrieved by aninterpretation may appeal to the cognizant ASME Committee or Subcommittee. ASME does not“approve,” “certify,” “rate,” or “endorse” any item, construction, proprietary device, or activity.Attending
21、 Committee Meetings. The B107 Standards Committee regularly holds meetings,which are open to the public. Persons wishing to attend any meeting should contact the Secretaryof the B107 Standards Committee.viCopyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproducti
22、on or networking permitted without license from IHS-,-,-ASME B107.21-2005WRENCH, CROWFOOT1 SCOPEThis Standard provides performance and safetyrequirements for crowfoot wrenches having a wrenchcomponent of the open end type or flare nut type. Eachtype is designed to receive the external drive end of a
23、socket wrench handle.Inclusion of dimensional data in this Standard is notintended to imply that all of the products describedherein are stock production sizes. Consumers arerequested to consult with manufacturers concerning listsof stock production sizes.2 CLASSIFICATIONType I: Crowfoot wrench, fla
24、re nutClass 1: Standard duty (see Fig. 1)Class 2: Heavy duty (see Fig. 2)Type II: Crowfoot wrench, open endClass 1: Standard dutyClass 2: Heavy duty3 NORMATIVE REFERENCESThe following is a list of publications referenced inthis Standard.ASME B107.4M-1995, Driving and Spindle Ends for Por-table Hand,
25、 Impact, Air, and Electric Tools (PercussionTools Excluded)ASME B107.17M-1997, Gages, Wrench Openings, Ref-erencePublisher: The American Society of Mechancial Engi-neers (ASME), Three Park Avenue, New York, NY10016-5990; Order Department: 22 Law Drive, Box2300, Fairfield, NJ 07007-2300ASTM B 117-97,
26、 Standard Practice for Operating SaltSpray (Fog) ApparatusASTM B 537-70 (1997), Standard Practice for Rating ofElectroplated Panels Subjected to AtmosphericExposureASTM B 571-97, Standard Test Methods for Adhesionof Metallic MaterialsASTM D 968-93, Standard Test Methods for AbrasionResistance of Org
27、anic Coatings by Falling AbrasiveASTM E 18-2000, Standard Test Methods for RockwellHardness and Rockwell Superficial Hardness ofMetallic MaterialsPublisher: American Society for Testing and Materials(ASTM), 100 Barr Harbor Drive, West Conshohocken,PA 19428-29591Guide to Hand Tools Selection, Safety
28、Tips, ProperUse and CarePublisher: Hand Tools Institute (HTI), 25 North Broad-way, Tarrytown, NY 105914 REQUIREMENTSThe illustrations shown herein are descriptive andnot restrictive, and are not intended to preclude themanufacture of wrenches that are otherwise in accor-dance with this Standard.4.1
29、MarkingEach wrench shall be marked in a permanent mannerwith the nominal wrench opening size and the manufac-turers name or trademark of such known character thatthe manufacturer may be readily determined.4.2 MaterialsThe materials used in the manufacture of the wrenchesshall be such as to produce w
30、renches conforming to thisstandard.4.3 HardnessThe wrench shall be heat treated to a hardness of38 HRC to 54 HRC.4.4 Proof TorqueWhen tested as specified, wrenches shall withstandthe proof torque specified in the applicable tables with-out failure or permanent deformation (set), which mightaffect du
31、rability or serviceability of the wrenches.4.5 Wrench Openings4.5.1 Wrench openings shall be such as to ensureacceptance when gaged with gages conforming to ASMEB107.17M.4.5.2 Internal drive end dimensions shall conformto ASME B107.4M, except as noted in para. 4.7. Twosides of the internal drive squ
32、are shall be parallel to thelongitudinal axis of the socket wrench within 3 deg.4.5.3 The wrench opening shall conform to one ofthe following wrenching opening designs:(a) Standard Single or Double Hexagon Configuration.This design consists of a simple geometric single (6Copyright ASME International
33、 Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-ASME B107.21-2005 WRENCH, CROWFOOTpoint) hexagon or a double (12 point) hexagon configu-ration having an across-flats and an across-corner shapefor fit up with hexagon fasteners
34、.(b) Modified Single or Double Hexagon Configuration.This design consists of a geomtric single (6 point) hexa-gon or a double (12 point) hexagon configuration havingan across-flats and a modified or radial relieved acrosscorner shape to ensure noncontact with the corners ofhexagon and 12 point faste
35、ners.(c) Open End Configuration. This design consists of asimple geometric configuration having an across-flatsshape for fit up with hexagon fasteners.4.6 FinishWrenches shall be free from rust, burrs, pitts, nodules,blisters, cracks, or other conditions that may impair ser-viceability, safety, dura
36、bility, or appearance.4.6.1 Surface Finish. Forge flash shall be completelyremoved from the periphery of the drive end and theflare nut and open end portions of the wrench. Anyremaining forge flash on any remaining surfacesbetween the heads shall blend smoothly with adjacentsurfaces. External sharp
37、edges shall be broken to 0.016 in.(0.41 mm) radius minimum, and shall not project morethan 0.016 in. (0.41 mm) from adjacent surfaces.4.6.2 Coatings. The wrench shall be coated with oneof the coatings in accordance with para. 4.6.2(a), (b),or (c).(a) Chrome Plate. The coatings shall be electrodepos-
38、ited metals consisting of nickel followed by chromium.The minimum thickness shall be 0.00015 in. (0.0038 mm)for nickel or iron-nickel, and 0.000003 in. (0.000076 mm)for chromium, unless the wrench passes the test inpara. 5.3.(b) Oxide Coating or Phosphate Coating. Coating shallconsist of a chemicall
39、y produced oxide or phosphate,followed with a coating of rust preventive.(c) Alternate Coatings. Alternative coatings may beused in lieu of nickel-chromium and shall be subjectedto the Alternative Coating Test as specified in para. 5.3.4.7 DesignWrenches shall be designed to allow accessibility tofa
40、steners in confined and restricted areas. The internaldrive surfaces, and the nut and bolt head engaging sur-faces of the flare nut and open end openings, shall befinished in a smooth and well-defined manner. The cor-ners and/or serrations in the openings shall be clearlydefined (not smeared or torn
41、). Type I wrenches shall bechamfered on both sides to provide a lead for the work-ing surfaces. The slotted opening on Type I wrenches,and tips of all open ends on Type II wrenches, shall bechamfered or rounded to eliminate burrs.2When the internal drive end is furnished with a holeor recess for eng
42、agement of the ball/plunger on corres-ponding external drive end and the length of engage-ment of the external drive tang is less than twice thedimension of Dfin Table 7 of ASME B107.4M, the holeor recess shall be central in the corresponding internaldrive.4.7.1 Type I, Flare Nut. Type I wrenches sh
43、all havethe flare nut design (see Figs. 1 and 2). The wrench shallhave an internal drive opening at one end and a wrenchopening to drive hexagonal fasteners. See Tables 1through 4M.The slotted opening may be rotated from the center-line of wrench.4.7.2 Type II, Open End. Type II wrenches shall havet
44、he open end design (see Fig. 3). The wrench shall havean internal drive opening at one end and open wrenchend at the other end. See Tables 5 through 7.5 TEST PROCEDURESThe tests specified herein are inherently hazardousand adequate safeguards for personnel and propertyshall be employed in conducting
45、 these tests.5.1 HardnessHardness shall be tested in accordance with ASTME 18. When surface preparation is necessary, the amountof material removed shall not exceed 0.007 in. (0.18 mm)in the area contaced by the indenter.5.2 Proof Torque TestLoad tests shall be conducted on the sample wrenchesto det
46、ermine conformance with the applicable test loadrequirements specified in para. 4.5.5.2.1 Mandrels for Wrench Openings. The wrenchesshall be tested on mandrels conforming to Table 8 or8M as applicable. Mandrels shall be hardened to a mini-mum of 55 HRC and smoothly finished on the wrenchengaging sur
47、faces.5.2.2 Application of Proof Torque. Wrench openingsshall be gaged prior to testing. The torque shall beapplied with a suitable torque producing machine tomandrels that are fully seated and extend through thewrenching surfaces. Above 50% of peak value, torqueshall be applied at a speed of 15 deg
48、/min to 30 deg/min until peak value is verified, then torque shall bereleased. Following the removal of the proof torque,wrench openings will be regaged. Wrenches that do notsustain the proof torque or crack, fracture, or slip on themandrel, have failed the test. The wrench shall also beconsidered t
49、o have failed the test if there is permanentspreading of the open end jaw in excess of the “NO-GO“gage sizes of ASME B107.17M by more than the follow-ing at the tips:Copyright ASME International Provided by IHS under license with ASMENot for ResaleNo reproduction or networking permitted without license from IHS-,-,-WRENCH, CROWFOOT ASME B107.21-2005(a) 0.002 in. for nominal wr
