ANSI ASME B18.2.8-1999 Clearance Holes for Bolts Screws and Studs《螺栓 螺钉和双头螺柱的通孔》.pdf
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1、 The American Society of Mechanical Engineers AN AMERICAN NATIONAL STANDARD CLEARANEE HOLES FOR BOLTS, SCREWS, AND STUDS ASME 61 8.2.8-1 MUM Date of Issuance: October 7, 1999 This Standard will be revised when the Society approves the issuance of a new edition. There will be no addenda or written in
2、terpretations of the requirements of this Standard issued to this edition. 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 National Standards. The Standards Committe
3、e that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate. The proposed code or standard was made available for public review and comment, which provides an opportunity for additional public input from i
4、ndustry, academia, regulatory agencies, and the public-at-large. ASME 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 any items mentioned in
5、 this document, and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable Letters Patent, nor assume any such liability. Users of a code or standard are expressly advised that determination of the validity of any such patent rights, and the ris
6、k of infringement of such rights, is entirely their own responsibility. Participation by federal agency representativek) or person(s) affiliated with industry is not to be interpreted as government or industry endorsement of this code or standard. ASME accepts responsibilityforonly those interpretat
7、ions issued in accordance with governing ASME procedures and policies which preclude the issuance of interpretations by individual volunteers. 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
8、. The American Society of Mechanical Engineers Three Park Avenue, New York, NY 10016-5990 Copyright 0 1999 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in U.S.A. During its December 3, 1998 meeting, the ASME B18 Fastener Committee authorized preparation of a standard t
9、o establish clearance holes for inch- and metric-threaded fasteners. Some of the metric screw and bolt standards already had, as an appendix, the IS0 273 approved normal-, close-, and loose-clearance hole diameters. It was recognized that for inch standard fasteners there was no B18 standard size re
10、commendation. A draft standard was prepared using common industry inch clearance values selected to follow the general metric design of three degrees of clearance. The recommendations are all tabulated as minimum holes and tolerance is recommended using IS0 273 tolerance classes. The Standard also i
11、ncludes values for fasteners in each system using the standard drill sizes from the other system of measurement. This Standard should provide consistent application design information for the fasteners and can be a step toward rationalization of the tooling for fastener assembly operations. Metric s
12、tandards need not include the appended information in each threaded fastener standard and inch-threaded fastener standards will have standardized clearance hole recommendations. ASME B 18.2.8-1999 was approved by the American National Standards Institute (ANSI) on August 19, 1999. . 111 ASME B18 STA
13、NDARDS COMMllTEE Standardization of Bolts, Nuts, Rivets, Screws, Washers, and Similar Fasteners (The following is the roster of the Committee at the time of approval of this Standard.) OFFICERS D. A. Clever, Chair R. D. Strong, Vice Chair S. W. Vass. Vice Chair R. L. Crane, Secretary COMMITTEE PERSO
14、NNEL J. C. Akins, Safety Socket Screw Corp. J. Altman, Rotor Clip Co. J. B. Belford, Lawson Products, Inc. D. Broomfield, Illinois Tool Works, Inc. J. A. Buda, SPS Technologies D. A. Clever, Deere and Co. T. Collier, Cam-Tech Industries, Inc. R. L. Crane, The American Society of Mechanical Engineers
15、 A. C. DiCola, Wrought Washer Co. A. Dinh, Defense Industrial Supply Center W. D. Downing, Consultant B. A. Dusina, Federal Screw Works D. S. George, Ford Motor Co. J. Greenslade, Greenslade and Co. 6. Hasiuk, Defense Industrial Supply Center A. Herskovitz, U.S. Army ARDEC A. C. Hood, ACH Technologi
16、es J. Hubbard, Rockford Fastener, Inc. F. W. Kern, The Society of Automotive Engineers J. F. Koehl, Spirol International Corp. W. H. Kopke, ITW Shakeproof Assembly Co. J. G. Langenstein, Consultant M. Levinson, ITW Shakeproof Assembly Co. L. L. Lord, Caterpillar, Inc. A. D. McCrindle, Genfast Manufa
17、cturing Co. K. E. McCullough, Consultant R. F. Novotny, Textron M. D. Prasad, General Motors Corp. S. Savoji, ITW Medalist W. Schevey, BGM Fastener Co., Inc. R. D. Strong, General Motors Corp. J. F. Sullivan, National Fasteners Distribution Association R. L. Tennis, Caterpillar, Inc. S. W. Vass, Ind
18、ustrial Fasteners Institute C. B. Wackrow, MNP Corp. R. G. Weber, Fairfield University W. K. Wilcox, Naval Sea Systems Command C. J. Wilson, Industrial Fasteners Institute V SUBCOMMllTEE 2 - EXTERNAL DRIVE FASTENERS S. W. Vass, Chair, Industrial Fasteners Institute R. L. Crane, Secretary, The Americ
19、an Society of Mechanical Engineers D. Broomfield, Illinois Tool Works, Inc. R. M. Byrne, Trade Association Management, Inc. D. A. Clever, Deere and Co. A. P. Cockman, Ford Motor Co. R. J. Corbett, Huck International Industrial Fasteners A. Dinh, Defense Industrial Supply Center D. S. George, Ford Mo
20、tor Co. J. Greenslade, Greenslade and Co. A. Herskovitz, U.S. Army ARDEC M. W. Holubecki, Electric Boat Corp. J. Hubbard, Rockford Fastener, Inc. L. L. Lord, Caterpillar, lnc. A. D. McCrindle, Genfast Manufacturing Co. K. E. McCullough, Consultant J. A. Schlink, Caterpillar, Inc. R. L. Tennis, Cater
21、pillar, Inc. C. 6. Wackrow, MNP Corp. W. K. Wilcox, Naval Sea Systems Command C. J. Wilson, Industrial Fasteners Institute vi CORRESPONDENCE WITH THE B18 COMMITTEE General. ASME Standards are developed and maintained with the intent to represent the consensus of concerned interests. As such, users o
22、f this Standard may interact with the Committee by requesting interpretations, proposing revisions, and attending Committee meetings. Correspondence should be addressed to: Secretary, B 18 Main Committee The American Society of Mechanical Engineers Three Park Avenue New York, NY 10016-5990 Proposing
23、 Revisions. Revisions are made periodically to the Standard to incorporate changes that appear necessary or desirable, as demonstrated by the experience gained from the application of the Standard. Approved revisions will be published periodically. The Committee welcomes proposals for revisions to t
24、his Standard. Such proposals should be as specific as possible, citing the paragraph number(s), the proposed wording, and a detailed description of the reasons for the proposal, including any pertinent documentation. Interpretations. Upon request, the B18 Committee will render an interpretation of a
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- ANSIASMEB18281999CLEARANCEHOLESFORBOLTSSCREWSANDSTUDS 螺栓 螺钉 双头螺柱 PDF
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