1、Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.The American Society of Mechanical Engineers A N M-E R I C A N N A T I O N A L S T A N D A
2、 R D SP R l N E P I C O l l E D NS TYPE-(METRII SERIES)ASME B18.8.3M-1995(Revision of ASME 61 8.8.3M-1994)Copyrighted material licensed to Stanford University by Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontroll
3、ed when printed.Date of Issuance:March 7.1996 This Standard will be revised when the Society approves the issuance of a new edition.There will be no addenda or written interpretations of the re-quirements of this Standard issued to this edition.ASME is the registered trademark of The American Societ
4、y of Mechanical Engineers.This code or standard was developed under procedures accredited as meeting the criteria for American National Standards.The Consensus committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an oppo
5、r-tunity to participate.The proposed code or standard was made available for public review and comment which provides an opportunity for additional public input from industry,academia,regulatory agencies,and the public-at-large.ASME does not approve,rate,or endorse any item,construction,proprietary
6、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 this document,and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable Letters Patent,nor a
7、ssume any such liability.Users of a code or standard are expressly advised that determination of the validity of any such patent rights,and the risk of infringement of such rights,is entirely their own responsibility.Participation by federal agency representative(s)or person(s)affiliated with indust
8、ry is not to be interpreted as government or industry endorsement of this code or standard.ASME accepts responsibility for only those interpretations issued in accordance with governing ASME procedures and policies which preclude the issuance of interpretations by individual vol-unteers.No part of t
9、his document may be reproduced in any form,in an electronic retrieval system or otherwise,without the prior written permission of the publisher.Copyright 0 1996 by THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS All Rights Reserved Printed in U.S.A.Copyrighted material licensed to Stanford University b
10、y Thomson Scientific(),downloaded on Oct-05-2010 by Stanford University User.No further reproduction or distribution is permitted.Uncontrolled when printed.FOREWORD(This Foreword is not part of ASME 818.8.3M-1995.)The need for a standard covering machine pins was recognized by industry as far back a
11、s March,1926,when the Sectional Committee on the Standardization of Machine Pins was organized under the procedure of the American Standards Association(later the United States of America Standards Institute and as of October 6,1969,the American National Standards Institute,Inc.),with the Society of
12、 Automotive Engineers and the American Society of Me-chanical Engineers as joint sponsors.For the next year or two,an effort was made via correspondence to develop a basis on which a standard for straight,taper,split,and dowel pins might be established.This correspondence developed a distinct differ
13、ence of opinion on the part of the manufacturers and users of taper machine pins,which fact seemed to discourage the members of the committee from attempting standardization on any of the types of pins within its scope.The sponsor organizations made frequent efforts to revive this project through le
14、tters and the distribution of technical literature on this general subject,without avail.In December,1941,in its periodic review of standards projects for which the Society is sponsor,the ASME Standardization Committee decided that there was little hope for reviving this project and voted,subject to
15、 acceptance by the sponsors,to suggest to the ASA the transfer of this project to Sectional Committee B5 on the Standardization of Small Tools and Machine Tool Elements.The sponsors agreed and on July 7,1942,the ASA sanctioned this action and Sectional Committee B43 was discharged and the project wa
16、s officially transferred to Sectional Committee B5.At its meeting in December,1942,Sectional Committee B5 voted to enlarge its scope to include machine pins.Technical Committee No.23 was subsequently established and charged with the responsibility for technical content of standards covering machine pins.This group held its first meeting on November 30,1943,at which time a Subgroup on Correlation and Recommendations was appointed and it was voted to include clevis pins in addition to the other pi