1、ASME B18.8.2-2000(Revision of ANSI/ASME B18.8.2-1995)TAPER PINS, DOWEL PINS, STRAIGHT PINS, GROOVEDPINS, AND SPRING PINS(INCH SERIES)AN AMERICAN NATIONAL STANDARDAN AMERICAN NATIONAL STANDARDTAPER PINS, DOWEL PINS, STRAIGHT PINS, GROOVEDPINS, AND SPRING PINS(INCH SERIES)ASME B18.8.2-2000(Revision of
2、 ANSI/ASME B18.8.2-1995)Date of Issuance: October 31, 2001The 2001 edition of this Standard is being revised with an automatic addendasubscription service. The use of an addenda allows revisions made inresponse to public review comments or committee actions to be publishedas necessary. The next edit
3、ion of this Standard is scheduled for publicationin 2006.ASME will issue written replies to inquiries concerning interpretation oftechnical aspects of this Standard.ASME is the registered trademark of The American Society of Mechanical Engineers.This code or standard was developed under procedures a
4、ccredited as meeting the criteria forAmerican National Standards. The Standards Committee that approved the code or standardwas balanced to assure that individuals from competent and concerned interests have had anopportunity to participate. The proposed code or standard was made available for publi
5、c reviewand comment that 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 device,or activity.ASME does not take any position with respect to the v
6、alidity of any patent rights asserted inconnection with any items mentioned in this document, and does not undertake to insure anyoneutilizing a standard against liability for infringement of any applicable Letters Patent, nor assumesany such liability. Users of a code or standard are expressly advi
7、sed that determination of thevalidity of any such patent rights, and the risk of infringement of such rights, is entirely theirown responsibility.Participation by federal agency representative(s) or person(s) affiliated with industry is not tobe interpreted as government or industry endorsement of t
8、his code or standard.ASME accepts responsibility for only those interpretations issued in accordance with governingASME procedures 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 o
9、therwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersThree Park Avenue, New York, NY 10016-5990Copyright 2001 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll Rights ReservedPrinted in U.S.A.FOREWORDThe need for a standard covering machine pins
10、was recognized by industry as far backas March, 1926, when the Sectional Committee on the Standardization of Machine Pinswas organized under the procedure of the American Standards Association (later the UnitedStates of America Standards Institute and as of October 6, 1969, the American NationalStan
11、dards Institute, Inc.), with the Society of Automotive Engineers and the AmericanSociety of Mechanical Engineers as joint sponsors.For the next year or two an effort was made via correspondence to develop a basis onwhich a standard for straight, taper, split, and dowel pins might be established. Thi
12、scorrespondence exposed a distinct difference of opinion on the part of the manufacturersand users of taper machine pins, which seemed to discourage the members of the committeefrom attempting standardization on any of the types of pins within its scope. The sponsororganization made frequent efforts
13、 to revive this project through letters and the distributionof technical literature on this general subject, without avail.In December, 1941, during its periodic review of Society-sponsored standards, the ASMEStandardization Committee decided that reviving the project was unlikely and voted (subject
14、to acceptance by the sponsors) to suggest to the ASA the transfer of this project to SectionalCommittee B5 on the Standardization of Small Tools and Machine Tool Elements. Thesponsors agreed and on July 7, 1942, the ASA sanctioned this action and Sectional CommitteeB43 was discharged and the project
15、 was officially transferred to Sectional Committee B5.At its meeting in December, 1942, Sectional Committee B5 voted to enlarge its scopeto include machine pins. Technical Committee No. 23 was subsequently established andcharged with the responsibility for technical content of standards covering mac
16、hine pins.This group held its first meeting on November 30, 1943, at which time a subgroup onCorrelation and Recommendations was appointed and it was voted to include clevis pinsin addition to the other pin types already under consideration. Several drafts were preparedby the subgroup, distributed f
17、or critical comment to users, manufacturers, and generalinterests and revised and resubmitted for comments. This action finally resulted in acceptanceby Technical Committee 23 of a draft dated November, 1945. Proofs of the draft, with adate of October, 1946 were distributed to the members of Section
18、al Committee B5 forletter ballot approval. After the approval of the Sectional Committee, the proposal was nextapproved by the sponsor bodies, and presented to the American Standards Association forapproval as an American Standard. This designation was granted on July 7, 1947.Following the issuance
19、of the standard it became apparent that the table on cotter pinsneeded revision. Accordingly in 1953 a proposed revision was submitted to the SectionalCommittee. After attaining Sectional Committee and sponsor approval this revision wasapproved by the American Standards Association on July 9, 1954 a
20、s ASA B5.20-1954.In 1956 and 1957, in response to requests from industry, extensive changes wereincorporated into a proposed revision. These included revisions to chamfer values andtolerances on straight pins and unhardened ground dowel pins; revisions to under-head-to-hole, pin end dimensions, and
21、hole size tolerances on clevis pins; addition of chisel pointto cotter pin end-styles; and the incorporation of coverage on grooved pins. FollowingSectional Committee and sponsor approvals, this revision was adopted by the AmericanStandards Association on March 25, 1958, as ASA B5.20-1958.iiiIn late
22、 1961, Sectional Committee B5 suggested that Sectional Committee B18 on thestandardization of bolts, nuts, rivets, screws, and similar fasteners assume jurisdiction overstandards for pins. Recognizing that the bulk of the products covered in the ASA B5.20standards were fastener rather than machine o
23、riented, this recommendation was supportedby the B18 Committee and officially endorsed by the sponsor organizations. Consequentlythis Committee, at the September 14, 1962 meeting, decreed that Subcomittee 23* shouldbe formed to review and update the pin standard.At the initial meeting, held on June
24、3, 1964, Subcommittee 23* decided to add standardsfor spring pins and to establish seven subgroups, each of which would have technicalresponsibility for specific pin products, and to publish respective products under separatecover as projects were completed.Over several years, work by Subgroups 2, 3
25、, 4, 5, and 6 culminated in a proposal forrevising the standards covering taper, dowel, straight, and grooved pins and includingcoverage for spring pins (which was approved through letter ballot by Subcommittee 8 onFebruary 24, 1977). After acceptance by American National Standards Committee B18 and
26、the sponsor organizations, this document was submitted to the American National StandardsInstitute for approval as an American National Standard. Approval was granted on April5, 1978 and the standard was published under the designation ANSI B18.8.2, supersedingin part the coverage provided in ASA B5
27、.20-1958.The B18.8.2 standard has been reaffirmed once without change in 1989 since the 1978edition was published. The 1995 edition of B18.8.2 contains significant changes to the 1989edition of B18.8.2 and was developed by the American Society of Mechanical EngineersB18 Committee on Fasteners.This S
28、tandard was approved by the American National Standards Institute on June 22, 2000.* As of April 1, 1966 Subcommittee 23 was redesignated Subcommittee 8.ivASME B18 STANDARDS COMMITTEEStandardization of Bolts, Nuts, Rivets, Screws,Washers, and Similar Fasteners(The following is the roster of the Comm
29、ittee at the time of approval of this Standard.)OFFICERSD. A. Clever, ChairR. D. Strong, Vice ChairS. W. Vass, Vice ChairR. L. Crane, SecretaryCOMMITTEE PERSONNELD. R. Akers, Alternate, Industrial Fasteners InstituteJ. Altman, Rotor Clip Co.J. B. Belford, Lawson Products, Inc.J. A. Buda, SPS Technol
30、ogies, Inc.R. M. Byrne, Trade Association Management, Inc.D. A. Clever, Deere however, they should not contain proprietary names orinformation.Requests that are not in this format will be rewritten in this format by the Committeeprior to being answered, which may inadvertently change the intent of t
31、he original request.ASME procedures provide for reconsideration of any interpretation when or if additionalinformation that might affect an interpretation is available. Further, persons aggrieved byan interpretation may appeal to the cognizant ASME Committee or Subcommittee. ASMEdoes not “approve,”
32、“certify,” “rate,” or “endorse” any item, construction, proprietary device,or activity.Attending Committee Meetings. The B18 Standards Committee regularly holds meetings,which are open to the public. Persons wishing to attend any meeting should contact theSecretary of the B18 Standards Committee.vii
33、CONTENTSForeword . iiiCommittee Roster vCorrespondence with B18 Committee vii1 Introductory Notes 12 General Data for Taper Pins . 33 General Data for Hardened Ground Machine Dowel Pins . 44 General Data for Hardened Ground Production Dowel Pins 95 General Data for Unhardened Ground Dowel Pins 106 G
34、eneral Data for Straight Pins 157 General Data for Grooved Pins, Grooved Drive Studs, and Grooved T-HeadCotter Pins 168 General Data for Spring Pins 26Tables1 Dimensions of Taper Pins 21A Standard Sizes and Lengths of Taper Pins 52 Dimensions of Hardened Ground Machine Dowel Pins . 62A Preferred Siz
35、es and Lengths of Hardened Ground Machine Dowel Pins . 73 Dimensions of Hardened Ground Production Dowel Pins . 113A Preferred Sizes and Lengths of Hardened Ground Production Dowel Pins . 124 Dimensions of Unhardened Ground Dowel Pins . 134A Preferred Sizes and Lengths of Unhardened Ground Dowel Pin
36、s . 145 Dimensions of Chamfered and Square End Straight Pins . 176 Dimensions of Grooved Pins . 206A Expanded Diameters for Grooved Pins Made From Low Carbon or Alloy Steel . 216B Expanded Diameters for Grooved Pins Made From Corrosion Resistant Steel and Monel 226C Standard Sizes and Lengths of Gro
37、oved Pins 237 Dimensions of Round-Head Grooved Drive Studs . 247A Pilot Length Dimensions for Round-Head Grooved Drive Studs 248 Dimensions of Grooved T-Head Cotter Pins . 258A Groove Length Dimensions for Grooved T-Head Cotter Pins . 259 Practical Sizes and Lengths of Coiled- and Slotted-Type Sprin
38、g Pins . 2710 Dimensions of Slotted-Type Spring Pins 2811 Dimensions of Coiled-Type Spring Pins . 29Figure1 Point Concentricity 7viiiNonmandatory AppendicesA Recommended Hole Specifications for Taper Pins . 33B Double Shear Testing of Pins 36C Type B, C, and D Grooved Pin Dimensions 37D Conversion T
39、able for SAE and UNS Material Specifications . 38ixASME B18.8.2-20001 INTRODUCTORY NOTES1.1 Scope1.1.1 This Standard is intended to cover the com-plete dimensional and general data for taper pins,dowel pins, straight pins, grooved pins, and spring pinsrecognized as “American National Standard,” whic
40、hare widely used in general industrial applications. Alsoincluded are appendices providing supplementary infor-mation for the drilling of holes for taper pins and thetesting of pins in double shear.1.1.2 The inclusion of dimensional data in thisStandard is not intended to imply that all of the produ
41、ctsdescribed are stock production sizes. Consumers arerequested to consult with manufacturers concerningavailability of product.1.2 Types of PinsThe types of pins covered by this Standard aredescribed in subparagraphs 1.2.1 through 1.2.5.1.2.1 Taper Pins. Taper pins shall have a uniformtaper over th
42、e pin length with both ends crowned. Mostsizes are supplied in both commercial and precisionclasses, the latter having generally tighter tolerancesand being more closely controlled in manufacture.Dimensions for both classes are given in Table 1.1.2.2 Dowel Pins. The following three varietiesof dowel
43、 pins, each serving specific needs, are covered.1.2.2.1 Hardened Ground Machine DowelPins. This variety of hardened dowel pins shall haveground cylindrical sides with one end pointed slightly toenter mating drive-fit holes and the other end roundedor crowned for driving purposes. They are available
44、instandard and oversize diameter series to satisfy initialand replacement requirements, respectively. These dowelpins are intended for applications where precise locatingof mating parts is essential, such as, for doweling hard-ened tool and machine components or to serve as stops,guides, and load be
45、aring pins, etc., where strength, shock,or wear factors necessitate a hardened pin. Dimensionsfor both series are given in Table 2.1.2.2.2 Hardened Ground Production DowelPins. This variety of hardened dowel pin shall have1ground cylindrical sides with both ends rounded suffi-ciently to enable the p
46、in to be pressed into drive-fit holes. These dowel pins are used extensively forapplications such as those cited for hardened groundmachine dowel pins, in volume production situations,entailing automated installation equipment. Dimensionsare given in Table 3.1.2.2.3 Unhardened Ground Dowel Pins.This
47、 variety of dowel pin shall have ground cylindricalsides with both ends chamfered. These pins are intendedfor applications similar to those cited for the othervarieties of dowel pins where strength, shock, and wearfactors do not warrant use of hardened pins, such as,prealigning component parts to be
48、 assembled withthreaded fasteners, stops, guides, or pivots subject tolittle wear, and as low-shear load-bearing pins. Dimen-sions are given in Table 4.1.2.3 Straight Pins. Straight pins shall have un-ground, straight cylindrical sides with both ends defi-nitely chamfered on chamfered straight pins
49、and withboth ends having broken corners or being slightlychamfered on square end straight pins. Dimensions aregiven in Table 5.1.2.4 Grooved Pins. Grooved pins shall have un-ground, straight cylindrical sides with three or moreswaged or extruded grooves equally spaced around theperiphery to displace material beyond the basic pindiameter. Both ends of pin are normally crowned orchamfered. Grooved pins are available in several typesto satisfy various design considerations and also inheaded versions, grooved drive studs, and grooved T-head cotter pins. Upon installation, the material dis-placed
