1、AN AMERICAN NATIONAL STANDARD ASME B18.9-2012(Revision of ASME B18.9-2007)Plow BoltsASME B18.9-2012(Revision of ASME B18.9-2007)Plow BoltsAN AMERICAN NATIONAL STANDARDThree Park Avenue New York, NY 10016 USADate of Issuance: July 25, 2012This Standard will be revised when the Society approves the is
2、suance of a new edition.ASME issues written replies to inquiries concerning interpretations of technical aspects of thisStandard. Periodically certain actions of the ASME B18 Committee may be published as Cases. Casesand interpretations are published on the ASME Web site under the Committee Pages at
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5、onInformation” section.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 a
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7、arge.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 anyitems mentioned in this document, and does not undertake to insure anyone utiliz
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10、SME 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 otherwise,without the prior written permission of the publisher.The American Society of Mechanical EngineersThree Pa
11、rk Avenue, New York, NY 10016-5990Copyright 2012 byTHE AMERICAN SOCIETY OF MECHANICAL ENGINEERSAll rights reservedPrinted in U.S.A.CONTENTSForeword ivCommittee Roster . viCorrespondence With the B18 Committee vii1 Introduction . 12 General Data 1Tables1 Dimensions of No. 3 Head Plow Bolts (Round, Co
12、untersunk, Square Neck) 32 Dimensions of No. 7 Head Plow Bolts (Round, Countersunk, Reverse Key) 43 Dimensions of No. 4 Repair Head Plow Bolts (Square Head, Countersunk) . 54 Dimensions of No. 6 Repair Head Plow Bolts(Round, Countersunk, Heavy Key) 65 Clipped Head Plow Bolt 66 Elliptical Head Plow B
13、olt . 77 Minimum Thread Lengths of Plow Bolts (2D + 0.25) . 88 Tolerance on Length 89 Plus Tolerance on Thread Length . 8Nonmandatory AppendixA Dimensions of Obsolete Plow Bolts . 9iiiFOREWORDASME StandardsCommittee B18for the Standardizationof Bolts,Nuts, Rivets, Screws,Washers,and Similar Fastener
14、s (formerly American National Standards Committee B18) was organizedin March 1992 as Sectional Committee B18 under the aegis of the American Engineering StandardsCommittee later the American Standards Association (ASA), the United States of AmericaStandards Institute (USASI), and, as of October 6, 1
15、969, the American National Standards Institute(ANSI) with the Society of Automotive Engineers (SAE) and The American Society of MechanicalEngineers (ASME) as joint sponsors. Subcommittees 2, 5, and 6 (later designated asSubcommittee 9) were subsequently established and charged with the responsibilit
16、ies for thetechnical content of standards for external drive bolts and nuts, round unslotted head bolts, andplow bolts, respectively.The National Association of Farm Equipment Manufacturers (NAFEM) had previouslyappointed a committee to standardize plow bolts. This committee was at work simplifying
17、thelist of types then in use. Its first recommendation reduced the total number to seven typesrepresenting 182 varieties. These were the No. 1 Key Head; No. 2 Round Countersunk; No. 3Round Head, Square Neck; No. 4 Square Head; No. 5 Large Round Countersunk; No. 6 RoundHead, Heavy Key; and No. 7 Roun
18、d Head, Reverse Key. Later, at a general conference called bythe Division of Simplified Practice, U.S. Department of Commerce, the NAFEM Committeerecommended four types of plow bolts representing 42 varieties. These were the Nos. 3, 4, 6, and7 types. Following the Washington conference in February 1
19、924, NAFEM appointed one of itsmembers to represent it on Subcommittee 6. The recommendations of the NAFEM Committeewere carefully reviewed by Subcommittee 6, and Standard B18f-1928 was prepared and subse-quently issued.Many of the nonstandard types and variations of standard types continued to be u
20、sed, onebolt manufacturer alone reporting production of 17 basic types with 54 variations in the headproportions of the No. 3 type, exclusive of diameter and length.In 1945, the Department of Commerce Simplified Practice Committee found that the Nos. 1,2, 3, 4, and 7 bolts were the most widely used,
21、 while the No. 6 bolt had little use. No dimensionalstandards existed for the Nos. 1 and 2. These findings were substantiated by a comprehensivesurvey conducted by the American Institute of Bolt, Nut, and Rivet Manufacturers (AIBNRM),who also found a limited requirement for the No. 8 head.In June 19
22、47, Subcommittee 6 was reorganized to study the problem and revise the Plow BoltStandard. Sentiment in the industry demanded simplification, so the subcommittee revised thedimensions of the No. 3 Round Head, Square Neck bolt and recommended its adoption as thestandard Regular Head Plow Bolt for new
23、designs in place of the Nos. 4, 6, and 7 Regular HeadBolts. They concluded that the No. 1 Protruding Key Head and the No. 8 Concave Head werespecial with each company, particularly the latter, where the head tops have the contours requiredby special usage. Use of the No. 1 was not considered necessa
24、ry, as standard keys are available,and the No. 2 Countersunk Head was not included since it is available as a machine bolt.The standard was considered in the light of expanding use of medium carbon and alloy steelsand in railroad equipment, deep soil plows, cleaning machinery, tractors, corn cutters
25、, manurespreaders, hay rakes, and implements of widely varied types.In the fall of 1947, a letter and ballot were sent out to all known manufacturers and users ofplow bolts to obtain comments on the proposed dimensions of the No. 3 head and a proposalto make it the sole standard for new designs. The
26、 comments received from over 80% of thecirculation indicated favor of the proposals. The greatest demand of the dissenters was forinclusion of the No. 7 head. As a result, the committee further revised the No. 3 and revised andrestored the No. 7 head. It was decided to place the No. 4 regular head i
27、n an appendix, sincethe Nos. 3 and 7 heads could be used in most cases. The same action was taken for the No. 6regular head. The intent was to emphasize the use of Nos. 3 and 7 regular heads for new designs.The Nos. 3, 4, 6, and 7 repair heads were brought up to date and retained in the standard.ivM
28、aximum and minimum limits were set for the square depth of the No. 3, and the “wash out“of the corners and bottoms of squares and keys were controlled by established radii. Withoutchanging feed, head angles, or head heights, and without changing head proportions, the relation-ship of the feed to the
29、 minimum head diameter was so set up that some feed was always availablefor grinding when the head diameter was at the minimum. The maximum head diameter wasadjusted so that trimming the head would be optional if the feed was at the maximum andtrimming was not specifically required.Elimination of th
30、e916in. size was considered, but it was decided to include it with the comment,“This size is not recommended.”Existing American Iron and Steel Institute (AISI) plus and minus tolerances on hot rolled barrequired the addition of a plus tolerance to the nominal bolt diameter in setting the maximumbody
31、 diameter for the916in. and larger sizes.Thread lengths were limited by a maximum as well as a minimum. Due to wear, plow boltsfunction partly in shear, and it was necessary to limit the number of threads in bearing.The specification of one key width on all sizes of the No. 7 head is indefensible fr
32、om thestandpoint of both usage and manufacture. To rectify this would cause tremendous confusion,since new bolts might not fit in the old holes and vice versa. If the corrected head was given anew head number, this would also be confusing, since it would be hard to distinguish from theNo. 7 head now
33、 in production and use. As a result, no solution was found practicable at this time.A revised draft was submitted to the industry for review, and every known manufacturer ofplow bolts was invited to attend a meeting of the subcommittee in September 1948. Variousobjections wereagain reviewed, andthis
34、 proposal,containing some refinements,was unanimouslyapproved by the subcommittee and submitted for ballot in June 1949. Following approval of thesectional committee and sponsor organizations, this proposal was presented to ASA for approvaland designation as an American Standard. This was granted on
35、 March 22, 1950.A revision of the American Standard Plow Bolts, B18.9-1950, submitted by the sponsors ofproject B18, was approved by ASA on on February 12, 1958.Subcommittee 9 was merged into Subcommittee 5 in 1977, and Subcommittee 5 was merged intoSubcommittee 2 in December 1986. Committee B18 agr
36、eed the designations of the Subcommittee 2,5, and 9 documents should not be changed, since such changes would adversely affect currentreferences to these standards.A proposed update revision of this Standard was circulated for letter ballot of Subcommittee2 and Committee B18 on October 19, 1995. Fol
37、lowing approval by Subcommittee 2 and CommitteeB18, this revision was approved by the secretariat and submitted to ANSI for approval as anAmerican National Standard. This was granted on May 7, 1996.ASME B18.9-2007 was approved as an American National Standard on March 7, 2007.In early 2011, the B18
38、Committee received a request from a domestic bolt producer to modifysome of the nonfunctional dimensions on the plow bolt design in Tables 1, 2, and 3 to helpincrease the life of the cold heading tooling used to manufacture these parts. B18 memberscontacted the major users of plow bolts and it was d
39、etermined that the requested changes wouldnot adversely affect the function of these bolts. Based on the user feedback, the B18 Committeeundertook a complete revision of B18.9.In addition to the requested changes made to Tables 1, 2, and 3, two more tables were addedto the Standard to cover clipped
40、head plow bolts and elliptical head plow bolts that were notpreviously covered. Plow bolts made to B18.9-2007 according to Tables, 1, 2, and 3 that conformedto those requirements will also conform to this revision. The format and references cited in theStandard were also brought into alignment with
41、other recently revised B18 standards.Suggestions for improvement of this Standard are welcome. They should be addressed to theSecretary, ASME B18 Standards Committee, The American Society of Mechanical Engineers,Three Park Ave., New York, NY 10016-5990.This revision was approved as an American Natio
42、nal Standard on June 19, 2012.vASME B18 COMMITTEEStandardization 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.)STANDARDS COMMITTEE OFFICERSJ. Greenslade, ChairD. S. George, Vice ChairR. D. Strong,
43、Vice ChairC. J. Gomez, SecretarySTANDARDS COMMITTEE PERSONNELV. Cartina, Autocraft IndustrialD. A. Clever, Contributing Member, ConsultantA. P. Cockman, Ford Motor Co.C. D. de la Garza, TSP, Inc.D. S. George, Ramco SpecialtiesC. J. Gomez, The American Society of Mechanical EngineersJ. Greenslade, In
44、dustrial Fasteners InstituteJ. J. Grey, Contributing Member, Fastener Consulting Services, Inc.A. Herskovitz, Contributing Member, ConsultantJ. Hubbard, Leland-Powell Fasteners, Inc.J. Jennings, Contributing Member, Naval Surface Warfare CenterW. H. King, Porteous Fastener Co.SUBCOMMITTEE 2 EXTERNAL
45、LY DRIVEN FASTENERSJ. Greenslade, Chair, Industrial Fasteners InstituteC. B. Williamson, Vice Chair, Fastenal Co.T. Anderson, Bay BoltV. Cartina, Autocraft IndustrialL. Claus, ATF, Inc.A. P. Cockman, Ford Motor Co.C. D. de la Garza, TSP, Inc.B. A. Dusina, Federal Screw WorksM. A. Elmi, ConsultantJ.
46、S. Foote, Trade Association Management, Inc.M. C. Friel, Hayden Bolts, Inc.D. S. George, Ramco SpecialtiesA. Herskovitz, ConsultantM. W. Holubecki, Electric Boat Corp.J. Hubbard, Leland-Powell Fasteners, Inc.J. Jennings, Contributing Member, Naval Surface Warfare CenterW. H. King, Porteous Fastener
47、Co.viM. D. Prasad, Contributing Member, GlobalM however, they shouldnot contain proprietary names or information.Requests that arenot in this format may berewritten in the appropriate formatby the Committeeprior to being answered, which may inadvertently change the intent of the original request.ASM
48、E procedures provide for reconsideration of any interpretation when or if 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 “
49、endorse” any item, construction, proprietary device, or activity.Attending Committee Meetings. The B18 Standards Committee regularly holds meetings, whichare open to the public. Persons wishing to attend any meeting should contact the Secretary ofthe B18 Standards Committee.viiINTENTIONALLY LEFT BLANKviiiASME B18.9-2012PLOW BOLTS1 INTRODUCTION1.1 Scope1.1.1 This Standard covers general and dimen-sional data for inch series plow bolts recognized asAmerican National Standard.1.1.2 The inclusion of dimensional data in thisStandard is not intended to imply that all of the productsdes
