1、AN AMERICAN NATIONAL STANDARDTrack Boltsand NutsASME B18.10-2006Revision of ANSI/ASME B18.10-1982 (R2005)Intentionally left blank ASME B18.10-2006Revision of ANSI/ASME B18.10-1982 (R2005)Track Boltsand NutsAN AMERICAN NATIONAL STANDARDThree Park Avenue New York, NY 10016Date of Issuance: August 14,
2、2006This Standard will be revised when the Society 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
3、the Committee Pages athttp:/www.asme.org/codes/ as 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 app
4、roved the code or standard was balanced to assure that 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, acade
5、mia,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 anyitems mentioned in this document, an
6、d does not undertake to insure anyone utilizing a standard 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
7、 such rights, isentirely their own responsibility.Participation 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
8、 issued in accordance with the establishedASME 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 Ameri
9、can Society of Mechanical EngineersThree Park Avenue, New York, NY 10016-5990Copyright 2006 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 Ova
10、l Neck Track Bolts . 32 Elliptic Neck Track Bolts . 43 Track Bolt Nuts 54 Track Bolt Inspection Levels 55 Track Nut Inspection Levels 5Nonmandatory AppendicesA Oval Neck Track Bolts . 6B Elliptic Neck Track Bolts . 7C Track Bolt Nuts 8iiiFOREWORDSectional Committee B18 on Dimensional Standardization
11、 of Bolts, Nuts, Rivets, Screws, andSimilar Fasteners was organized in March 1922, under the procedure of the American StandardsAssociation with the Society of Automotive Engineers and The American Society of MechanicalEngineers as joint sponsors.Following the organization of the Sectional Committee
12、, subcommittees were appointed tofacilitate development of standards for the several types of bolts and nuts within the scope ofits activity. Subcommittee No. 4 on Track Bolts and Nuts was organized in March 1923. With thecooperation of the Rail Committee of the American Railway Engineering Associat
13、ion, EngineeringDivision of the American Railway Association, a study was made first of the various types oftrack bolts in use in the United States. In March 1924, two series of proposed standard dimensionsfor track bolt heads were developed conforming to that practice. This activity finally resulte
14、d inthe approval and issuance of an American Standard known as B18d in November 1930.Following its reorganization, the Sectional Committee in February 1947 decided that a furtherstudy should be made of the existing standards. Some types and sizes were no longer requirednor specified by users. Furthe
15、rmore, manufacturers presented data on the multiplicity of designsand dimensional features of nuts and bolts which complicated stock sizes, dies, and tools.Therefore, a new subcommittee was formed in May 1947. It was agreed that a comprehensiveseries of tests would be beneficial, particularly in det
16、ermining dimensional features of track nutsas compared to the strength and design of the track bolt. Plans for the tests were developed indetail and conducted at one of the Republic Steel Corporations plants in Cleveland, Ohio during1947 and 1948. These tests were mostly of the static tension type a
17、nd involved hundreds ofspecimens and literally thousands of measurements.Analysis of these tests indicated the desirability of making a series of torque tests which wouldbe more in the nature of actual usage of track bolts and nuts in service.Testing equipment was assembled and the actual work was c
18、onducted at the Roanoke, VirginiaShops of the Norfolk however, theyshould not contain 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 re
19、quest.ASME 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,” “ra
20、te,” or “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
21、 left blank ASME B18.10-2006TRACK BOLTS AND NUTS1 INTRODUCTION1.1 ScopeThis Standard covers the complete general and dimen-sional data for inch series oval neck and elliptic necktrack bolts and square nuts intended for use with thesebolts, and recognized as an American NationalStandard. Sizes in use
22、, but not recommended for newdesign, are included in the appendices of this Standard.1.2 Comparison to ISO StandardsThere is no ISO standard for these products at thistime.1.3 DimensionsThe inclusion of dimensional data in this Standard isnot intended to imply that all of the products describedherei
23、n are stock production sizes. Purchasers shouldconsult with suppliers concerning lists of stock produc-tion sizes.All dimensions in this Standard are in inches, unlessotherwise stated, and apply to unplated or uncoatedproducts. When plating or coating is specified, the fin-ished product dimensions s
24、hall be as agreed uponbetween supplier and purchaser.Definitions of specified geometric characteristics arein accordance with ASME Y14.5M.1.4 OptionsOptions, where specified, shall be at the discretion ofthe manufacturer unless otherwise agreed upon by themanufacturer and the purchaser.1.5 Terminolo
25、gyAll terms used in this Standard are defined in ASMEB18.12.1.6 ReferencesUnless otherwise specified, the referenced standardshall be the most recent issue at the time of orderplacement.ASME B1.1, Unified Inch Screw Threads (UN and UNRThread Form)ASME B1.3M, Screw Thread Gaging Systems forDimensiona
26、l AcceptabilityInch and Metric ScrewThreads (UN, UNR, UNJ, M, and MJ)ASME B18.2.1, Square and Hex Bolts and Screws (InchSeries)1ASME B18.2.2, Square and Hex Nuts (Inch Series)ASME B18.12, Glossary of Terms for MechanicalFastenersASME B18.18.1M, Inspection and Quality Assurance forGeneral Purpose Fas
27、tenersASME B18.18.2M, Inspection and Quality Assurance forHigh-Volume Machine Assembly FastenersASME B18.18.3M, Inspection and Quality Assurance forSpecial Purpose FastenersASME B18.18.4M, Inspection and Quality Assurance forFasteners for Highly Specialized EngineeredApplicationsASME B18.24, Part Id
28、entifying Number (PIN) CodeSystem for B18 Fastener ProductsASME Y14.5M, Dimensioning and TolerancingPublisher: The American Society of MechanicalEngineers (ASME), Three Park Avenue, New York, NY10016-5990; Order Department: 22 Law Drive, P.O. Box2300, Fairfield, NJ 07007-2300ASTM A 183, Specificatio
29、n for Carbon Steel Track Boltsand NutsASTM A 354, Standard Specification for Quenched andTempered Alloy Steel Bolts, Studs, and OtherExternally Threaded FastenersASTM A 449, Standard Specification for Quenched andTempered Steel Bolts and StudsASTM A 563, Carbon and Alloy Steel NutsASTM F 788/F 788M,
30、 Standard Specification for SurfaceDiscontinuities of Bolts, Screws, and StudsInch andMetric SeriesASTM F 812/F 812M, Standard Specification for SurfaceDiscontinuities of NutsInch and Metric SeriesPublisher: ASTM International (ASTM), 100 Barr HarborDrive, P.O. Box C700, West Conshohocken, PA19428-2
31、9591.7 Part Identifying NumberA numbering system for the specification of thesestandard products is found in ASME B18.24.2 GENERAL DATA2.1 HeadsThe design and dimensions of the heads have beencommonly referred to as the mushroom head.ASME B18.10-2006 TRACK BOLTS AND NUTS2.2 NecksTypes of track bolts
32、 are designated as “oval neck” and“elliptic neck.”2.3 Body DiametersThis Standard provides for two styles of body diame-ters. Bolts shall be provided with a full size body inaccordance with the respective table dimensions of Table1 or 2 for body diameter, E, unless a reduced bodydiameter is specifie
33、d on the purchase order. These shallhave a body diameter not less than the minimum pitchdiameter of the thread and not exceeding the minimumbody diameter, E, shown in Table 1 or 2.2.4 Bolt LengthThe bolt length shall be the distance measured parallelto the axis of the product from the bearing surfac
34、e ofthe head to the extreme end of the bolt, including thepoint if the product is pointed.2.5 ThreadsBolt threads shall be rolled unless otherwise agreedto between the purchaser and the supplier.Threads shall be Unified Inch Series, Class 2A as speci-fied in respective dimensional tables in ASME B1.
35、1.2.5.1 Thread Acceptance Gaging. Unless otherwisespecified, dimensional acceptability of screw threadsshall be determined based on System 21, ASME B1.3M.2.6 Thread LengthThe length of thread shall be measured parallel to theaxis of the bolt from the end of the bolt to the lastcomplete (fully formed
36、) thread. The minimum threadlength, LT, shall be as shown in Tables 1 and 2. Thetolerance on thread length shall be + 0.187 in. or 2.5 pitch, whichever is greater. Bolts of nominal lengths tooshort to accommodate the minimum thread lengths shallbe threaded full length. The distance from the neck tot
37、he first complete (full form) thread shall not exceed 212threads for sizes up to and including 1 in. and 312threadsfor sizes over 1 in.2.7 Pointed ProductsUnless otherwise specified, bolts need not be pointed.When pointed, the first full formed thread at a majordiameter is located at a distance no g
38、reater than 2 timesthe pitch measured from the end of the screw. This dis-tance is to be determined by measuring how far thepoint enters into a cylindrical NOT GO major diameterring gage.2.8 StraightnessShanks of bolts shall be straight within the followinglimits at Maximum Material Condition (MMC).
39、 For boltswith nominal lengths up to and including 12 in., the2maximum camber shall be 0.006 in. per inch (0.006L)ofbolt length. For bolts having a full diameter body, atypical gage and gaging procedure for checking boltstraightness is given in Appendix I of ASME B18.2.1.For bolts with an undersized
40、 body, the gaging methodshall be the sleeve gage shown in Appendix II of ASMEB18.2.1.2.9 Track Bolt NutsTrack bolt nuts shall be dimensionally in accordancewith ASME B18.2.2. Selected sizes are included inTable 3.2.10 FinishUnless otherwise specified, bolts and nuts shall besupplied with a plain (as
41、 processed) finish, unplated oruncoated.2.11 WorkmanshipBolts and nuts shall be visually, without magnifica-tion, free from burrs, seams, laps, loose scales, irregularsurfaces, and any defects affecting their serviceability.When control of surface discontinuities for bolts isrequired, the purchaser
42、shall specify conformance toASTM F 788/F 788M.When control of surface discontinuities for nuts isrequired, the purchaser shall specify conformance toASTM F 812/F 812M.2.12 DesignationBolts and nuts shall be designated by data in thefollowing sequences as shown:(a) product name(b) nominal size (fract
43、ional or decimal equivalent)(c) threads per inch(d) product length (fractional or two-place decimalequivalent)(e) material, including specification where necessary(f) protective finish if requiredSee the following examples:EXAMPLES:(1) Oval neck track bolt, ASME B18.10,789 212, steel, ASTMA 449, Typ
44、e 3, plain finish(2) Heavy square nut, ASME B18.10,78 9, steel, ASTM A 563,Grade DH, plain finish2.13 Identification Symbols2.13.1 Grade Symbols. Each track bolt and tracknut shall be marked in accordance with its material,mechanical, or performance requirements.2.13.2 Source Symbols. All track bolt
45、s and tracknuts shall be marked to identify the manufacturingsource using a mark registered with U.S. Patent andTrademark Office in accordance with the Fastener Qual-ity Act.TRACK BOLTS AND NUTS ASME B18.10-2006PHr1r2r3ROELLTDAVTable1OvalNeckTrackBoltsNominalDiameterandThreadsLengthFullSizeperInch,U
46、nderMinimumHeadNeckBodyD,Head,ThreadDiameter,EAHORNotesr3VLLength,(1),(2)Min.Max.Nom.Min.Max.Nom.Min.Max.r1r2Nom.Min.Max.Nom.Min.Max.PNote(3)Note(3)Note(3)l12130.4820.515780.81250.93755160.25000.37501116932580.59380.656319320.56250.6250516118Under7in.58110.6050.64215641.01561.140625640.32810.4531596
47、4236413160.78130.843825320.75000.81253812Samebysteps114bodyasof14in.34100.7290.76819321.21881.343815320.40630.5313153271611161.03131.093811321.00001.0625716diam.body134ofdiam.From7in.7890.8520.895131641.42191.546935640.48440.609412564336417321.18751.250013161.15631.218812boltofto10in.2boltbysteps180
48、.9761.022111161.62501.7500580.56250.687515819321381.34381.4063111321.31251.3750916of12in.21411871.0981.149157641.82811.953145640.64060.7656155644364117321.50001.56251121.46881.531358212GENERALNOTES:(a)Alldimensionsaregivenininches.(b)Tolerances:LengthL18in.NeckOandR132in.HeadAandH116in.NOTES: (1)Ino
49、rderingbolts,specifythenominaldiameterDoverthethreadsandnotthebodydiameter.(2)Standardsizesforindustrialuseare12,58,34,78,and1in.withheavysquarenuts.SeeTable3.(3)Appliestoallrows.3ASME B18.10-2006 TRACK BOLTS AND NUTSPHr1r2r5ROLDAVr6LTETable2EllipticNeckTrackBoltsNominalDiameterFullSizeandLengthBodyThreadsUnderMinimumHeadNeckDiameter,perInch,Head,ThreadEAHORDVLLength,Note(1)Min.Max.Nom.Min.Max.Nom.Min.Max.r1r2Nom.Min.Max.Nom.Min.Max.Pr5r6Note(2)Note(2)l34100.7290.76819321.21881.343815
