1、BRITISH STANDARD BS ISO 12240-3:1998 Spherical plain bearings Part 3: Thrust spherical plain bearings ICS 21.100.10BSISO12240-3:1998 This British Standard, having been prepared under the directionof the Engineering SectorCommittee, was publishedunder the authority ofthe Standards Committeeandcomes i
2、nto effect on 15 November1998 BSI 06-1999 ISBN 0 580 30792 1 National foreword This British Standard reproduces verbatim ISO12240-3:1998 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee MCE/7, Rolling bearings, which has the
3、responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK
4、. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “Inte
5、rnational Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a
6、 British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, theISO title page, pages ii toiv, pages1 to3 and a back cover. This standard has been updated (see copyright date) and may have
7、had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSISO12240-3:1998 BSI 06-1999 i Contents Page National foreword Inside front cover Foreword iii Text of ISO 12240-3 1ii blankBSISO12240-3:19
8、98 ii BSI06-1999 Contents Page Foreword iii 1 Scope 1 2 Normative references 1 3 Definitions and symbols 1 4 Dimensions and tolerances 2 Figure 1 Thrust spherical plain bearing 2 Table 1 Dimensions for thrust spherical plain bearings 2 Table 2 Tolerances for shaft washer and bearing height 3 Table 3
9、 Tolerances for housing washer 3BSISO12240-3:1998 BSI 06-1999 iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standard bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical c
10、ommittees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with t
11、he International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least75% of the me
12、mber bodies casting a vote. International Standard ISO12240-3 was prepared by Technical Committee ISO/TC 4, Rolling bearings, Subcommittee SC7, Spherical plain bearings. ISO12240 consists of the following parts, under the general title Spherical plain bearings: Part 1: Radial spherical plain bearing
13、s; Part 2: Angular contact radial spherical plain bearings; Part 3: Thrust spherical plain bearings; Part 4: Spherical plain bearing rod ends. Descriptors: Bearings, plain bearings, spherical bearings, radial bearings, form specifications, dimensions, dimensional tolerances.iv blankBSISO12240-3:1998
14、 BSI 06-1999 1 1 Scope This part of ISO12240 specifies dimensions and tolerances for thrust spherical plain bearings. The specified tolerance values apply to finished, thrust spherical plain bearings before any coating or plating. Thrust spherical plain bearings need not conform to the design illust
15、rated but compliance is required as regards dimensions and tolerances specified. NOTEThrust spherical plain bearings for airframe applications are not covered by this part of ISO12240. 2 Normative references The following standards contain provisions which, through reference in this text, constitute
16、 provisions of this part of ISO12240. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO12240 are encouraged to investigate the possibility of applying the most recent editions of the standards ind
17、icated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO582:1995, Rolling bearings Chamfer dimensions Maximum values. ISO1132-1:, Rolling bearings Tolerances Part1: Terms and definitions 1) . ISO6811:1998, Spherical plain bearings Vocabulary. 3 Definiti
18、ons and symbols For the purposes of this part of ISO12240, the definitions given in ISO1132-1 and ISO6811 apply. The symbols (except those for tolerances) shown in Figure 1 and the values given in the tables denote nominal dimensions unless specified otherwise. 1) To be published. (Revision of ISO11
19、32:1980) B Shaft washer height C Housing washer height D Outside diameter D 1 Bore diameter of housing washer d Bore diameter d 1 Outside diameter of shaft washer d 2 Diameter of plain back face of shaft washer d k Sphere diameter r s min a Smallest single chamfer dimension, inner ring r 1s min a Sm
20、allest single chamfer dimension, outer ring s Distance between sphere diameter centre and shaft washer back face T Bearing height V Dmp Variation of mean outside diameter V dmp Variation of mean bore diameter V Dp Variation of outside diameter in a single radial plane V dp Variation of bore diameter
21、 in a single radial plane Bs Deviation of a single shaft washer height Cs Deviation of a single housing washer height Dmp Deviation of mean outside diameter in a single plane dmp Deviation of mean bore diameter in a single plane Ts Deviation of the actual bearing height a The corresponding maximum c
22、hamfer dimensions are given in Table5 of ISO582:1995.BSISO12240-3:1998 2 BSI 06-1999 4 Dimensions and tolerances 4.1 Dimensions See Figure 1 and Table 1. Table 1 Dimensions for thrust spherical plain bearings Figure 1 Thrust spherical plain bearing Dimensions in millimetres d D B C T d k a s d 1d 2
23、bD 1r s , r 1smax. max. . min. . max. min. 10 30 8 7 9,5 32 7 27 21 17 0,6 12 35 10 10 13 38 8 31,5 24 20 0,6 15 42 11 11 15 46 10 38,5 29 24,5 0,6 17 47 12 12 16 51 11 43 34 28,5 0,6 20 55 15 14 20 60 12,5 49,5 40 34 1 25 62 17 17 22,5 67 14 57 45 35 1 30 75 19 20 26 81 17,5 68,5 56 44,5 1 35 90 22
24、 21 28 98 22 83,5 66 52,5 1 40 105 27 22 32 114 24,5 96 78 59,5 1 45 120 31 26 36,5 129 27,5 109 89 68,5 1 50 130 34 32 42,5 140 30 119 98 71 1 60 150 37 34 45 160 35 139 109 86,5 1 70 160 42 37 50 173 35 149 121 95,5 1 80 180 44 38 50 196 42,5 167 135 109 1 100 210 51 46 59 221 45 194 155 134 1 120
25、 230 54 50 64 248 52,5 213 170 155 1 140 260 61 54 72 274 52,5 243 198 177 1,5 160 290 66 58 77 313 65 271 213 200 1,5 180 320 74 62 86 340 67,5 299 240 225 1,5 200 340 80 66 87 365 70 320 265 247 1,5 a Reference only. b At manufacturers discretion.BSISO12240-3:1998 BSI 06-1999 3 4.2 Tolerances See
26、Table 2 and Table 3. Table 2 Tolerances for shaft washer and bearing height Table 3 Tolerances for housing washer d dmp V dp V dmp Bs Ts mm 4m 4m 4m 4m 4m over including high low max. max. high low high low 2,5 18 0 8 8 6 0 240 +250 400 18 30 0 10 10 8 0 240 +250 400 30 50 0 12 12 9 0 240 +250 400 5
27、0 80 0 15 15 11 0 300 +250 500 80 120 0 20 20 15 0 400 +250 600 120 180 0 25 25 19 0 500 +350 700 180 200 0 30 30 23 0 600 +350 800 D Dmp V Dp V Dmp Cs mm 4m 4m 4m 4m over including high low max. max. high low 18 30 0 9 12 7 0 240 30 50 0 11 15 8 0 240 50 80 0 13 17 10 0 300 80 120 0 15 20 11 0 400
28、120 150 0 18 24 14 0 500 150 180 0 25 33 19 0 500 180 250 0 30 40 23 0 600 250 315 0 35 47 26 0 700 315 400 0 40 53 30 0 800BS ISO 12240-3:1998 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It
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