BS-ISO-12240-2-1998.pdf

BRITISH STANDARD BS ISO 12240-2:1998 Spherical plain bearings Part 2: Angular contact radial spherical plain bearings ICS 21.100.10 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:15:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 12240-2:1998 This British Standard, having been prepared under the direction of the Engineering Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 November 1998 © BSI 06-1999 ISBN 0 580 30791 3 National foreword This British Standard reproduces verbatim ISO 12240-2:1998 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 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. 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 “International 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 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, the ISO title page, pages ii to iv, pages 1 to 3 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:15:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 12240-2:1998 © BSI 06-1999i Contents Page National foreword Inside front cover Foreword iii Text of ISO 12240-21 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:15:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:15:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:15:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 12240-2:1998 ii © BSI 06-1999 Contents Page Forewordiii 1Scope 1 2Normative references1 3Definitions and symbols1 4Dimensions and tolerances1 Figure 1 Angular contact radial spherical plain bearing, dimension series A1 Table 1 Dimensions for angular contact radial spherical plain bearings, dimension series A 2 Table 2 Tolerances for inner ring and bearing width3 Table 3 Tolerances for outer ring3 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:15:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 12240-2:1998 © BSI 06-1999iii 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 committees. 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 the 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 least 75 % of the member bodies casting a vote. International Standard ISO 12240-2 was prepared by Technical Committee ISO/TC 4, Rolling bearings, Subcommittee SC 7, Spherical plain bearings. ISO 12240 consists of the following parts, under the general title Spherical plain bearings: Part 1: Radial spherical plain bearings; 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. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:15:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:15:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 12240-2:1998 © BSI 06-19991 1 Scope This part of ISO 12240 specifies dimensions and tolerances for angular contact radial spherical plain bearings. The specified tolerance values apply to finished, angular contact radial spherical plain bearings before any coating or plating. Angular contact radial spherical plain bearings need not conform to the design illustrated but compliance is required as regards dimensions and tolerances specified. NOTEAngular contact radial spherical plain bearings for airframe applications are not covered by this part of ISO 12240. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 12240. 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 ISO 12240 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 582:1995, Rolling bearings Chamfer dimensions Maximum values. ISO 1132-1:, Rolling bearings Tolerances Part 1: Terms and definitions1). ISO 6811:1998, Spherical plain bearings Vocabulary. 3 Definitions and symbols For the purposes of this part of ISO 12240, the definitions given in ISO 1132-1 and ISO 6811 apply. The symbols (except those for tolerances) shown in Figure 1 and the values given in the tables denote nominal dimensions unless specified otherwise. 4 Dimensions and tolerances 4.1 Dimensions See Figure 1 and Table 1. 1) To be published. (Revision of ISO 1132:1980) BInner ring width COuter ring width DOutside diameter D1Bore diameter of outer ring dBore diameter d1Outside diameter of inner ring dkSphere diameter rs minaSmallest single chamfer dimension, inner ring r1s minaSmallest single chamfer dimension, outer ring sDistance between sphere diameter centre and inner ring back face TBearing width VDmpVariation of mean outside diameter VdmpVariation of mean bore diameter VDpVariation of outside diameter in a single radial plane VdpVariation of bore diameter in a single radial plane ¹BsDeviation of a single inner ring width ¹CsDeviation of a single outer ring width ¹DmpDeviation of mean outside diameter in a single plane ¹dmpDeviation of mean bore diameter in a single plane ¹TsDeviation of the actual bearing width a The corresponding maximum chamfer dimensions are given in Table 1 of ISO 582:1995. Figure 1 Angular contact radial spherical plain bearing, dimension series A Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:15:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 12240-2:1998 2 © BSI 06-1999 Table 1 Dimensions for angular contact radial spherical plain bearings, dimension series A Dimensions in millimetres dDB max. C max. Tdk a d1 . D1 max. s . rs, r1s min. 25471514154241,53210,6 28521615164746,53611 30551716175049,53721 32581716175251,54021 35621817185655,54321 40681918196160,54821 45752019206766,55431 50802019207473,56041 559023222381806351,5 609523222387866951,5 6510023222393927761,5 701102524251021018371,5 751152524251061058771,5 80125292729115113,59291,5 8513029272912111998101,5 90140323032129127104112 95145323032133131,510992 100150323132141138,5115122 105160353335149146,5120132,5 110170383638158155127142,5 120180383738169165137162,5 130200454345188184149182,5 140210454345198194162192,5 150225484648211207172203 160240514951225221183203 170260575557246242195213 180280646164260256207213 190290646264275270213263 200310706670290285230263 aReference only. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:15:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 12240-2:1998 © BSI 06-19993 4.2 Tolerances See Table 2 and Table 3. Table 2 Tolerances for inner ring and bearing width Table 3 Tolerances for outer ring d mm ¹dmp 4m Vdp 4m Vdmp 4m ¹Bs 4m ¹Ts 4m overincludinghighlowmax.max.highlowhighlow 500 121290 240+ 250 400 50800 1515110 300+ 250 500 801200 2020150 400+ 250 600 1201800 2525190 500+ 350 700 1802000 3030230 600+ 350 800 D mm ¹Dmp 4m VDp 4m VDmp 4m ¹Cs 4m overincludinghighlowmax.max.highlow 500 1414110 240 50800 1616120 300 801200 1818140 400 1201500 2020150 500 1501800 2525190 500 1802500 3030230 600 2503150 3535260 700 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 06:15:53 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 12240-2:1998 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. 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