1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA
2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any
3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ICS 21.100.10 ISBN 0-626-16987-9 SANS 12240-3:2005Edition 1ISO 12240-3:1998Edition 1SOUTH AFRICAN NATIONAL STANDARD Spherical plain bearings Part 3: Thru
4、st spherical plain bearings This national standard is the identical implementation of ISO 12240-3:1998 and is adopted with the permission of the International Organization for Standardization. Published by Standards South Africa 1 dr lategan road groenkloof private bag x191 pretoria 0001 tel: 012 42
5、8 7911 fax: 012 344 1568 international code + 27 12 www.stansa.co.za Standards South Africa SANS 12240-3:2005 Edition 1 ISO 12240-3:1998 Edition 1 Table of changes Change No. Date Scope Abstract Specifies dimensions and tolerances for thrust spherical plain bearings. Keywords axial-thrust bearings,
6、bearings, clearances, dimensional tolerances, dimensions, enclosures, form specifications, knuckle bearings, plain bearings, rolling bearings, shafts, spherical bearings, tolerances (measurement), washers. National foreword This South African standard was approved by National Committee StanSA TC 512
7、0.02, Bearings, in accordance with procedures of Standards South Africa, in compliance with annex 3 of the WTO/TBT agreement. AReference numberISO 12240-3:1998(E)INTERNATIONALSTANDARDISO12240-3First edition1998-08-15Spherical plain bearings Part 3:Thrust spherical plain bearingsRotules lisses Partie
8、 3: Rotules lisses axialesISO 12240-3:1998(E) ISO 1998All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronicor mechanical, including photocopying and microfilm, without permission in writing from the publishe
9、r.International Organization for StandardizationCase postale 56 CH-1211 Genve 20 SwitzerlandInternet isoiso.chPrinted in SwitzerlandiiForewordISO (the International Organization for Standardization) is a worldwide federation of national standard bodies(ISO member bodies). The work of preparing Inter
10、national Standards is normally carried out through ISOtechnical committees. Each member body interested in a subject for which a technical committee has beenestablished has the right to be represented on that committee. International organizations, governmental andnon-governmental, in liaison with I
11、SO, also take part in the work. ISO collaborates closely with the InternationalElectrotechnical Commission (IEC) on all matters of electrotechnical standardization.Draft International Standards adopted by the technical committees are circulated to the member bodies forvoting. Publication as an Inter
12、national Standard requires approval by at least 75 % of the member bodies castinga vote.International Standard ISO 12240-3 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 Sph
13、erical 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 endsINTERNATIONAL STANDARD ISO ISO 12240-3:1998(E)1Spherical plain bearings Part 3:Thrust spherical plain
14、 bearings1 ScopeThis part of ISO 12240 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 illustrated bu
15、t compliance is required as regardsdimensions and tolerances specified.NOTE Thrust spherical plain bearings for airframe applications are not covered by this part of ISO 12240.2 Normative referencesThe following standards contain provisions which, through reference in this text, constitute provision
16、s of this partof 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 ofapplying the most recent editions of the standards indicated belo
17、w. Members of IEC and ISO maintain registers ofcurrently valid International Standards.ISO 582 : 1995, Rolling bearings Chamfer dimensions Maximum values.ISO 1132-1: 1), Rolling bearings Tolerances Part 1: Terms and definitions.ISO 6811:1998, Spherical plain bearings Vocabulary.3 Definitions and sym
18、bolsFor 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 dimensionsunless specified otherwise.B Shaft washer heightC Housing washer heightD Outs
19、ide diameterD1Bore diameter of housing washerd Bore diameter1) To be published. (Revision of ISO 1132:1980)ISO 12240-3:1998(E) ISO2d1Outside diameter of shaft washerd2Diameter of plain back face of shaft washerdkSphere diameterrs min2) Smallest single chamfer dimension, inner ringr1s min2) Smallest
20、single chamfer dimension, outer rings Distance between sphere diameter centre and shaft washer back faceT Bearing heightVDmpVariation of mean outside diameterVdmpVariation of mean bore diameterVDpVariation of outside diameter in a single radial planeVdpVariation of bore diameter in a single radial p
21、laneDBsDeviation of a single shaft washer heightDCsDeviation of a single housing washer heightDDmpDeviation of mean outside diameter in a single planeDdmpDeviation of mean bore diameter in a single planeDTsDeviation of the actual bearing height4 Dimensions and tolerances4.1 DimensionsSee figure 1 an
22、d table 1.Figure 1 Thrust spherical plain bearing2) The corresponding maximum chamfer dimensions are given in table 5 of ISO 582:1995.ISOISO 12240-3:1998(E)3Table 1 Dimensions for thrust spherical plain bearingsDimensions in millimetresdDBCTdk1)sd1d22)D1rs, r1smax. max. min. max. min.10 30 8 7 9,5 3
23、2 7 27 21 17 0,612 35 10 10 13 38 8 31,5 24 20 0,615 42 11 11 15 46 10 38,5 29 24,5 0,617 47 12 12 16 51 11 43 34 28,5 0,620 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 21 28 98 22 83,5 66 52,5 1 40 105 27 22 32 114 24,5 96 78 59,
24、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 1 120 230 54 50 64 248 52,5 213 170 155 1 140 260 61 54 72 274 52,5
25、 243 198 177 1,5160 290 66 58 77 313 65 271 213 200 1,5180 320 74 62 86 340 67,5 299 240 225 1,5200 340 80 66 87 365 70 320 265 247 1,51) Reference only.2) At manufacturers discretion.ISO 12240-3:1998(E) ISO44.2 TolerancesSee tables 2 and 3.Table 2 Tolerances for shaft washer and bearing heightd dmp
26、VdpVdmpBsTsmm mm mm mm mm mmover including high low max. max. high low high low2,5 18 0 8 8 6 0 240 +250 40018 30 0 10 10 8 0 240 +250 40030 50 0 12 12 9 0 240 +250 40050 80 0 15 15 11 0 300 +250 50080 120 0 20 20 15 0 400 +250 600120 180 0 25 25 19 0 500 +350 700180 200 0 30 30 23 0 600 +350 800Tab
27、le 3 Tolerances for housing washerD DmpVDpVDmpCsmm mm mm mm mmover including high low max. max. high low18 30 0 9 12 7 0 24030 50 0 11 15 8 0 24050 80 0 13 17 10 0 30080 120 0 15 20 11 0 400120 150 0 18 24 14 0 500150 180 0 25 33 19 0 500180 250 0 30 40 23 0 600250 315 0 35 47 26 0 700315 400 0 40 53 30 0 800 Standards South AfricaThis s tandard may only be used and printed by approved subscription and freemailing clients of the SABS .
