A Reference number ISO 12240 3 1998(E) INTERNATIONAL STANDARD ISO 12240 3 First edition 1998 08 15 Spherical plain bearings — Part 3 Thrust spherical plain bearings Rotules lisses — Partie 3 Rotules l[.]
INTERNATIONAL STANDARD ISO 12240-3 First edition 1998-08-15 Spherical plain bearings — Part 3: Thrust spherical plain bearings Rotules lisses — Partie 3: Rotules lisses axiales A Reference number ISO 12240-3:1998(E) 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 12240-1 was prepared by Technical Committee ISO/TC 4, Rolling bearings, Subcommittee SC 7, Spherical plain bearings This first edition cancels and replaces ISO 6124-1:1987, ISO 6124-2:1982, ISO 6124-3:1982 and ISO 6125:1982 of which it constitutes a technical revision 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 © ISO 1998 All rights reserved Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher International Organization for Standardization Case postale 56 • CH-1211 Genève 20 • Switzerland Internet iso@iso.ch Printed in Switzerland ii ISO 12240-3:1998 Contents Foreword Scope Normative references Definitions and symbols Dimensions and tolerances Figure — Thrust spherical plain bearing Table — Dimensions for thrust spherical plain bearings Table — Tolerances for shaft washer and bearing height Table — Tolerances for housing washer ii Page iii 1 2 3 © BSI 06-1999 BS ISO 12240-3:1998 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 12240-3 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 titleSpherical 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 iii iv blank ISO 12240-3:1998 Scope This 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 but compliance is required as regards dimensions and tolerances specified NOTE Thrust spherical plain bearings for airframe applications are not covered by this part of ISO 12240 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 IS O 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 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 and the values given in the tables denote nominal dimensions unless specified otherwise Shaft washer height B Housing washer height C Outside diameter D D1 Bore diameter of housing washer d Bore diameter Outside diameter of shaft washer d1 Diameter of plain back face of shaft washer d2 Sphere diameter dk rs a Smallest single chamfer dimension, inner ring r1s mina Smallest single chamfer dimension, outer ring s Distance between sphere diameter centre and shaft washer back face Bearing height T VDmp Vdmp Variation of mean outside diameter Variation of mean bore diameter VDp Variation of outside diameter in a single radial plane Vdp Variation of bore diameter in a single radial plane ¹Bs Deviation of a single shaft washer height ¹Cs Deviation of a single housing washer height ¹Dmp Deviation of mean outside diameter in a single plane ¹dmp Deviation of mean bore diameter in a single plane ¹Ts a Deviation of the actual bearing height The corresponding maximum chamfer dimensions are given in Table of ISO 582:1995 1) To be published (Revision of ISO 1132:1980) ISO 12240-3:1998 Dimensions and tolerances 4.1 Dimensions See Figure and Table Figure — Thrust spherical plain bearing Table — Dimensions for thrust spherical plain bearings Dimensions in millimetres d 10 12 15 17 20 25 30 35 40 45 50 60 70 80 100 120 140 160 180 200 D 30 35 42 47 55 62 75 90 105 120 130 150 160 180 210 230 260 290 320 340 a Reference b B C max max 10 11 12 15 17 19 22 27 31 34 37 42 44 51 54 61 66 74 80 10 11 12 14 17 20 21 22 26 32 34 37 38 46 50 54 58 62 66 only At manufacturer’s discretion dka T 9,5 13 15 16 20 22,5 26 28 32 36,5 42,5 45 50 50 59 64 72 77 86 87 32 38 46 51 60 67 81 98 114 129 140 160 173 196 221 248 274 313 340 365 s d1 d2b D1 rs, r1s max 10 11 12,5 14 17,5 22 24,5 27,5 30 35 35 42,5 45 52,5 52,5 65 67,5 70 27 31,5 38,5 43 49,5 57 68,5 83,5 96 109 119 139 149 167 194 213 243 271 299 320 21 24 29 34 40 45 56 66 78 89 98 109 121 135 155 170 198 213 240 265 17 20 24,5 28,5 34 35 44,5 52,5 59,5 68,5 71 86,5 95,5 109 134 155 177 200 225 247 0,6 0,6 0,6 0,6 1 1 1 1 1 1 1,5 1,5 1,5 1,5 ISO 12240-3:1998 4.2 Tolerances See Table and Table Table — Tolerances for shaft washer and bearing height d mm over 2,5 Vdp ¹dmp 4m including high low Vdmp 4m 4m max max ¹Bs ¹Ts 4m high 4m low high low 18 – 8 – 240 + 250 – 400 18 30 – 10 10 – 240 + 250 – 400 30 50 – 12 12 – 240 + 250 – 400 50 80 – 15 15 11 – 300 + 250 – 500 80 120 – 20 20 15 – 400 + 250 – 600 120 180 – 25 25 19 – 500 + 350 – 700 180 200 – 30 30 23 – 600 + 350 – 800 Table — Tolerances for housing washer over D ¹Dmp VDp VDmp ¹Cs mm 4m 4m 4m 4m max max including high low high low 18 30 – 12 – 240 30 50 – 11 15 – 240 50 80 – 13 17 10 – 300 80 120 – 15 20 11 – 400 120 150 – 18 24 14 – 500 150 180 – 25 33 19 – 500 180 250 – 30 40 23 – 600 250 315 – 35 47 26 – 700 315 400 – 40 53 30 – 800