ISO INTERNATIONAL STANDARD 12240-1 First edition 1998-08-15 Spherical plain bearings - Part 1: Radial spherical plain bearings Rotules lisses Partie 1: Rotules lisses radiales ISO Reference number ISO 12240-1:1998(E) by IHS under lic itted without license from IHS Not for Resale ISO 12240-1:1998(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 non-governmental, in liaison with Iso, also take part in the work. Iso collaborates closely with the International ElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization. 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/T 4, Rolling bearings, Subcommittee S 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:Angularcontact radial sphericalplainbearings Part 3: Thrust spherical plain bearings Part 4: Spherical plain bearing rod ends @ISO1998 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. InternationalOrganizationforStandardizatior Case postale 56. CH-1211 Geneve 20 · Switzerland Internet [email protected] Printed in Switzerland Not for Resale ISO 12240-1:1998(E) INTERNATIONAL STANDARD @ISO Spherical plain bearings Part 1: Radial spherical plain bearings 1 Scope This part of isO 12240 specifies dimension series, tolerances and radial internal clearances for radial spherical plain bearings. The dimensions and tolerances specified in this part of IsO 12240 have been selected to permit the design of radial spherical plain bearings using a wide choice of sliding material combinations. The specified tolerance values apply to finished, radial spherical plain bearings before any coating, plating, ring splitting or ring fracturing. tolerance values. Radial spherical plain bearings need not conform to the designs illustrated but compliance is required as regards the dimensions, tolerances and radial internal clearances specified. NOTE - 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 applying the most recent editions of the standards indicated below. Members of IEC and IsO maintain registers of currently valid International Standards. IS0 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. ISo 12240-4:1998, Spherical plain bearings - Part 4: Spherical plain bearing rod ends. 1) To be published. (Revision of ISO 1132:1980) Copyright Interni onal Organization for Standardization Not for Resale