ISO INTERNATIONAL STANDARD 286-1 Second edition 2010-04-15 Geometrical product specifications (GPS) ISO code system for tolerances onlinear sizes- Part 1: Basis of tolerances, deviations and fits Specification geometrique desproduits (GPS)-Systeme de codification/sOpourlestolerancessurlestailles lineaires- Partie 1: Base des tolerances, écarts et ajustements Reference number ISO 286-1:2010(E) @ISO2010 Not for Res ISO286-1:2010(E) PDFdisclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In acceptsnoliabilityinthisarea. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHTPROTECTEDDOCUMENT ?ISO2010 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 either isO at the address below or Iso's member body in the country of the requester. ISO copyright office Casepostale56.CH-1211Geneva20 Tel.+ 4122749 0111 Fax + 41 22 749 09 47 E-mail copyright@iso.org Web www.iso.org Published in Switzerland ISO 2010 -All rights reserved without license from IHS Not for Resale ISO286-1:2010(E) Contents Page Foreword Introductior 1 Scope 2 Normative references 3 Terms and definitions 3.1 Basic terminology 3.2 Terminologyrelatedtotolerancesanddeviations 3.3 Terminology related to fits ... 3.4 Terminology related to the Iso fit system. 4 Isocodesystemfortolerancesonlinearsizes. 4.1 Basic concepts and designations... 4.2 Designation of the tolerance class (writing rules) 13 4.3 Determination of the limitdeviations (reading rules). 14 4.4 Selectionoftoleranceclasses. 26 5 Isofitsystem 26 5.1 General 26 5.2 Generics of fits .... 27 5.3 Determination of a fit 27 AnnexA(informative)Further informationabouttheIsOsystemof limitsandfitsandformer practice... 29 AnnexB (informative)Examples of theuse ofiso286-1to determine fits and tolerance classes ... AnnexC(informative)RelationshiptotheGPSmatrixmodel... .36 Bibliography. 38 ili from IHS