At the time of publication, the editions indicated were valid. The following standards contain provisions which, through reference in this text, constitute provisions of this part of IS0 2768. IS0 8015 : 1985, Technical cing principle.Īuxiliary dimensions indicated in brackets exact dimensions indicated in rectangular IS0 2768-2 : 1989, General tolerances - Part 2: Geometrical tolerances for features without individual tolerance indications. right angles KHY’), unless reference to IS0 2768-2 is made, or angles of uniform polygons c) linear and angular dimensions produced by machining assembled parts. external sizes, internal sizes, step sizes, diameters, radii, distances, external radii and chamfer heights for broken edges) b) angular dimensions, including angular dimensions usually not indicated, e.g. NOTES 2 These tolerances may be suitable for use with materials other than metal.Ī) linear dimensions (e.g. This part of IS0 2768 only applies for the following dimensions which do not have an individual tolerance indication : of cast or forged parts, for which no individual tolerance is directly indicated, the larger of the two general tolerances in question applies, e.g. For a dimension between an unfinished and a finished surface, e.g. If there are general tolerances for other processes, as specified in other International Standards, reference shall be made to them on the drawings or associated specifications. General tolerances for linear and angular dimensions apply when drawings or associated specifications refer to this part of IS0 2768 in accordance with clauses 4 and 5. If smaller tolerances are required or larger tolerances are permissible and more economical for any individual feature, such tolerances should be indicated adjacent to the relevant nominal dimension(s).ģ Parallel International Standards exist or are planned, e.g. When selecting the tolerance class, the respective customary workshop accuracy has to be taken into consideration. NOTE 1 - The concepts behind the general tolerancing of linear and angular dimensions are described in annex A. This part of IS0 2766 is intended to simplify drawing indications and it specifies general tolerances for linear and angular dimensions without individual tolerance indications in four tolerance classes. Part 1: Tolerances for linear and angular dimensions tolerance indications 1 The use of general tolerances for size and geometry simplifies the task of ensuring that this prerequisite is met. nothing shall be implied or left to judgement in the workshop or in the inspection department. The tolerancing on the drawing should be complete to ensure that the elements of size and geometry of all features are controlled, i.e. For the deviation of size and for the deviations of the geometrical characteristics (form, orientation and location) the function of the part requires limitations which, when exceeded, impair this function. Introduction All features on component parts always have a size and a geometrical shape. Ii COPYRIGHT 2003 International Organization for Standardization International Organization for Standardization Case postale 56 l CH-1211 Geneve 20 l Switzerland Printed in Switzerland 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. Parts, under the general title General tolerances :Īnnex A of this part of IS0 2768 is for information With IS0 2769-2 : 1999, cancel and replace They are approved in accordance with IS0 procedures requiring at least 75 % approval by the member bodies voting. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the IS0 Council. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. The work of preparing International Standards is normally carried out through IS0 technical committees. Partie 1 : Tolhrances pour tolhances individuellesĬOPYRIGHT 2003 International Organization for Standardizationĭocument provided by IHS Licensee=Deere & Co/9999663100, User=, 00:02:20 MST Questions or comments about this message: please call the Document Policy Management Group at 1-80.įoreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). Part 1: Tolerances for linear and angular individual tolerance indications
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