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. 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 Genera/ tolerances: linearĪnnexes A and B of this part of IS0 2768 are for informationĪll rights reserved. They are approved in accordance with IS0 procedures requiring at least 75 % approval by the member bodies voting.
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#ISO 2768 MK DIAMETER TOLERANCE ISO#
If general tolerances in accordance with ISO 2768 shall apply, the information shall be indicated in or near the title block, such as ISO 2768-m.Part 2: Geometrical tolerances tolerance indications Tolkrances
General tolerances specified in angular units control only the general orientation of lines or line elements of surfaces, but not their form deviations.ĥ. Smaller or larger tolerances should be indicated adjacent to the relevant nominal dimensions.Ĥ. When selecting the tolerance class, the respective customary workshop accuracy has to be taken into consideration.ģ. These tolerances may be suitable for use with materials other than metal.Ģ.
It does not apply for the following dimensions:Ī) linear and angular dimensions which are covered by reference to other standards on general tolerances ī) auxiliary dimensions indicated in brackets Ĭ) theoretically exact dimensions indicated in rectangular frames.ġ. unless reference to ISO 2768-2 is made, or angles of uniform polygons Ĭ) 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) ī) angular dimensions, including angular dimensions usually not indicated, e.g.
ISO 2768 Part 1 only applies to the following dimensions which do not have an individual tolerance indication:Ī) linear dimensions (e.g. It applies to the dimensions of parts that are produced by metal removal or parts that are formed with sheet metal fabrication. ISO 2768 Part 1 is intended to simplify drawing indications and it specifies general tolerances for linear and angular dimensions without individual tolerance indications in four tolerance classes.
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