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General tolerances - Part 1: Tolerances for linear and angular dimensions without individual tolerance indications

Executive summary

General tolerances for linear and angular dimensions without individual tolerance indications.

Abstract

This part of EN 22768 is intended to simplify drawing indications and it specifies general tolerances for linear and angular dimensions without individual tolerance indications in four tolerance classes.

This European Standard applies to the dimensions of parts that are produced by metal removal or parts that are formed from sheet metal.

This standard only applies to the following dimensions which do not have an individual tolerance indication:

a) linear dimensions (e.g. 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. right angles (90 degrees), unless reference to ISO 2768-2 is made, or angles of uniform polygons;

c) linear and angular dimensions produced by machining assembled parts.

This standard does not apply to the following dimensions:

- linear and angular dimensions which are covered by reference to other standards on general tolerances;

- auxiliary dimensions indicated in brackets;

- theoretically exact dimensions indicated in rectangular frames.

History and related standards

This European Standard supersedes BS 4500-3:1973, which is withdrawn.

This European Standard includes the following cross references:

ISO 2768-2:1989, ISO 8015:1985.

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