This part of DS/ISO 2768 aims to simplify the drawing specifications, and it specifies general tolerances for linear dimensions and angular dimensions without tolerance specification in four tolerance classes. NOTE 1 - The concepts underlying the general tolerance statement of linear dimensions and angular dimensions are described in annex A. DS/ISO 2768 is used for dimensions on items produced by chip removal or on items removed from sheet metal . NOTES 2 The tolerances may be suitable for materials other than metal. 3 Other corresponding international standards exist, eg ISO 8062 1' for castings, or are planned. This part of DS/ISO 2768 only applies to the following measurements, for which no individual tolerance specification is specified: a) linear measurements (e.g. external measurements, internal measurements, step measurements, diameters, radii, distances, external radii (roundings ) and rib heights for broken edges); b) angle measurements, including angle measurements that are not normally stated, e.g. right angles (90°) - unless there is a reference to DS/ISO 2768-2 - or angles in equilateral (right-angled) polygons; c) linear dimensions or angular dimensions resulting from machining of assembled parts. This part of DS/ISO 2768 does not apply to the following measures: a) linear measures and angular measures, which are referred to in other international standards on general tolerances, e.g. ISO 8062 D, DS 326; b) auxiliary dimensions given in brackets (DS/ISO 129); c) theoretically correct dimensions, which are indicated in square brackets (DS/ISO 1101).
DS/EN 22768-1:1993 history
1993DS/EN 22768-1:1993 General tolerances. Part 1: Tolerances for linear and angular dimensions without individual tolerance indications