Publishing and copyright information

The BSI copyright notice displayed in this document indicates when the document was last issued.

The following BSI references relate to the work on this standard: Committee reference TDW/4 Draft for comment 08/30177723 DC

Publication history

First published August 1941 First revision, May 1953

Second revision, May 1982

Third revision, November 2008

Summary of pages

This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 12, an inside back cover and a back cover.

Foreword

This British Standard is published by BSI and came into effect on 30 November 2008. It was prepared by Technical Committee TDW/4, Technical product realization.

Supersession

BS 969:2008 supersedes BS 969:1982, which is withdrawn.

Information about this document

This British Standard has been fully revised to bring it up to date.

The start and finish of text introduced or altered by Corrigendum No. 1 is indicated in the text by tags .

Presentational conventions

The provisions of this standard are presented in roman (i.e. upright) type. Its requirements are expressed in sentences in which the principal auxiliary verb is “shall”.

Commentary, explanation and general informative material is presented in nontes in smaller italic type, and does not constitute a normative element.

Contractual and legal considerations

This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

1 Scope

This British Standard specifies tolerances and limits for simple forms of limit gauges, such as cylindrical plain plug, ring and gap gauges, for which gauge limits have not been stipulated.

It specifies gauge tolerances for workpiece tolerances in the range between 0.009 mm and 3.200 mm and how gauge limits are related to the workpiece limits. It also specifies types of gauge according to size and minimum workpiece tolerance.

NOTE Where a workpiece tolerance is outside the range 0.009 mm to 3.200 mm, or if it is not possible to conform to Table 2 regarding type of gauge, gauge tolerance and workpiece size, direct measurement should be used.

The gauge tolerances specified are such that the size of any workpiece accepted by a gauge lies within the boundaries constituted by the workpiece limits. Furthermore, the magnitude of the gauge tolerances is consequent upon the amount of the workpiece tolerance only. A wear allowance is provided on all GO gauges, i.e. those that control the maximum material condition of the workpiece.

2 Terms and definitions

2.1 maximum material limit of size

2.2 least material limit of size

2.3 GO gauge

2.4 NOT GO gauge

2.5 workpiece tolerance

3 Gauge limits and tolerances

3.1 Gauge limits

3.2 Tolerances on gauge types

4 Hardness

5 Marking

5.1

5.2

6 Gauges in disagreement

Bibliography

BS 969:2008

Specification for limits and tolerances on plain limit gauges

Current

Published:

30 Nov 2008