Specification for fine pitch gears Bevel gears

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

24-01-1952

Publisher

British Standards Institution

Co-operating organizations
Foreword
Specification
Section one: General
1 Scope
2 Terminology and notation
Section two: Form of gear tooth
3 Form of gear tooth
4 Tooth spiral
5 Addendum and dedendum
6 Caliper settings
Section three: Permissible errors and tolerances
7 Pitch errors
8 Tooth thickness tolerance
Appendix
Notation
Chart
1 Interference factor (Q) for bevel gears

Form, proportions of machine cut conical gears connecting intersecting shafts in pitch range 20 to 80 D.P. Straight or curved teeth with normal pressure angle 20 at pitch cone. Addendum modification, permissible errors and tolerances for Class A, Class B gears.

This part applies to machine cut conical gears, of the classes described below, connecting intersecting shafts and having pitches from 20 to 80 DP. The teeth shall have a normal pressure angle of 20° at the pitch cone and they may be straight or curved (see Figure 1 to Figure 4). The standard provides for Class A gears for use where a high degree of accuracy is required, and Class B gears for other applications. For integrating electricity meters the particular form of gear herein specified is not necessary and it is recognised that other existing forms of gear will continue to be used.

Committee	MCE/5
DevelopmentNote	Reviewed and confirmed by BSI, January 2011. (12/2010)
DocumentType	Standard
Pages	12
PublisherName	British Standards Institution
Status	Current

BS 978-5:1965	Specification for fine pitch gears Hobs and cutters
BS 436-1:1967	Spur and helical gears Basic rack form, pitches and accuracy (diametral pitch series)
BS 978-1:1968	Specification for fine pitch gears. Involute spur and helical gears

BS 545:1949	Bevel gears (machine cut)
BS 2519:1954	Glossary of terms and notation for toothed gearing.
BS 721-1:1963	Specification for worm gearing Imperial units
BS 721-2:1983	Specification for worm gearing Metric units

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BS 978-3:1952

Current

Table of Contents

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Scope

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