BS 978-2:1952
Current
The latest, up-to-date edition.
Specification for fine pitch gears Cycloidal type gears
Hardcopy , PDF
English
24-01-1952
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Foreword
Section one: General
1 Scope
2 Terminology and notation
3 Range of standard modules
Section two: Tooth form and proportions
4 Wheels driving pinions
5 Driven pinions
6 Wheels and pinions for trains in which the pinion may
act sometimes as the driver and sometimes as the
driven member
7 Contrate gears
Section three: Tolerances (in millimetres)
Appendices
A Notes on the derivation of cycloidal gears where the
wheel drives the pinion
B Notation
Forms and proportions of spur gears for instruments and clockwork mechanisms from 0.070 modules to 1.000 module. Provisions for contrate gears, derivation of cycloidal gears (where the wheel drives the pinions), tolerances.
| Committee |
MCE/5
|
| DocumentType |
Standard
|
| Pages |
14
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
This part applies to cycloidal type spur gears for spring or weight-driven mechanisms in which:
- the pinion is the driven member, or
- the pinion is required to act sometimes as the driver and sometimes as the driven member.
For integrating electricity meters the particular form of gear specified herein is not necessary and it is recognised that other existing forms of gear will continue to be used.
| Standards | Relationship |
| UNE-EN ISO 23062:2023 | Identical |
| BS 4582-1:1970 | Specification for fine pitch gears (metric module) Involute spur and helical gears |
| BS 978-5:1965 | Specification for fine pitch gears Hobs and cutters |
| BS 4582-2:1978 | Specification for fine pitch gears (metric module) Hobs and cutters |
| BS 436-1:1967 | Spur and helical gears Basic rack form, pitches and accuracy (diametral pitch series) |
| BS 978-2:Addendum No. 1:1959 | Gears for instruments and clockwork mechanisms. Cycloidal type gears. Double circular arc type gears |
| BS 978-1:1968 | Specification for fine pitch gears. Involute spur and helical gears |
| BS 978-1:1968 | Specification for fine pitch gears. Involute spur and helical gears |
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