BS 978-2:Addendum No. 1:1959
Current
The latest, up-to-date edition.
Gears for instruments and clockwork mechanisms. Cycloidal type gears. Double circular arc type gears
Hardcopy , PDF
English
15-05-1959
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Basic rack tooth shape and modules from 0.150 mm to 0.700 mm inclusive. Limits of tolerance for tip diameter, pitch, tooth thickness, profile, axial and radial run-out and centre distance; cutters for pinions with from six to twelve teeth.
| Committee |
MCE/5
|
| DevelopmentNote |
Reviewed and confirmed by BSI, January 2011. (12/2010)
|
| DocumentType |
Standard
|
| Pages |
8
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
This specification relates to spur and helical gears with pitches of 0.15 to 0.7 mm module inclusive, the basic rack of the system having a normal tooth profile composed of two circular arcs.
| BS 978-1:1968 | Specification for fine pitch gears. Involute spur and helical gears |
| BS 2519:1954 | Glossary of terms and notation for toothed gearing. |
| BS 978-2:1952 | Specification for fine pitch gears Cycloidal type gears |
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