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BS 978-2:1952
BS 978-2:1952 Specification for fine pitch gears. Cycloidal type gears
standard by BSI Group, 01/24/1952
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M00017940
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Full Description
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.Cross References:
BS 978:Part 1
BS 2519
Addendum No. 1 to BS 978:Part 2:1952
