Specification for fine pitch gears.. Involute spur and helical gears.
NORMA vydaná dňa 31.1.1968
Označenie normy: BS 978-1:1968
Dátum vydania normy: 31.1.1968
Počet strán: 36
Približná hmotnosť: 108 g (0.24 libier)
Krajina: Britská technická norma
Kategória: Technické normy BS
Gears of pitch range greater than 20, up to 200 diametral pitch. Standard pitches; two basic racks (one with backlash allowance); modification of addendum and centre distance to suit various conditions. Four grades of accuracy with elemental and dual flank composite test tolerances. Appendices: single flank testing, calculation of measuring pin dimensions, calculations for various design conditions. Status: Confirmed