Specification for fine pitch gears.. Involute spur and helical gears.
NORMA vydána dne 31.1.1968
Označení normy: BS 978-1:1968
Datum vydání normy: 31.1.1968
Počet stran: 36
Přibližná hmotnost: 108 g (0.24 liber)
Země: Britská technická norma
Kategorie: 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