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

Status : Current, Confirmed   Published : January 1968



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.

Standard NumberBS 978-1:1968
TitleSpecification for fine pitch gears. Involute spur and helical gears
StatusCurrent, Confirmed
Publication Date31 January 1968
Confirm Date01 June 2016
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
Amended ByAMD 3305
Draft Superseded By66/14936 DC
DescriptorsGear drives, Spur gears, Helical gears, Gear parameters, Tooth profiles, Dimensions, Dimensional tolerances, Gear wheels, Gear pairs, Accuracy, Imperial system, Clock movements, Basic racks, Time-measuring instrument components, Instruments, Blanks, Grades (quality), Mathematical calculations
Title in FrenchEngrenages a pas fin. Specification. Engrenages en developpante a denture droite et helicoidale
Title in GermanFeine Zahnraeder. Spezifikation. Evolventen-Stirn- und Schraegzahnraeder
ISBN0 580 00028 1
File Size1.095 MB

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