BS 436-4:1996

Committees responsible
National foreword
Introduction
Classification
1 Scope
2 Normative reference
3 Definitions
4 Symbols and abbreviations
5 Structure of the system of accuracy for gears
6 Formulae for allowable values of gear deviations of
     accuracy grade 5
7 Allowable values of gear deviations relevant to
     corresponding flanks
Annexes
A (normative) Tolerances for tangential composite deviations
B (informative) Values of profile and helix form and slope
     deviations
C (informative) Bibliography
Figures
1 Pitch deviations
2 Profile deviations
3 Helix deviations
4 Tangential composite deviations
Tables
1 Single pitch deviations
2 Total cumulative pitch deviation
3 Total profile deviation
4 Total helix deviation
A.1 Values of the quotient
B.1 Profile form deviation
B.2 Profile slope deviation
B.3 Helix form deviation and helix slope deviation

Gives an accuracy system for corresponding flanks of individual cylindrical involute gears, and defines gear tooth accuracy terms, structure of gear accuracy system and allowable values of pitch deviations, total profile deviations and total helix of deviations. Applies to each individual element of a toothed wheel but not gear pairs as such.