IS 4071 : 1986 Specification for Master Gears

1 Scope

Covers the requirements for master gears in the range of 1 to 12mm normal module and with a normal pressure angle 20�. Gears complying with the requirements of IS 2535 :1978 `Basic rack and modules of cylindrical gears for generalengineering and heavy engineering' and IS 3681 : 1966 `General planfor spur and helical gears' shall be checked by these master gears.

1.1 In addition to data for standard master gears, guidance isalso given on the following:

a) Calculation of the centre distance of a master gear (spur) intight mesh with a product gear.

b) Determination of the minimum diameter on a production gearthat will be checked by a given master gear.

c) Special master gear.