Tooth proportions for fine-pitch gearing are similar to those of coarse pitch gearing except in the matter of clearance. For 20 degree profile angle fine-pitch gearing, this standard provides a system of enlarged pinions which use the involute form above 5 degrees of roll. Data on 14-1/2 and 25 degree profile angle systems are included in the annexes.
ANSI/AGMA 1003-2007 history
2007ANSI/AGMA 1003-2007 Tooth Proportions for Fine-Pitch Spur and Helical Gearing