ANSI B5.26

Description / Abstract: DEFINITION AND SCOPE. involute serrations are multiple keys in the general form of internal and external involute gear teeth, as used for permanent fits between shafts and parts mounted there on. The purpose of this standard is to provide a uniform easily fabricated set of serrations that can be made by several manufacturing processes. The pitches include are 10/20, 16/32, 24/48, 32/64, 40/80, 48/96, 64/128, 80/160, and 128/256, complete from 6 to 100 teeth only for the first three. The scope is from 0.10 diameters to 10.00 diameters.