ASME B94.21-1968 (R2019)

This standard covers types, sizes, tolerances, marking and nomenclature for ground, finishing type gear shaper cutters for generating involute spur and helical gears, splines, and serrations. It also covers ground, finishing type involute herringbone gear shaper cutters for generating herringbone gears. The purpose of this Standard is to provide the above information to encourage uniformity in specifications.