Milling Machines an overview | ScienceDirect Topics
Hobbing and milling machines were used to fabricate the teeth of the PNC gears (spur, helical, bevel, and wheel) from the resulting PNC flanges and short bars. During the first attempt to produce PNC spur gears various defects appeared, such as the synthesis flanges had a perfect outer surface as far as quality and dispersion, but during the machining process .