The machining of the gear needs to provide the most elementary modulus m, the amount 
of gears Z, and the pressure angle a. Gear thickness h.
Gear processing strategies generally include hobbing, equipment shaping, and milling gears, in addition to grinding teeth with high precision requirements. Corresponding devices and knives possess hobbing and hobbing cutters, equipment shaping machines and gear shaping knives, horizontal milling devices and equipment milling cutters, equipment grinding machines and equipment grinding wheels. Coupling details the following:
(1) Hobbing machine hobbing: It could process helical teeth below 8 modules
(2) Milling machine milling: can process straight rack
(3) Inserting teeth: may process internal teeth
(4) cold punching machine: can be processed without debris
(5) planing machine planing teeth: can process 16 modulus large gears
(6) Precision casting tooth: can procedure cheap pinions in large quantities
(7) Grinding machine grinding teeth: can procedure gears on precision machine
(8) Die casting machine casting tooth: most processing nonferrous metal gears
(9) Shaving machine: It is some sort of metal cutting for equipment finishing