The machining of the gear needs to provide the most basic modulus m, the number of gears Z, and the 
pressure angle a. Gear thickness h.
Gear processing strategies generally include hobbing, gear shaping, and milling gears, in addition to grinding teeth with high precision requirements. Corresponding devices and knives have hobbing and hobbing cutters, gear Cast Iron shaping machines and equipment shaping knives, horizontal milling machines and gear milling cutters, equipment grinding machines and equipment grinding wheels. details as follows:
(1) Hobbing machine hobbing: It can process helical teeth below 8 modules
(2) Milling machine milling: can process straight rack
(3) Inserting teeth: may process internal teeth
(4) chilly punching machine: could be processed without debris
(5) planing machine planing teeth: can process 16 modulus large gears
(6) Precision casting teeth: can process cheap pinions in large quantities
(7) Grinding machine grinding teeth: can process gears on precision machine
(8) Die casting machine casting teeth: most processing non-ferrous metal gears
(9) Shaving machine: It really is a kind of metal cutting for gear finishing