... parts. Drilling machine parts ,boring machine parts ,sawing machine parts ,interchangeable parts gear ,bevel gear ,pump series ,overrunning clutch. 2. Made of ... Of cnc turning parts (precision parts ... , high frequency quenching, carburizing quenching and so on. 4. Surface treatment:. Galvanizing/zinc plating, ... finish, burnishing, sand-blasting and so on according to customer request. 5.oem welcomed ...