Shaft parts in a variety of mechanical equipment to transfer torque and bear the role of loading, so its size and accuracy requirements are very high. Usually shaft parts from blank to finished products need to go through a variety of processes, but also need to use a variety of processing equipment.

The main machining surface of shaft parts is the outer surface and the common special-shaped surface. Therefore, more suitable machining methods should be selected according to various precision grades and surface roughness requirements. The basic processing technology can be summarized into four kinds. The first is from coarse car to semi-fine car, and then to fine car processing technology. This kind of processing technology is very suitable for step shaft and hollow shaft and other shaft parts of the cylindrical processing of the selection of important technology.

The second processing route is the first coarse car to semi-fine car, and then to rough grinding, after the use of fine grinding processing technology. This machining route is a better choice for ferrous metal materials, high precision requirements, small surface roughness requirements and hardening requirements for shaft parts, because fine grinding is an ideal follow-up process for shaft parts.