There are three main grinding methods for centerless cylindrical grinders: pass-through, plunge-through and cut-through-through, pass-through centerless grinding. The workpiece is fed along the axis of the grinding wheel for grinding. Adjust the slight inclination of the axis of the titanium wire guide wheel to achieve axial feeding of the workpiece. Suitable for grinding slender cylindrical workpieces. Short shaft without center hole and sleeve type workpiece, etc. Cut-in centerless grinding. There is an axial positioning fulcrum on the pallet, the workpiece is supported at a certain position on the pallet, and the grinding wheel or guide wheel is cut in for grinding. It is used to grind workpieces with shoulders or bosses, cones, balls or other rotating bodies. Cut-through centerless grinding is a combination of the two. In addition, there are tangential feed grinding and feed grinding of the stepped workpiece in the axial advance and retreat. The productivity of centerless cylindrical grinder is high. It is mostly used for mass production and easy to realize automation.