http://www.longwinprecision.co....m/cnc-lathe-parts/me should be selected according to different accuracy levels and surface roughness requirements. There are four basic processing paths. One is the processing route from rough turning to semi-finish machining to fine turning, which is also the main processing route of the pin shaft of the most commonly used material for external processing; The other is the processing path from rough turning to semi-finish and then to rough grinding. Then finish grinding. For ferrous metal materials and parts with high precision requirements, surface roughness requirements are low and quenching is required, so this treatment method is not applicable. The third machining path involves rough turning, semi-finishing, and finishing. This processing route is solely for non-ferrous materials. Because nonferrous metals have a low hardness, it is easier to seal the spaces between the sand grains. To achieve the desired surface roughness, finishing and diamond turning processes must be used, the latter with a machining path that includes rough turning, semi-finishing, rough grinding, fine grinding, and