When the tool geometry parameters require processing of stainless steel, the geometry of the cutting tool parts, should generally be the front corner, select the posterior horn aspects to consider. When selecting the rake angle, consider the volume crumbs groove, with or without chamfering and cutting edge inclination angle of plus or minus the size and other factors. Regardless of the tool, when machining stainless steel must use a larger rake angle. Increasing the tool rake angle can reduce the chip cut resistance and cleared away during the encounter. Right rear corner selection requirements are not very strict, but not too small, after the angle is too small and the surface is easy to cause serious friction, surface roughness deterioration, accelerated tool wear. And because of strong friction, enhancing the stainless steel surface hardening effect; after tool angle should also be too large, the posterior horn is too large, so that the wedge angle of the tool is reduced, reducing the strength of the cutting edge, accelerated tool wear. Typically, after the angle should be larger than the appropriate processing of ordinary carbon steel.       On the roughness of the surface portion of the requirements of the tool cutting tool cutting part to improve the surface finish of the resistance can be reduced curled chip formation and improve the durability of the tool. Compared with the processing of ordinary carbon steel, stainless steel processing should be appropriately reduced in order to reduce the amount of cutting tool wear; while also selecting the appropriate coolant in order to reduce the cutting process of cutting heat and cutting forces, extend tool life.