finishing
The main consideration in finish machining is the surface quality of the workpiece rather than the amount of chips. A small depth of cut is usually used for finishing. The secondary cutting edge of the tool often has a special shape, such as a wiper. According to the machine tool, cutting method, workpiece material and the tool used, the surface roughness can reach the level of Ra1.6μm, even under excellent conditions, it can reach Ra0.4μm.
The amount of wear on the tool flank during finishing is no longer the main criterion, it will give the surface quality of the workpiece