Surface polishing to avoid possible adverse effects on the performance of the tool run-in effects. Studies have shown that solid carbide tools at 10 times the initial drilling is done in a "run-in" state, and feed force almost half. Polished tool shows very good as there is no "run-in" performance. In order to ensure the performance of the tool, the surface treatment in dry cutting is absolutely necessary. But even in a traditional wet cutting through appropriate surface finish can be significantly longer tool life, the cutting is more reliable. ?

     Most of the ground surface exhibits a periodic structure with a typical grinding marks. If the coating is carried out immediately, this shape will be retained. However, the step due to the surface will affect such as edge rounding (mostly performed by sandblasting or brushing) or pretreatment coatings are required, it is necessary to grind the surface improving treatment. Correct these processes can have a beneficial effect. Would discharging chips along the chip discharge direction transversely grinding marks adversely affect, it should be smooth, to obtain a smooth surface on a macro. Such pre-treated surface may be polished again after the coating, so that a more simple and efficient.