Abstract
DLC coating significantly improves performance of every sliding and rotating part for industrial machine and automobile especially in resistances to seizure, pitching and wear. WC/C coating is the most suitable for gears in order to improve the performances, while there are a lot of types of DLCs available in the market. This paper explains how much WC/C coating improves performances of gears, giving know-hows of coating them like machine finishing, surface condition on the teeth before coating.
