The demands placed on transmissions and their components in the automotive industry are increasing all the time. Lower noise emissions, greater running smoothness, longer service life and higher torques, as well as reduced dimensions and weights are some of the main challenges here. In order to meet these requirements it is increasingly necessary to subject gears to hard finishing after hardening. The hard finishing process is of critical importance for the realization of an optimum tooth geometry and surface quality. Gear grinding and gear honing are now among the most important machining processes.