Thereby nearly the same technological benefits, already known on the ULTRASONIC grinding, can be achieved for effective drilling and milling machining e.g. of engine components made from hardened steel or also turbine blades made from Inconel, titanium or composites. The new ULTRASONIC HSK tool holder is designed more rigidly and enables the generation of increased amplitudes of > 10 µm, which from now on allows the application of tools with defined cutting edges.