Motor-driven machine tool unit for computer numerical control machine, has storage unit which is functioned as movable bearing of rotor shaft, and expansion devices that are placed on movable bearing, at installed state

摘要

The motor-driven machine tool unit has a motor spindle (1), and rotor unit (3) having a rotor shaft which is rotated about a rotation axis. The one end region of workpiece holder (4) is arranged in bearing unit (5) and opposing end portion is arranged on a storage unit (6) for supporting the rotor shaft, at installed state. The storage unit is functioned as a movable bearing of the rotor shaft, and expansion devices are placed on the movable bearing, at installed state.