PURPOSE: To constitute a small and inexpensive device to perform various precise machine works on a comparatively small part.

CONSTITUTION: Chuck holes 1a in two rows are formed in its circumferential direction on a rotary table 1, and a megatorque motor 2 is rotatably pivoted by placing this rotary table 1. An annular ring disk 1b is fixed to a circumferential part lower surface of the rotary table 1, and the megatorque motor 2 is placed on a stand 2a. A pneumatic caliper 3 is supported by a bracket 3a, and dampers 3d and 3e are arranged on its arms 3b and 3c, and braking is applied when the rotary table 1 is positioned. Various machine work machines are arranged in a prescribed position of its external part along the outer periphery of the rotary table 1.