extremely small the tilting rotary table device of the present invention is suitable for continuous machining of a workpiece under varying inclinations of the tilting rotary table particularly since the worm shaft can be rotated and kept at a uniform speed with a small torque even with under varying loads working on the worm gearing during machining automatic program control machining can be attained still further the tilting rotary table device of the present invention is capable of not only firm and reliable clamping of the tilting rotary table merely by operating the clamping control valve of the hydraulic clamping system but also sequential control of the tilting rotary table clamping operation fig7 shows a second embodiment of the tilting rotary table device according to the present invention a tilting rotary table 201 is inclined at an angle of u03b2 to a horizontal plane a sector worm wheel 202 is fixed to the underside of the tilting rotary table 201 by means of bolts or any other suitable means so that the tilting rotary table 201 and the sector worm wheel 202 form a single unit the tilting rotary table 201 is supported rotatably by a bearing device disposed in.