Patent ID: 7356895

Claim:
A machine tool comprising: a table provided free to swivel about a horizontal swivel center axis, said table provided with a table body for carrying a workpiece, and disposed with its axis coaxial with the swivel center axis, to provide the table free to rotate about its axial center, and having a rotary shaft a first end of which is affixed to said table body; a support structure rotatably supporting said rotary shaft via a bearing; a swivel drive mechanism for rotating said rotary shaft about its axial center to index said table body to a predetermined swivel angle position; a main spindle, for holding a tool, provided free to rotate centered on its own center axis; a rotational drive mechanism for rotating said main spindle with its center axis as center; feed mechanisms for shifting said support structure and said main spindle relative to each other; a riding member abutting on an outer-peripheral locus along a second end of said rotary shaft, off a bearing-supported portion of said rotary shaft; and a hold-down mechanism arranged on said support structure, for supporting said riding member and for pressing on the outer-peripheral locus from above by means of said riding member to apply a load to the outer-peripheral locus.