Abstract: Machine tool furnished with: a table (20) free to swivel about a horizontal swivel center axis, and having a table body (22) for carrying a workpiece, and an axially rotatable rotary shaft (23) disposed with the axis of the rotary shaft (23) coinciding with the swivel center axis, with a first end of the rotary shaft affixed to the table body (22); a support structure (15) for supporting rotatably the rotary shaft (23) via a bearing (15b); a swivel drive mechanism (25) for axially rotating the rotary shaft (23); riding members (31) abutting on an outer-peripheral locus on a rotary shaft (23) second end, off a portion, supported by the bearing (15b), of the rotary shaft (23); and hold-down mechanisms (32) arranged on the support structure (15), for supporting the riding members (31) and thereby pressing on and apply a load to the rotary shaft (23) outer-peripheral locus from above.

Abstract: Machine tool simplifying maintenance, reducing manufacturing costs, and enabling high precision machining. The machine tool is equipped with: a bed furnished with a rectangular base, right and left sidewalls provided standing either side of the base, and a rear sidewall provided standing along the back of the base; a table disposed in the space surrounded by the three sidewalls; a first saddle shaped in the form of a rectangular frame shape, provided free to shift back and forth supported on the tops of the left and right sidewalls; a second saddle penetrated by a perpendicular through-hole and arranged free to shift sideways inside the first saddle frame; and a spindle head arranged free to shift perpendicularly inside the through-hole in the second saddle; and a main spindle arranged over the table and supported by the spindle head free to rotate centered on its axis.