Machine tool including a Z-table and processing spindle rotatably supported on a rotation arm

A machine tool comprising:

• a machine platen;
• a Z table provided on the machine platen and slidably movable only in a Z direction relative to the machine platen, the Z direction forming one direction in a horizontal plane;
• a supporting body disposed on the Z table and which is slidably movable only in a vertical direction relative to the Z table, the supporting body having a front surface side disposed to face a workpiece;
• a rotation arm rotatably supported on the front surface side of the supporting body, the rotation arm rotatable 360 degrees about a horizontal rotation arm axis that extends in the Z direction;
• an arm drive source for rotating the rotation arm;
• a processing spindle rotatably supported on the rotation arm at a position distanced from the rotation arm axis, the processing spindle extending in the Z direction from the rotation arm, and the processing spindle rotatably supported with respect to the rotation arm so as to be rotatable relative to the rotation arm about a horizontal processing spindle axis that extends in the Z direction, the horizontal processing spindle axis being parallel with and spaced from the horizontal rotation arm axis;
• and
• a spindle drive source for rotating the processing spindle,
• wherein the machine tool is free of a mechanism that moves any of the Z table, the supporting body, and the arm drive source in an X direction that forms another direction in the horizontal plane and is perpendicular to the Z direction.