Patent ID: 7240412

Claim:
A composite lathe comprising: a bed; a first and a second spindle headstock disposed on said bed to face each other and to be coaxial with each other; a tool post disposed between said first spindle headstock and said second headstock to be movable in an X-axis (up/down) direction; and a third spindle disposed on said bed to be movable in the X-axis direction, a Y-axis (front/back) direction, and a Z-axis (left/right) direction, wherein an XY supporting plane which is parallel to the X-axis and Y axis and by which said tool post is supported to be movable in the X-axis direction and an XZ supporting plane which is parallel to the X axis and Z axis and by which said third spindle is supported to be movable in the X-axis direction are orthogonal to each other, wherein an axis of the movement in the X-axis direction of said tool post is set apart inthe Y-axis direction from the XZ supporting plane, and an axis of the movement in the X-axis direction of said third spindle is set apart in the Z-axis direction from the XY supporting plane, and wherein the XY supporting plane, which is parallel to the X axis and the Y axis, and the XZ supporting plane, which is parallel to the X axis and the Z axis, are orthogonal to each other.