Tool holder for lathe and lathe with this tool holder

摘要

Problem to be solved: to provide a lathe in which the maximum machining outer diameter caused by the tool is enlarged by improving the tool placement in the turret.The lathe 1 moves the main shaft 4, the turret 8, the main shaft 4 and the turret 8 relative to the center axis 4a of the main shaft 4 in the z-axis direction, and the main shaft 4 and the turret 8 move relatively in the x-axis direction orthogonal to the Z axis The x-axis feed mechanism 15 is provided with a plurality of tool holders th mounted on the turret 8.The at least one tool holder th has an X-axis including the center axis 8A of the turret when the holding position for holding the tool t of the tool holding portion is divided into the machining position by the rotation of the turret 8, and the cutting edge reference position tr of the held tool t is The z-axis plane P is set to the offset position on one side.Diagram