Numerically controlled lathe with guide bush, and method of processing workpiece by using the numerically controlled lathe

摘要

Disclosed is a numerically controlled lathe 100 which includes a head stock 110 which rotatably supports a spindle 120; a guide bush 170 disposed so as to face the head stock 110 and configured to support one end of a bar-like workpiece W extending from the spindle 120; and a tool post 130 having a tool T1 to process the workpiece W supported by the spindle 120 and the guide bush 170, the guide bush 170 being movable in the same direction as a spindle axis C, the lathe further including a first processing region A which is provided between the guide bush 170 and the spindle 120 and in which the workpiece W is processed by the tool T1 attached to the tool post 130.