Automatic Lathe

摘要

An automatic lathe is provided which is capable of rapidly and easily switching between machining of a material with a guide bush and machining of the material without the guide bush. The automatic lathe has a head stock ( 6 ) and a guide bush support table ( 1 ). The head stock ( 6 ) is provided with a spindle drive motor ( 8 ). The guide bush support table ( 1 ) is provided with a guide bush rotating motor ( 11 ). There are provided: support table fixing means ( 15 ) for positioning and fixing the guide bush support table ( 1 ); a guide member ( 12 ) rotatably installed on the guide bush support table ( 1 ) and regulated so as not to move forward and backward and having a through-hole formed for a spindle ( 3 ) to be inserted therein; a guide bush ( 4 ) detachably fitted to the tip of the guide member ( 12 ); and spindle fixing means ( 37 ) for positioning and fixing the spindle ( 3 ) on the guide bush support table ( 1 ) at a specified position when the guide bush ( 4 ) is removed from the guide member ( 12 ).