Summary of External Turning For Swiss tool automatic lathe (Gang type tool post) How to use Goose-neck holder ¢ Swiss tool automatic lathe (Guide bush system) Goose-neck holder is applicable to automatic lathes whose toolholder does not move to longitudinal direction (Z-axis direction). E l In case of machining with the conventional toolholder Guide bush Bar material Goose-neck Holder is applicable to (X-axis direction) (Workpiece) automatic lathe that toolholder does not move to Small Tools longitudinal direction (Z-axis direction) (Z-axis direction) Toolholder motion Movement of the workpiece Short distance (Close to guide bush) l Problems of machining with the conventional toolholder Problems of machining with the conventional toolholder Problems of Toolholder Installation When using a conventional toolholder During multiple passes, when bar material returns 1) Additional space is required into guide bush, the burr for an adapter. contacts and breaks guide 2) Toolholder’s handling is bush. difficult due to limited space. 3) Necessary to buy an adapter. The workpiece burr contacts 4) An adapter may interfere with the the guide bush and causes next tool post. dimensional variation. Adapter Tool post During multiple passes, when bar material returns into guide bush, the chips contacts and breaks guide bush. Bar material deviation from the guide bush disables machining. E4