Tail-screw.
（Lathe.) The screw which advances or retracts the back center. In the commoner description of lathes the back center is at the end of the tail-screw, but in superior lathes the center is formed on a plug fitted in the end of a plunger, which is simply advanced and retracted in the barrel of the tail-stock by the rotation of the screw. The back center is held to its adjustment by the setscrew above.
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| Tail-pipe. |
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| Tail-screw. |
