Patent ID: 6901829

Claim:
A turret lathe comprising: a bed having two opposite ends; a headstock mounted on one of said opposite ends of said bed; a driving unit mounted on said bed; a spindle journalled to said headstock and driven by said driving unit to rotate about a rotation axis; a chuck mounted on said spindle; a first slide mounted slidably on the other of said opposite ends of said bed and slidable toward and away from said chuck in a longitudinal direction parallel to said rotation axis; a second slide mounted slidably on said first slide and slidable toward and away from said rotation axis in a transverse direction relative to said longitudinal direction; a tailstock mounted on said second slide; a driven shaft journalled to said tailstock; a turret mounted on said driven shaft so as to co-rotate therewith, disposed between said chuck and said tailstock, and adapted to permit mounting of a plurality of tools thereon; a transmission unit associated with said spindle and said driven shaft; and a clutch that is associated with said transmission unit and said spindle and that is operable between a chamfering operation mode, in which said transmission unit interconnects said spindle and said driven shaft through said clutch, thereby permitting co-rotation of said spindle and said driven shaft, and a turning operation mode, in which said spindle is disconnected from said driven shaft, thereby avoiding rotation of said driven shaft when said spindle rotates.