Machine tools

In a machine tool comprising a machine bed and a workpiece spindle mounted on said machine bed, said spindle being rotatable about its axis to rotate a workpiece to be machined, a tool turret assembly comprising:

• turret support means mounted on said machine bed, said turret support means and said workpiece spindle being relatively movable on said machine bed in a first direction parallel to the axis of said workpiece spindle and in a second direction at an angle to the axis of said workpiece spindle;
• a main tool turret for carrying a first plurality of tools, said main tool turret being carried by said turret support means for pivotal movement about an axis parallel to the axis of said workpiece spindle, said main turret having a predetermined inoperative angular position relative to said workpiece spindle;
• and an auxiliary tool turret for carrying a second plurality of tools, said auxiliary turret being carried by said main turret for pivotal movement about an axis parallel to the axis of the workpiece spindle, whereby each tool of said second plurality of tools can be selectively brought into an operative angular position relative to said workpiece spindle with said main turret in it predetermined inoperative angular position;
• in which turret assembly the improvement comprises:
• said auxiliary turret being located eccentrically with respect to the pivotal axis of said main turret.