Abstract: A loader-unloader system for loading and unloading workpieces into a machine tool wherein each workpiece is held in position about an axis during which various machine operations may be performed. The tool comprising a loading chute or conveyor adapted to deliver articles in succession to a loading position, an unloading chute or conveyor adapted to receive workpieces, and a loader-unloader assembly. The loader-unloader assembly comprises a track extending along an axis parallel to the longitudinal axis of the machine, a carriage movable along the track and means for moving said carriage back and forth along the said track. A loader-unloader head assembly is mounted on the carriage, and includes a head having a multiplicity of fingers movable radially inwardly and outwardly for gripping a workpiece.