Tooth-edge gear working machine

In a tooth edge working machine for working the face edges of spur, bevel and similar type gears, said machine having a workpiece spindle mounted on a workpiece headstock and a tool spindle, said workpiece spindle being adapted to receive a workpiece thereon, a first motor for driving said workpiece spindle, at least one tool clampingly received in said tool spindle and a second motor for driving said tool spindle, the improvement comprising wherein said workpiece headstock is selectively provided with at least one of (1) a first gear train and gear drive means coupling said first gear train to said workpiece spindle and said first motor for effecting a continuous rotary drive of said workpiece spindle driven by said first motor and (2) a second gear train which contains a means for effecting an intermittent rotation of the said workpiece spindle drivingly coupled to said gear drive means coupled to said workpiece spindle and said first motor, said first gear train including at least one gear and means for removably supporting said one gear in said first gear train and when removed a space is defined, said second gear train being insertable into said space of said removed gear to thereby effect the change from a continuous rotary drive of said workpiece spindle to an intermittent drive thereof.