PERFECTIONNEMENTS A L'ENTRAINEMENT DE LA BROCHE DANS UN TOUR A ECROUTE

摘要

The driving rollers of a milling lathe are moved into driving position by symmetrical jacks and are interconnected by at least one screw having two threads of opposite pitch. The screw is rotated by a motor without longitudinal movement to move the rollers symmetrically toward or away from the axis of the work.