A PLANETARY MECHANISM IN WHICH THE PLANET MEMBER IS ROTATED BY FRICTIONAL ENGAGEMENT BETWEEN A STATIONARY ANNULUS AND A DRIVING RIM CARRIED RESILIENTLY BY THE PLANET MEMBER. UNDER STATIONARY CONDITIONS THERE IS A CLEARANCE BETWEEN THE DRIVING RIM AND THE ANNULUS. ON ROTATION, CENTRIFUGAL FORCE DISPLACES THE RIM RADIALLY RELATIVE TO THE PLANET MEMBER, SO TAKING UP THE CLEARANCE AND PROVIDING A DRIVE. IN THE STATIONARY CONDITION THERE IS NO SIDE THRUST ON THE PLANET MEMBER. THE PLANET MEMBER MAY BE A GRINDER WHEEL FOR A CIGARETTE MACHINE CUT-OFF.