Patent ID: 8191390

Claim:
A radial roller head with rollers distributively arranged in a holder under the same angular separations and in axial separations around a roller axis, the roller surfaces of which have an increasing progression in a spiral manner around the circumference in the counter clockwise direction; a gear wheel drive coupling the rollers together; a locking device for the rollers, said locking device automatically locking into place after each full roller rotation and releasable before each roller procedure via a movable locking element; a drive device, which turns the rollers after the release of the locking device up to the contact of the roller surfaces with a tool, in order to then be further turned through friction therewith; an electromagnet arranged in the radial roller head, said electromagnet being connected with the locking element; and an electrical energy source and a switch, each arranged in the radial roller head, which connects the energy source with said electromagnet when the switch is actuated via a work piece or another actuating device.