Slaving and blocking device

A hand power tool, having an electric motor rotary drive for rotationally driving a spindle that carries a tool bit;

• and a slaving and blocking device for transmitting a torque from a driving part to a driven part and stopping the driven part at a torque engaging the driven part, said slaving and blocking device being located between said rotary driven and said spindle and comprising means for slaving fixable on the driving part in a manner fixed against relative rotation and having slaving claws that are offset from one another in a circumferential direction;
• a roller star wheel which is located in said means for slaving and is connectable to the driven part in a manner fixed against relative rotation;
• clamping bodies located in freewheeling fashion in the circumferential direction between said slaving claws and points of a star of said roller star wheel;
• a stationary clamping ring located concentrically to said means for slaving and said roller star wheel and having an inner annular face forming a counterpart clamping face for said clamping bodies;
• and radially displaceable centrifugal force elements located in said roller star wheel such that above a predetermined rpm said force elements clamp said roller star wheel firmly to said means for slaving, wherein the slaving and blocking device is a spindle block which transmits torque from a rotary drive to a driven spindle and stops the driven spindle at a torque that engages the driven spindle.