1. Delivers lower power consumption by automatically unloading recording heads during idle to reduce aerodynamic drag, and disengages read/write channel electronics.

2. The inventive device is further provided with a clutch coupling (38) that functionally disengages a part (28) of the helical gear (16) from the electromotor when an admissible return stroke is exceeded, thereby preventing a mechanical failure or damage of the wheel brake device (10) in the event of such a failure mode.