The planetary roller screw convey power is different, and around the main threaded screw, arranged according to the carrying capacity asteroid installing a plurality of threaded rollers, so that the rotational movement of the motor is converted to a straight line of the screw or nutmotion, planetary roller screw is a rotational movement to convert the linear motion of a mechanical device, is quite similar with the trapezoidal screw, a ball screw drive, but a different point is: planetary screw able to work very bitterthousands of hours under heavy load, environment, screw the planet so that you make the ideal choice requires continuous duty applications. Planetary roller screw and ball screw performance comparison:
 Load and hardness:
 Planetary roller screw is a multi-line contact force, the multi-point contact ball screw force. The increase of the contact surface, and the carrying capacity and rigidity of the planetary roller screw will be greatly improved.