The difference between planetary roller screw and ball screw

1、Different structure: The ball screw uses the rolling of balls and guides to transmit force, while the planetary roller screw uses the rolling of planetary rollers and thread nuts to transmit force.

2、Different load capacity: The load capacity of the planetary roller screw is higher than that of the ball screw, because the planetary roller can withstand larger radial and axial loads.

3、Different precision and rigidity: The precision and rigidity of the ball screw are higher than those of the planetary roller screw, because the rolling friction of balls is smaller than that of planetary rollers.

4、Different application ranges: The planetary roller screw is usually used in transmission systems with high loads and high speeds, while the ball screw is suitable for transmission systems with high precision and high speeds.

5、Different maintenance costs: Due to the more complex structure of the planetary roller screw, its maintenance cost is usually higher than that of the ball screw.