Planetary roller screw PLSA

high rotational speed

• Smooth functioning due to the principle of synchronized planets • Very low noise • High travel speeds • Large number of contact points • High load ratings Rexroth planetary screw assemblies offer design engineers many opportunities to solve transport and positioning tasks with a driven screw. At Rexroth you will be sure to find exactly the kind of tailor-made products you need for special applications. • High mechanical efficiency • Long service life • Compact design • High power density • Effective, wiping sealing • Low lubricant consumption • Pre-tensioned units available • High positioning and repeat accuracy Rexroth planetary screw assemblies offer design engineers many opportunities to solve transport and positioning tasks with a driven screw. At Rexroth you will be sure to find exactly the kind of tailor-made products you need for special applications. Structural design: Both the screw and the nut have an identical multi-start profile with a flank angle of 90°. The planets have journals at both ends, which are lodged in holes bored in the guide discs. The toothed ends of the planets engage with the internal gear rims of the nut. The planets have single-start threads and crowned flanks that roll without slipping along the nut threads. At each end of the nut there are internally geared rims which engage with the external gearing on the planets. Guide discs inside the gear rims support the planets’ journals and ensure that they are correctly spaced. The discs also prevent coarse dirt from working its way into the nut. Versions: • Cylindrical single nut with backlash or preload (ZEM-E-S)