Industrial Valves

Compact Inverted Rollerscrews

Compact inverted rollerscrews from SKF present the technological advantages of planetary rollerscrews, combined with extra compactness and high carrying capacity associated with smaller leads.

The Inverted Roller Screw works on the same principle as a planetary rollerscrew, with the rollers rotation being synchronized with the threaded shaft through toothed rings. Either nut or shaft can be rotated by an electric motor, the non-rotating component thus acting as the push rod of an actuator.


  • Small lead, with high load carrying capacity
  • Compactness
  • Guiding and sealing functions easily integrated on smooth surface of nut or shaft
  • Customized attachment between electric rotor and screw components
  • Reduced requirements for electric motor torque to reach high load actuation