Bearings

Rotating Nut Solutions Ballscrews

The nut rotates inside bearings and moves along the fixed long lead screw shaft. The drive motor moves with the nut, so inertia problems, associated with a long rotating shaft, are minimised. This is why a counter-rotation system is necessary at the end of the screw shaft.

Benefits:

  • Compact solution, ready to use.
  • Faster engineering
  • Inertia considerably reduced:
  • Smaller, lighter, lower power motors.

Specification:

  • Fixed screw shaft: simplified mounting
  • Inertia considerably reduced: 3 800 kgmm2 instead of 6 000 kgmm2 for a screw shaft, 40¥40-4,5 m stroke
  • Smaller, lighter, lower power motors
  • Higher linear speeds: up to 110 m/min
  • Nominal diameter: 25 to 50 mm
  • Lead: 20 to 50 mm
  • Two versions available:
    - Ball screw with axial play: SLT
    - Ball screw with backlash elimination: TLT
  • Two brush wipers are mounted in the standard configuration for better protection
  • Ball screw lubrication: through the nipple placed on the housing external diameter in the standard version, or as an option through the screw shaft