Hydrostatic lead screws and bearings

Both you and your customers can benefit from the advantages of our globally unique hydrostatic lead screws.
 

Advantages over ball screws and rolling-element bearings at a glance: 

  • wear-free, as there is no contact during operation
  • no loss of precision, even during long-term use at full load and maximum speed
  • no friction at low speeds
  • no friction force backlash when the direction of rotation changes
  • translates even the smallest rotational movements
  • no stick-slip effect even at low speeds
  • no fluctuations in frictional torque due to ball circulation
  • higher axial stiffness similar to ball screws
  • significant improvement in damping, resulting in better workpiece surface finish and tool service life
  • no oscillations due to ball circulation
  • also suitable for high speeds and accelerations
  • cost-effective alternative to the linear motor with greater precision and significantly lower heat generation
  • significantly less power dissipation and, as a result, no problems with swarf on permanent magnets
  • much lower cooling power than linear motors

 

Special technical features at a glance:

  • accommodates axial and radial forces as well as torques, suitable for one-sided lead screw support
  • high-precision support of the lead screw
  • double cone suspended between hydrostatic pockets in 'O' arrangement
  • integrated volume regulation simply through pocket pressure, just a hydraulic connection required,
  • no need for additional electronic controls
  • all ingoing and outgoing feeders in the flange facing
  • optional sealing on one side via sealing air, gap ring or sliding seal
  • spindle ends can be designed to meet customer requirements

 

The hydrostatic nut is adjusted for:

  • axial loading in both directions
  • max. rotational speed
  • required stiffness

 

Advantages of hydrostatic bearings compared to rolling-element bearings at a glance:

  • wear-free, as there is no contact during operation
  • no loss of precision, even during long-term use at full load and maximum speed
  • no friction at low speeds
  • no friction force backlash when the direction of rotation changes
  • translates even the smallest rotational movements
  • no stick-slip effect even at low speeds
  • no fluctuations in frictional torque due to ball circulation
  • significant improvement in damping, resulting in better workpiece surface finish and tool service life

 

Special technical features of hydrostatic bearings for supporting the lead screw:

  • accommodates axial and radial forces as well as torques, suitable for one-sided lead screw support
  • high-precision support of the lead screw
  • double cone suspended between hydrostatic pockets in 'O' arrangement
  • integrated volume regulation simply through pocket pressure, just a hydraulic connection required, no need for additional electronic controls
  • all ingoing and outgoing feeders in the flange facing
  • optional sealing on one side via sealing air, gap ring or sliding seal