HYDROSTATIC SYSTEMS

HYDROSTATIC SCREW

Advantages over the ball screw and rolling bearing at a glance:

– Wear-free, as there is no contact during operation
– No loss of accuracy, even in long operation under full load at maximum
– Speed
– Frictionless at low speeds
– No reversal of the frictional force when changing the direction of rotation
– Transmits the slightest rotary movements
– No stick-slip effect even at low speeds
– No fluctuations of the frictional torque due to the ball circulation
– Higher axial stiffness like ball screws
– Much better damping, thus better workpiece surface and tool life
– No vibrations due to the ball circulation
– Also suitable for high speeds and accelerations
– Low-cost alternative to the linear motor with higher accuracy, much lower
– Heating
– Much lower power loss and therefore no problems with chips on the permanent magnets
– Many times lower cooling capacity than linear motors

Technical features at a glance:

– Absorption of axial and radial forces as well as moments suitable for single-sided bearing of the threaded spindle-
– High-precision bearing of the screw drive
– Double cones suspended between hydrostatic pockets for bearing in “O” arrangement
– Integrated flow control by pocket pressure only, only one hydraulic connection,
– No additional electronic control required
– All supply lines and drains in the flange area
– Optional sealing to one side by sealing air/gap seal or sliding seal
– Spindle ends are made according to customer requirements

The hydrostatic nut is adapted to:

– Axial load in both directions
– max. Speed
– Desired stiffness

Advantages of hydrostatic bearings over rolling bearings at a glance:

– Wear-free, as there is no contact during operation
– No loss of accuracy, even in long operation under full load at maximum speed
– Frictionless at low speeds
– No reversal of the frictional force when changing the direction of rotation
– Transmits the slightest rotary movements
– No slip-stick effect even at low speeds
– No fluctuations of the frictional torque due to the ball circulation
– Much better damping, thus better workpiece surface and tool life

Technical features of the hydrostatic bearings for supporting the threaded spindle:

– Absorption of axial and radial forces as well as moments suitable for single-sided bearing of the threaded spindle
– High-precision bearing of the screw drive
– Double cones suspended between hydrostatic pockets for bearing in “O” arrangement
– Integrated flow control by pocket pressure only, only one hydraulic connection, no additional electronic control required
– All supply lines and drains in the flange area
– Optional sealing to one side by sealing air/gap seal or sliding seal