Hydrostatic Leadscrews

• Speed comparable to a linear motor
• Very low friction when machining, virtually frictionless during positioning
• Steps in the 0.1 micron range are possible
• No backlash when reversing direction
• Slip-stick effect is eliminated
• Wear is eliminated because there is no metal-to-metal contact during operation
• No loss of accuracy or stiffness even under full load and oscillating motion
• Friction does not vary when reversing direction
• Very long service life

Unique Technical Features

• High accuracy when transferring rotary motion into linear motion
• Nut is suspended on hydrostatic oil pockets
• Internal flow control
• Only one hydraulic connection required
• Dimensions of leadscrew similar to ballscrew size
• No seal wear or friction
• Adaptable to a machine’s parameters:
• Axial load (can be different in both directions)
• Maximum RPM
• Required stiffness
• Viscosity and temperature of hydraulic oil

Data Sheet

CBN Hydrostatic Grinding Spindle Systems
This is an example of a hydrostatic spindle designed for high speed grinding with CBN grinding wheels. The small bearing diameter in combination with high surface speed allows...
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Comparison: Hydrostatic Leadscrews, Linear Motors, and Ballscrews
Design limitations and problems in ballscrew applications lead to the development of linear motors and to wear-free hydrostatic leadscrews. In
this article we introduce...
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Hydrostatic Linear Motor Guide
The PM Flow Controller makes it possible for machine builders to easily integrate custom hydrostatic systems into both new and existing machines.
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Hydrostatic Application Worksheet
Download the PDF data sheet for the Hydrostatic Application Worksheet
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Application: Hydrostatic Rotary Tables
The world's largest gear and profile grinding machines use hydrostatic bearings.
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Application: Hydrostatic Linear Motor Guide
Linear motors are used on high-speed machine tools with high acceleration and slide speeds. For slides with linear motors, HYPROSTATIK has developed hydrostatic guideways...
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Hydrostatic Slides
- Very low friction, no friction at positioning
- Movement of 0.1 micro-m possible
- No reversal backlash of friction force

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Hydrostatic Center Bearings
- Only one radial bearing
- Moment and axial forces are carried by an axial bearing
- Integrated clamping piston and rotating oil union for a hydraulic collet....
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Hydrostatic Lathe Spindles
- Very low friction will heat the spindle only slightly. Nearly all motor power gets to the
workpiece. Heat that is generated is moved immediately out of the spindle...
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Advantages of Hydrostatic Over Ballscrews

Unique Technical Features

Data Sheet

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