Air Bearing Spindles
ABTech’s programmable, high-speed air bearing spindles provide reduced error motion (as low as 1 micro-inch or 0.025 microns). These frictionless spindles have been G0.4 balanced and are thermally stable up to 10,000 RPM or more. The direct drive brushless DC motor comes with a wide range of motor, torque and load sizing.
OPTIONS
High-resolution optical encoders (available with millions of counts per revolution); digital amplifiers and programmable controllers (or fully integratable with your existing CNC controller). Choose standard base, foot or flange mount options. Can be used as a motorless tail stock.
ACCESSORIES
Dual element filter/regulator (highly recommended); vacuum chuck; and precision collet tooling.
ACCURACY CLASSES
- A2 Accuracy Class: Radial/axial and radial asynchronous error motion to less than 2.0 micro-inches (0.05 microns)
- A5 Accuracy Class: Radial/axial and radial asynchronous error motion to less than 5.0 micro-inches (0.125 microns)
ULTRA-PRECISION APPLICATIONS
A rugged choice for very demanding, sub-micron machining and grinding applications, diamond turning lathe machines, micropositioning and 3D image scanning.
SERIES/MODELS
- SP50: 2” (50mm) diameter thrust plate
- SP100: 4” (100mm) diameter thrust plate
- SP125: 5” (125mm) diameter thrust plate
- WHS180: 7” (180mm) diameter thrust plate


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Motion Experts
For ultra-precision rotary motion, call on ABTech. We understand your goals—and how to meet them with rotary air bearing technology.
Our rotary air bearings are achieving frictionless motion and micro-positioning in aerospace, semiconductor, biomedical, optical and other ultra-precision applications.
Our engineering team is ready today to help you solve your rotary motion problems.