Air Bearing Rotary Tables
ABTech’s precision air bearing rotary tables address the metrology needs for different weights and part size. Built for the most demanding applications, every table provides ultra-smooth motion, sub-micron accuracy and absolute repeatability. Designed and manufactured in-house to extremely tight geometric tolerances, air bearings have no mechanical contacting parts to wear or create drag. This allows for decades of reliable maintenance-free motion.
ABTech’s AT models come standard with dual element filter/regulators and are commonly used as the core axis in equipment checking total indicator reading (TIR), roundness, flatness, squareness, perpendicularity, concentricity and parallelism measurements. They are ideal as stand-alone units for checking runout of turned parts, optical lens alignment, assembly applications, precision indexing, and light machining or grinding.
The heavy-duty HDRT tables complete the product family. They are a perfect solution for large part applications.
To speed part setup and increase productivity, the AT model tables come standard with our industry-best adjustable tilt and center (tip/tilt) work-tables. The tilt and center are optionally available on the HDRT models.
We understand metrology needs often require operating in harsher environments. We use the most durable hardened 440C stainless-steel air bearing. This affords forgiveness from minor accidental touch downs that may result from low air pressure, excessive loading, or operator error.
All rotary tables can be customized with a variety of options and accessories including motor drives, vacuum worktable (AT Series), high-resolution optical encoders, digital readout (DRO) displays, inspection-grade granite surface plates and gage stands.
If our standard tables don’t fit your application, our precision motion experts will work closely with you to configure a rotary motion solution that will meet your exact needs.
Features & Benefits
Accurate, Repeatable, Smooth Motion
Manufactured with tight geometric tolerances, our standard air bearings deliver radial and axial error motion of <2.0 µ” (50.0 nanometers) and angular errors (coning) of 1.0 µ” per inch (25.0 nanometers/25mm). And custom configurations can deliver the ultimate in accuracy with radial and axial error motion of as little as 1.0 µ” (25.0 nanometers) and angular errors (coning) of 0.5 µ” per inch (12.5 nanometers/25mm). Air bearings provide significant advantages over mechanical bearings or other approaches to precision worktables. They have no mechanical contacting parts to wear, or create drag, air bearings are close to frictionless, providing ultra-smooth, repeatable and maintenance-free motion.
Metrology is no longer relegated to the quality control lab. To maximize productivity, we know many applications require integrating measurement devices within the production and assembly processes. This means being exposed to harsher environments, ABTech uses hardened 440C stainless steel components – so you’ll experience many years of service and investment longevity.
Configuration Flexibility to Meet Your Specific Needs
Part of our “Pride in Precision” philosophy means providing you with the precise solution needed. We don’t believe selling our customers more, or less, than what their application calls for. For over two decades working with our customers we’ve developed a broad range of options and accessories to address the majority of ultra-precision motion applications. (See options and accessories for a complete list.)
No matter how broad our product options, we realize they don’t address every possible application. Our precision motion experts will work closely with you to configure a rotary motion solution that will meet your exact needs.
- Motor drives and controls
- Encoders and digital readouts (DRO)
- Vacuum worktable and controller to hold sensitive lightweight parts safely and securely
- Custom bolt circle patterns
- Standard and custom size clear apertures
- ABTech Precision Centering Fixtures
- Custom fixturing and work holder tooling
- Gage stands
- MicroTIR electronic gage packages
- µTIR-10: display with single lever-type electronic indicator
- µTIR-11: display with single lever-type electronic indicator and encoder interface
- µTIR-20: display with dual lever-type electronic indicators
- µTIR-21: display with dual lever-type electronic indicators and encoder interface
- Granite surface plates
- Structural steel frames with passive vibration isolation leveling feet
- Certified 2µ” round master test ball and cover
Air Bearing Rotary Table Specifications
|Radial & Axial||<2.0 µ” (0.05 µm)||<10.0 µ” (0.250 µm)|
|Tilt (Coning)||<0.206 arc sec or 1.0µ”/in (0.025 µm/25mm)|
|Maximum Part Diameter|
|Axial Load Capacity||300 lbs|
|Tapped holes||1/4 -28 UNF|
|Tilt and Center||4-knob spherical seat||8-knob spherical seat||n/a|
|Knob Configuration||2 centering, 2 leveling at 90⁰||4 centering , 4 leveling at 90⁰||n/a|
|Air Consumption||2.0 cfm @ 60 psi with dual stage filter/regulator||4.0 cfm @ 60 psi with dual stage filter/regulator|
|Product Dimension||9.25" OD x 5.50" T|
235 x 140 mm
|12.63" OD x 7.25" T|
321 x 184 mm
|17.25" OD x 8.50" T|
438 x 216 mm
|19.00" OD x 8.00" T|
483 x 203 mm
|22.00" OD x 3.40" T|
560 x 86 mm
|26.00" OD x 3.50" T
660 x 89 mm
|Product Weight||50 lbs|
Motor Drive Options
With proper selection and integration of high-performance brushless DC servo motors ABTech’s air bearing rotary tables provide ultra-smooth and precise rotary motion. With high torque, high performance motor drives, our motion experts will gather your specific requirements and work closely with our motor suppliers to create/select a motor drive that suits your specific application. Whether you need sub-micron position accuracy with minimal settle time and stringent following error specifications, high-speed constant motion, or a combination of both there is an ABTech rotary table that will meet your needs.
The motor drives are designed to accommodate a wide range of precision motion applications such as optical metrology; circular geometry gages; and micro machining with ultra-precision scanning, velocity control, speed regulation and precision indexing.
ABTech’s modular design approach facilitates multiple system configurations to optimize the price-for-performance required in your application. This approach allows the user to define the level of control desired for the most cost-effective solution. Our complete engineering services allow us to respond quickly to provide a solution to your O.E.M. requirements for ultra-precision rotary motion.
Thanks a lot for your help. Your rapid, informative correspondence was invaluable. Hopefully I won't be bothering you with any further questions, but it's good to know you're willing. (following remote technical support provided for system installed at the South Pole)Morgan HedgesPost-doctoral Research Associate
Every product we sell exemplifies our company-wide commitment to "Pride in Precision" craftsmanship. To that end, all of our products are designed, manufactured, and tested exclusively by ABTech at our New Hampshire facility.