Hydrostatic Rotary Table

HTR – Hydrostatic Rotary Table
Hydrostatic Rotary Table Back

HTR Hydrostatic Rotary Table – Back

Hydrostatic Rotary Tables

ABTech’s line of precision oil hydrostatic rotary tables address the motion needs for a full range of part sizes and weights. Built for the most demanding applications, oil hydrostatic fluid film bearings provide high load capacity and extreme stiffness. Every stage provides ultra-smooth motion, sub-micron accuracy and absolute repeatability. Designed and manufactured in-house to extremely tight geometric tolerances. ABTech’s hydrostatic bearings have no mechanical contacting parts to wear or create drag. This allows for decades of reliable maintenance-free motion.

Our hydrostatic rotary tables are commonly used in a wide range of machining and grinding applications where medium to high loads are coupled with the need for smooth and repeatable motion. They are ideal as stand-alone units and/or multi-axis assemblies, typically seen in machining and grinding systems.

ABTech’s quality, accuracy, and design flexibility are the reasons our hydrostatic bearings are meeting the ultra-precision motion demands.

All rotary tables can be customized with a variety of options and accessories. This includes motor drives, hydrostatic pump units (HPU), vacuum worktable, high-resolution optical encoders, digital readout (DRO) displays, inspection-grade granite surface plates and gage stand.

In addition to the options and accessories, material selection is a key focus of our applications engineers. For harsher environments, tight accuracy, precision and stability we will use hardened stainless-steel bearing components. This affords forgiveness from minor accidental touch downs that may result from low oil pressure, excessive loading, or operator error. Our precision motion experts will work closely with you to configure a linear motion solution that will meet your exact needs.

Features & Benefits

  • Accurate, Repeatable, Smooth Motion

    Similar to air bearings, hydrostatic bearings provide significant advantages over mechanical bearings or other approaches to rotary motion. Because they have no mechanical contacting parts to wear, or create drag, hydrostatic bearings are close to frictionless, providing ultra-smooth, repeatable and maintenance-free motion.

  • Superior Durability

    ABTech uses hardened 440C stainless steel components to maximize productivity with applications that require integrating motion systems into production and assembly processes with exposure to harsher environments. Durability of our stages affords forgiveness for minor accidental touch downs resulting from low oil pressure or excessive loading. If an accident occurs, often the bearing needs repair rather than replacement.

  • 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. Each ABTech hydrostatic rotary table is designed and built per your specific needs. There is not a standard specifications sheet or drawings on our website. Each stage is uniquely adapted to our customer, therefore expectations are always met and exceeded. 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

Land & Marine


  • 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
  • Hydrostatic Pump Unit (HPU)


  • 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

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.

AT 100
AT 100
AT 200 Direct Drive 1.25arcsec accuracy
AT 200 Direct Drive 1.25arcsec accuracy
AT 100 Foot Mount
AT 100 Foot Mount
AT 200 with variable speed motor, friction clutch and onboard DRO
AT 200 with variable speed motor, friction clutch and onboard DRO
AT 200 Direct Drive with/ TC8
AT 200 Direct Drive with/ TC8
AT 200 Wet Grind Table
AT 200 Wet Grind Table


Thank you for your interest in ABTech’s ultra-precision measurement tools and services.
Please tell us a little about what you need to accomplish and we will be in touch to discuss any of the additional details that will help you choose your best option.

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
Princeton University
Made in the U.S.A.

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.

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