Oil Hydrostatic Linear Stages

Oil hydrostatic linear stageOil hydrostatic linear stage front view

ABTech’s oil hydrostatic linear stages are built for the most demanding applications. The oil hydrostatic fluid film provides high load capacity and extreme stiffness. This allows every stage to provide ultra-smooth motion, sub-micron accuracy, and absolute repeatability. These hydrostatic bearings have no contacting mechanical parts to wear or create drag, allowing for decades of reliable maintenance-free motion.

Our oil hydrostatic stages are commonly used as the core axis 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.

Configuration Flexibility

Precision motion comes in many forms and applications, each with its own set of pertinent specifications. The diversity in today’s applications creates many unique requirements, so providing configuration flexibility is integral to our design philosophy. All linear stages can be customized with a variety of options and accessories including motor drives, vacuum carriage top, high-resolution optical encoders, digital readout (DRO) displays, inspection-grade granite surface plates, and more.

In addition to the options and accessories, the material selection of linear stages is a key focus of our applications engineers. For the harsher environments, best accuracy, precision and stability we use hardened stainless-steel air bearing components. This affords forgiveness from minor accidental touchdowns 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 linear 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. Manufactured with tight geometric tolerances, our standard hydrostatic stages are able to deliver arcsecond pitch, roll and yaw.

  • 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 in 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 are, 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 carriage top and controller to hold sensitive lightweight parts safely and securely
  • Custom bolt patterns
  • 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

Motor Drive Options

Air bearing linear stages motor drive options

With proper selection and integration of high-performance brushless DC servo motors ABTech’s hydrostatic linear stages provide ultra-smooth and precise linear motion. With high torque, high performance motor drives, ABTech’s stages are designed to accommodate a wide range of precision motion applications typically found in precision machining and grinding. 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, or high-speed constant motion, or a combination of both there is an ABTech linear stage that will meet your needs.

Air-Bearing Linear Stages Motor Drive Options
Air-Bearing Linear Stages Motor Drive Options
Air bearing linear stage with motor drive option
Air bearing linear stage with motor drive option


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 of U.S. and imported parts

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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