MicroTIR Main Screen in Dual Probe Configuration
MicroTIR Main Screen in Dual Probe Configuration
MicroForm Roundness Measurement Results with Polar Plot and Harmonic Analysis
MicroForm Roundness Measurement Results with Polar Plot and Harmonic Analysis
The machine is really an amazing piece of engineering craft. I hate to see your guys go. They were really great and patient with us.
Marcela Stern
Research Scientist
Columbia University’s Nevis Labs


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 Articulating Arm  –  Single & Dual Probe

(Max Part Size: 16″ dia. x 20″ tall, Max Part & Fixture Weight: 500 lbs)

Quickly and easily measure precision geometric forms with unmatched repeatability.  Our roundness gages incorporate an ABTech designed and built air bearing rotary table that delivers ultra-precision results. A powerful yet intuitive user interface simplifies navigation, displaying the results in a familiar way. These ease-of-use features allow operators of all skills levels to take exacting measurements on the shop floor or in the QC lab.

All MicroForm gages measure roundness, runout, flatness, concentricity (in and out of plane), parallelism and perpendicularity. They are used for a variety of manufacturing and quality functions including, in-coming inspection for vendor compliance, in-process tolerance confirmation, manufacturing process control and improvement, and quality control and part analysis.

Currently have a gage that’s functional but isn’t quite cutting it?

If you don’t need a new gage we don’t want to sell you one. Save thousands of dollars by upgrading your current air bearing-based gage with a new MicroForm controller and software. We’ll also work with you to customize your platform to address unique applications.

For more detailed specifications read more in the tabs below or view the datasheet for this product.

To learn more about software for this product, view the MicroForm Software datasheet.

Features & Benefits


Accurate and Repeatable

An ultra-precision air bearing rotary axis is the foundation for all MicroForm gages. Combined with a highly responsive lever-type probe with nearly perfect linearity, our gages carry an overall system accuracy certification better than 5 millionths of an inch (5μ” or 0.125 μm). With no mechanical contacting parts to wear or create drag, air bearings produce virtually no friction. This translates into ultra-smooth, repeatable and maintenance-free operation.

Stable and Reliable

Frustrated by frequent measurement errors? That’s why our platforms are engineered to minimize the need to take repeat measurements. For added shop floor durability, and to maximize thermal and vibration stability, each air bearing is recessed in a finish machined metal base – with no branded plastic housing. And minimal cabling and connectors help reduce electrical interferences that could distort your measurements. With such a robust design, you can be confident that your measurement result is from the part alone, and don’t include “noise” from outside influences.

Quick Part and Probe Setup

Our industry-best tilt and center worktable with very fine adjustments allow operators to precisely level and align parts to the bearing’s axis of rotation, reducing eccentricity. The spherical seat design maintains the part’s center point when leveling, saving you time and frustration in setting up the part for measurement.

An articulating gage arm lets you rapidly switch between a diameter and a face or from an OD to an ID. You won’t waste time wrestling with locks or swivel joints. Fine resolution dual-action micro-adjust knobs and visible linear scales on both the horizontal stage and vertical post allow pinpoint alignment of the probe tip to the measurement surface. The articulating arm and probe mount feature detents at 90° for quick diameter or face access and drift free positions in between.

To further speed the measurement process, the MicroForm µFG200 offers multiple gage stand configuration options and dual gage head capabilities. Add a second side mounted gage stand, or for further flexibility, replace the articulating arm with two universal style gage stands on a T-slot base.

Familiar User Interface with Touch Screen Navigation

We’ve designed our measurement program to display results in a fashion that is familiar for shop floor operators while providing full function analysis for quality control labs. In the case of a user interface often less in more. MicroForm’s intuitive software features two simple views on a large color touch screen monitor, delivering quick and easy results whether you’re a novice or experienced operator. Toggle between the main setup screen with active analog and digital runout meters, to the results screen with graphical polar and linear charts. A sidebar menu of all the form options along with measurement results are always visible And for novice operators, on screen “step-by-step” instructions are available. (Learn more about MicroForm software.)

Unique, Dedicated Processing Power for Fast Measurements

Our gages are driven by a “real-time” operating system with dedicated FPGA processing platform and signal conditioners. These are the workhorses for performing the measurement algorithms, eliminating resource conflicts typical with systems running on PCs. The gage’s dedicated processor results in high speed data acquisition and instantaneously synchronizes the indicator displacement with a high resolution encoder for pin-point accuracy. This powerful processing platform not only provides tremendous system performance but also permits future system enhancements without the cost and downtime associated with hardware obsolescence.

A Spectrum of Analysis Functionality

To ensure quick and accurate measurements, surface interruptions can be automatically removed during a measurement or easily edited out using our drag and exclude feature. You also have the flexibility to analyze part harmonics (slope and lobing optional) right on the results screen or export the data for statistical process control (SPC).

User definable system preferences for customizing output and displays are readily accessible through the configuration button. Select from four reference circle types: Least Squares Circle (LSC), Minimum Zone Circle (MRS), Minimum Inscribed Circle (MIC), and Maximum Circumscribed Circle (MCC), Gaussian filter settings, units of measure, and other options to match your part drawing’s requirement.

Quickly print or save a PDF file to share the measurement results and graphical charts and document traceability. And each PC includes an Ethernet network card to provide remote file storage and enterprise connectivity.

MicroForm™ Software

for Precision Measurement

A straightforward interface which increases productivity, streamlines training, and offers the highest degree of operator flexibility. The full functionally is made easy so operators of every skill level can use our gages. The maximized interface accommodates different skill levels with on screen “step by step” instructions that don’t interrupt an experience user. All MicroForm gages offer a dual probe option to enhance the measurement process.

Read more about our MicroForm™ Software

Measurement Results Showing Interrupted Surfaces


Working envelope:

  • Axial load capacity (max centered and balanced): 500 lbs (226 Kg)
  • Max part diameter (swing): 16″ (400 mm)
  • Max part height: 20″ (500 mm) with 6″ depth of ID access
  • Height to worktable:40″ (1,016 mm)

Gage system certified accuracy:

  • Radial & Axial accuracy: <5.0 µ " (0.125 µm)
  • Tilt accuracy: <0.206 arc sec or 1.0µ"/in (0.025 µm/25mm)


  • Rotary air bearing table (Model AT200)
    • Integrated motor with clutch for manual rotation
    • 440 hardened stainless steel
    • Grade A granite base dimensions: 19″ x 21″ x 5″
    • Frame construction: welded steel base with vibration isolation feet
    • Air consumption: 2.0 cfm @ 60 psi
    • High resolution rotary encoder
  • Spherical seat type 8 knob tilt and center adjustable worktable (Model TC8-200)
    • 8” (203 mm) diameter with 1.51” (38.35 mm) thru hole with removable plug
    • Concentric ″V″ grooves in worktable equally spaced for rough centering
    • 1/4-28 tapped holes in worktable
    • Eight fine pitch screw type opposing knobs (4 centering, 4 leveling at 90⁰) for precise tilt and center adjustments
  • High output articulating gage stand with lever-type electronic gage head
    • Vertical drive assembly and horizontal slide for precision probe adjustment
    • Right angle horizontal arm assembly for quick arm articulation
    • MicroKnobs for coarse and fine probe positioning
    • Mount (second probe): MicroForm ultra-fine adjust probe mount (#0700A)
    • Base mount (second probe): Gage stand is mounted to granite base on left side of rotary table
  • Granite surface plate and welded steel base frame
    • Grade A black natural granite surface plate dimensions: 21” x 19” x 5”
    • Contains “FPGA” based “real-time” operating system, encoder interface, signal conditioners, and power supply
    • Welded steel base with vibration isolation casters
  • Dual element air filter/regulator for air bearing supply (Model 00787AC)
    • 5.0 micron pre-filter w/ regulator (0 – 150 PSI)
    • 0.5 micron second stage filter, oil/water removing (coalescing)
  • Windows OS desktop PC with 22″ color touch screen monitor, keyboard and mouse
    • Mounts included in mobile electronic cart
    • Ethernet connection for network connectivity
  • Mobile electronics cabinet with:
    • Powder coated heavy gauge steel construction
    • Heavy duty swivel and locking casters for easy mobility
    • Pull out shelf for keyboard and mouse
    • Fixed shelf for MicroForm controller and PC with lower section for optional printer
    • Articulating touch screen monitor mount
  • MicroForm metrology software suite
    • Measure standard geometric forms:
      • Roundness, Flatness, Parallelism, Runout, Perpendicularity (Squareness) and Concentricity (in a single plane and in two planes) with reference axis setup
    • Setup screen with analog and DRO displays for checking TIR and part alignment
    • SAE and Metric units (standard and micro)
    • User definable Gaussian filter UPR’s and display/output and plot settings
    • Manual and automatic editing of interrupted surfaces
    • Harmonic analysis feature for identifying undulations per revolution (chatter)
    • Save and print measurement results
    • Save and access raw data for statistical process control (SPC) or further analysis

All specifications are at 60 psi and subject to change without notice.


  • TC4 style spring-loaded fine adjust Tilt and Center worktable for precision alignment
  • Large diameter and/or customized worktables (up to 16″ diameter)
  • Second gage stand and probe with dual probe software upgrade
  • Universal style gage stand on a T-slot base (replaces the articulating arm style)
  • Retrofitting services


  • Optional probe tips (material and length)
  • Structural steel frames with passive vibration isolation leveling feet
  • Fixtures (3-jaw chucks, Precision Centering Fixture “PCF-200”, etc.)
  • Certified 2µ” round master test ball and cover


  • Aerospace
  • Aviation
  • Automotive
  • Precision optics
  • Bearings
  • Semiconductor

MicroForm gages are used for as variety of manufacturing and quality functions including:

  • In-coming inspection for vendor compliance
  • In-process tolerance confirmation
  • Manufacturing process control and improvement
  • Quality control and part analysis

Similar Products:

    AT200 with TC8 Tilt & Center Worktable AT200 (8″ Ø)
    EAS3000-2T P07 Standard Configuration EAS3000-2T
    AT300 With TC8 Tilt and Center Worktable AT300 (12″ Ø)
    AT400 with TC8 Tilt and Center Worktable AT400 (16″ Ø)
    HDRT Heavy Duty Series HDRT550 (22″ Ø)
    HDRT Heavy Duty Series HDRT660 (26″ Ø)
    MicroForm Model MFG200T µFG200T
    µFG300 Dual Stands µFG300
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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.

I researched and bought the gages from ABTech because we needed a very accurate method of measuring certain features of lenses which we manufacture. We needed to know the center thickness of the lenses to a very high accuracy, as well as the sag and overall height. The two-gage set-up coupled with the programmable display allows us to see all three measurements in one set-up. The pneumatic probes are also adjustable to minimize the pressure on the parts being measured. We've been happy with ours. Andrew E. DugrenierManufacturing Engineering Supervisor
Corning Specialty Materials - Aerospace & Defense and Commercial
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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