Air Gages

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The Need for Air Gaging

Air gaging is a proven inspection tool that allows for measurements to be made faster, more accurately and more conveniently than other gaging methods. In measuring tight tolerance holes, air gages are unsurpassed for speed and accuracy while for checking other dimensional features; air gages offer sufficient magnification and reliability to measure tolerances well beyond the scope of mechanical and fixed limit gages.

Easy to Use

Production workers do not require special training to use air gages. No special techniques are required like with certain types of fixed limit gaging. It’s as simple as inserting the air plug in the hole and reading the meter.


After purchasing the basic gage additional tooling can be purchased for a wide variety of jobs. Because of its adaptability, it is common for air gaging to become the primary measuring system in a quality control system.


Air gages effectively measure a wide variety of dimensions and are particular suited to checking dimensional relationships. This includes taper, parallelism, squareness, straightness, and center distance. Match gaging, which permits the selection of mating parts for a specific amount of clearance or interference, is easily done with just one reading on one dial.

Air gaging is ideal for checking soft or highly polished material as it is a non-contact measurement. It is also ideal for thin walled or delicate material.

Small gage heads with remote meters provide air gages with a distinct advantage in measuring multiple dimensions. Air gaging is often combined with electronic signaling to provide instant indication of part size.

Air gages can be adapted to measure parts in a machine. The small gage head allows an operator to make measurements while the part is still in the machine or fixture. The air also cleans the part’s measuring surface area of coolant, oil, and small chips.


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  • μDimensionair Air Gage

    µDimensionair Air Gage

    The μDimensionair is the ultimate of portability and versatility ó in your hand or at the workbench or machine tool. μDimensionair is rated IP-54, so, it can be used in a production environment and the air tooling cleans dirt from the part for high performance measurements! MORE INFO

  • Dimensionair Air Gage

    Dimensionair Air Gage

    Mahr Federalís Dimension Air Gages are unique among dimensional air gages. They are a differential air pressure type and the only instruments that offer the advantages of a fixed magnification and a balanced air system. MORE INFO

  • Universal Dimensionair Air Gage

    Universal Dimensionair Air Gage

    Choosing either single or dual master gaging systems involves trade offs. The single master system is simple and economical to operate while dual master system provides greater flexibility with limit master requirements.

    Mahr Federal now offers air gaging to satisfy both gaging requirements. The Universal Dimensionair is part of a new series of adjustable magnification air comparators from Mahr Federal. Based on the precision of the standard Dimensionair, the new model offers the ability to work both as a single master or dual master air gaging system.MORE INFO

  • 832 Dimensionair Air Gage

    832 Dimensionair Air Gage

    Digital and analog displays are featured in a single unit. Large high contrast digital readouts show exact deviations from zero. The analog display shows measurements at a glance. MORE INFO

  • Dimensionair Air Plugs, Air Rings and Air Snaps

    Dimensionair Air Plugs, Air Rings and Air Snaps

    Mahr Federal Air Plugs have large clearance allowing easy entrance into the hole being measured with greater measuring range.. The wide clearance and optional hard chrome body extends the life of the air plug gage. Large jet size holes eliminate clogging from dirt and oils. MORE INFO

  • Dimensionair Air Gaging Accessories

    Dimensionair Air Gaging Accessories

    Mahr Federal offers an extensive selection of accessories including handles, extensions, air rings and manifolds backed by industry leading expert technical support. MORE INFO

  • Millimar S 1840 PE Air Column

    Millimar S 1840 PE Air Column

    Analyze measuring results at a glance – Its simple and fast with the Millimar S1840 column amplifier. The Millimar S 1840 column amplifier offers a broad range of functions for combining the signals from both static and dynamic measurements. Measuring results are indicated by way of 101 three-color LEDs. When the programmable warning and tolerance limits are exceeded, the LEDs change their color from green to yellow or red, accordingly — high visibility from any distance. MORE INFO

  • Millimar C 1208 - 1216

    Millimar C 1208 - 1216

    The pneumatic version of Millimar C 1208/1216 features a built-in air-electronic converter. This enables air gages of different magnifications to be connected directly to the Millimar C 1208/1216. MORE INFO

  • Millimar C 1245

    Millimar C 1245

    Though most frequently used for diameter measurement, many other types of dimensional conditions can be checked using Mahr Federal inductive probes and air gaging products in conjunction with specialized tooling. Applications include, but are not limited to: squareness, concentricity, I.D/O.D, center distance, parallelism, diameter and straightness, flatness, thickness, etc. MORE INFO

  • Millimar S 1841 Amplifier

    Millimar S 1841 Amplifier

    With its modular design, Millimar S 1841V can be easily adapted to a variety of measurement tasks. The instrument consists of a base unit and at least one indicating and operating column. Depending on the scope, up to 3additional indicating and operating columns can be attached.

    Millimar S 1841V can be equipped with different measuring amplifier modules. The electronic control and evaluation system is identical on all versions. Measuring amplifiers are chosen in accordance with the measurement task. Up to 4 measuring amplifier modules can be mounted... MORE INFO

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