Mahr Federal Air Plug and Air Ring Gages

Mahr Federal Air Plug and Air Ring Gages are used to inspect internal and external dimensions of cylindrical components. They are designed for applications that demand high precision, such as diameter, taper, straightness, roundness, and concentricity measurements. These tools are particularly useful in quality assurance for machined parts in automotive, aerospace, and medical manufacturing.

Air gaging is a non-contact method that uses compressed air to evaluate dimensions. As air exits small jets and encounters a surface, back pressure changes based on the gap between the nozzle and the surface.
This back pressure is interpreted as a dimensional reading. In contrast to contact methods, air gaging reduces wear, limits part distortion, and allows for continuous, high-speed inspection.

Mahr Federal Air Plug Gages can measure through holes, blind holes, counterbores, and tapered holes. These gages are available in various configurations tailored for specific applications such as jet air plugs for diameter, adjustable air calipers for wall thickness, and specialized tools for taper and pitch verification.

Yes. Mahr Federal Air Plug and Air Ring Gages are designed to work seamlessly with the Dimensionair Gaging System. The tooling is pre-calibrated and interchangeable. This eliminates the need to recalibrate the system each time components are swapped.

The recessed jets in Mahr Federal air gages are built deep into the plug body. This design protects the jets from being damaged during use and minimizes clogging from oils or debris. It also contributes to longer tool life and more consistent readings over extended periods of use.

Industries that rely on high-precision inspection standards often use Mahr Federal Air Plug and Air Ring Gages. This includes the automotive sector for engine and transmission components, the aerospace industry for structural and rotating parts, and manufacturers of medical and defense equipment requiring tight tolerance verification.

Mahr offers air plug bodies in hardened steel and optional hard chrome-plated finishes. Chrome plating increases durability and wear resistance. For this reason, it’s well-suited for high-volume production environments or parts with abrasive properties.

In addition to diameter, these air gages can be used to evaluate taper, wall thickness, concentricity, squareness, and perpendicularity. Specialized configurations also allow for pitch and form measurement inside tapered bores and verification of bore alignment relative to other surfaces.

Yes. Willrich Precision supports custom air gaging solutions. Applications can include extended range air plugs, oil industry-specific configurations, and setups for gun barrel inspection. The flexibility of the system allows adaptation for virtually any complex dimensional challenge.

Selection typically depends on the nominal I.D. or O.D. size, tolerance level, hole style (e.g., through, blind, counterbore), finish requirements, and the desired measurement system (such as Dimensionair). Willrich Precision’s experts assist in identifying the most suitable tool setup and offer guidance on master ring pairing for accurate calibration.

For expert support or a quote on Mahr Federal Air Plug and Air Ring Gages, contact Willrich Precision Instrument today. Your measurement goals are our priority.