AIR RINGS TO MEASURE EXTERNAL DIAMETERS
Source: Western Gage Corporation
Air Ring Gages have a precision ground hardened steel body with built-in air gage nozzles
Air Ring Gages have a precision ground hardened steel body with built-in air gage nozzles. When the ring is slipped over the workpiece, the resulting backpressure is sensed by the air gage readout and displayed as the diameter of the part. Air rings come in 2 and 3-jet configurations. The 3-jet air ring checks for 3-lobe out-of-round conditions prevalent in centerless ground parts that can not be detected with a 2-point gage.
Air ring styles. Center-jet style air rings have gaging nozzles in the center of the body; shoulder types have the nozzles near the edge. For both air rings and air probes, the best wear life is obtained by using thru-hole or center-jet styles when the application permits, since the greatest wear tends to occur at the leading edge of the gage.
Custom applications include air snap gages, which offer a convenient way to check crankshaft journals or similar parts, and slot jet air ring gages, which use a slot jet for measuring narrow land areas of valve spools that can not be covered with standard gage nozzles.
Western Gage Corporation, 3316-A Maya Linda, Camarillo, CA 93012. Tel: 800-423-5062; Fax: 805-445-7530.