Master Setting Discs
Standard American Gage Design (A.G.D.) Master Setting Discs for calibrating Air Rings and Airsnaps with Precisionaire and A/E Electronic Column Instruments are available in sizes .105 through 6.010. Larger sizes are available upon request. A.G.D. Style No. 1 is available in all sizes; A.G.D. Style No. 3 is recommended for sizes over 1.135.

Master Setting Rings
Standard A.G.D. Master Setting Rings for calibrating air spindles with Precisionaire and A/E Column Instruments are available in sizes .040 through 4.760, with larger sizes available upon request.

Important notes on Master Setting Discs and Rings: Tolerance classes recommended for instrument calibration are X, XX, and XX calibrated. Gagemakers' tolerances are taken bilaterally, unless otherwise specified. (Tolerance is split plus and minus from nominal size.) Standard materials are steel, hard chrome plating or solid tungsten carbide. Discs and Rings with certification of calibration are required for set up of Electronic Instruments with digital readouts.