Setting Masters

Ring masters, setting discs and GO/NO GO plug masters in gagemaker's classes XX to Z, lapped to size. Every master ships with a long-form certificate traceable to NIST from an ISO/IEC 17025 lab.

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Air Plug Gages (Air Probes)Air Ring Gages Air Snap Gages

Plain setting ring master marked 1.2500 XX

RGM · Classes XX to Z

Ring Gage Master (Setting Ring)

Lapped, certified setting rings for air plugs, classes XX to Z.

Sizes: .0901" to 19.010" (2.29 to 482.85 mm)

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PGM · Classes XX and X

Plug Gage Master: Taperlock, Trilock & Wire

GO/NO GO plug masters in wire, taperlock and trilock styles, lapped and certified.

Sizes: .015" to 12.010" (0.38 to 305.05 mm)

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Style 1 full-length and style 3 short master setting discs

SDL · SDS

Master Setting Disc (SDL / SDS)

Lapped setting discs for air rings and snap gages, in ANSI style 1 or style 3.

Sizes: .150" to 14.510" (3.81 to 368.55 mm)

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Which master do you need?

To set or check	Use	Sizes
An air plug (bore gage)	Ring gage master (RGM)	.0901″ to 19.010″
An air ring or snap gage	Master setting disc (SDL / SDS)	.150″ to 14.510″
A bore, or an air plug's size	Plug gage master: wire, taperlock or trilock (PGM)	.015″ to 12.010″

How many?

Dual Master air gaging takes two masters, one at each end of the tolerance. Single Master takes one, at nominal; for best results, pick a size near the middle of the part tolerance.

Classes and certification

Masters are made to gagemaker's classes XX, X, Y and Z; we supply Class XX unless you specify otherwise. Every master ships with a long-form certificate of calibration showing the actual measured size, traceable to NIST, from a temperature-controlled lab conforming to ISO/IEC 17025 and ANSI/NCSL Z540-1.