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Cylindrical Ring Gages

Product Features:

  • The Material. We use only superb quality steels such as 06 or Alloy Steels such as 8620 and Heat Treat our blanks to a minimum of 58RC.
  • The Stabilization Process. Subsequent grinding operations can introduce heat and stress. Meyer puts all blanks through a stabilization process, cycling them through temperature extremes from -130°F to +300°F.
  • The Precision Lapping Process. “Lapping” is the finishing process that removes small amounts of material from the gage surface and brings it within its final tolerance limits.
  • Inspection with NIST – traceable gages. In our Metrology area conditions are a strict, cool 68°F where the relative humidity is between 30- 50% and all of our masters are traceable to NIST.
  • Available in HS Steel, Chrome or Carbide.

Meyer Gage
Pennoyer-Dodge Gage Co.
R.L Schmitt
Western Gage


Plain ring gages are ideal for inspecting outside diameters of manufactured parts. With Go/No Go ring gages, an inspector can quickly pass/fail parts without taking time consuming readings from a measuring instrument. Plain ring gages are also ideal for use as masters for setting bore gages, air gages, and internal micrometers. By using the same size master ring gage, lead error on measurements can be eliminated. Ring gages are available in class XX thru class ZZ gagemaker tolerances. Cylindrical Ring Gages are available in quality tool steel, chrome, carbide and ceramic materials.

MASTER: bilateral (split) tolerance.
GO: unilateral (one way) minus tolerance.
NOGO: unilateral (one way) plus tolerance.
• Ring Gages are manufactured in accordance with ANSI spec B89.1.6 – 1989.
ROUNDNESS and TAPER of all gages will not exceed 50% of applicable gagemaker’s size tolerance and are nonaccumulative.



  • Cylindrical plug gage tolerance is GO (Plus) and NOGO (Minus).Master cylindrical plug gage tolerance is 50% Plus 50% Minus.
  • Master setting disc tolerance is 50% Plus 50% Minus.
  • Cylindrical plain ring gage tolerance is GO (Minus) and NOGO (Plus).
  • Master ring gage tolerance is 50% Plus and 50% Minus.


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