Bore Gauge Setting Ring / Master Rings

Bore Gauge Setting Rings / Master Rings are precision reference gauges used for setting and calibration of measuring instruments such as dial bore gauges, horizontal comparators, length measuring machines, internal micrometers, and other precision measuring equipment.

These Master Rings are widely used in testing laboratories, calibration workshops, and industrial quality assurance applications. They are also used as High / Low Masters for Air Plug Gauges, providing a reliable reference for accurate dimensional inspection and calibration.

• Master Ring Gauges are available in OHNS Steel, Chrome, Tungsten Carbide, and D2 material with Std/Customized XXX/XX/X/Y/Z/ZZ Classes/Tolerance.
• Ring Gauges are lapped to size and hand polished to provide superior accuracy, roundness, cylindricity, and wearability.
• Manufactured to the high end of specifications to provide maximum wearability according to customer requirements from Dia. 1.5 - 600 mm Range.
• Subzero treated at -80°C for Dimensional Stability.
• Calibrated at 20°C under Standards Room conditions.
• Gauges are delivered in plastic case, providing anti-corrosion effect and impact resistance with Calibration Certificate (NABL/NPL Accredited).