[GCR15 BEARING STEEL] Constructed from GCR15 bearing steel. This material provides structural stability and wear resistance for standard machining environments.
[CALIBRATION STANDARD] Designed as a master setting reference. Used for zeroing and calibrating bore gauges, inside micrometers, calipers, and other internal measuring instruments for quality control in manufacturing.
[LASER-ENGRAVED MARKINGS] Features laser-engraved specifications on the gauge face. This identification method resists fading with standard handling and wiping in machine shops.
[GROUND AND POLISHED FINISH] The inner bore undergoes grinding and polishing processes. This contact surface is designed to minimize friction during tool insertion, protecting the ring gauge and measuring instruments from wear.
[MAINTENANCE & TRANSIT] Each gauge is coated with rust-preventative oil and packaged for transit. Wipe the gauge clean before measurement and reapply protective oil prior to storage to maintain dimensional specifications.