SK Steel Ring Gauge Master Ring Gauge +- Tolerance 25.0mm RG-25.0 1 pc

Catalog number: RG-25.0 Features: ●Master gauge for adjusting the zero point of internal diameter measuring instruments. ●Sub-zero treatment and stabilization treatment have been performed to prevent deterioration over time. ●Inspection report included. Uses: ●As a master for internal diameter measuring instruments. Specifications: ●Nominal dimensions (mm): 25 ●Thickness (mm): 14 ●Outer diameter (mm): 53 ●Inner diameter tolerance: ±1.0 μm (1 or more to 30 or less), ±1.5 μm (more than 30 to 50 or less), ±2.0 μm (more than 50 to 100 or less), ±5.0 μm (more than 100 to 200 or less) ●Surface roughness: Within Ra0.1 μm ●Straightness: 0.05/φ100 ●Parallelism: Within 0.015 mm ●Inspection report included ●Circularity: Within 0.5 μm (1 or more to 30 or less), 0.8 μm or less (more than 30 to 50 or less) ●Hardness: 653 to 772 HV Material/Finish: ●Alloy tool steel Note: ●Special sizes are also available