Precision grade 25 bearing balls Hardness: Rockwell C 60-67 Chrome steel balls are hardened and cannot be drilled or tapped Country of origin: Switzerland

Grade 25 chrome steel bearing balls are widely used in precision ball bearings as well as most aerospace, Transportation and industrial applications. Chromium (CR) has a tendency to increase hardness, toughness and wear resistance of steel. Chrome steel is a chrome Alloy carbon steel, not a chrome plated steel.