Outer diameter is 490mm with tolerance +/-0.05,
Inner diameter is 470mm with tolerance +/-0.05,
In order to avoid the ring out-of-round during machining, several fixture gauges were designed. Finally get very good quality finished parts, run-out and concentricity are within 0.05.
Application of 65Mn under different condition
65Mn is a Chinese standard low-alloy, high-carbon manganese spring steel. Its key characteristics are: Good Hardness and Strength: After heat treatment, it can achieve