Sheave by forged and molded, with light weight, large bearing capability, good wearing resistance and long life Sheave features: 1) Material: Q235B, Q345B, 35#, 45#2) Groove surface quench: HRC45-553) Groove surface quench depth: ≥2mm4) Max processing diameter: ≤2,000mm5) Low production period Sheave for Oil Drilling Rig