Sheave Features: Mine Shaft Derrick sheave is the top rope adjust the direction of movement of the fixed pulley. Sheave wheel for the whole cast no underlying structure, the use of double row self-aligning roller bearings to fully meet the installation conditions sheave bearing; conducive to the normal operation of Shaanxi sheave 800 fixed sheave, reducing the sheave maintenance workload. Sheave is Mine Shaft Derrick Top adjust the direction of movement of the fixed pulley rope. Tianlun test: Check sheave and parts geometry meets the requirements. Radial runout and face measurement dial gauge, ruler and marking tape sheave rope grooves runout. NDT inspection day axle. Manually rotate the wheel, should be flexible rotation, no abnormal noise.