The main components of sheave material requirements: castings shall comply with GB11352 1200 sinking sheave manufacturer, subject to annealing prior to processing; steel structure wheel's appearance should be smooth, without cracks sales sinking Day 1200 wheel, rope groove working surface may not have perforations, shrinkage of defects affecting performance. 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.