Sheave: sheave wheel assembly. Riveted on mine sheave when installed, it must be combined with surface deburring and rust treatment, rivets and rivet holes should be smooth, size to meet the requirements, are not allowed to use a defective or burnt the rivet, nail heads should be full after riveting Shandong mine sheave, does not allow cracks, dents or other defects nailhead skew. The main components of sheave material requirements: castings shall comply with GB11352 Shaanxi mine sheave, subject to annealing prior to processing; steel structure wheel's appearance should be smooth, without cracks, rope grooves work surface may not have perforations, shrinkage of defects affecting performance.