Sheave: sheave wheel assembly. Spoke webs using welding Shaanxi fixed sheave, all welded parts should be close to Shandong fixed sheave, welds should foot high, flat, does not allow cracks, slag, burn and other defects. Sheave assembly in vitro circular rear end face of the base and rim centerline axis radial runout and face runout should not be less than GB1184 of 12 accuracy. Sheave: sheave wheel assembly. Non-machined surface sheave (except rope outside the tank) should be coated with anti-rust paint Inner fixed sheave, paint should be uniform, without cracks, peeling, bubbles and flow marks and other defects. Sheave test: test method with visual appearance of the product quality and assembly quality, when necessary, can be about 10 times the magnifying glass or inspection hammering method.