Sheave: sheave wheel assembly. Non-machined surface sheave (except rope outside the tank) should be coated with anti-rust paint, paint should be uniform mine hoist sheave, without cracks, peeling, bubbles and flow marks and other defects. Sheave test: test method with visual appearance of the product quality and assembly quality high-lift sheave, if necessary, can use a magnifying glass or hammering method checks about 10 times. Sheave use: do not allow the use of wire rope diameter is greater than the sheave rope diameter allowed. Lift sheave manufacturer when the lifting rope elevation greater than 450, you must recalculate the sheave bearing parts of strength. On the day when you press the wheel mounted sheave platform, in addition to the choice of Atlas bolted outside, but also in the front and rear bearing end welded to a stopper position adjustment wheel with wedge day.