Composite rigging sheave Click here to enlarge imageHere's a sealed bearing composite rigging sheave. The new sealed versions come with a yellow safety cover vs. the high visibility orange on the firm's standard model. The bearing system inside the new sealed sheave features an aluminum bearing hub that seals the bearings from any outside element or intrusion. Testing has proved this sealed bearing system to provide up to 3 years of continuous use without any bearing wear. This eliminates the worry of whether the operators have greased the bearings, causing them to fail prematurely, the maker points out.All rigging sheaves are corrosion resistant. The side loading gate system mak...

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