Pulley blocks are assemblies that consist of a hook or shackle, swivel, bearing, sheaves, sprockets, pins and frame. They are suspended by a hoisting rope or load chain and are designed for a variety ...

When a rope, cable or belt runs along the groove ... Lifts, window blinds and cranes often use pulley systems. Let’s change gear to look at gears. Gears are also wheels attached to a fixed ...