are grooved wheels. They have an axle or bearing so they can spin, allowing ropes to move without creating friction that could wear or tear down the cable. It is a common misconception that a sheave is the same as a pulley. A sheave is a component of a pulley system. It is commonly found inside the pulley, which holds a rope or cable. Sheaves come in varying configurations and designs, which are separated and segmented into different types. QD bushed sheaves, or Quick-Disconnect sheaves have a flanged design for faster installation and easier maintenance. Some of the QD bushed sheaves that you can get from MRO Supply are Browning BK55H, Browning 2BK80H, and MasterDrive 2AK84H. We also carry other bushed sheaves from Dodge, Jason Industrial, MasterDrive, and TB Woods. Contact us for bushing and sheave compatibility.