QD Bushings (shortening for Quick Detachable Bushings) are designed with a split central to the taper and flange. The bushings are used on pulleys, sheaves, and sprockets, especially when more clamping force is needed on standard bore-to-size bushings
. They are designed using hardened materials such as high-quality steel that have high torque capability of between 1500 and 20,000 pounds. The primary advantage of QD bushings
is that they are interchangeable with other shaft-mounted components. Their shallow tapers provide a high mechanical advantage for assurance of dependable clamping to the shaft. This is the primary reason why they are recommended for mounting high capacity synchronous belt drives, v-belt drives, and roller chain
drives. Because QD bushings have narrow sprocket hubs, they can help to stabilize the overhung load. Besides, they require high clamping force that helps to reduce the need for key ways on non-drives. Therefore, they are preferred for a diversity of industrial and commercial supplications.