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A taper lock pulley is a part of a mechanism used in power transmission systems, such as belt and pulley systems. Pulleys are wheels in steel with a groove around the outer edge, designed to accommodate a belt. Taper lock bushings are the central parts of pulleys, where the pulley is attached to a rotating shaft or axle. The taper lock bushing allows you to avoid machining your pulley depending on the assembly.
The pulley taper lock is often designed to fit securely over a motor shaft or other rotating axis. Once in place on the pulley with screws, the bushing transmits the rotation of the shaft to the pulley itself, which, in turn, transmits this movement to a connected belt. This allows power to be transferred from a motor or motion source to other parts of a mechanical system.