The term 'pulley component' can be summarized as a WHEEL with five letters. A pulley is a simple machine consisting of a WHEEL with a groove in it, and a rope or cable that runs through the groove. Pulleys are used to change the direction of an applied force, transmit rotational motion, or realize a mechanical advantage in either a linear or rotational system of motion. Pulleys are commonly used in a variety of applications, such as lifting heavy objects, moving objects along a track, and providing tension for a belt drive.