A pulley is a simple machine consisting of a grooved wheel and a rope, belt, or chain that wraps around it. Pulleys are used to transmit mechanical power and motion between rotating shafts or to change the direction of force applied.
The benefits of pulleys include mechanical advantage (increased force or speed), versatility in various configurations for different applications, ease of installation, and low maintenance requirements. Pulleys find wide usage in industries such as manufacturing, construction, transportation, and material handling systems to facilitate lifting, lowering, or moving loads efficiently.