A belt drive is a mechanical system that uses a flexible loop, typically made of rubber or fabric, to transmit power between two or more rotating shafts. The belt connects pulleys, allowing motion and energy to be transferred efficiently. This system is commonly found in various machines, such as cars, bicycles, and industrial equipment. Belt drives are advantageous because they can absorb shock and reduce vibrations, leading to smoother operation. They also require less maintenance compared to other systems like gears. However, they may slip under heavy loads, which can affect performance. Proper tension and alignment are essential for optimal function.