A belt drive is a mechanical system that transmits power between two or more rotating shafts using a flexible loop called a belt. This belt is typically made of rubber or other durable materials and is looped around pulleys attached to the shafts. Belt drives are commonly used in various machines, such as automobiles, conveyor systems, and industrial equipment, due to their simplicity and efficiency. Belt drives can be classified into two main types: open and crossed. In an open belt drive, the shafts rotate in the same direction, while in a crossed belt drive, they rotate in opposite directions. These systems are favored for their ability to absorb shock and reduce vibration, making them suitable for applications where smooth operation is essential.