A belt drive is a mechanical system that uses a flexible belt to transmit power between two or more rotating shafts. This system is commonly found in various machines, such as cars, bicycles, and industrial equipment. The belt can be made from materials like rubber or fabric, and it connects pulleys, allowing for efficient power transfer while reducing wear and tear on components. Belt drives are advantageous because they can absorb shock and vibrations, making them suitable for applications where smooth operation is essential. They also allow for easy adjustments in speed and torque by changing the size of the pulleys. Overall, belt drives are a reliable and cost-effective solution for power transmission.