A gear drive is a mechanical system that uses gears to transmit power and motion between different parts of a machine. Gears are toothed wheels that interlock, allowing them to transfer rotational force efficiently. This system is commonly found in various applications, such as vehicles, industrial machinery, and household appliances, where precise movement and speed control are essential. The primary advantage of a gear drive is its ability to change the speed and torque of a rotating shaft. By using different gear sizes, a gear drive can increase torque while reducing speed, or vice versa. This versatility makes gear drives crucial in systems like automobiles and robotics, where performance and efficiency are key.