Reduction gear box is used to reduce a mechanical system's speed and/or torque. The planetary gearbox, which has a sun gear, a ring gear, and one or more planet gears, is the most popular kind of reduction gearbox. The ring gear is fixed on the housing, and the planet gears around the sun gear. The output shaft is connected to the sun gear, while the input shaft is connected to the planet gears. The number of teeth on the ring gear and sun gear affects the ratio of input speed to output speed. Reduction gear box is made up of iron and steel.