A gear reducer, also known as a gearbox or speed reducer, is a mechanical device that reduces the input speed from a motor while increasing the output torque. It works by using a set of gears with different sizes and ratios, allowing high-speed, low-torque input to be converted into low-speed, high-torque output.

Gear reducers are widely used in industrial machines, conveyors, robotics, and other applications where precise speed control and strong torque are required. By adjusting the gear ratio, they help improve efficiency, protect machinery, and ensure smooth operation.