Since the motors usually have quite a high speed, while the rotation speed is quite small, one must use a gear motor. For example, a normal motorcycle engine spins at a few thousand rpm, while the wheel only spins at a few hundred rpm. The industrial machines also need to rotate at a slow speed to fit the workers’ operation, while the electric motors rotate quite quickly. When using a gearbox motor, we can adjust the speed of rotation quickly or slowly depending on the gear ratio of the engine to facilitate work response.