In a mechanical system, you can use the gear speed reducer to change the output and motor speed and reduce the load inertia. Please refer to the following figure and the equation shown below. For example, if the load inertia is equal to 1000Kg x m2 and a gear speed reducer with a speed ratio of 5:1 is used, the load inertia can be decreased to 40 Kg x m2. If the load inertia is equal to 1000Kg x m2 and a gear speed reducer with a speed ratio of 10:1 is used, the load inertia can be decreased to 10 Kg x m2. Under the same mechanical conditions, if the operating speed of the machine is fixed, the required motor output torque will decrease in accordance with the decreasing load inertia. When this situation occurs, please check if the motor speed has reached its upper limit (3000 rpm or 5000 rpm). If the motor speed has not reached its upper limit, using a suitable gear speed reducer can decrease the load inertia and enhance the motor speed. In addition, when a gear speed reducer is used, you can choose a motor with a smaller rated output power to help achieve optimum system performance.