In order to change the speed (RPM) or the output torque of a motor, a mechanical device needs to be used – a gearbox. The shaft of the motor is attached to one side of the gearbox and offers a given torque as output and speed which is determined by the gear ratio, through the internal arrangement of gears within a gearbox.
There are several types of electric motors which include alternating current (AC) motors, direct current (DC) motors, and universal motors. All kinds of industries are required to install some type of motor as part of the driving force behind their production line. Modern technical development has made available a wide variety of electric motors for industrial use.