Small Motors
Small motors use a fraction of a horsepower, or 745.7 watts, of power to run. They consist of four basic parts: the axle, enclosure, nylon end cap, and two battery leads. The motor spins in opposite directions when the battery leads are switched. Although they are suitable for many uses, small motors are primarily used for torque applications.
Small motors are used in many industries and often need to be customized. They are used in welding, small centrifuge devices, pitching machines, wheel chairs, door openers, pumps, and frozen yogurt machines, among other uses. The internal configurations of small motors vary depending on the purpose for which the motor is used. However, all small motors use electrical power to rotate, powering the devices to which they are connected.
Small motors can be brush or brushless. In those units with brushes, the brushes transfer power from the battery to the commentator. The speed at which the motor rotates is proportional to the voltage it receives, while the torque is proportional to the current it receives.