A brushed DC electric motor generating torque from DC power supply by using an internal mechanical commutation. Stationary permanent magnets form the stator field. Torque is produced by the principle that any current-carrying conductor placed within an external magnetic field experiences a force, known as Lorentz force.
https://en.wikipedia.org/wiki/DC_motor
@user35997 A gear coupled DC motor, a gear coupled BLDC motor, or a gear coupled AC motor: Those are all gear motors.
http://electronics.stackexchange.com/questions/97477/difference-between-a-dc-motor-and-gear-motor
Gearmotor. an assembly composed of an electric motor and a reduction gear in a single unit. The most common types have planetary, planetary-lantern, and wave transmissions. For greater compactness, the driving gear of the reduction gear is mounted directly on the motor shaft. Gearmotors are used in universal drives for general use; they are manufactured serially by specialized enterprises.
http://encyclopedia2.thefreedictionary.com/gearmotor
Small DC motors are used in tools, toys, and appliances. The universal motor can operate on direct current but is a lightweight motor used for portable power tools and appliances.
https://en.wikipedia.org/wiki/DC_motor
The same principle can be used to create an overdrive gear that increases output speed while decreasing torque. Ad. A wind turbine is an example of a very large gearbox. The turbine moves at a slow rate of rotation with a great deal of torque.
http://www.wisegeek.org/what-is-a-gearbox.htm
A DC motor is any of a class of electrical machines that converts direct current electrical power into mechanical power. The most common types rely on the forces produced by magnetic fields.
https://en.wikipedia.org/wiki/DC_motor
up vote 1 down vote accepted. A DC motor is not the same as a gear motor - a gear motor may be an AC or DC motor coupled with a gearbox or transmission. A gear motor adds mechanical gears to alter the speed/torque of the motor for an application. Usually such an addition is to reduce speed and increase torque. A DC motor without gears is useful in many applications, for example the simple fan.
http://electronics.stackexchange.com/questions/97477/difference-between-a-dc-motor-and-gear-motor
Top 10 facts about the world. A gearbox is a mechanical method of transferring energy from one device to another and is used to increase torque while reducing speed. Torque is the power generated through the bending or twisting of a solid material. This term is often used interchangeably with transmission. Located at the junction point of a power shaft, the gearbox is often used to create a right angle change in direction, as is seen in a rotary mower or a helicopter. Each unit is made with a specific purpose in mind, and the gear ratio used is designed to provide the level of force required.
http://www.wisegeek.org/what-is-a-gearbox.htm
1 Ball bearing motor – A ball bearing motor is an unusual electric motor that consists of two ball bearing-type bearings, with the inner races mounted on a common conductive shaft, and the outer races connected to a high current, low voltage power supply.
https://en.wikipedia.org/wiki/DC_motor
A DC motor's speed can be controlled over a wide range, using either a variable supply voltage or by changing the strength of current in its field windings.
https://en.wikipedia.org/wiki/DC_motor
what is a gear motor
A gear motor is an assembly composed of an electric motor and a reduction gear in a single unit.