How Geared DC Motor works: http://www.engineersgarage.com/insight/how-geared-dc-motor-works A geared DC Motor has a gear assembly attached to the motor. The speed of motor is counted in terms of rotations of the shaft per minute and is termed as @RPM .The gear assembly helps in increasing the torque and reducing the speed. Using the correct combination of gears in a gear motor, its speed can be reduced to any desirable figure. This concept where gears reduce the speed of the vehicle but increase

DIY Simple DC Motor / How to Make a Simple dc Motor