At the heart of most mass produced electric motor systems is a gear motor. These are simply a combination of a DC electric motor and a gearbox . The idea of making a gear motor is conceived whenever a gearbox & dc electric motor manufacturer decide that there is a need for them, due to repeat & similar orders from companies, all requesting the same thing. A forward thinking company will then manufacture a gearmotor, a static amalgamation of the desired gearbox & dc electric motor.

The reason for doing such a thing is simple, it will be cheaper to mass produce the combinational gearmotor than the gearbox & dc electric motor separately, furthermore it will also be tailored to specific purposes (say one or two, no more), and thus require less time to set up. Finally, whilst there is one or two designated systems for which it can be used it, they can be used elsewhere, as the drive shaft (the only customisable element of our system) can be designed to fit both the gear motor & to the appliance the gearmotor will power.

Of course, there are disadvantages, as with any system. The first is that unlike a custom system if - say - the gearbox goes wrong, but the DC Motor is fine, then you have to replace the whole system. Nevertheless the time taking configuring the gearbox could negate any savings made. Furthermore, support may not be available (or it may be woefully lacking) should you have problems using the gear motor in a custom built system.

When using your gearmotor, you can modify it to your own personal needs (for example gear ratios and arrangement can be changed). I would also recommend positioning it in a place that's easily accessible should problems occur or modifications needs to be done.

If you are looking for cost effective gear motor for your need, why not hung the website of http://www.speedreducer.org/