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At the heart of most mass produced electric motor systems is a Gear motor. Gear motors are simply a combination of a DC electric motor and a gearbox (hence the name gear motor). 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 gear motor, 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 gear motor than the gearbox & dc electric motor seperately, furthermore it will also be tailored to specific purposes, 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 can be designed to fit both the gear motor & to the appliance the gear motor 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 gear motor, you can modify it to your own personal needs. I would also recommend positioning the gear motor in a place that's easily accessible should problems occur or modifications needs to be done.
Welcome to the website:www.bosacmotors.com. I'm sure you'll find something that will suit your needs.