The Micro Gear Motors by Ever-power provides hobbyists and robotics Conveyor Chain enthusiasts with an inexpensive solution with their motor requirements. The micro gear electric motor is capable of supplying up to 1650g. cm of torque; with this kind of a small size, these fantastic small motors hold their personal against complicated and demanding tasks. Have a look beneath the specifications tab to find out more on buying and torque/rpm figures.
Also available may be the MB7 
Bracket, which is featured in another of the product images and may make mounting the apparatus motor a simple task, requiring simply two screws to attach the assembly on your application.
All of the micro steel gearmotors possess the same physical sizes, so one version could be easily swapped for another if your design requirements change.
Long (9mm), 3 mm-diameter D-shaped metal output shaft.
4.5mm long, 1mm diameter back again shaft, ideal for optical encoders!