The Micro Gear Motors by Ever-power provides hobbyists and robotics enthusiasts with an inexpensive solution with their motor needs. The micro gear motor is capable of supplying up to 1650g. cm of torque; with such a small size, these fantastic little motors hold their very own against complex and demanding tasks. Take a glance under the specifications tab to learn more on ordering and torque/rpm figures.
Also available is the MB7 Bracket, which is featured in one of the product images and may make mounting the gear motor a Drive Chain simple task, requiring just two screws to attach the assembly on your application.
All the micro metallic gearmotors have 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, great for optical encoders!