This is an OpenSCAD model of the Pololu 37D gearmotor http://www.pololu.com/category/116/37d-mm-gearmotors, intended to compare dimensions to a motor mounting bracket.  I did not include the two power terminals on the back of the motor. A sample printout measured within 0.1mm of the real thing everywhere I checked, but please confirm dimensions yourself if you are using it for anything important.I made a mounting bracket for this motor athttps://www.youmagine.com/designs/pololu-37d-motor-bracket