Solarbotics GM10 81:1 Geared Pager Motors are a bit funky in that they're not continuous rotation by default. They have a self-centering spring, so applying DC power will result in a 60 degree swing in one direction. Reversing power swings the output arm 60 degrees the other way. Remove the self-centering spring and clip the stops, and away you go! The square output shaft measures 0.14" per side.
You want to install the motors a distance away from the controller? These come with 12" stranded wire leads!
