First of all there's a small LIBRARY on which the files below depend. The library contains stuff for tubes, stacking things, drawing screw holes and "flattened domes" which are cylindrical cups with rounded corners.
Next, a few motor designs. The OpenSCAD software only seems to have come with a few stepper motors but not other commonly used electromotors.
So I've drawn these - I'm placing them in public domain for you to use as you see fit. Note that physical dimensions for these motors may vary slightly - these are general averages based on several sites online as well as manual measurements.
