I adjusted the original scad file from MobyDisk found here http://www.thingiverse.com/thing:673563.
It now supports side cutouts, to fit my Solarbotics GM8 Motors.
I used the adapters with my Arduino Lego Bot and also printed Mecanum Wheels on my Ultimaker2.
For the rollers of the wheels I used NinjaFlex http://www.thingiverse.com/make:157514
LegoAxleToMotor.scad | 3.8KB | |
LegoAxleToMotor.stl | 111.3KB |