Vex to stepper motor adapter hub

thingiverse

*** Updated cover to r3 -- adds through hole for easier motor shaft extraction. Print without supports, because easy-breakaway supports are already in the model! I wanted to use an old set of Vex wheels for my upcoming rover project. They use an annoying square axle, which is incompatible with standard DC motor shafts. Well, not anymore! This pair of pieces should allow me to mount the wheels to any stepper motor with a 5mm shaft. It has capture features for the M3 screws which are used to hold onto the shaft, and recesses for M4 nuts to clamp the wheel onto the hub.