Vex to stepper motor adapter hub

pinshape

*** 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 rover project and they just won't work with standard DC motor shafts. That's all over now! This pair of pieces lets me mount the wheels on any stepper motor with a 5mm shaft. It has capture features for M3 screws holding onto the shaft, and recesses for M4 nuts clamping the wheel onto the hub. Instructions: Print without supports! I uploaded r2 models to deal with some problems: hub cover screw holes are recessed so you can use a M3x25 to clamp over the wheel. Otherwise, you'll have to go with M3x30 and have excess threads sticking out. widened the captive nut slots a little to make insertion easier. added another concentric ring for support material Press 3 M4 jam nuts into the recessed areas of the hub. Press 3 M3 jam nuts into the capture slots near where the motor shaft will go. I recommend drilling through the Vex wheel as well so you can get the hub closer to the bearings in the stepper motor. Remove the two concentric rings under the "hub adapter M3" part. They should peel away easily due to the way I modeled them. Screw 3 M4x25 screws into the hub to clamp down on the wheel, and then screw 3 M3 screws to hold onto the motor shaft.