NEMA 17 to Quadrant Drive shaft adapter
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Adapts a NEMA 17 stepper motor shaft to what I call a Quadrant Drive
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Adapts a NEMA 17 stepper motor shaft to what I call “Quadrant Drive”, which transfers torque in a way that is very fitting for 3D printed parts (strong, 50% of the “meat” of the material is used unlike many drive systems that mostly just rely on a perimeter), impossible to strip short of complete destruction, is genderless, and scale-intolerant (which means you can connect big things and small things and it doesn't care, you can scale a 3D printed part that you connect to and not have to make any changes to get it to connect).
You can print it with the taper-side down and not need any supports.
This version just presses directly onto the shaft for simplicity. Future versions may make use of fasteners to tighten onto the shaft more robustly and removably.
This is part of this project but can have other uses as well.