Nema 17 Stepper Crank

thingiverse

A compact hand crank designed for a NEMA 17 stepper motor. I sought an effortless method to rotate the Z-axis stepper motor on my Shapeoko 2 CNC machine and created this. The crank is compatible with a 5mm shaft diameter, and requires two 8mm-12mm M3 socket head screws and standard M3 nuts; no additional support needed. An interesting tip: heating the M3 nuts led to a snug fit due to tighter nut slots.