Self-centering tapered-thread Z-axis coupling 8/5 mm

thingiverse

In this revised design, I swapped out the mysterious exotic thread from the original concept with a more standard Whitworth pipe thread, and added a hexagonal component in the middle to allow users to secure the coupler using a wrench while tightening the nuts. This modification also resolved the issue of properly tightening the nuts with the original design, eliminating that problem altogether. I suspect the drawback of this self-centering coupler is its limited applicability - it only makes sense on a motor shaft without a flat area for a grub screw, which unfortunately is a common feature among stepper motors.