Designed this coupler for my broken Z-Axis coupler. The 5 mm hole is suitable for NEMA 17 stepper motor shaft and the 1/4 inch is for the ACME threaded rod.
Now Version 1.1 includes some minor tweaks such as:
1) A middle notch to improve the clamp flexibility.
2) M3 hex nut cutouts to make tightening the clamps convenient and easy.
3) A dimple on the 5 mm hole for steppers with flattened shafts. (Note: as requested, couplerV1-1_forRoundShaft.stl is for non flattened shafts)
Youtube video link: 3D Printing Time lapse, Printrbot Z-axis coupler
Requires 4 pcs of 12 mm long M3 Hex screws and nuts.
Print Conditions:
Layer height: 0.1 mm
Fill: 30%
Wall thickness: 1 mm
Brim: 20 mm
| Coupler.stl | 131.7KB | |
| couplerV1-1.stl | 149.5KB | |
| couplerV1-1_forRoundShaft.stl | 148.5KB |
