Rigid Z-Coupler

This is a rigid coupler for 5mm to 8mm Z-Axis motor to leadscrew coupling. Because it's plastic it's not really rigid - so you get the best of both worlds. When it rotates it acts rigid but it auto-centers the two shafts and allows for some misalignment.

Built with PETG using no support and 20% infill. Use more or less infill for more or less rigidity. The Z axis rotation will be tightly coupled no matter what. The screws are M2.5 and they require nuts.

The Rhino file contains the source - which produces results by solid subtraction. Thus you can change diameters and hole indentations by moving the negative space.

This is a remix of https://www.thingiverse.com/thing:3039679 which didn't have two indentations and had no source file.