This design was inspired by a 3D-printed insulator I saw pictured on the blog of fellow amateur Matt Carr, KM4NMP. He didn't post the design files, so I decided I would revisit my somewhat rusty OpenSCAD skills and try to make a remix of Matt's insulator from scratch.

The trickiest part for me was figuring out a good way to make a hole with rounded (chamfered) interior edges. The method I found should prove useful in future projects.

I sliced and printed this in PLA with 0.2 layer thickness and 15% infill. For very long runs or very heavy wire, you may need to increase these parameters for greater strength.

The insulator proportions are fixed, but the overall length and hole size are customizable.

Monoprice

Mini Delta

No

No

0.21

15