A two piece garden hose roller guide with a print in place core.

Print instructions

See the attached 3mf for all the settings I used.

Your printer should be reasonably well tuned so you get a nice friction fit between the spike and roller core. The roller to roller core gap of 0.3mm shouldn't be a problem.

You want supports on the pointed end of the spike. No other supports are needed unless you want to avoid the following but that would create an enormous amount of support.

When sliced at 0.2 layer heights use variable layers to print layers 56.6 - 62.0 at 0.1 height. If you don't you'll likely get a mess in this area as the outer perimeter will be a complete overhang. A larger nozzle may also help but I didn't try that.

I also used three perimeters but I don't think that's strictly necessary.

[edit 2025-05-17] Added STEP files