Filament Reel Roll

This is a tapered filament reel insert that should fit 3 different sizes from 2.25 in (57.15mm) to 2.34 in (59.4mm) reel holes. I've included the Inventor part if you want to change a few dimensions for your specific rolls.

The inside hole is 0.75 in (19mm) and was plenty big to get any nuts on my reel rod through without any issues. I added tape to my rod so it doesn't wear the plastic out.

I recommend using 1 or 2 mm wall thickness and 20-25% fill. You want it to be a little flexible so it pops in the roll and stays in. The rounded curves should help it stay in!