8mm shaft collar

Printed collar made to fit any 8mm smooth rod.
I used this specifically on my Printrbot Spool holder in place of the crappy wood one that would always fall off.

Just need one 3mm nut and a M3 x 10mm screw, I used one of the screws that held the two halves of the wood collar together.

Print with 2 shells and minimal infill. I got away with 15%.

It should be a snug fit.