quick, threaded, self-centering, ball-bearing spool mount

Change spools super fast and easy, without tools! Simple, handy, and 100% printable. works for spools with center hole 22-58mm, and around 50-100mm wide.
SKF 608 ball bearings fit on each side (8x22x7mm), but it will work good without them, too.

I recommend using PLA, ABS may just not have enough layer adhesion to work on these Parts.