Quick change spool holder

Yet another spool holder.

Not sure if what I wanted wasn't yet designed or I simply couldn't find it, so I mashed up my own.

The idea was to have a quick change spool holder so the spool can be changed without taking off 6 nuts and 18 washers from a threaded rod and losing half of them in the process. There are multiple such holders but most of them don't use bearings, and I really wanted to have a smooth rolling spool which only bearings can provide. Having a plastic spool weighing over 1kg rolling on a bare steel threaded rod would certainly make it wear and drop plastic shavings down onto the print. Not a good thing. Also, other holders were unnecessarily long and having two spools at once would not be possible with those on my printer. Two-colour printing is becoming more and more common, so why not.

Not my design, I simply took existing designs and changed them to my needs. Hope this helps others.