the best spool holder in the world

thingiverse

...well, perhaps the title promises too much - but since I have your attention, let me explain why this is among the better printable spool holders around: Over the years my annoyance over one of my first designs - a simple spool holder (https://www.thingiverse.com/thing:2136555) - grew with every spool change; up to that point that I started using filament that's not suited best for one specific application, just because changing spools would cause too much effort. Instead of working on my attitude regarding what must be a new pinnacle of laziness, I spent some time in modeling a spool holder that really fits my needs. Which are as follows: ) fast-swap spools without twisting knobs with lock-nuts for minutes on a threaded screw ) no threaded screws or bearings ) must fit small (<1kg) and big (>2kg) spools ) centered pivot ) 20mm and 50-60mm spool-hole diameter ) minimal friction ) located inside the print chamber to keep filament dry ) maybe a spring? So a ratchet design holder was born, which uses one of your old printers 8mm (200mm long in this case) rails as a pivoting point. In order to keep everything free of unnecessary friction and bearings, I printed the spool holder parts in nylon which is good enough even for a flimsy direct drive. Some PETG or any other material will probably be ok too. Why that awkwardly and definitely not optimal shaped stationary part? Well. I like the looks, I guess. It's supposed to be wall-hang-mounted with 4x M3-ish countersunk plastite screws. Oh, and you'll also need 2 M3x6 screws for attaching the stick-part into the cone-part. Or some glue. As you like. BTW: accidentally the new spool holder (rotating part) perfectly also fits my old and dumb spool holder (stationary part), so it's more universal than I actually intended.