Filler - Self Centering Roller Remix

This self-centering roller keeps your cardboard spools from walking off the holder while still featuring a wide flat section to accommodate spools that have a flat interior perimeter. The interior is hollowed out to cut down on print times. I tested this by spinning a fully loaded cardboard filament spool on it as quickly as reasonable. Even when I deliberately started it off centre or at an angle it always found its centre again quickly. The principal is similar to how train wheels have a slight angle to keep them centred on the tracks. I hope you enjoy this design and be sure to post a make when you finish making it! If you are interested in this design you might also be interested in my other Filler remix here: https://www.thingiverse.com/thing:5267457