Anycubic I3 Mega S spool holder

thingiverse

As everyone knows the Anycubic i3 Mega S comes equipped with a built-in spool holder. Unfortunately, I've encountered some filament spools with smaller inner diameters and/or larger widths that don't fit on the spool holder. My initial temporary solution was a round piece of wood. Now I have designed an enclosed filament holder mainly consisting of a threaded bolt which holds the filament spool and a nut that keeps the spool in place. I've added a small M3 thread to the nut that can be used to protect the nut from getting loose during printing. After the first print with standard tolerances, it was extremely difficult to get the nut and bolt to slide smoothly. It took me 30 minutes, some oil, a steel brush, and plenty of patience. After that, I increased the clearances of both the nut and the bolt by 0.1mm, but I didn't test it further. The enclosed files contain the version with larger clearances. If it's still too tight, please let me know.