I made this little bracket to more easily hold the rolls of PolyMaker filament (and other similar ones) that I've been using recently. They just barely fit inside of the storage boxes I use, so keeping the spools centered is important if I want to reduce drag on the bowden tube. The bracket is a press fit into the cardboard and makes it easier to put a post or dowel through the center.

I've uploaded 3 different versions:

• 22mm Inside Diameter - For pressing a 608 bearing inside of. This could be handy if you've got a big spool of filament and you want to make it easier on your extruder motor.
• 10.5mm Inside Diameter - good for a 10mm dowel or rod
• 8.5mm Inside Diameter - good for an 8mm dowel or rod.

I have this parameterized in Fusion, so I can produce different sized holes through the middle. If you have some other size you would prefer, I'm happy to upload another version. It's also worth mentioning that this will fit more than just Polymaker spools. I've tested it on eSUN as well and those also seem to be compatible. Anything with a 55mm inner diameter on the spool will work.

Print Settings:

• Material - ABS
• Nozzle - 0.4mm
• Layer Height - 0.2mm
• Supports - nope