Fixable spool hub for quick filament change
thingiverse
I spent a year testing multiple designs, but each one left me frustrated. This hub attaches to a spool via three M5 screws and features 608 bearings on both sides. Simply place it on an 8mm rod and you're ready to go. It's perfect for users who need to switch between multiple filaments regularly. I built the model in the photo using a 6mm Torx screw since I didn't have any M5 screws available.
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