Filament Hub
thingiverse
Filament Hub (UPDATE) - An expanding hub you insert into your filament spools to allow them to rotate easier and helps to stop drifting along the filament bar. Printed for a Zmorph Fab printer which has a 12mm diameter filament holder. It floats freely so should be good for any bar of 1/2 or so. The filament diameter is springy from roughly 52mm to 59mm so it seems to work with many filament spools. The new Filament_59-30V2.stl is a redesign. I separated all spokes rather than group them in 3's. The result is a springier version. Size is a max of 59mm.
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