Bearing scaled up to fit a filament spool
thingiverse
Bearing scaled up to fit a filament spool on the outside (d = 74 mm) and my spool holder rod (d = 30 mm) on the inside. It is terribly loose since I only scaled and cropped it without considering the relative changes of tolerances, so the insets can actually be taken out with a bit of wiggling. It still somewhat works and has improved my prints...
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