Parametric Filament Spool Adapter
thingiverse
Customizable filament spool hub adapter that can fit any filament spool or axle size perfectly. The hub adapter features a gentle taper, making it effortless to insert into the spool, and slight oversizing is not a concern - you can even get away with making it slightly too large and still manage to fit it securely onto the spool. This design eschews tolerances altogether, so make sure to create the Axle Diameter slightly larger than the actual axle diameter for a seamless fit.
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