3D Printable 608ZZ Bearing
thingiverse
608ZZ Printable bearing. Used with https://www.thingiverse.com/thing:3209211 in my example. My filament with real bearings would freespin and tangle the filament around the spool. Since printed bearings are a little more restrictive, this is perfect for this application. Support is included in print. There is a ring around the bearings, print with that side down. Remove after printing, work bearing for a decent bit. Added various sizes of the bearings. 4.5mm is the default size, fully tested. Depending on your printer you can go with larger or smaller bearings.
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