Bearing

I made two of these bearings for my Ender 3, to mount the spool, so it runs smooth and doesn't make additional noises. But you can also use this bearing for other projekts.

Make shure, that this part is compatible with your filament spool (must be over 70 mm)

Inner diameter: 37 mm
Outer diameter: 70 mm
Thickness: 18.5 mm

Use the raft only for the bearing, the guides can be printed without a raft.

The rollers can fall out, but the guide prevents this, when fully assembled, it stays in place.

Assembling the two guide parts could take a bit of force.