Video of the finished bearing: https://www.instagram.com/p/BPA0LYlDdlO/?taken-by=mivia.dk
I wanted to create my own ball bearings for my filament rolls, and have experimented with the details. The outcome is this design, which is ready to print without additional support structure.
Simply snap off the support after printing.
If your printer is not precise, the tolerances may be too low for this print, resulting in balls stuck to the sides of the bearing.
Outer diameter: 54mm
Inner diameter: fits a 22mm rod
XYZprinting da Vinci 1.0 PRO 3-in-1
0.4mm nozzle, 0.2mm layer height
Do NOT print with support.
The print is prepared with support cones underneath each ball, which should snap right off after the print is completed.
If you use a different layer height, you may experience problems with the connection between ball and support is too strong and wont snap off.