Roulement à billes
thingiverse
I utilize a roller with balls underneath certain spools to simplify rotation (Ender 3) original support. Think carefully about supports via Cura to hold the balls, some post-processing to remove them and then spin it for a nice rounded finish on the balls.
Download Model from thingiverse
With this file you will be able to print Roulement à billes with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Roulement à billes.