Thrust bearing with marbles -- can be used for turning tables, ...Fully parametric with OpenSCAD- Choose your size- Number of marbles and their size- Optional hooks to keep it closed- Optional border with screw holesDo not print with hooks in a material which is too brittle, otherwise they might break when you close the bearing (You can increase a bit the 'hClearance' parameter for a looser fit)https://www.youtube.com/watch?v=SsrXiTycCdo