This is a 3D printed Wire Race bearing.
Full metal bearings are awesome, but for custom sizes or for large diameters they tend to be very heavy and expensive.
3D printed full plastic bearings are so nice because, well, DIY, but they suffer from heavy wear and tear.
This hybrid, inspired by the products of FRANKE, tries to find a middle ground between the two.
Check the rest of the playlist for the tools designed and created for manufacturing the wire races.