Printed bearing, non-printed balls

By avoiding the need to print the spherical balls necessary for a ball bearing, I my design is nearly as small as a stock 608 bearing.

This is still a proof of concept, and not meant to immediately work. The little plastic tab does not adequately fit into the slot on the outer ring. In a further redesign I would shrink both rings to exactly match the dimensions of a 608 bearing and move the hole for filling the bearing to the inner ring.

For the spherical balls inside I tested the small