My BB Filled LM8UU Type Bearings

These bearings take 4.5 mm steel BBs. (Copper might work, but I have heard that they may cause problems due to the metal differences.)

I printed these on a Printrbot Simple in PLA at .25 layer height and 10% Infill.

(I have also tried to print these on a Makerbot Replicator 2 at the Low Resolution with 10% infill, but they had a much lower tolerance. Ie, they turned out very tight and it took a long time to wear the BBs in to their races before smooth travel was possible.)

Dimensi