Caged Ball Bearing
thingiverse
A clarification: due to recent occurrences on eBay, I must emphasize that my STL files, designs, and photos are not for commercial use. I revamped my first ball bearing (http://www.thingiverse.com/thing:56298) by adding 8 balls and a cage for improved separation. A video (http://www.youtube.com/watch?v=CCsoIQ4pXQ4) showcases the enhanced functionality of the bearing. For optimal printing, use a layer height of 0.1mm with a well-calibrated printer. Deburr all parts, particularly the cage, for smooth operation.
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