R2D2 new middle foot with steel balls
thingiverse
This replacement part, designed to replace "R2D2 - This is the Droid You're Looking For," can be found at http://www.thingiverse.com/thing:1205821. A notable improvement over the original design is the use of four steel balls instead of plastic dots. The balls are specifically chosen to fit snugly into 1/2" (12.7mm) gaps, which can be sourced from http://www.gap-kugellager.de/Kugeln-Stahlkugeln-DIN-5401/Stahlkugeln-887.html. When properly seated, the steel balls rotate freely due to a press fit design.
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