Free 3D-printable models designed by Zheng3
Tinkeriffic Bearing

Tinkertoy-compatible.

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Like its predecessors, this Tinkertoy-compatible bearing system uses ten 4.5mm BB's to provide smoother rotation than the stock wheels included with a Tinkertoy set. The center bore is just a little loose on a Tinkertoy rod (not renowned for their precision diameters in the first place) so if you really need the bearing to stick fast I recommend using a little piece of painters' tape around the rod.

It's modeled in three parts for ease of assembly, but you'll need to super glue the two halves together.