Thingiverse
Bio-hazard trispinner
by GenErik
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It uses a 608 skateboard bearing, 3 5mm diameter screws, and 3 13mm diameter balls.
You have to print two of the halves and then bolt them together, enclosing the three balls and the bearing.
You have to print two of the halves and then bolt them together, enclosing the three balls and the bearing.
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