3mm x 26mm airsoft ball bearing
thingiverse
First time I have played with airsoft and not damaged some thing. Carefully glue with acetone around the out side. very light and check for penetration. any globs will be a bump to get past. trim along the raceway and assemble. put the inner race inside the one of the outers and load it with 7 balls.snap the other half down - eveyone I have made held together by itself at this point. if it spins freely enough glue it carefully. check out its daddy the 20mm x 40mm fidget ring
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