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608 Bearing using BBs
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This STL prints the inner and outer races for a 608 (skateboard) bearing that uses 10 BBs as the balls.
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Model information
- Source
- Printables
- Category
- Mechanical Parts
- License
- Creative Commons — Attribution — Noncommercial — NoDerivatives
Surprising quality with little runout and friction. Race curvature is just 40 micrometers larger than ball radius. Used PrusaSlicer 5.1.2 at 0.20 layer, PLA and with concentric fill, top and bottom pattern (set in Print Settings>>Infill). Used Match Grade BBs, but any will work OK. Add a small dab of white lithium grease for best performance. Capture inner race on 5/16" bolt and two nuts, and chuck in power drill to run in a bit. Designed on FreeCad.