Bearing-Driven Tri-Lobe Fidget Spinner
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Description
A classic three-lobe hand spinner, the shape every desk drawer has seen, rebuilt around a real 608 skate bearing so it spins freely for a long time. The body has a bearing pocket in the centre, a lip underneath to hold it, and weight-saving holes in each lobe. Two small caps press into the bearing's inner ring from either side to make the finger pads.
Notes
- You need: one 608 bearing (8 × 22 × 7 mm).
- Print: body flat; the two caps print flat-side down beside it. No supports.
- Assembly: press the bearing into the pocket from the top, then push one cap in from each side until they meet.
- Tuning: if the bearing is loose or tight in the pocket, adjust the pocket diameter slightly.
- Remix: the lobe holes can be enlarged to take 608 bearings as extra weights.
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