World’s Fastest Fidget Toy — The RipSpinner

World’s Fastest Fidget Toy — The RipSpinner

thingiverse

Features a yoyo-like winding spool to accelerate using a ripcord. Requires: 4 regular skateboard bearings, plus ~1 yard of yoyo string or suitable alternative. WARNING: can spin very fast with considerable inertia. I assume no responsibility for the use of this toy. Bearing weights are kept in place by the spool cap, but always check that all parts fit snugly together before spinning. Be careful not to snag the cord when unwinding.

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