Heaviest(?) Fidget spinner - 10oz (283g)
thingiverse
This fidget spinner is engineered to give the greatest moment of inertia possible. Read the "How I Designed This" section for more information. My own build utilizes steel weights, tipping the scales at 10oz (283g), but if you have the means for tungsten it would be around 19oz (539g) and over $90 in weights. Even with the steel weights, I have not been able to find another spinner with greater mass. After hand spinning, I timed a spin at 4m 10s with a hybrid bearing. Hardware & weight: 35x 1/4oz (3/8"dia x 1/2"h) steel cylinder pinewood derby car weights OR 1/2oz tungsten weights 1x 608 bearing of choice 8x M3x16mm bolt 8x M3 nut
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