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Involute Elliptical Gear Fidget Toy — image 1

Involute Elliptical Gear Fidget Toy

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Involute Elliptical Gears. I use it as a fidget toy.

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GNU General Public License v3.0

Involute Elliptical Gears. Ellipse needs to be sized divisible by the tooth pitch, which required a number of formulas to work out. Those formulas are in the sldprt file so you can change the teeth or make it for a different size bearing. I used a 685 bearing cuz I had them lying around. 

print 2 arms and 2 gears and assemble using 685 bearings to have a fidget toy. Or change the gears around. The sldprt file is parameterized.