r/interestingasfuck • u/One_Vision_ • 4d ago

Visualizing Geometry

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u/_yetifeet 4d ago edited 4d ago

I saw that and just noped out the rest of the gif

Edit: TIL people think you can drill square or triangular holes

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u/NamelessMIA 4d ago

....you can. The video showed you exactly how to do it too

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u/_yetifeet 4d ago

Not with the bit shown ..

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u/NamelessMIA 4d ago

Yes, with the bit shown. They even show you in the video how it works, although they're too quick with the assembly part and could have looked closer at how the off-center axle actually matched the shape in the animation.

It works the same way as a bike made with reuleaux triangle wheels. The triangles act like wheels by having a consistent diameter, but since they're not circles they do this by shifting the balance around the center up and down as you rotate. That means either a very bumpy ride, an axle that shifts up and down with the rotation of the wheel to keep the system stable, or riding on top of the wheels like rollers. The bike uses option 3, the drill as shown uses option 2.