The assembly and animation are all done in geometry nodes.
I’m still not sure what this would be used for.
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It’d make a heck of a spice grinder 
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It’d be a pretty good finger remover
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Great animation. In the real world, it seems closest to a “universal joint.”
Correction: An automobile “differential.” Which is a magical thing that allows one wheel to rotate faster while taking a curve than the other one does, while being driven from the same power-shaft.
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What a wonderful contraption, I wonder if it has some basis in real life.
It would make for a good nutcracker probably.
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Very nice! Cool animation idea. 
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I featured you on BlenderNation, have a great weekend!