Reuleaux Triangle Bearing Gears - 3D Printable Fidget Toy

Busy hands, calm head.

21k downloads in the maker community

$25.07

Color: Gray

Printed in the USA when you order.

1.You order it
2.We print it fresh
3.It ships to you

Functional planetary gear set based on Reuleaux Triangle bearings and constant-width shapes
Mesmerizing mechanical fidget toy that looks impossible but actually works
Modular design prints as individual components for easy assembly post-print
Perfect desk toy for makers, engineers, and fidget enthusiasts
Print on demand — delivered ready to assemble and use

Experience the magic of impossible geometry with this functional Reuleaux Triangle Bearing Gears set. Based on fascinating mathematical principles of constant-width shapes, these planetary gears create a captivating fidget toy that defies expectations. Watch as the gears mesh and rotate in ways that seem to violate the laws of mechanics—but they work perfectly.

This mechanical toy combines engineering precision with fidget-spinner appeal. The modular component design ensures reliable printing and easy post-print assembly. Simply flex the external ring gear to snap components together. Ideal for makers, STEM enthusiasts, and anyone who loves hands-on mechanical toys that spark conversation.

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