Thingiverse
Non Round Roller
di WICAD
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My drawing and 3D print of a non round roller, also known as a solid of constant width. Print a few and place them on a flat surface under a book. The book will "roll" as if there are ball bearings under it yet the objects are not round. The circle is not the only curve that is of constant diameter. This is the Reuleaux Triangle roller.
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