Iakov Davydov<p>I designed a bolt with a Reuleaux triangle shaft that turns inside a square nut.<br>It’s a strange bit of geometry that actually works—thanks to the constant-width shape.</p><p><a href="https://www.printables.com/model/1278549-impossible-reuleaux-triangle-bolt-with-square-nut" rel="nofollow noopener" translate="no" target="_blank"><span class="invisible">https://www.</span><span class="ellipsis">printables.com/model/1278549-i</span><span class="invisible">mpossible-reuleaux-triangle-bolt-with-square-nut</span></a></p><p><a href="https://mstdn.science/tags/3DPrinting" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>3DPrinting</span></a> <a href="https://mstdn.science/tags/ReuleauxTriangle" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>ReuleauxTriangle</span></a> <a href="https://mstdn.science/tags/WeirdMechanisms" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>WeirdMechanisms</span></a> <a href="https://mstdn.science/tags/Geometry" class="mention hashtag" rel="nofollow noopener" target="_blank">#<span>Geometry</span></a></p>