OK, getting very frustrated with trying this living hinge piece. Working on a cool shot glass holder for St. Patricks day and I must have snapped 10, WAAAAAAY before any serious bend (like 20 degrees). I am cutting this in walnut ply and I have tried a linear pattern:
And then I tried the cool interlocking spiral one that was posted on the forum recently that someone was showing wrapped around their wrist, and believe me it snapped way, way before that…;
So here is my svg if someone can take a whack or explain what I don’t understand. (note with the spiral pattern I deliberately overflowed the sides otherwise when I tried cutting it down it didn’t successfully go to the edges so figured that wouldn’t work, so this wastes a few mm of surrounding wood.
Teeling Shot Holder spiral hinge.svg.zip (16.4 KB)
That should fold into this (realize the svg doesn’t have the cross brace, but that’s not the issue) and not sure why the render doesn’t have the holes on the top cut out (graphics bug?)