Centrifugal Force Puzzle

thingiverse

This is a simple puzzle design I remember from my childhood. The three pieces slide together to form a circular disc. See this video https://www.youtube.com/watch?v=zrF1JjCRyI4. To separate the pieces again, you can insert a pencil or something similar into the center hole and turn the disc counterclockwise: it will fall apart immediately! The model is fully parameterized, see the included OpenSCAD file. For me a horizontal part separation of 0.5 mm worked best; 0.3 mm resulted in very tight fitting parts. I printed this flat on the printbed, with full supports. I set the Z-distance to 0.10 mm in Slic3r to get a nicer (flatter) bottom surface.