Three equal parts form a cube. The fit is perfect, assembly can be challenging. I have reverse engineered the "Cubic Trisection", invented by Robert Reid and designed by Oskar van Deventer.
Update: Added a version with a 0.4 mm gap between the assembled parts to make up for printer inaccuracies.
| trisection.stl |
| trisection_bigger_tolerance.STL |
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