Summary

I figured out how to make these tri-sectioned cubes. They make a great little brain teaser. This cube has a .4mm tolerance at full size.

If you want to know how I made this you can find a quick ~10min video how-to here https://youtu.be/x8g29XM_Ksw

Print 3 of that cubeThird.stl or use the file that has them all together, tricube.stl

Print Settings

Printer:

Cetus

                                            <p class="detail-setting rafts"><strong>Rafts: </strong>                     <div><p>No</p></div></p>                                                                                <p class="detail-setting supports"><strong>Supports: </strong>                     <div><p>Yes</p></div></p>                                                                                <p class="detail-setting resolution"><strong>Resolution: </strong>                     <div><p>.2mm layer .4mm nozzle</p></div></p>                                                                                <p class="detail-setting infill"><strong>Infill: </strong>                     <div><p>20</p></div></p>                                                        <br>                        <p class="detail-setting notes"><strong>Notes: </strong>                    </p><div><p>Depending on how well your printer handles you may be able to not use supports. All it should need is a light sanding where the supports were. I printed this at 50% size and it fit together very tight at first but after using it a few times it is now perfect and snug.</p></div>

Fusion 360 Trisection Cube