Cycloidal Gear Box (100 turns needed to open)
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A box that takes 100 turns to open thanks to an unusual "thread" consisting of a cycloidal gear
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Informacje o modelu
- Źródło
- Printables
- Kategoria
- Winter & Christmas & New Year's
- Licencja
- Creative Commons — Attribution — Noncommercial — Share Alike
This box uses an unusual thread consisting of a cycloidal gear and dimples in a very shallow spiral to make it take 100 turns of the handle to take the lid of. It's designed this way purely to take a long time to open and be frustrating/annoying. As this is meant as a box for a Christmas present, Christmas ornaments are slightly embossed into the outer surface and it can furthermore be printed with filament changes to make it look a bit less bland.
The inside of the box has room for a 79.5mm diameter and 125mm tall cylinder. It thus perfectly fits the Wacaco minipresso NS2 portable capsule espresso machine.
There is also a half scale version and a half scale version that has a shorter box (internal space 39.75mm diameter and 50mm tall) with the Christmas ornaments removed.
This model has 0.15mm tolerances and the lid is a print in place part so printers need to be quite well calibrated. Scaling is thus also not unproblematic and while both sizes can easily be uniformly scaled up (parts will get more loose tho which might effect how well the thread works) but likely not scaled down further than to a 66% size (resulting in 0.1mm tolerances).
Inspired by the Clockspring Transposition Tank