Olivetti Underwood 21 (Typewriter) Spool Nut
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Olivetti Underwood 21 replacement spool nut. Created in FreeCAD.
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Informacje o modelu
- Źródło
- Printables
- Kategoria
- Mechanical Parts
- Licencja
- GNU General Public License v3.0
I created this for my own typewriter and 3D printer, so results may vary depending on your typewriter and 3D printer. As well, this spool nut model uses the thread pattern M3.5, but I'm not sure if that is the actual specification (didn't want to go on a hunt online for schematics (nor do I possess anything to check the thread pattern), so I went with guess-and-check).
For context, I recently purchased an Olivetti Underwood 21, which—aside from cleaning the mechanical components—only needed spool nuts. Without those nuts, the ribbon spool fails to rotate, wearing the ribbon unevenly. I printed these using PETG on an Ender-3 Neo using default PETG settings from PrusaSlicer.