Superleggera - superlight reusable refill spool holder
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A ~60 g refill spool for cardboard cores
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Model information
- Source
- Printables
- Category
- Accessories
- License
- Creative Commons — Attribution — Noncommercial — Share Alike
I designed Superleggera to be as light possible without sacrificing too much stiffness. The complete spool weighs around 60 grams (2 pieces) and is designed for filament refills supplied on 94-95mm cardboard cores (Rosa3D, Prusament refills and possibly others).
Inner rim is designed to provide very tight fit on Rosa3D cores. For a looser fit or slightly smaller cores (94 instead of 95 mm) scale the model down a little bit (0.5 percent should be enough).
Important handling note: always apply force through the centre section, never through the outer rim. Do not push or pull on the rim - it was not designed to withstand such loads.
Printing: I print with PLA, 4 perimeters and 5 top and bottom layers. Infill doesn't matter here so I'm leaving it at the defaults. With those settings a single spool is 32 grams. PLA is entirely suitable for this: its tensile strength is typically measured in tens of megapascals, while the stresses generated by a filament roll (hanging freely on spool holder or in AMS) are only a small fraction of that.
I hope you find it useful! :)
21.10.2026 update: I've added spool for Bambu spools (82-83 mm internal core diameter). Need one for another core diameter? Let me know! :)