thingiverse
Hollow Shell
My son wanted to create a "turtle bot" so I created this shell in OpenScad. But we realized that in order to be big enough to enclose an Arduino Uno it would take 9 hours to print, so I never printed it.
The included STL is about 56mm wide, but with the OpenScad model or ThingiVerse Customizer you can set it to whatever you want. There is a single variable, shell_radius, which is roughly the length from the center out to the outer shell wall along the smallest axis. (It's 1.5x longer than it is wide)
I've never tried to print it. It will probably need supports in the center.
Revised: Simplified OpenScad file and commented it, because it illustrates a couple techniques for making "pancake" shapes.
Direct link to the original creator's page
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Frequently Asked Questions
How do I download Hollow Shell?
Click the "View on thingiverse" button above to visit the original model page on thingiverse. You can download the STL file directly from the creator's page for free.
What 3D printer can I use for this model?
This STL file is compatible with most FDM 3D printers (Creality Ender 3, Prusa MK3S+, Bambu Lab, etc.) and resin printers (Elegoo, Anycubic). Check the original page for recommended print settings and materials.
Is this 3D model free to download?
Yes, this model is available as a free download on thingiverse. Some creators accept tips or donations.
Can I modify this STL file?
Most STL files can be modified using free software like Blender, TinkerCAD, or Meshmixer. Check the license on the original thingiverse page to see if modifications are permitted by the creator.