grabcad
In this project I followed a step-by-step from a 2008 book and in it I was able to practise some Solidworks tools such as using Extrude, Create Helix, Flex Shaft and make a cutting sweep. And I designed the two end nuts. Seemingly simple, but I hope you like it!
Direct link to the original creator's page
Click the "View on grabcad" button above to visit the original model page on grabcad. You can download the STL file directly from the creator's page for free.
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.
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Most STL files can be modified using free software like Blender, TinkerCAD, or Meshmixer. Check the license on the original grabcad page to see if modifications are permitted by the creator.