thingiverse
I had need for a split collar, and I ran out of them in metal, so I figured I'd try a 3d printed one. Just print the 2 halves, then tap out the bottom half for 1/4-20 threads. It works great and holds tension on a 3/4" shaft perfectly. I printed out of PETG with 100% infill for rigidity, and just smoothed out the inside diameter with a sanding attachment on a dremel.
Direct link to the original creator's page
thingiverse
thingiverse
thingiverse
thingiverse
thingiverse
thingiverse
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.
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 thingiverse page to see if modifications are permitted by the creator.