I am planning to 3D print this part from solidworks.

I am hoping to achieve a good level of flexibility with the clasps in this part.

  • Thin circular arc in the Top drawing.


  • Wider circular arc in the Front drawing.

The only flexible materials I have access to currently in the lab I work are nylon and polypropylene. I'm not sure which is a better, so I would like to get some recommendations. The flexibility I am looking to achieve is similar to that of the handle on a pen cap. I want the clasps to be able to flex enough to snap onto a circular tee without breaking, and if necessary be pulled open to take the part off again.

The thickness I am thinking of printing at is 0.1 mm thickness but I also need to be able to have the labels and tick marks be clear enough.

Ultimately I'm only interested in which material is best. Thanks.


  • $\begingroup$ Have you tried adjusting the interference/deflection to get good snap action? You should be able to do this with almost any plastic by adjusting the geometry. $\endgroup$ – Drew Jan 8 at 5:26
  • $\begingroup$ The only geometry I can adjust is the angles, and I'll only have time for a limited number of prints. Because of covid requirements only one person can be in the lab, and only for a few hours. I am planning on doing multiple prints anyway but I'd like to reduce that number going in. $\endgroup$ – WnGatRC456 Jan 8 at 13:03
  • $\begingroup$ I would (highly) recommend printing this in two parts and bonding them together - or at least printing at 45degrees, so you're not relying on layer bonding on the stressed clips $\endgroup$ – Jonathan R Swift Jan 8 at 14:08
  • 1
    $\begingroup$ Well, I use Prusa Slicer with several non-Prusa printers! But good spot 😜 $\endgroup$ – Jonathan R Swift Jan 8 at 17:34
  • 1
    $\begingroup$ How do you intend on printing the R0.5" projection? It is a pretty large overhang. $\endgroup$ – MeEngineerTrustMe Jan 8 at 20:31

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Browse other questions tagged or ask your own question.