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Small Machined springs

  1. Mar 24, 2015 #1
    I usually buy off-the-shelf springs, however I am working on a design that requires some very specific features on each side of the spring (if possible), however this is a very small device, (its a probe).

    Anyways, I was thinking of getting a machined screw, as I've seen some very good looking ones and very complex features on the ends. I was hesitant however, I wanted to know if anyone has had experience with Polycarbonate (stock from McMaster) or even delrin.
    Do you think its possible to machine out PC or delrin into a spring with an OD of aprox, .180" ?

    I mean, I dont doubt the machine's capabilities to do it, Im more curious about its performance as a springing material. . . Has anyone had experience with this?
    What material properties should I be looking for when deciding a spring material? as far as I know PC is very ductile and should not pose a problem, however I am worried about its ability to go past its yield strength (even tho Im using it mostly as a compression spring)

    Any advice is greatly appreciated. Thank you!
  2. jcsd
  3. Mar 24, 2015 #2


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    Try doing a search for plastic springs. They're available off the shelf.
    Alternatively, if you don't need solid plastic, you might consider having steel springs coated with rubber or plastic.
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