I have recently discovered flexure springs (see image below), and I am interested in using one in an amateur project I am building.

However, I would prefer if I am able to adjust the "stiffness" of the flexure spring, to allow the spring to bear different loads.

Despite extensive searching online, I have not found a flexure spring design that provides flexible or adaptable stiffness.

Is it possible to have a flexure spring, the stiffness of which, can be adjusted?

enter image description here

  • $\begingroup$ Do you mean torsional spring? $\endgroup$
    – ShadowMan
    Commented Jul 29, 2019 at 2:11
  • $\begingroup$ @ShadowMan No, torsional springs are quite different from flexure springs (see image attached in my question). $\endgroup$ Commented Jul 29, 2019 at 18:13
  • $\begingroup$ I saw your picture. So then do you load that spring in a direction perpendicular to it's plane? $\endgroup$
    – ShadowMan
    Commented Jul 29, 2019 at 18:21
  • $\begingroup$ Yes, that's correct $\endgroup$ Commented Jul 29, 2019 at 18:44
  • 1
    $\begingroup$ You could look into adding additional of these units either in series or parallel and device some way of making them easy to take out. $\endgroup$
    – John
    Commented Feb 5, 2021 at 19:43

1 Answer 1


In your case the adjustable stiffens can be archived by modifying the shape from the spring. If you use different stiffens and allow some blocking this can be achieved. See screenshot. enter image description here


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