Spring constant and force of conical springs

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keyword: springdesign; springconstant; force; conicalsprings

Question Nameirul 2021/4/22(Thu) 10:59

Hi, I have question that need to calculate the force generate by conical spring. i do not have value of the spring constant. but I have those information coil diameter =0.30mm, diameter 1 = 4.14mm, diameter 2 = 2.18mm, total free length = 5.58mm, solid length = 1.52mm. how to determine the value of spring constant and then find the force?

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Answer Tokai Spring 2021/4/22(Thu) 11:40

Thank you for writing to us!
Please find attached our answer to your question. We hope it helps.
Regarding the spring constant of conical springs, we are afraid that it is not available because the spring constant changes after the spring reaches its solid height.
If you have any other questions, please let us know anytime!

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Answer Amirrul 2021/4/22(Thu) 18:37

what is meaning of alpha? and how to determine alpha?

Answer Tokai Spring 2021/4/22(Thu) 18:40

Dear Mr./Ms. Amirrul,

Our apologies for not clarifying this.
α is the pitch’s angle as you can see from the illustration below.

Best regards,

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