Helical Spring Stress Correction Factors 1

[IAHelical]

I have always used the Wahl Stress correction factor. There are at least two others: Sopwith and Bergstraesser. Does anyone have the formulas for these? What are the differences, strengths, weakness, etc?

 

[IAHelical]

Found my own answer perhaps

Sopwith: (c + 0.2)/(c-1)

Bergstraesser: (c + 0.5)/(c-0.75)

Bergstrasser might be a little more accurate at low spring indexes. With spring indexes above 3, all should are similar enough for my needs

 

[vpl]

Glad to hear you were able to find an answer and thanks for checking back in and letting everyone know.

Patricia Lougheed

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