How to Select a Compression Spring - Spring Rate, Design ...

23 Sep.,2024

 

How to Select a Compression Spring - Spring Rate, Design ...

Begin by finding the outside diameter (O.D.) and length or rate (strength) you require. You can reference the diagram shown on the right.

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Spring rate is the load (pounds) it takes to deflect (compress) the spring one theoretical inch, i.e., if the rate = 40 lbs./1 in., it would take 10 pounds to deflect it 1/4 inch, or 80 pounds for 2 inches, etc.

&#; If the length or rate is not known, but the installed working length (WL) is, then select a spring &#; say 30% longer &#; than the WL. You must know the load at the WL. Just subtract the WL from the spring&#;s selected free length and multiply by its rate to obtain the load to compare with your required value.

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&#; If the load required is not obtained, select a new candidate with either an increase or decrease in rate (strength) or free length.

&#; Be certain that the tabulated solid length (completely compressed) for your candidate spring indicates enough room for deflection and also that the deflection is not significantly greater than the tabulated &#;Maximum Suggested&#; for stress reasons.

Note: If the spring needed for your application cannot be found in our inventory, we can fabricate it for you. Simply request a quote.

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