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Unread 10-01-2017, 10:46
JamesBrown JamesBrown is offline
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Re: Lift Peg (Spring) Source?

Quote:
Originally Posted by sanddrag View Post
I'm not sure you're correct. McMaster defines the "rate constant" whereas century spring defines the "spring rate." Two different things. Is my understanding of this incorrect?
First, refer back to my disclaimer, I don't know much about springs, but here is what I can gather.

First, you are right, spring rate and rate constant are different. However I suspect that what is shown on the E-41 Spring is in fact the rate constant. After comparing quite a few manufacturers, all of them list a value of ~159 for rate, rate constant, or spring rate for these 36inch pieces of what seems to be spring stock. However at shorter lengths they list a Spring rate instead. I believe the E-41 is the equivalent of the McMaster Part, and the 5518 is a 12 inch spring made out of similar stock.

If the term Rate on the E-41 page is not an error then I am not sure I can explain the physics of that spring as all of the physical characteristic match other parts, but the Rate Constant would be off by a factor of 36.

Long story short, you are definitely right, but I think both parts actually work. But someone may want to confirm with Century Spring if they are going to order from there.
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Last edited by JamesBrown : 10-01-2017 at 10:48.
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