Can an Extension Spring Reach 32 Inches While Unloaded and Support 30-40 lbs?

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    Extension Spring
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Discussion Overview

The discussion revolves around the feasibility of using an extension spring that is 20 inches long when unloaded, can extend to 32 inches, and can support a load of 30-40 lbs. The focus includes potential sources for such springs and alternative solutions.

Discussion Character

  • Exploratory, Technical explanation, Debate/contested

Main Points Raised

  • One participant questions the possibility of an extension spring meeting specific dimensions and load requirements, seeking information on where to purchase such a spring.
  • Another participant suggests that while anything is possible, the availability of such springs from companies is uncertain and provides a link to a potential supplier.
  • A different participant proposes a hack involving modifying a garage door spring to meet the desired specifications by cutting it and using a jig to limit extension.
  • Another suggestion is to wind a spring oneself as an alternative solution if necessary.

Areas of Agreement / Disagreement

Participants express various ideas and suggestions, but there is no consensus on the feasibility of the original spring specifications or the best approach to achieve the desired outcome.

Contextual Notes

The discussion does not clarify the specific mechanical properties required for the spring or the implications of modifying existing springs, leaving some assumptions unaddressed.

cdf0080
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Is it possible for an extension spring to be 20 inches long while unloaded, 32 or so inches long fully extended(12" max displacement), and have an initial load of 30-40 lbs? All other properties are virtually not important. If so, where could I buy them?
 
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Anything's possible, but what companies will have available is kind of difficult to answer...

You might look here: http://www.centuryspring.com/
 
Could a hack work?

you could get a garage door spring, cut it to 20", then make a cable and washer jig to limit the extension.
 
You could also wind one yourself if worst came to worst.
 

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