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

[cdf0080]

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?

 

[Mech_Engineer]

Anything's possible, but what companies will have available is kind of difficult to answer...

You might look here: http://www.centuryspring.com/

 

[huntoon]

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.

 

[OldEngr63]

You could also wind one yourself if worst came to worst.