how long will the spring last?

L

Legenda

Joined
Mar 2, 2011
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349
how long will the spring last on a kershaw blur if i just flick it open repetedly for say, 30 minutes a day?
 
Might do a search in BF, for "broken torsion bar" (include the quotes). LOTS & LOTS of discussions on the subject, I think you'll get an idea.
 
Not very long at 30 minutes at a time! You will build heat up in the spring-just like bending a piece of stiff wire back and forth at the same spot.
 
Bill DeShivs said:
Not very long at 30 minutes at a time! You will build heat up in the spring-just like bending a piece of stiff wire back and forth at the same spot.
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That makes sense. I have a few AOs (couple of Kershaw Leeks among them), that I used to fiddle with in the same manner. Usually after a few repeated cycles, the action would slow down significantly; it'd get very mushy and sometimes wouldn't even fully open the blade. I'd put the knife down for a couple or three minutes, then try it again, and it would all-of-sudden seem normal again. Didn't take long to surmise that something in the action was heating up and then cooling off. 'Work hardening' in progress, I assume. Changed my mind about relentlessly opening/closing these knives. It didn't seem quite so fun anymore, once I knew I was likely shortening the life of the spring.
 
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