Unloading a torque wrench - spring weakening.

[johnSchwaner]

It has been the common recommendation to return a snap style torque wrench to its lowest setting after usage. The often given reason is that the spring, if left compressed, will weaken.

I have always questioned the reason (not the practice). Will the spring weaken (creep) under sustained loading?

ps Hope this is a valid spring question!

 

[MikeHalloran]

Creep is real.
Some springs more than others, but they all do it.



Mike Halloran
Pembroke Pines, FL, USA

 

[israelkk]

I believe The exact term is relaxation. Creep is under constant load while relaxation is under constant deflection.

 

[johnSchwaner]

Thank you for your responses. I was able to do a google search on spring relaxation to further my knowledge.