The old torque wrench spring debate.

[nissan_crawler]

I asked this due to an argument on another forum, thought I would post it here, also.

Good Morning Jared.

Thank you for contacting us. Regarding your question, testing has shown that the spring inside of micrometer click wrenches can effectively take a "set" over time if left in a position of tension. The calibration of the torque wrench is directly proportional to the steel spring inside of the handle which allows the proper tension on the internal parts.

As with any and all steel, it has an elastic load limit and because of this the spring (if set anything higher than bottom of scale) can take a "set"and cause calibration issues for future use. Hope this has been helpful, please contact me with any further questions.


Best Regards,
Todd Goodrick

National Sales Manager
Precision Instruments, Inc.

 

[Tool Pants]

This sticker is on my Utica click style 250 pound torque wrench.

 

[Flash21]

If a spring style torque wrench is left in a high torque setting for many (say, 15) years, and then it is calibrated and it cals OK, will it provide reliable torque output for the rest of its service lift if it is returned the lowest setting?

 

[48548]

Makes me glad I bought a split beam....