Torque Wrench Calibration Interval Extension with Non-Use?

[dgriffith]

We allow for the one-time interval extension of hand tools (crimpers, strippers, etc.) if they have not been used during the previous cycle. They are shrink-wrapped as evidence of use/non-use.
It turns out that torques wrenches are also shrink-wrapped at the head and extended one time if not used.

I disagree with this because I do not consider a torque wrench to be a hand-tool.
Assuming proper storage, does anyone know if a torque wrench will lose adjustment with time, but non-use?

 

[AndyN]

Re: Torque wrench extension with non-use?

We allow for the one-time interval extension of hand tools (crimpers, strippers, etc.) if they have not been used during the previous cycle. They are shrink-wrapped as evidence of use/non-use.
It turns out that torques wrenches are also shrink-wrapped at the head and extended one time if not used.

I disagree with this because I do not consider a torque wrench to be a hand-tool.
Assuming proper storage, does anyone know if a torque wrench will lose adjustment with time, but non-use?

Since the primary mechanism in a good, "split beam" or "clicker" type torque wrench is a spring, then they can/could lose tension over time. It's going to depend on a number of issues. If they are always "unloaded" before storage, (which is a best practice) then there's no load and likely no setting to change.

It might be worthwhile just doing a study on one to verify what happens, if you have enough of them.