Some time ago, after experiencing problems with steel studs pulling out of aluminum castings, I decided to see what could be done about calibrating my torque wrenches. Long story short, I'm now equipped with certified digital torque analyzers, and can do the calibrating myself.
One of my torque wrenches, which has always only been absolutely babied, was out 18%!
Out of curiosity, I purchased three more, tested them, CALIBRATED them, then returned them. They were 8%, 11% and 9% out of whack, BRAND NEW!
I tried another test on one of them, before returning it. I put the head of the torque wrench on the bench, and let the handle fall to the bench from 6". The calibration was thrown out 2%! A careless "I'll just put this here" drop onto the bench, like I've seen many people do, threw the re-recalibrated wrench out 5%.
I've been told to handle these things like glass, and now I know why.
In aviation, it's the law to recalibrate everything (from wrenches to gauges) once per year. Judging by these tests and the carelessness of some people, I'd think every month would be more safe!
In any case, I'd like to offer a torque wrench calibrating service. I can calibrate from 10 in.lb to 250 ft.lb.
Prices:
Test wrench $30 Cdn.
Calibrate add $20 Cdn.
For each additional wrench in the order, subract 5% each.
Your choice of return shipping/insurance is not included in these prices.
This is half the cost of having a torque wrench tested and calibrated at any other certified calibration station.
It's well worth it, if you're concerned with continuing to perform high quality work.
Incidentally, being a dieselite like anyone else on here, barter (parts traded for labour) is considered fair trade!
:wink: