Re: Lying Torque Wrenchs

Posted by TxGoat On 2023/11/5 19:36:07

If they get much use or get dropped, they can need to be recalibrated and perhaps cleaned and lubricated. Any precision device that uses springs will probably drift off spec over time, since springs seem to lose tension with time and use.
I always leave my Bonney Tool & Forge clicker type on a very low torque setting to avoid stretching the spring.
A person might make up a simple test rig with a weight and lever. I'd test at about the mid-range of the torque wrench. For instance, a known 40 lb weight at 3 ft would yield 120 ft lbs, 60 ft lbs at 1.5 ft, and so forth. You could test for accuracy and repeatability.