Digital Torque adapter and testing TQ wrenches

[Knotgoalie]

I bought a 1/2" digital torque adapter about a year ago and so far I am impressed. I looked into how they work and why, tried one and I use it to test all of my (cheap...Tekton) wrenches with great success.

I picked up a new 3/8" 10~80lb/ft wrench the other day to match the rest of a set (now I have an oddball spare) , looked at the calibration sheet and thought, I could do better. Set for 40lb/ft the wrench tripped @41.2, not bad but with a tiny tweak I was able to get a pretty consistent 40.1. That is mid scale so I would have to do a lot more work for nothing to get any better save for setting the wrench and fine tuning it with the digital every time I want to use it. An interesting and useful tool. If it could do torque angle (some can) it would be perfect.

Got/used one?

 

[JMQ4]

I did exactly the same thing, but actually for a time had two adapters. I checked them against one another across a wide swath of torque values, and they were basically dead on one another. What surprised me was the things were quite accurate at values much lower than the lower limit they specify, like 10nM and less. Also learned that there was more variation in how you actually turned the wrench and the resulting reading than in the set torque value itself.