who has built a tool for determining torque?

[sberry]

Up to 40% of rotational torque is consumed on a NC bolt due to friction losses. John Deere tech manuals have one called fastener guide most everyone armed with a screwdriver should read.
Whats a better test of all this is a bulldozer. Stuff on cars is minor compared to this and I have seen hundreds of connections come apart due to dry dirty threads usually tightened by hand, not always but never got tight enough to clamp. Put it back with clean bolt and a little light oil and its not a problem.
We had a question from local concrete co, wheels on trucks coming loose,,, turns out (led by some amateur machinist type) they were scared to oil studs because "they might come loose" Now,,, the obvious was they WERE loose but they cant get past that "they might". This proves the fault with the educational system to some extent about applying basic logic to most problem solving.

 

[sberry]

We had a truck come in from a local outfit where the wheel had been changed by local tire place. The operator says, the nuts come loose. Not so, the dipstick had zipped them on fast and dry and they seized and quit rotating but never clamped.

 

[sberry]

Adam,,, we bought an old truck and it was used in the salt, a Renault Mack mfg in France. We thought oh **** but when we put a wrench to them they came apart like they should even though the bolt ends and nuts were rusted to nubs. You could see where they must have been very QC minded and the internal threads were still near pristine. They must have had the perfect coating at the factory assembly.
We spray some common nuts, had some under water 10 yrs, same deal, all rusted outside but come right apart. Unsprayed all seized and have to be cut off.