L.Adamson
Well Known Member
*sigh*
If I have a 12" torque wrench and I apply a 80 lb force at the grip there will be a 80 ft-lb torque at the head. If I add a 3" extension (0.25 ft) straight out from the head that 80 lb will still produce 80 ft-lb at the head but it will produce 100 ft-lb at the end of the extension. That's what everyone wants. Problem is, if I use an 18" wrench, I will apply a 53.3 lb force at the handle to get 80 ft-lb at the wrench head. The torque at the bolt will be 53.3lb*(1.5+0.25 ft), or 93.3 ft-lb.
Might be within tolerances, might not. It's better to know than to guess.
You're still incorrect. The difference is where the 3" extention is applied. If it's between the nut & wrench head, then the .80 applies. It doesn't matter how long the handle of the wrench is, even with cheater bars, if the 3" between the nut and wrench head stays at 3".
As I previously said, that nut is still going to turn the same distance
to satisfy it's torque setting, wheather you apply 80 lbs or 53.3 pounds at the end of the handle, depending on length. Additional length of handle, only changes the required amount of force, that you apply to turn that nut the same amount of degrees.............as long as the original 3" remains the same.