Thanks, now I'm right back where I started, No Formula <img src="/forums/images/graemlins/lol.gif" alt="" /> <img src="/forums/images/graemlins/lol.gif" alt="" />

Please, I would like a true formula for the torque excerted at the end of an extension to give the corrected torque value. AAARGH!

Let me clarify my confusion.

I need the axial force, rotational torque, parrallel to the bolt. I really don't care how long the wrench is or what type of torque wrench is used. The same force at the end of a 6" inch extension, in a radial, (torque) application is needed regardless of how applied, period.

Torque:
1. The moment of a force; the measure of a force's tendency to produce torsion and rotation about an axis, equal to the vector product of the radius vector from the axis of rotation to the point of application of the force and the force vector.
2. A turning or twisting force.

OK so maybe I don't know how torque is measured, but this is the deffinition, it's not about lever length. Those formula's presented on the web are just general formula's to get you in the ballpark. I want the real formula, maybe it has never be derived.

Lets take yet another example (hypothetical). I built a torque wrench specific for tightening lug nuts. I drilled the center of a torsion bar lengthwise and welded a indicator bar in the center. Now on the t-handle end I have a dial gauge to indicate the torque, with me? Now when I tighten my lug nuts with my t-wrench I can read the applied torque. This has been calibrated with many different weights through the full range so it is perfectly accurate. Weather I use a 1/2" socket or 1" socket the torque reads the same.

Now a couple of the lugnuts are behind a cap and I need a 4" extension to reach them, what is the formula to figure the torque correction. How long my handles on the t-bar doesn't matter, I can choke up on the handle or put a guy on both ends and the wrench reads applied torque. What would matter is to let the wrench float the arc swing.

This can't be that big of a deal. I just want to know the formula for the exension, not the 12 fingered monkey or any such after the fact calculations. EXAMPLE: 12 and 16 inch torque wrenches. 50lb of torque 6" extension = two separate settings for applied torque on the same exact 6" extension, this does not compute!!

The torque calculation would be for torque applied at a 6" arc, using centerlines of axis. So I guess the formula may not be as simple as the 1 lb at 3' = 3 lbs at 1' when it comes to torque. If it is that simple,(ratio) then my summation is correct: ratio of extension to torque value, but this may not be so when combining the effects of torque at the end of a lever (instead of dead weight) and this would be where all the discrepency comes from.

I guess when it comes to Mitsubishi's, we don't need to be so technical. I guess I'll just settle for status quo, a shame isn't it.

PS Scotty, you were doing such a good job fighting the good fight <img src="/forums/images/graemlins/coolg.gif" alt="" /> <img src="/forums/images/graemlins/coolg.gif" alt="" />