NC Wayne: It is just a ratio problem. You need to know the length of the original torque wrench. This is usually measured from the center of the square drive to the middle of the handle you pull on.
So Lets say that is 10 inches.
So using your adaptor the length would be 10+1.5= 11.5
You need to know what percentage the old lever/torque wrench is compared to the "new" length of the combined tool.
So divide 10 by 11.5 = 87%
So the original wrench is 87% as long as the combined wrench.
If you wanted a final torque of 350 foot lbs. you would set the wrench at 87% of that or 304.5 foot lbs.
The only caution is only use the extension/crows foot straight out the end. This makes it a straight level problem. If you go to angles it gets to be a very complicated math problem to figure the actual torque.
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Today's Featured Article - Talk of the Town: The Saga of Grandpa's Tractor - by The following saga is from the Tractor Talk Discussion Forum. Someone. The saga starts with the following message: Hey guys I have a decision to make. I know what you all will probably suggest and it will probably agree with me way down inside, but here it is. I have a picture blown up and framed in my "tractor room" of a Farmall M. It was my Grandpa's tractor, of which whom I never got to meet. He froze to death getting this tractor out of the barn to pull a truck out of the ditch before I was born. Anyway my dad and aunt had to sell it at the auction,
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