For the Mathematicians:
I have a torque wrench that will only measure as high as 150 ft-lb. I need to torque a couple bolts to 300 ft-lb. I don't want to buy another torque wrench that will measure that high because I don't ...
Forum Discussion
valhalla360 wrote:
If you have a 1' torque wrench that peaks at 150#, it takes 150# of force to max out the wrench.
Just slipping a pipe over the end so you get a 2' arm, only means it takes 75# of force to max it out at 150#. You could apply 150# of force to get 300# of torque but with just an extension arm, you have no way of knowing how much force you applied.
As others have said, there are multipliers that go between the wrench and the nut that can allow you to measure the torque up to higher values.
You were incorrect when you said you just needed the math. You need the right tool.
Correct answer. Here are some torque wrench FAQs.
The most cost-effective solution would be the Harbor Freight 3/4" drive Torque Wrench that will measure to 300 ft-lbs.
Or, torque if to 150 per your existing wrench and fell how much effort was required. Then get a long pipe on a standard ratchet and apply the same force, if the handle is twice as long as the torque wrench it should apply double the torque with the same effort. This would only be a guesstimate and not exact.
What sort of bolts are these?
