# Average human force and torque wrench length

I'm going to buy a torque wrench for some high-torque bolts in my car. I need a torque wrench to torque bolts from 130 nm (95.8 lb-ft) to 160 nm (118 lb-ft). I found some torque wrenches which support a range of 30 - 210 nm. However, I found a problem with all of them and that is the length of wrench. All torque wrenches of this range (even the most expensive ones) are about half a meter long (20 inches). Now, imagine you want to torque a particular bolt in your car to 160 nm (118 lb-ft). Torque = Force x Distance > 160 nm (16.31 kg/m) = Force x 0.50 (meter) > Force = 16.31 / 0.5 = 32.6 kg (about 72 pounds)

Do you think an average human arm can exert such a force (72 pounds) to a torque wrench handle? Why don't they make torque wrenches a bit longer? I don't think adding an extension to the wrench would be a good idea because you may damage it.

• We used to clamp a torque wrench into a bench vice set to 100lb/ft, then the challenge was to “click” it WITHOUT any method of bracing yourself against the bench. So 1 arm to pull and both feet on the floor - no other contact. It was fun taking the piss out of the feeble ones :) Aug 23, 2021 at 5:51
• And they do make longer torque wrenches : like 2m long - used on trucks etc. Aug 23, 2021 at 5:52
• @Solar Mike - How much force you could exert by your arm without any assistance? Can you give me an estimate? Aug 23, 2021 at 6:03
• I gave you exactly that. Did you not read my first comment? What did you not understand? Aug 23, 2021 at 6:20
• @Solar Mike - In your first comment, you only mentioned 100 lb-ft. I don't know the length of your torque wrench to calculate kg or pounds. Aug 23, 2021 at 6:26