Re: WHAT A BOLT IS, AND HOW IT WORKS

"TeGGeR®" <tegger@xxxxxxxxxx> wrote
> Each wheel has, of course, 4 nuts. Each lug nut was tightened by me to 75
> ft lbs back in the summer. Well, I just measured the torque necessary to
> break them loose just now, in two pound increments on the click-wrench.
>
> Guess what? Each one required about 90 lbs to crack free.

For the archives, I think it's important to note that the torque wrenches
accessible to the ordinary consumer are not supposed to be used to measure
loosening torque.

I'm not saying your measurements are necessarily wrong. They sound
reasonable and not inconsistent with the reality that loosening torque tends
to be a little higher (according to boltscience, among others) than
tightening torque, due to the differences in dynamic friction (while
tightening) vs. static friction (while loosening).

I am saying from my reading, this is inappropriate use of a tool, leading I
suspect either to incorrect measurements, abnormal wear and tear on the
torque wrench, or both.


.

Relevant Pages

  • Re: Tying and soldering explained 1898
    ... "Tying and Soldering" ... The hub of the wheel being tested was securely ... This was also the variance of the measurements that were averaged. ... the true test is torque + lateral loading, just like you'd get on a hill when honking.... ...
    (rec.bicycles.tech)
  • Re: CVT Question
    ... smaller engine and maintain the same power? ... automatic transmission and 3.5 liter V6 engine, ... "torque power", as torque is force (measured in pounds if SAE or ... measurements of energy. ...
    (rec.autos.tech)
  • Re: Tying and soldering explained 1898
    ... attachment to the batter, and the point of contact with the ball, is ... /always/ subject to torque. ... on it (gravity plus air resistance), ... measurements, but experimenters rarely do that if a ...
    (rec.bicycles.tech)
  • Re: newbie question 13b in a boat
    ... >>Horsepower is the result or torque and motion..... ... it just measured how much the engine actually ... That is probably one of the better ways to do in-situ torque measurements. ...
    (rec.autos.rotary)
  • Re: WHAT A BOLT IS, AND HOW IT WORKS
    ... I just measured the torque ... Each one required about 90 lbs to crack free. ... There is no harm done to a torque wrench used in such a manner. ... the tire guy used a torque wrench to tighten the lug nuts. ...
    (rec.autos.makers.honda)