Re: Torque Guides

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Posted by Jock (OR) on March 17, 2021 at 21:10:59 [URL] [DELETE] :

In Reply to: Torque Guides posted by Kimberly on March 15, 2021 at 19:20:53:

To add to the confusion, torque values change depending on the friction applied to the fastener. The friction is in two places, under the head/nut where it contacts the part, and the engagement surfaces of the threads. I am not including such variables as misalignment and side loads on the fastener, which are pretty hard to calculate.

Dry threads take more torque than oiled threads. A "slick" lubricant can make it easy to over-torque and stretch the fastener too much. I do not recall any advice on the effect of thread locker on torque values, but it must be acting as a lubricant.

I sometimes see mention of correction for "oiled threads" in torque charts. Often, there is no mention of such variables.


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