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  • Isn't this EXACTLY what torque wrenches are for?

    No.

    The torque wrench is supposed to account for a particular degree of stretch of the fastener, through an assumed amount of friction which is always subject to variation, and which an experienced hand can largely differentiate from the tension.

    The torque wrench can't tell the difference between tension and friction, and the flex built into the wrench somewhat interferes with the effort to sense that if the user bothers to try.

    Come to think of it, sensing the difference is probably mostly based on experience, beyond noticing any roughness in the friction... Or maybe the friction has a more linear quality, I'm not sure. My muscles know the difference; sometimes the intellect adds a fudge factor due to this or that.

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