Originally Posted by Notes Norton
I don't know the limits of temperature change on the truss rod. Since it is also metal, I suppose it goes through the expanding and contracting situation with temperature.

Perhaps someone with more technical guitar knowledge can comment.


Insights and incites by Notes ♫


For a 25 degree F change in temperature, the strings and truss rod will change their relaxed length by less than a thousandth of an inch. Since the string length is fixed by the tuner and bridge saddle, this change in length translates into a change in tension.

In the case of the truss rod, this is not enough to affect relief. Consider that the truss rod nut will typically require at least a small but significant portion of a turn to affect the relief. This changes the truss rod length by several thousandths of an inch.

The tension of a string is very sensitive to temperature. And pitch is very sensitive to string tension. Think of how little a string stretches when you press it down to the 12th fret. This is well under a thousandth of an inch. And yet, the saddle needs to be moved back to compensate for the increase in pitch that this causes.

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