Nylon strings break easily

Why does the D string on a guitar break so often?

A couple of things might be in question.

Since it is always the same string, there is likely to be a tiny discontinuity on the nut or on the bridge (wherever it breaks) that the string will get stuck on (unless it is a "locking system" it should) the string slide freely). Fix: When changing a string, take a pencil and scribble all over the path of the string (on the nut, bridge, and tuning post. NOT on the fingerboard or above!). The graphite acts like a permanent lubricant.

Optimization problems. It may not seem relevant, but have you ever taken a steel spoon at school or camp and bent it back and forth until you can break your head off? Small abuse of the strings can quickly add up.

  • Always set the grade. So if you tune the D string to a tempered quarter above the A string, set it to a perfect quarter and slide in on the temperament. But to tune the low E to a tempered quarter below the A string, you have to scoop in from D # and stop short of the perfect tense to get the temperament through "subtractive geometry".

  • Always set the same pitch standard. If your friends are using A-440, use A-440. But if you want to play your friend's A-435 piano regularly, you really need a second guitar. The strings will not know where their "home" is.

Just one thing. There could be something in the atmosphere that is interacting poorly with the metal of the string. Trying to use a different metal (bronze, steel, nickel) or alloy (the ratio of metals) might help.