Optimal depth of guitar nut slots

The slots should be only deep enough so 1/3 of the string is above the top of the nut and 2/3 in the nut.

1. How deep should a nut slot be?
2. How do I know if my guitar nut is too low?
3. How do you fix a nut slot that is too deep?

How deep should a nut slot be?

Generally, the bottoms of the nut slots should be a few thousandths of an inch higher than the tops of the frets when the neck is straight. To check nut-slot height, hold the string down at the third fret, and see how much it moves over the first fret.

How do I know if my guitar nut is too low?

A rule of thumb for assessing slot height: Fret a string at the third fret and look for some clearance between the string and the top of the first fret. If it's touching or has a very small clearance, it's a good indicator your slot is too low.

How do you fix a nut slot that is too deep?

Nut Slot Filed Too Deep: How To Fix It

1. Mask The Repair Area. There's no need to take all the strings off, and the nut can stay in place. ...
2. Fill The String Slots. The best filler for a bone nut is the sanding powder from the same or similar nut mixed with CA (Superglue) glue. ...
3. One More Time. ...
4. Sanding. ...
5. Cut the New String Slot.