I've seen this referred to here on the forums....but I don't know what it means. Can someone please explain to me what a "zero fret" is? I had thought it was the same thing as the nut, but now I'm not sure....
You are mistaken. It is a design feature implemented for a purpose. In some instruments it is a positive selling point. Some splendid instruments feature zero frets.If an instrument (guitar or uke) is made well, there is no need for a zero fret. It seems to be a manufacturing shortcut to avoid having to properly and accurately make and install a good nut.
If an instrument (guitar or uke) is made well, there is no need for a zero fret. It seems to be a manufacturing shortcut to avoid having to properly and accurately make and install a good nut.
Likewise, the "zero fret" or "fret nut" is often associated with inexpensive instruments. It's not necessarily a cheaper way to make a guitar, and it is the way Selmer did it, so it's the way virtually all replicas are made, too. Detractors of the zero fret often cite the fact that it is a way to escape setting the height of the nut by avoiding the hand filing of each groove. In skilled hands, action setting at the nut takes only a few moments, so there really isn't all that much of a labor savings. Here's a thought: There's a lot of downward string pressure at the nut on any steel strung guitar with a slotted peghead. So, the metal bearing surface at the zero fret allows the string to slide over the nut more smoothly so the string doesn't "jump" or "ping" as it's tuned up. The bone nut only acts as a guide for spacing the strings and doesn't bear much load, so the string has far less tendency to settle into the bone and deform the bottom of the slots as it would in a traditional Martin design.
As with so many other things, there's a down side, too. String windings are more likely to be damaged by the harder material of the zero fret than by a traditional bone nut.
And no reason why they should if the builder didn't see the need. Just as there is no reason why they shouldn't if the luthier decides that they should. Diff'rent strokes for diff'rent folks.Interesting. I own, or have owned, dozens of very high end stringed instruments, and none have ever had a zero fret, even my Michael Dunn, which is a world class modern instrument made to copy Django Reinhardt's Selmer Maccaferri.