How narrow can the neck be

I am working on my first build.  

It is a 3-stringer with an oak (not quartersawn) neck and a walnut fretboard.  

I like having quite narrow string spacing and wanted to replicate the string spacing I had on a couple of other guitars that I play.  Measuring up at the neck it looks like 25mm would fit the string spacing and give a bit to spare either side of the top and bottom strings.  Then I would taper it out to 35mm at edge of the box.  

Is this too narrow?  Am I removing too much wood from a neck strength point of view? Is it going to feel like I am playing a pencil instead of a guitar?

Please, could you let me know your recommendations? 

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  • Hollowbelly's old red Christian Beshore 3 stringer has a very skinny neck, about 25mm wide at the nut. He's had it years and thrashed it mercilessly on many European tours - I've recently  had it in my workshop to replace the nut and it's still in fine fettle. As long as you keep a decent amount of depth in the neck you can get a very narrow neck to work. I've tapered a few necks from my usual 35mm width and rather like the feel of them.

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    • Thanks John.  Thanks also for organising Boxstock.  My wife and I had a great time at the day event and learnt loads.  Thanks also for the supplies - most of the hardware on the guitar (to be) I got from you.  What thickness do you normally make your necks at nut and heel? 

    • Typically I start with a 22mm neck blank with a 6mm fretboard glued on, and usually they are are a constant depth  from nut to heel.

  • This tenor four string is 1 1/8" at the nut and 1 3/8" at the body.being a four string it does have steel in the neck.306695023?profile=RESIZE_1024x1024

    • Michael, 

      Can I just ask a follow-on question here, please?  Did you also taper the thickness of the neck up to the fretboard as well? If so how thick is the neck at the nut/heel (as opposed to the width which you have given here?)

    • The neck is 5/8"thick at the nut and 7/8" at the heel.The finger board and spacers add about 3/8" to that. 

    • Thanks - that looks like a lovely guitar. I think I am going to go for something in between your two recommendations.  I really appreciate the help.  I think I will put some steel in my next one to give me a bit more flexibility. 

  • 1 1/2 inches is the standard three string neck width and corresponds to a standard lumber board width.  Any narrower and you increase the probability of the string tension bending the neck.   you would need a truss rod to counteract this.   IMHO, a narrower neck would also not be comfortable to play.  It would be like playing a dowel rod or broom handle.  The string spacing on a three string is also easier to play slide on than a six string spacing as it is more forgiving.  I've been beating on guitars and basses for many years and it wasvery easy to transfer to the 1 1/2 inch neck and string spacing.

    • Thanks Chuck.  Finding hardwood seems to be a bit trickier in the UK.  I am making this guitar from a bannister. 

    • P.S.Feuillus also sell replacement laths for garden seats that are about the right size for a neck

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