minimun depth between Trs rod and back of neck

[Matt]

Im making a neck out of birdseye maple and have glued the thing together

The fretboard (ebony) is really thick (about 6mm), and ive put the truss rod in, but what is the minimum thickness to be safe with between the truss rod and back of neck, so that there is no danger of the neck either snapping or the truss rod preasure cracking the back of the neck?

Matt

[Primal]

I have read that the ABSOLUTE MINIMUM is 1/8".

[Guitarfrenzy]

Yes 1/8" to be safe. So do all your calculations based on this to find out how thin you can make your neck.

[Ludo@Home]

I think it depend on the type of trussrod you intend to use. The pressure/forces are depending on whether it's a single or double rod.

With a double, you'd need 1/8 at least - with a single bent rod, you could maybe go a tiny bit lower ...

[Matt]

thanks guys, because my fretboard is so thick, it means that for the same overall thickness of the neck, the back of the neck piece has to be thinner.

[lmmr]

btw, what should be the typical thickness of a fretboard? 3mm?

[litchfield]

3/16"

And regardless of rod type, less than 1/8" in asckin for trouble.

[Guitarfrenzy]

On a Strat style guitar, we got the average reading of .220" of fretboard thickness. That's why if your not careful, you'll be stuck with a big boat neck if you don't sand down some of the fretboard top. They generally are sold with 1/4" (.250") on the thickest part of their fretboard. So to do your figuring, take the truss slot depth in to consideration, add 1/8" for the wood between slot and back of neck, and the fretboard thickness to get your guideline of how thin you can make it. Now you can see how planning pays off before you even start.