Replies to This Discussion

Permalink Reply by Webster Miller on September 14, 2018 at 3:38am

Erlewine uses 'Fish Glue'

https://www.stewmac.com/Materials_and_Supplies/Glues_and_Adhesives/...

https://www.youtube.com/watch?v=Uozzynq9hPg

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Permalink Reply by Hans on September 14, 2018 at 3:52am

Well, Erlewine is always right, I guess...

Thanks!

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Permalink Reply by Over The Edge on September 14, 2018 at 3:55am

I have never yet put carbon in a guitar neck but I have many years of experience with carbon rods in model aircraft. Epoxy is definitely best, in fact the rods are made from carbon strands that are bound with epoxy. A thick super glue would also work, but epoxy is much better. My guess is that titebond would work as well, but i havent tested it. Fast epoxies are not nearly as strong as slower formulas so I would recommend something at least 6 hours, and that is the setup time, NOT the cure time. Also the hardware store variety of epoxy is not generally all that good. If you have a hobby shop nearby go there for epoxy and super glue. Otherwise order it online.

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Permalink Reply by Kirk on September 14, 2018 at 5:00am

Why not just cut a channel, and fill it with epoxy then? ;)

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Permalink Reply by sparky37 on September 14, 2018 at 4:47pm

I would recommend routeing in a truss rod slot with two way truss rod while your at installing carbon fiber rods and gluing in with epoxy. (do not glue in truss rod) Then if the neck does bow with the heavy tension of those bass strings you have a good chance you can adjust it. Please see https://www.stewmac.com/Materials_and_Supplies/Truss_Rods/Adjustabl... I have a four string bass guitar I built with a thick amazon ebony neck and it still bowed, for me all necks I build will have a adjustable truss rods just in case.

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Permalink Reply by BrianQ. on September 14, 2018 at 6:05pm

Usually if it’s a non adjusting neck reinforcement, you’ll want to put 2 equally spaced rods like Danelectro does, one down the middle is fine if there’s not a lot of tension, but if it’s a full size bass, use 2 rods. Any good wood/metal epoxy will do fine. Cheers 

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Permalink Reply by Hans on September 14, 2018 at 6:44pm

That's exactly what I'm planning to do: two equally spaced carbon rods. And it's going to be a short scale bass (30").

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Permalink Reply by BrianQ. on September 14, 2018 at 8:03pm

Good luck, Hans. Let us know how it comes out?

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Permalink Reply by Hans on September 14, 2018 at 9:50pm

I will. Will be a slow process though, because I don't have much time for guitar building these days and I alsmost exclusively work with hand tools...

Thanks for all the good glue advice, guys!

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Permalink Reply by Taffy Evans on September 16, 2018 at 12:23am

Hi, I use carbon fibre quite a bit in necks and reinforcement inside the guitar. Not CBG's.

I would recommend not using rod or tube in a neck,but a carbon fibre bar. When inside a tight fitting slot in the neck a bar has  a far greater resistance to bending. Take bar or series of thinner strips bonded together, with dimensions of say 12mm x 5mm and try to bend it, I find that it will not bend, but a carbon rod would have to be quite a lot bigger to resist the same bending force. 

I think that a rod or tube would resist compression from end to end better than resisting the bending/bowing movement in a neck.

With a bar I use a firm push fit and no glue, then glue on the fingerboard. The good thing about carbon fibre in a CBG neck is lightness.

Taff

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Permalink Reply by Hans on September 16, 2018 at 1:30am

I'm a bit confused with the wording, Taffy, but I think what you call a bar is exactly what I called a rod here... The things I'm going to use are rectangular and 10 x 5 mm.

So you don't glue them at all? Why?

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Permalink Reply by Taffy Evans on September 16, 2018 at 10:34am

Hi Hanns, in the manufacturers parts list that I buy from bar is flat rod is round. In any case your on the right track. Just so others are not confused.

I don't glue because the tightness of the fit of the bar in its slot forces any glue out as the bar is pushed in, and any glue film left is minimal. But you have have a tight fit end to end also. 

If one does not have a tight fit then l would use glue to fill any void in the slot.

Taff

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