Fretboard Glue-up

Please put your pickup/wiring discussions in the Electronics section; and put discussions about repair issues, including "disappearing" errors in new instruments, in the Repairs section.
Post Reply
User avatar
Peter Wilcox
Posts: 1133
Joined: Sun Jan 08, 2012 1:31 am
Location: Northeastern California

Re: Fretboard Glue-up

Post by Peter Wilcox »

When you say you are "jigging up the neck" into a slight forward bow, are you bending the neck/putting it under tension, then gluing on the fret board? If so, the residual tension in the neck (toward back bow) might be causing the glue to creep, ending up in a back bow.
Maybe I can't fix it, but I can fix it so no one can fix it

User avatar
Barry Daniels
Posts: 2542
Joined: Thu Jan 05, 2012 10:58 am
Location: The Woodlands, Texas

Re: Fretboard Glue-up

Post by Barry Daniels »

The idea that using epoxy is like adding a plastic sheet is erroneous. It will fix the problem you are having. Just have to reset your brain to remove the epoxy bias.
MIMF Staff

David King
Posts: 2672
Joined: Sat Jan 07, 2012 10:01 pm
Location: Portland, OR
Contact:

Re: Fretboard Glue-up

Post by David King »

I use polyurethane glue. Clamps come off in an hour, same clamping pressure as Titebond, no creep, no moisture introduced. Fingerboards pop off at the joint when absolutely necessary. Most epoxy is reversible with application of sustained heat of 160º-180º F.

You might consider redesigning your fingerboard radiusing system to accommodate the fingerboard and neck as a unit. Trim fret barbs if you go to a harder wood or cut kerfs a couple of .001" wider.
I'd look at denser woods that are more RH stable for your fingerboards. Osage comes to mind.

Mark Wybierala
Posts: 469
Joined: Fri Feb 03, 2012 10:14 am
Location: Central New Jersey

Re: Fretboard Glue-up

Post by Mark Wybierala »

I think you jig idea had merit -- I get it -- but not a good idea. I don't fully understand the Titebond/backbow problem but I've encountered it myself and have a client under my wing who encounters it all the time. He brings me necks so I can refine his fretwork and without fail, there is always a slight amount of backbow. Even with a dual action trussrod, I don't like it as it puts the neck into a condition of uncertainty -- somehow seems less heathy than a neck in balance between string tension and trussrod control -- corrupts the mojo

David King
Posts: 2672
Joined: Sat Jan 07, 2012 10:01 pm
Location: Portland, OR
Contact:

Re: Fretboard Glue-up

Post by David King »

I clamp my fingerboards on with relief but they always spring back almost straight when I take the clamps off. I add more relief when i sand the radius. By the time the frets are in they are almost straight again.

User avatar
Dan Smith
Posts: 332
Joined: Mon May 18, 2015 9:33 pm
Location: Texas

Re: Fretboard Glue-up

Post by Dan Smith »

Happens to me all the time.
Can’t understand why.
I use a flat clamping caul and glue the board to the neck when both pieces are still flat before radius and carving.
I reckon glue could be the problem, such as expansion and shrinkage that happens when gluing veneer with Titebond. (i now use veneer glue).
Thanks for the insight.
Ever-body was kung fu fight-in,
Them kids was fast as light-nin.

User avatar
Barry Daniels
Posts: 2542
Joined: Thu Jan 05, 2012 10:58 am
Location: The Woodlands, Texas

Re: Fretboard Glue-up

Post by Barry Daniels »

Titebond contains water. Water expands wood. Pretty simple. Some glues (like epoxy) do not contain water and so the wood remains stable.
MIMF Staff

User avatar
Peter Wilcox
Posts: 1133
Joined: Sun Jan 08, 2012 1:31 am
Location: Northeastern California

Re: Fretboard Glue-up

Post by Peter Wilcox »

WTF happened to the OP? It weren't me. :o
Maybe I can't fix it, but I can fix it so no one can fix it

User avatar
Barry Daniels
Posts: 2542
Joined: Thu Jan 05, 2012 10:58 am
Location: The Woodlands, Texas

Re: Fretboard Glue-up

Post by Barry Daniels »

We must have scared him off? And he took his posts with him? Strange.
MIMF Staff

Post Reply