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| neck angle Cracked http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=47239 |
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| Author: | herry tze [ Tue Feb 09, 2016 2:33 am ] |
| Post subject: | neck angle Cracked |
Hi. Olfers I need help for my neck or headstock cracked. This cracked for second time. First time cracked I use CA glue. And this time I want to try Titebond. But I want to know why that headstock not enought to hold the strings? This EUB guitar I uses weedwacker string. And I need your suggestion for this problem. Thank's so much |
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| Author: | Colin North [ Tue Feb 09, 2016 4:53 am ] |
| Post subject: | Re: neck angle Cracked |
At a glance, it looks like a large stress riser across a very short cross section of end grain with little support. Basically a sort of short half lap/butt joint? There's no strength in the end grain south of the peg box, and only a short lap in the upper part of the neck. It's such a short length, especially the peg box side of the joint, I'm not even sure that Ebony or CF bars and epoxy would offer enough reinforcement, although certainly more than the original joint. |
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| Author: | Michael Lloyd [ Tue Feb 09, 2016 1:18 pm ] |
| Post subject: | Re: neck angle Cracked |
Short of making a new neck. I would try a couple of dowels. |
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| Author: | Mike OMelia [ Tue Feb 09, 2016 3:21 pm ] |
| Post subject: | Re: neck angle Cracked |
I cannot seem to understand what I am looking at. But, CA was by far the wrong choice. Regular Tite Bond and some clamps. Dowels if you have the ability. |
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| Author: | doncaparker [ Tue Feb 09, 2016 5:49 pm ] |
| Post subject: | Re: neck angle Cracked |
The big red thing to the right is a scroll bass headstock. The thing on the left is the back of the neck, with the truss rod nut sticking out the top. It took me a while for the perspective to make sense, too. Yeah, dowels, I guess. Watch out for the truss rod slot and the rod itself. |
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| Author: | Mike OMelia [ Tue Feb 09, 2016 6:26 pm ] |
| Post subject: | Re: neck angle Cracked |
Ya'll think Tite Bond will work over wood saturated with CA? And what is that fiber looking stuff? Double sided tape? Fiberglass? |
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| Author: | herry tze [ Wed Feb 10, 2016 4:07 am ] |
| Post subject: | Re: neck angle Cracked |
thank you so much, I will try with titebond and add the dowell too. GBU |
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| Author: | herry tze [ Wed Feb 10, 2016 4:10 am ] |
| Post subject: | Re: neck angle Cracked |
Colin North wrote: At a glance, it looks like a large stress riser across a very short cross section of end grain with little support. Basically a sort of short half lap/butt joint? There's no strength in the end grain south of the peg box, and only a short lap in the upper part of the neck. It's such a short length, especially the peg box side of the joint, I'm not even sure that Ebony or CF bars and epoxy would offer enough reinforcement, although certainly more than the original joint. Hi, Colin I just built from the plan. thank's. |
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| Author: | Colin North [ Wed Feb 10, 2016 5:29 am ] |
| Post subject: | Re: neck angle Cracked |
Yes Harry, it wasn't a dig at you at all. I remember seeing your earlier posts, you built from the The Libellula plans on Mottola's site. Doesn't mean its not a high stress type of joint. The lap section which broke twice is only about 3/4" long on the plans, and the pegbox section 1/2". Not a whole lot of wood for the stress on and /weight of the pegbox. |
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| Author: | kencierp [ Wed Feb 10, 2016 9:00 am ] |
| Post subject: | Re: neck angle Cracked |
Unless you can remove the glue "residue 100%" (I think impossible in the case of CA) PVA glue will not work properly, it has to saturate the open wood pores. I would suggest the dowels and a high strength Epoxy. |
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