Not mine, and not a customer's guitar... I noticed someone selling it cheaply and said it needed "some repair".
What could possibly cause this kind of damage? A Gremlin with a hammer destroying the guitar from the inside?
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| Author: | Tai Fu [ Thu Oct 30, 2014 1:45 pm ] |
| Post subject: | What could possibly cause this damage? |
Not mine, and not a customer's guitar... I noticed someone selling it cheaply and said it needed "some repair". What could possibly cause this kind of damage? A Gremlin with a hammer destroying the guitar from the inside? |
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| Author: | Alex Kleon [ Thu Oct 30, 2014 2:12 pm ] |
| Post subject: | Re: What could possibly cause this damage? |
Attachment: image.jpg Always make sure you use fresh glue. Alex |
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| Author: | Colin North [ Thu Oct 30, 2014 2:29 pm ] |
| Post subject: | Re: What could possibly cause this damage? |
Probably a void or separation in the plywood. |
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| Author: | Rod True [ Thu Oct 30, 2014 2:34 pm ] |
| Post subject: | Re: What could possibly cause this damage? |
See how high that saddle is....a lot of extra torque on the bridge. Also when the finish was scored to remove for bridge placement my guess is who ever did the job at the factory cut the fibres of the top through and that caused the damage. |
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| Author: | jfmckenna [ Thu Oct 30, 2014 3:16 pm ] |
| Post subject: | Re: What could possibly cause this damage? |
Rod True wrote: See how high that saddle is....a lot of extra torque on the bridge. Also when the finish was scored to remove for bridge placement my guess is who ever did the job at the factory cut the fibres of the top through and that caused the damage. Yup and if you look at the high rez pic it shows clearly that there is probably 5mm or more finish around the border that is untouched. So there wasn't much holding it on there. |
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| Author: | Tai Fu [ Thu Oct 30, 2014 3:24 pm ] |
| Post subject: | Re: What could possibly cause this damage? |
I see this a lot in cheap guitars, often with the bridge loose. When I reglue them, the removal was easy since there wasn't much holding the bridge down to begin with. It almost looks like the bridge was simply placed onto the wet finish or something, not sure the kind of glue used, it's clear and looks to be the same material as the finish. There are often at least 1/4" of finish under the bridge so the bond is never good. I would score around the finish, remove them, and reglue them and it has not been a problem since. My guess is, the bridge came off, the owner left it strung up and played it for however long it worked, and the top finally gave out as the bridge plate is taking more stress than it could possibly handle. It would take some serious force to damage plywood this badly though... they are normally very strong and the only time I was able to damage them intentionally was hitting it very hard with a hammer. |
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| Author: | dzsmith [ Thu Oct 30, 2014 4:36 pm ] |
| Post subject: | Re: What could possibly cause this damage? |
I also suspect a gremlin. Never feed them past midnight. |
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| Author: | Trevor Gore [ Thu Oct 30, 2014 5:45 pm ] |
| Post subject: | Re: What could possibly cause this damage? |
Tai Fu wrote: ... not sure the kind of glue used... Quite often CA gel. |
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| Author: | Tai Fu [ Thu Oct 30, 2014 10:40 pm ] |
| Post subject: | Re: What could possibly cause this damage? |
No wonder they came off so easily... CA has NO shear strength. |
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| Author: | Trevor Gore [ Fri Oct 31, 2014 8:15 am ] |
| Post subject: | Re: What could possibly cause this damage? |
Yeh, but it doesn't look like a glue failure. In the factories, the finish is usually thick polyester, which is routed off at the bridge location. This one fits that profile as you can see the radius of the cutter at the bridge corners. Quite possible that the routing was too deep (or the finish thinner than the 0.5mm expected). There is no evidence of a bridge plate, as far as I can see, or if it has lifted with the bridge (i.e. no overlap) it was too small. So it looks like a peel failure due to lack of a proper bridge plate, exacerbated by routing too deep into low quality ply. |
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| Author: | ernie [ Fri Oct 31, 2014 9:26 am ] |
| Post subject: | Re: What could possibly cause this damage? |
Alex thanks for posting that picture of the lepages glue it brought back fond memories of elementary school in MTL in the 50/s.It/s funny you posted it, as I was telling someone yesterday , and describing the bottle I used to glue craft projects /paper together in school back in the day cheers ernie |
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| Author: | Alex Kleon [ Fri Oct 31, 2014 9:53 am ] |
| Post subject: | Re: What could possibly cause this damage? |
Your welcomed Ernie. I thought that I would leave it to the more experienced to figure out the damage, but I often think of the Lepages and Elmer's school glue when I reach for a bottle of wood glue. I used the same stuff in the '60's, along with the fat red pencils, and later, when we graduated to ink, the old fountain pens. Little things can sure bring back some great memories! Alex |
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| Author: | ernie [ Fri Oct 31, 2014 10:43 am ] |
| Post subject: | Re: What could possibly cause this damage? |
True that alex , we have elmers, and everything else , but I haven/t seen any lepages since we left BC in 1990, regards ernie |
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| Author: | MikeyV [ Fri Oct 31, 2014 6:30 pm ] |
| Post subject: | Re: What could possibly cause this damage? |
I'd say most of that glue joint held. It ripped a huge hole in the top! You can really see the finish ridge. Definitely not a good way to go. |
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| Author: | KThomas [ Sat Nov 01, 2014 1:21 pm ] |
| Post subject: | Re: What could possibly cause this damage? |
Sure case of bridge bore, often a tropical problem. |
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| Author: | Joe Beaver [ Sat Nov 01, 2014 9:58 pm ] |
| Post subject: | Re: What could possibly cause this damage? |
I'm with the others here, too high a saddle and probably a ply top without much stability. Regarding CA, I could be wrong but I recall Rick Turner saying he has been gluing bridges down with CA for years with no failures. |
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| Author: | Frank Ford [ Sat Nov 01, 2014 10:19 pm ] |
| Post subject: | Re: What could possibly cause this damage? |
It's a standard failure. When the bridge was glued to the plywood top, the finish was scored, and removed to accept the glue. All too commonly, the scoring was heavy-handed and cut right through the upper veneer at the back edge of the bridge. Then the bridge pulls the upper veneer loose, peeling it away from the middle, cross-grain layer. |
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