Like waddy said, watch the mass of the bridge. Btw, I like your tag line
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| Gluing a Cocobolo Bridge http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=44481 |
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| Author: | Greg Maxwell [ Mon Nov 03, 2014 8:39 am ] |
| Post subject: | Gluing a Cocobolo Bridge |
Anyone have experience with gluing a Cocobolo bridge? I've glued Cocobolo bindings, head plates, and fretboards using epoxy or super glue, cleaning first with acetone, with no issues. I've got a bridge glue coming up and of course I don't want to use these glues on a bridge. Will HHG work well provided the bridge is scuffed and cleaned? |
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| Author: | TonyKarol [ Mon Nov 03, 2014 9:02 am ] |
| Post subject: | Re: Gluing a Cocobolo Bridge |
I have done a couple .. fresh razor blade scrape, no acetone wipe ( I never do that), fish glue. I imagine HHG would be fine too. |
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| Author: | ernie [ Mon Nov 03, 2014 9:16 am ] |
| Post subject: | Re: Gluing a Cocobolo Bridge |
Greg, I/m 3mi from raytown rd/main st grandview. I/ve used epoxy on coco backs .but like tony above mainly use either fish or 315 g HHG. I also typically use a lower density bridge my faves walnut, hawthorne, persimmon, honey locust, etc. I use 80 grit or 120 on the bottoms of my bridges to create small grooves |
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| Author: | Arnt Rian [ Mon Nov 03, 2014 9:17 am ] |
| Post subject: | Re: Gluing a Cocobolo Bridge |
I don't think I have ever used a cocobolo bridge, but I've glued plenty of backs and sides and appointments, mostly with hide glue. The trick seems to be freshly prepared surfaces and a good fit. Lots of people report that cleaning coco with acetone or the like will draw oils to the surface and actually cause more problem than it solves, so I've never experimented with it. For a bridge, I would do the same thing. Oh, and I never scuff the gluing surface, and my bridges stay put, they are mostly smallish African blackwood or BRW bridges, on steel string guitars with medium strings. The consensus on the forums, from what I have seen, is that scuffing is counterproductive, but again, I have not really experimented much with it. |
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| Author: | RusRob [ Mon Nov 03, 2014 9:19 am ] |
| Post subject: | Re: Gluing a Cocobolo Bridge |
You can treat it pretty much the same as Rosewood... It actually is in the Rosewood family. I have replaced a few Brazilian Rosewood bridges with Cocobolo so I could match what they had. I use HHG and just before gluing I scrape it down. Some guys prefer to use Acetone but I have never had any problems with just scraping. Bob |
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| Author: | jfmckenna [ Mon Nov 03, 2014 10:19 am ] |
| Post subject: | Re: Gluing a Cocobolo Bridge |
I have several, at least 5 I can think of, guitars out there with Coco fretboards and bridges and have simply glued them up with a fresh scraped or planed surface using either LMI White (old stuff) or Titebond and have no separation issues that I know of yet, going on at least a decade. |
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| Author: | JasonM [ Mon Nov 03, 2014 10:28 am ] |
| Post subject: | Re: Gluing a Cocobolo Bridge |
I use 80 grit scuff of bridge and spruce, and west systems epoxy, wet out both surfaces, then thickened in the joint. |
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| Author: | Greg Maxwell [ Mon Nov 03, 2014 10:32 am ] |
| Post subject: | Re: Gluing a Cocobolo Bridge |
ernie wrote: Greg, I/m 3mi from raytown rd/main st grandview. We are quite close, I am about 3-4 minutes from the Main St. exit off 71 highway, Grandview. We should get together. |
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| Author: | Greg Maxwell [ Mon Nov 03, 2014 10:34 am ] |
| Post subject: | Re: Gluing a Cocobolo Bridge |
Thanks for the tips guys. I have always heard that cleaning with acetone is a must, interesting to hear that many don't. I have always lightly scuffed my bridge bottoms. |
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| Author: | WaddyThomson [ Mon Nov 03, 2014 11:17 am ] |
| Post subject: | Re: Gluing a Cocobolo Bridge |
I agree that Cocobolo bridges need only the same treatment as other Rosewoods. Scrape and glue within about 15 or 20 minutes. HHG is fine. I have done several with Cocobolo, before I learned better. Too heavy for classical guitars. |
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| Author: | uvh sam [ Mon Nov 03, 2014 12:07 pm ] |
| Post subject: | Re: Gluing a Cocobolo Bridge |
Like waddy said, watch the mass of the bridge. Btw, I like your tag line
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| Author: | meddlingfool [ Mon Nov 03, 2014 1:08 pm ] |
| Post subject: | Re: Gluing a Cocobolo Bridge |
Yup, same as the others. Proceed as normal, just prepare the joint fresh by whatever method. |
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| Author: | Greg Maxwell [ Tue Nov 04, 2014 12:47 pm ] |
| Post subject: | Re: Gluing a Cocobolo Bridge |
uvh sam wrote: Like waddy said, watch the mass of the bridge. Btw, I like your tag line Yeah, I always weigh my bridges. I was hesitant to use Coco for that reason but I made one and it came in right where I wanted it. I learned that from a great builder. I've heard that tag line from him a few times also. 
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| Author: | Greg Maxwell [ Mon Nov 24, 2014 8:56 pm ] |
| Post subject: | Re: Gluing a Cocobolo Bridge |
I wanted to report that the Cocobolo bridge glue went well. I am of the "contour, scuff, and clean with Acetone" school of thought and this is how I approached this bridge glue-up. So far, excellent result. Thanks for the feedback. |
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| Author: | johnparchem [ Mon Nov 24, 2014 9:20 pm ] |
| Post subject: | Re: Gluing a Cocobolo Bridge |
CA is the only glue I ever had a problem using when gluing cocbolo. LMI glue new and old and tite bond has worked great. I do scrape the surface before gluing. |
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| Author: | Mike OMelia [ Tue Nov 25, 2014 12:17 am ] |
| Post subject: | Re: Gluing a Cocobolo Bridge |
It makes sense that you'd want to use a strong solvent to deplete surface oils. I have 6 to do and I fully intend to go the solvent route |
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| Author: | Greg Maxwell [ Tue Nov 25, 2014 9:58 am ] |
| Post subject: | Re: Gluing a Cocobolo Bridge |
I agree Mike. There are some who feel that using a stripper simply distributes the oil over the gluing surface, and this may be the case if done lightly. But a thorough cleaning makes sense to me and my Coco surfaces definitely look dry and much more glue-friendly after a deep cleaning with Acetone. |
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| Author: | ernie [ Wed Nov 26, 2014 9:50 am ] |
| Post subject: | Re: Gluing a Cocobolo Bridge |
I had one coco fb that failed , it was not cleaned ,it was at least 22yrold stock and the FB warped badly I used titebond and the coco was not 1/4sawn |
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