| Official Luthiers Forum! https://www.luthiersforum.com/forum/ |
|
| Side Cracking - Help https://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=41598 |
Page 1 of 1 |
| Author: | Peter Norman [ Mon Oct 07, 2013 7:52 am ] |
| Post subject: | Side Cracking - Help |
I tried bending maple sides this morning, it seemed to bending quite easily, and while bending the waist, it started to cracked. I bent one side no problem, bent dry and spritzed with water on my bending iron. The sides are 2.2mm thick. My plan was to glue the crack try using a flat iron to bend the crack down to mate with the side again. Will this work? and what type of glue to use? I was going to use CA glue, but wasn't sure if it would bend. My glue options are CA "Super T" and "Hot Stuff", fish glue and yellow wood glue |
|
| Author: | Cush [ Mon Oct 07, 2013 9:10 am ] |
| Post subject: | Re: Side Cracking - Help |
A vertical crack that follows the curl can sometimes be sanded out, if it isn't too deep. Then reinforce the inside with a full width brace. If you glue it together you will be able to see the repair. Sometimes it's best to just start over with a new rib set. It depends on how deep the crack is and who is buying the guitar. If the crack is on the inside just glue it , brace it and don't tell any one. |
|
| Author: | Goodin [ Mon Oct 07, 2013 9:15 am ] |
| Post subject: | Re: Side Cracking - Help |
Your best solution is to scrap the side and start over, hopefully with a matching sister. The next step would be to try to continue to bend while carefully working around the crack (and keeping it clean like Filippo says) then glue the crack with titebond or hide glue after it's bent close to final shape and dried. You can then attempt minor touch up bending in the cracked area but not too much heat as the glue will release. You should expect the crack to show on maple. I would suggest starting over and experimenting with your technique. Try more water on the wood, change the heat, try less pressure/more pressure, change movements and length of time on the pipe, etc. Hand bending on a pipe is an art and takes practice and experimenting. |
|
| Author: | Mike Collins [ Wed Oct 09, 2013 2:08 pm ] |
| Post subject: | Re: Side Cracking - Help |
Is it a crack or fracture? Sounds like a fracture. Fractures can happen when bending with figured woods. Is the Maple curly/Quilted? A fracture happens when figured woods especially do not have a support on the outside of the bend. Usually they are 10-20mm across but can go right through to the other side of the side. Is your side bent to the shape you want it? If so- Make cauls that will fit the area. Inside & outside. Cover them with wax paper. Heat the area with a soldering iron wrapped in Alum. foil This helps with getting the wood to want to go back where it came from. apply a clear drying glue like fish or LMI's white. Clamp & all should be good if ya did a good fit of the cauls. Mike |
|
| Author: | B. Howard [ Wed Oct 09, 2013 3:19 pm ] |
| Post subject: | Re: Side Cracking - Help |
Unless you are planing to paint the guitar it will most likely show through the finish. Maple is that way, just plain hard to hide any type of damage or misstep at all under a clear finish. |
|
| Author: | Peter Norman [ Thu Oct 10, 2013 10:27 am ] |
| Post subject: | Re: Side Cracking - Help |
Thanks; mike you are right it is a fracture. I was able to glue it and bend it to final shape. The fracture wasn't all the way through the rib. It was figured, all in all I think it may work ok. I will follow your advise on the cauls. Thanks |
|
| Page 1 of 1 | All times are UTC - 5 hours |
| Powered by phpBB® Forum Software © phpBB Group http://www.phpbb.com/ |
|