Official Luthiers Forum!
http://www.luthiersforum.com/forum/

Sound Port Backing?
http://www.luthiersforum.com/forum/viewtopic.php?f=10101&t=28652		 Page 1 of 1
Author:  Paul Burner [ Tue Aug 17, 2010 2:58 pm ]
Post subject:  Sound Port Backing?
Would a couple layers of .010 veneer be enough backing support for a sound port that is just an oval shape or will I need a layer of wood?
Author:  Chris Ensor [ Tue Aug 17, 2010 3:14 pm ]
Post subject:  Re: Sound Port Backing?
I have seen people use no backing at all. But I like to use at least some. I usually don't use any less than .060" though. But maybe that just me.
Author:  LuthierSupplier [ Tue Aug 17, 2010 3:57 pm ]
Post subject:  Re: Sound Port Backing?
I just theorizing here...but if the port is on a curve it will be stronger than if it was on a flat area. However, since end grain is exposed, I think it is a good idea to protect it from splitting. Any veneer would be better than none. I've never done a oval soundhole, so I've always backed mine with 2 .10 veneers B/W. I'm sure you will be fine with or without. It is more about insurance than anything.
Author:  Peter J [ Tue Aug 17, 2010 4:04 pm ]
Post subject:  Re: Sound Port Backing?
Paul, I agree with Tracy... you can stack a couple of layers of veneer and match your binding and purflings for a little extra flair..
I have seen them with no backing at all but I prefer a bit of insurance. The layers of veneer can be installed cross grain to each other for a high degree of strength.

Attachment:
Compl007(Medium).JPG
Author:  TonyKarol [ Tue Aug 17, 2010 4:07 pm ]
Post subject:  Re: Sound Port Backing?
I use either veneers, 20-40 thou, or sometimes and most often just a couple cross braces near where the hole will be.

My house guitar (OM) had one added long after it was built .... no reinforcement, and its fine. I wouldnt want to hit it there, but in normal use it wont do anything.
Page 1 of 1 All times are UTC - 5 hours
Powered by phpBB® Forum Software © phpBB Group
http://www.phpbb.com/