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Lining/Kerfing for tight curves
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Author:  Tom Harbin [ Fri Feb 29, 2008 6:53 pm ]
Post subject:  Lining/Kerfing for tight curves
Wondering if there is a source for some of the kerfing that makes tighter radii. I've been cutting some of the regular, but would be nice to be able to buy some that was easier to bend around cutaways, etc. Also, I appreciate the input on the Stew Mac shop stand by. I look forward to more great input about my kerfing question. thanks, Tom Harbin
Author:  Dave Livermore [ Fri Feb 29, 2008 8:14 pm ]
Post subject:  Re: Lining/Kerfing for tight curves
Good question.

One I've pondered and lied awake at night contemplating myself.

Something that rang true was the fact that the kerfed lining is essentially small blocks of wood connected in line by a thin strip of in tact veneer. Many luthiers construction in aged traditions don't use kerfed linings, but linings of blocks rather than kerfs.

In the tight bends of a cutaway, I separate the kerfs and use the resulting single blocks for the lining. It is tough to tell the difference when examining it from the sound hole.

That's just my $.02 worth.

Dave

PS I think I posted this same question some time ago. If you follow it up with the same question about how to bend the binding and purfling in a tight radius, let me know and I'll tell you what I came up with.
Author:  Rod True [ Fri Feb 29, 2008 9:13 pm ]
Post subject:  Re: Lining/Kerfing for tight curves
Tom have you thought about using a solid piece of wood cut out (maybe in a couple of pieces) to the shape of the cutaway.

Jim Olson does this on his cut aways, he makes florentine cutaways mind you and this works for him, here's a picture off his website.

Image

If you're making venetian cutaways, you mit try making solid laminated linings. Take 3 or 4 pieces of 0.060" pieces, bend them in your bender and glue them onto your side maybe 2 at a time. You could use cedar strips for this and they would be lite weight too.
Author:  RaymundH [ Fri Feb 29, 2008 10:00 pm ]
Post subject:  Re: Lining/Kerfing for tight curves
Check out Kevin Ryan's new A4 Kerfing. There's a write up on his web site http://www.ryanguitars.com
Author:  JBreault [ Sat Mar 01, 2008 11:53 am ]
Post subject:  Re: Lining/Kerfing for tight curves
I cut extra kerfs in the waist area of my lining in order to make the bend.
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Author:  Terence Kennedy [ Sat Mar 01, 2008 1:29 pm ]
Post subject:  Re: Lining/Kerfing for tight curves
I've had pretty good luck bending the LMI reverse kerfed linings with moisture and my bending iron for tighter curves.
Terry
Author:  Blanchard [ Sat Mar 01, 2008 5:17 pm ]
Post subject:  Re: Lining/Kerfing for tight curves
"Double kerfing" has worked well for me. Use a Japanese back saw to cut another kerf right in the middle of each block.

If you lay the kerfing, non-kerfed side down, on your work bench and lay a strip of .030" thick brass on either side of it, you can cut with the saw until it touches both pieces of brass. That will leave just the right amount of wood thickness at the bottom of the kerf.

Mark
Author:  Tom Harbin [ Sat Mar 01, 2008 7:53 pm ]
Post subject:  Re: Lining/Kerfing for tight curves
Thanks for the replies! I would not have guessed that Olson's cutaways are as beefy as they appear. Got some experimenting to do with your help! Tom
Author:  Steve Brown [ Sat Mar 01, 2008 7:59 pm ]
Post subject:  Re: Lining/Kerfing for tight curves
I have some tight radius kerf lining in spanish cedar from the Martin guitar factory. If you need some of that I can send you some.


Steve Brown
steve@customlightandsound.com
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