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#1
02-22-2020, 01:23 PM
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Thicknessing sides for a cutaway
I'm about to undertake my first from-scratch cutaway guitar, using East Indian Rosewood, but I'm not sure how that very tight bend at the upper bout is formed.
I'm doing all hand-bending, and it occurred to me that while I plan to be thicknessing the sides to 3/32" overall, that particular bend would be easier if I reduced the thickness to around 1/16" just for that small area area. Is this ever done with cutaways? Are there any drawbacks I'm not seeing?
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Yamaha FG-411-12 String Oscar Teller 7119 classical (built in 1967) and a bunch of guitars and mandolins I've made ... OM, OO, acoustic bass, cittern, octave mandolin, mandola, etc. ... some of which I've kept. 
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#2
02-22-2020, 02:59 PM
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Your first guitar, or first guitar with cutaway?
Pointy two-piece cutaway, or continuous bend cutaway? I thin sides to 2.2 mm. For tight cutaways, I'll thin the tightest parts of the bend to less, depending upon how tight the bend is. I've gone as thin as about 1.5 mm for very tight bends and compound bends - bending the side both length and cross wise to follow the contour of the heel. The thinner the sides, the potentially more fragile. I've just made my first two-ply laminated sides. I'll likely laminate all sides going forward, which also has benefits for tight bends.
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#3
02-22-2020, 03:33 PM
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3/32" translates, on my StewMac veneer caliper, to anywhere from .08" to nearly .1"., and is actually a bit over .9". This is too vague for our work, and unnecessary thick for the job, at least in my shop. EIR sides might be fine closer to .078, depending on the actual piece, and .065 at the tight bend.
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#4
02-26-2020, 07:55 PM
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Quote:
__________________
Yamaha FG-411-12 String Oscar Teller 7119 classical (built in 1967) and a bunch of guitars and mandolins I've made ... OM, OO, acoustic bass, cittern, octave mandolin, mandola, etc. ... some of which I've kept.
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