2010-03-28

Here we go

I've always wanted to build a guitar from nearly scratch, which to me means constructing the neck as well as the body. I've finally decided to do it. I've already started buying materials and assembling some of the materials I'll need to build the neck. I am making this up as I go along, although I have done a bunch of internet research.

I was going to build the neck from a laminate of carbon fiber and epoxy, plus some kind of fancy tone wood - initially, I was thinking mahogany. Then I checked out the price of mahogany and settled on basswood. Basswood? That's for making guitar bodies! Well, please consider a few things:
  1. It's cheap - I got it from National Balsa Wood Company; here is the page for 36" long basswood sheets; mine are 1/16" x 4"
  2. I just read yesterday that Parkers have composite-wrapped basswood necks, and people seem to like those alright
  3. There's a good chance I'll mess up and have to try again, and like I said, it's cheap
In the picture of the basswood sheets, with my Samick jazz box for a size comparison (a good guitar, but I have no idea why I own it), you can see a stack of 16 sheets, each 1/16" thick. I measured the thickness of several guitar necks and they always come in under an inch (minus the fingerboard layer). Only after I ordered the wood did I realize that after I laminate stuff between the basswood, it's going to be thicker than an inch by some as-yet-unknown amount.

Next, after I checked the price of carbon fiber cloth ($30+/yard) I decided to go with fiberglass. Here's why:
  1. It's cheap - I got it for about $7/yard from US Composites; here is the page for fiberglass cloth; mine is the 8.9oz S-glass, which is an upgrade from the "regular
  2. There's a good chance I'll mess up and have to try again, and like I said, it's cheap


In the picture of the fiberglass, from left to right is the 635 epoxy, the medium duration hardener, a little jar of blue dye (my idea is to stain the neck blue, so maybe this will help tone down the epoxy stripes), some measuring cups, and the fiberglass itself - 3 yards of it.

Here's my parts list so far, along with cost:

Basswood from National Balsa:

CodeItemQtyPriceTotal
116436B1/16 x 4 x 36 basswood sheets16$1.76$28.16

Fiberglass and epoxy from US Composites:

EPOX-635313 Medium 635 1/2 gallon,
  21.3oz $34.25
FG-6781-38  8.9oz S Glass -
Satin Weave Thickness: 0.0097"
4 yards @ 13.95/yd
TRA - PB001 1oz transparent blue tint
   (< .25oz/gallon) 5.95
CON-C08 25x 8oz graduated plastic cups 5.5

Total: I'm about $130 into this thing already. Wow.

NEXT: A "heat box" to cure the laminate!

4 comments:

  1. Looks potentially messy. :)

    Like any start up, there's going to be initial investment costs (equipment and materials). These can be recouped over time and production. When we (you, Bob and I) started homebrewing, there was all that equipment we had to buy. But you buy it once and you're done. You just have to buy the ingredients with each batch. The same should apply here. Except maybe your consumption rate on epoxy will be low enough to spread over a few guitars rather than just one. Hopefully.

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  2. We'll see about the epoxy very shortly. A rule of thumb I've heard is that you use 50% epoxy and 50% fabric by weight; if I'm using two layers of 8.9oz glass cloth between each sheet, then somebody who has intellectual discipline could calculate roughly how much epoxy I'm actually going to go through.

    That person is not me.

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  3. I've heard a rule of thumb that the epoxy should be half the composite by weight. Given 8.9oz glass cloth at two thicknesses per layer, a intellectually motivated person could probably calculate the epoxy usage for this project, assuming I can apply it correctly.

    ReplyDelete
  4. I guess you're going to find out the hard way. :)

    ReplyDelete