Brazing ~ Luthiery Laboratories

Brazing

Brazing is essentially the same process as soldering. Two metal pieces are joined using a third metal with a melting point well below either of them. Brazing is useful for joining metals that cannot be welded, as well as dissimilar metals.

Brazing is also useful for joining heat-treated steels that would be ruined by welding. This was once paramount in bicycle frame construction, before cheap automated aluminum welding took over the market.

Finally, brazing is useful because you can do it with just a common propane torch. See my pages on truss rods for some designs you can build yourself from common hardware.

Workshop - Miscellaneous

This is a bunch of random stuff that doesn't categorize well anywhere else.

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Double-Acting Truss Rod

This is a spoke nut version, for use at the neck heel.

Here is a variation intended to adjust at the headstock rather than the heel, although it would work fine there too. I substituted a 1-1/2" 10-32 SS cap-head bolt for my usual spoke nut and threaded shaft. It is captured the same way, in a drilled-out coupling nut with a ground-down hex nut. The rod itself is 48" 3/16 rod steel, bent back on itself. Both coupling nuts are grooved on the attaching surface to hold the round rod. This greatly simplifies alignment and assembly, and the cap-head bolt eliminates one solder joint. All parts from my favorite luthiery supply shop, Home Depot.

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Scrapers

*Don't get caught in prison with one of these*

After making a muddle of things with a razor blade and several other implements that proved to be less than satisfactory, I decided I needed to have the right tool - something roughly pencil-sized that can be handled with precision and ease, with a proper scraper edge. I took a look at StewMac, and found their binding scraper - exactly what I was thinking of. But with shipping, it would cost $15, and I'd have to wait a week for it, and after all, it's just a piece of steel. So I started thinking and remembered I have some 1/2" steel binding strap material. This is the stuff that is used around very large heavy boxes. It is a fairly hard and springy type of steel that would probably make a good tool. So I got busy in the shop and made three scrapers.

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