On Aug 21, 1:46 pm, Joe Strout wrote:
I need to cut 1/16"-inch aluminum angle stock. And, to be clear up
front, I'm a total newbie to metalworking (and not too experienced with
tools in general).

So, I bought a 6-inch cutoff saw from Harbor Freight with aluminum oxide
grinding discs. Turns out that this is not safe to use with aluminum
stock; the disc make shatter.

It's been suggested that I put a saw blade on the same machine (any
6-inch blade with a 5/8" or 7/8" arbor should fit). I found this one, a
diamond segmented blade:

http://www.toolbarn.com/product/makita/A-94708/

But now I'm suspicious of making assumptions about what a given tool can
cut. Would this be good for cutting aluminum? Or should I keep
searching for a carbide blade?

Cutting aluminum is like cutting rubber or even butter. Really. It's
soft and gummy compared to "hard" metals. It'll gum up the teeth of
almost anything you mentioned already :-).

If the answer is carbide, can anyone recommend a good source for these?
I'd need one the right size, and (as I understand it) a large number of
small teeth, since the stock I'm cutting is so thin.

A large number of small teeth is good. Something that gets gummed up
is not good. See e.g. McMaster-Carr page 2323 for nonferrous cutting
blades.

For casual use, woodworking saw blades will do just fine on aluminum.

Tim.