Ron,
The horror! The horror!
The only real issue is the RPM difference. A abrasive cutoff saw and more
importantly, the abrasive disk is designed for 3200 - 3600 RPM. Most wood
miter saws operate from 4000 to 5400 RPM. Abrasive disks do not work well
out of their operational range.

As for the project, cutting 0.125" x 1.00" angle with a circular saw (I use
a SkillMag77) is a snap and plenty accurate for welding. If you are having
problems, the sawzall will also work fine with the correct blade and proper
speed. (Slower blade speed than wood)

Dave


"Ron M." wrote in message
oups.com...
I want to put an abrasive metal-cutting wheel on a miter saw, to cut
mild steel angle with. Most of this will be 3/32" or 1/8" 1-inch angle.
Some say, "sure, no problem!" while others say, "the horror, the
horror..." The purpose is to cut a few pieces for some welding
projects. For example, cutting some angle steel at 45 degrees to make a
table top.

Now, before this goes any further, please do *NOT* tell me to "go buy a
chop saw" or "buy a used band saw" or whatever. I'm talking about a
miter saw ONLY, OK?

There are supposed to be two main issues with doing this:

First, it overloads the motor. But I don't think this would happen, if
you just use very light pressure and take your time and go slow.

Second, the shavings/sparks can damage the fence and/or the motor
mechanism (bearings). There may be some truth here. The fence shouldn't
be a problem, and I can always cover it with something. Particles? Some
suggest removing the vacuum. How about attaching the nozzle of my shop
vac just behind the blade and letting it catch them? Or maybe putting a
big magnet there, perhaps.

This isn't something I'll be doing often. Maybe once a month I'll make
3 or 4 cuts, at the most, no more. As I said, 99% is going to be
cutting 45 degree ends in 1/8" X 1" angle, so I can join them together
to make a square corner. That's it.

I use an abrasive blade in my circular saw for straight cuts, but it's
hard to cut accurate angles with it. I also have a Porter-Cable Tiger
sawzall, I don't think that would work well for this kind of cutting,
although I've never tried it.

Please give me a tip here, especially if you've actually done it, and
aren't just repeating what you've read or heard. And PLEASE don't tell
me to "go buy a chop saw"!!!

Thanks,
Ron M.