According to Grant Erwin :
I have used cheap air chisels a few times, and they have gotten me out of
jams. Once I had to remove the bed wood from a truck. In those days they
drilled down through the wood & bed and ran a nut up onto the screw. The
nuts were all rusted on forever tight, so I used an air chisel. Worked
great. I recently used it to cut through spot welds, worked great there
too.

Biggest thing is to make sure you are wearing leather gloves. I got some
nasty cuts and pinches learning that.

Thanks -- just as I should *not* be (and am not) wearing gloves
when using the power tools (lathe, mill, drill press, shaper).

I don't know if there is a definitive use for those chisels. That's a tool
you tend to pull out when there isn't any other way, and one of the chisels
looks like it will work.

O.K. The ones which have me most puzzled are the ones with a
Y-shaped open end -- and especially the one which is not quite
symmetrical, and with the outer corners rather rounded and the smaller
"wing" thinner than the larger one. The straight chisels are pretty
obvious, and the straight with a notch dead center I would guess is for
popping spot welds. The long tapered round one I figure is for driving
out (and in) taper pins or scroll pins of appropriate size.

The chisels aren't all that hard, or mine weren't. I dressed new edges on them
every so often when I was doing that truck bed job.

I would not expect them to be too hard, or they would be
chipping more than the workpiece. :-)

Thanks,
DoN.

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