"ATP" wrote in message
news snip-----
I've always used ferrous metal cutoff wheels but it seems as though a lack
of pressure or power leads to a very hard area to cut through. Could be
just
from the wheel loading up, though. The cheap 110 volt Ryobi type cutoff
saws
don't have nearly as much power as the more professional abrasive cutoff
saws. I think that contributes to the wheel just spinning in the cut, if
you
try to keep the saw moving through a solid section, it just bogs down.


What little experience I've had with an abrasive cutoff saw pretty much
parallels yours. Assuming you have the proper blade, it is my suggestion
that the wheel loads up, which prevents cutting. Higher pressure tends to
break down the wheel sllightly, exposing new, sharp grains, and eliminating
the loaded surface. Without the break down of the wheel, it begins acting
like a bearing and doesn't cut. It might be difficult for the operator to
distinguish between a loaded wheel or a glazed one, due to dissolution of
the abrasive, which dulls it excessively. For best results, make sure
you're using the proper wheel for the task at hand. It *really does* make a
difference.

Harold