"Larry Jaques" wrote in message
...
As we are on the subject: Do you use the sand-paper flap discs in your
angle
grinder? I meant those where the sand-paper is kind of layered around the
periphery of the disc and you do not need a plastic backing pad. I tried
one
and found that the point of contact with the work piece is quite different
from that of a ordinary disk with backing pad. Did not suit my purposes.
Why
are they thought better than the others? None of the shop staff gave me a
definite answer.

Yes, and I love them. They look like they'd wear out quickly but I
don't find that to be true. They cut as well as grinding disks, so I
may not be buying any more of the grinding disks. They don't get into
corners or under ledges quite as well, but that's the only limitation
I've found. The more metalwork I do lately, the more I like flap
sanding disks.

I try to remove relatively even amounts of metal from relatively large areas
of plate. The disks with backing tend to do that for me, the flap disks have
a very small area of contact with the work and it is hard to get the
flatness. Horses for courses I guess.

The corner work is also important to me: I was trying to clean up a small
weld from small piece of work (2.5") in a right angle corner. It is hard to
do with the flap disk and I just about managed it with an abrasive disk
without massacring everything around it.

Of course I may be to metalwork what Genghis Khan was to diplomacy...

--
Michael Koblic,
Campbell River, BC