Those crazy-looking rotary scalers/brushes were readily available for a
couple of years (in the 70s, maybe), then almost unseen anywhere. I found
one at a flea market years ago, but don't know where it is right now.
Having used one of these tools, I can imagine that frequent injuries were
probably likely.

The wires were very coarse and high carbon, and could be resharpened with a
grinder, as you suggested. Better to grind them all the same length, though.

It wouldn't be very difficult to make a similar tool with a quantity of
allen/hex wrenches (with a loop or ring formed at one end) and a hub that
would allow them to swing. I haven't seen a source for hex wrenches like the
ones used in the folding multi-hex wrench type tool, but there may be some
of those available.

--
WB
..........
metalworking projects
www.kwagmire.com/metal_proj.html


"Doug White" wrote in message
...

I don't know if they still exist, but I have a gadget that goes in an
electric drill that consists of a hub attached to 6 or 8 bunches of
pivoting wires. They are about 0.05" in diameter, and stiff. It's sort
of like a poor man's needle scaler. Once the sharp corners wear off,
they don't work as well, but you can square them up on a grinder in no
time. I've used mine on a variety of surfaces, including concrete, which
is how I know about re-sharpening the thing. It makes a hell of a
racket.

I tried a quick search on the web, and couldn't get a good match.

Doug White