Vince Pitelka on sat 13 feb 99
Some time ago there was a discussion of grinders and grinding wheels. I
posted a message about the masonry cup-stones we purchase from Grainger,
which are excellent for grinding down shelvs and other refractory surfaces.
They can only be used on a heavy duty 7" or 9" angle grinder, but if you
have one of those, nothing else can beat them. Someone emailed me asking
for further information on these stones, and I misplaced it. So I finally
got around to digging out the Grainger's catalog, and here's the info if
anyone still needs it.
Listed in Grainger catalog under "Rough Portable Wheels"
Norton 5" C-16-Q masonry cup stone, 5/8x11 spindle thread, max. 7260 RPM.
Grainger part number 6AO80. Norton model 662528-30722. $13.46 each, or
$12.11 in lots of five.
They also have a wide selection of abrasive flap wheels, which have been
discussed recently as an excellent means of smoothing the bottoms of pots.
As an example, an 80 grit 6" by 1" flap wheel with a 1" arbor hole (Grainger
part #4A193) is $17.70. They also sell the bushings to make the 1" arbor
hole fit the shaft on your bench grinder. And they also sell flap wheels in
dozens of sizes, down to little ones for die-grinders and drills.
These prices are from a 1997 catalog, so they may have gone up a bit.
- Vince
Vince Pitelka - vpitelka@DeKalb.net
Home 615/597-5376, work 615/597-6801, fax 615/597-6803
Appalachian Center for Crafts
Tennessee Technological University
1560 Craft Center Drive, Smithville TN 37166
Peter Atwood on sat 12 jun 99
Frank Gaydos writes that he is dissatisfied with his dead bench grinder and
would like an alternative. He wonders about the usefulness of a Dremel.
My advice is to leave the wimpy Dremel to the home hobbyist. I know, I know,
they have all sorts of attachments and what not but if you want a grinder
that will grind get a real machine. I recommend a hand held Milwaukee 4 inch
disc grinder. Many other brands would also suffice- Dewalt, Makita, Porter
Cable, etc.
The advantage in this type of grinder is that the wheel speed and the
material it is made from - usually aluminum oxide- results in very smooth
material removal compared to coarse grinding stones on a bench grinder.
Also, I think you have much more control over the angle at which you
approach the work. The only drawback is that you have to somehow hold the
work for grinding but I find all sorts of creative solutions ranging from
holding the work on the floor between my feet to wedging it in between other
objects. You could also get someone to carefully hold it for you (someone
with safety glasses and nerves of steel).
--Peter Atwood
_______________________________________________________________
Get Free Email and Do More On The Web. Visit http://www.msn.com
| |
|
