On Fri, 21 Nov 2003 23:06:18 -0800, "Harold & Susan Vordos"
wrote:


"Gunner" wrote in message
.. .
On Fri, 21 Nov 2003 18:54:04 -0800, "Harold & Susan Vordos"
wrote:


"Grant Erwin" wrote in message
...
I'm amazed at how closed-minded some people are in the face of
such staggering amounts of experience and accumulated knowledge.
As far as I'm concerned, Harold, you have totally proven your case
and don't need to respond to this thread any more! - GWE


Thanks, Grant.

I feel compelled to dispel misleading information, particularly in this
instance. The problems from wrong wheel selection are overwhelming,
speaking from experience. To get a better understanding of the
significance of the wrong wheel, try grinding some steel on your surface
grinder using a silicon carbide wheel. The net effect, and almost
instantly, is for the wheel to glaze over. Hardness of the bond makes
no
difference, regardless of how you approach the problem, it persists.
Change to an aluminum oxide wheel and it "magically" goes away. The
research accomplished by Norton was right on the money.

Harold

So I take it Im not supposed to use the red wheels when grinding
aluminum or nylon?

Gunner

The red wheels, if they are the ruby red, are aluminum oxide, just as the
old salmon colored wheels are. The choice in both instances would be
silicon carbide, although I'm not sure that grinding nylon is done well with
either of them.

I hope you're removing the leg before grinding the nylon, Gunner! g

Harold

I thought pulling yours would be more fun G

Gunner

"The British attitude is to treat society like a game preserve where a
certain percentage of the 'antelope' are expected to be eaten by the
"lions".
Christopher Morton