"Grant Erwin" wrote in message
...
R. O'Brian wrote:

You luck is running good, MSC has them on clearance at about 40% off.

100 grit YQ04242426, 220 Grit YQ04242475, $54.75 ea.

You cannot purchase them on the net. Call 1-800-645-7270

Randy

Oops, my luck just ran out. MSC has no stock and isn't getting any
more, sigh. They're looking for me, they'll let me know tomorrow, but
as for now, I'm still looking for CBN plate mounted wheels.

Harold, please take it easy on me. I heard loud and clear that diamond
isn't the abrasive of choice for HSS, but lots of guys have told me
that borazon or CBN work really well for a finish grind. A Baldor No.
500 is a "carbide grinder" with tilting tables and plate-mounted wheels,
and it runs at 3450 rpm. which is *way* too fast to grind HSS with
diamond, yes.

Grant

Shrug!

Ok, easy it is. However, I can't see a reason to use anything beyond
aluminum oxide. I especially can't see a good reason to use a carbide type
grinder for HSS. At best, they're too restrictive to be functional.

One of the negatives of using a machine with a table is you'll *never* gain
any skill at sharpening. As long as you permit a machine to do the work,
you'll not progress. You'll also be limited as to how you can apply your
tool steel to the wheel. I refuse to use anything that gets in the way,
including a work rest of any description.

I was brought up through the trade when there was almost no insert carbide
tooling, and HSS was the order of the day, chiefly because brazed carbide
was still relatively new and not nearly as good as carbide is today. I was
on the tail end of Stellite, which damned few that are machining today can
claim. As a result, we were forced to learn to grind tools, or you had to
find different employment. One was taught the basics, then was expected to
apply them to sharpening. I can't think of any better advice for the home
shop type. Any of the dodges you use to avoid learning will simply hold
you captive. That includes the grinder of which you speak.

Harold