On 2009-08-18, Ignoramus21124 wrote:
OK, last dumb question, I swear.

Carbide inserts do not need grinding.

They may in their production -- but you don't want to grind ones
after they have gotten dull in use.

Brazed carbide bits cannot be ground with diamond.

They can -- if you *first* undercut the steel with standard
grinding wheels, so the diamond won't touch the steel. The brazing is
no problem to the diamond, just steel or iron. It would help to have
fixtures to prevent the angle shifting which might allow the steel to
touch the diamond wheel.

Anything else can be ground with green wheels.

Not well. You get poor edges with green wheels on carbide, and
green wheels are too soft to work well on mild steels.

Why,. then, the need for diamond wheels?

To make a good sharp edge on the carbide -- either the brazed
carbide inserts, or as a manufacturing step in the production of the
replaceable carbide inserts.

Listen to Harold -- this is his primary field.

Enjoy,
DoN.

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