In article , Gunner says...

Because the crux of the matter is, Jim, HSS properly done, is heads
and hands sharper than carbide.

1) carbide will turn harder materials than HSS. This is
one reason for the hsm type to keep a selection of carbide
inserts handy.

2) *Coated* carbide inserts have a deliberately honed
edge. The uncoated ones (and I have used a *lot* of
these) are razor sharp and cut like it.

Jim

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