"Lloyd E. Sponenburgh" lloydspinsidemindspring.com Inscribed thus:

Bob Engelhardt fired this volley in
:

Whattaya think

Bob,

I think, unless you're still using a lantern toolpost, that there has
been a LOT of tool holder research done since the 1800s, and there
have come many better designs. Even Craftsman sold ones that worked
similarly for their baby Atlas (for a lantern post).

There's nothing remarkable about that design. It's just an
offset-head, built-in back rake, built in side-rake holder -- allows
you to grind tools with no back rake or side rake on the bit, having
only to grind the front and side relief angles, and the profile. That
makes it easier on the tool grinder fellow; but it's nothing unique
today.

It has more mystique than method to it.

LLoyd

I agree !
Producing low cost holders for carbide inserts would be more cost
effective.

--
Best Regards:
Baron.