Daniel A. Mitchell wrote:

The drill-holding portion (vise and drill feed mechanism) are nearly
identical, with the long metal actuating handle tipped by a black
plastic ball. This can be seen to produce the desired rotation action to
grind the drill tip as desired. So far so good.

However, the support portion of my device is totally different. It has a
cast protractor device (to set lip angle) below the swinging
drill-holding portion. That's quite different han depicted in the manual
presented, but understandable.

Below that is yet another rotating joint actuateded by a second long
metal handle with another black plastic ball at the end (much like the
one mentioned above). Thus the device has TWO long actuating levers.
This second 'motion' seems to apply (or retract) the drill to/from the
gringing wheel. However, there is NO detent or stop to control it, so
there is no way to determine if the drill is in the correct location, or
in ANY repeatable position.

Below this indeterminate 'motion' is a fork shaped cast iron mounting
lug device, but it's unclear in what the orientation it is intended to
be placed. It CANNOT be fastened to the inside of the grinding wheel
guard where the normal rest is positioned. That geometry would not allow
the grinding fixture to even reach the wheel. It seems to mount in some
plane perpendicular to the FACE of the grinder guard. NO grinder I know
of has ANY mounting face in that location.

Is anyone familiar with the older Delta drill grinders, how they worked,
and how they mounted?

Dan Mitchell

Part of this sounds like the one down at school that is made by ,
or at least has the name on it, Atlas.
Does the feed for the bit have a "sort of" micrometer thimble?
and the bit holder is a "V" block clamp?
That description of a long handle with a black ball on the end
is what triggered this response.
...lew...