Lew Hartswick wrote:
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...
Yes, that sounds exactly like it. The original responder offered a site
to get a .pdf file of the manual for the Rockwell drill grinder ...
http://www.owwm.com/pubs/detail.asp?id=875.

This Rockwell grinder attachment is obviously some derivation (later,
most likely) of the Delta attachment that I have. SOME parts are the
same, exactly ... the rest is TOTALLY different.

It's quite possible that Atlas got into the act at some time too.

Dan Mitchell
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