Steve W. wrote:
John Doe wrote:
Mike Spencer wrote:

Cydrome Leader writes:

I grabbed a drill doctor 750X to play with. It sounds great in
concept. Here's my first thoughts from playing with it for an hour last
night.
Gee, I've been using a little gadget I bought at Sears in the 70s
with great results. Has the same adjustable degrees of freedom as
an industrial version I used in a Michelin millwright/machine shop
mounted on a big pedestal grinder. The Michelin one handled over 2"
dia. while mine only does less than 3/4". Dunno what it's called or
who made it, unpromising pot metal construction but no problems in
40 years. Keep it mounted on its own little wheeled stand with a
cheapo spindle, old pump motor and the right side-grind wheel.

Post a YouTube video, or at least a picture. Or find a picture of it
on google images or wherever.

Sounds like the old General Tools No.825 AKA Craftsman #6677 drill
jig. Been around for ages AND if you pay attention to the directions
they work real well.

http://www.generaltools.com/825--Ori...ent_p_213.html

in use
https://www.youtube.com/watch?v=BQuFlmIPw3A

I have one myself and the only things I did different was to go buy a
separate grinder and side cutting wheel so it could be used easier.
I mounted it so that the wheel cuts at 90 degrees to the cutting edge
on the flute. That was done by simply attaching the jig on the
centerline of the grinder shaft so it contacts the wheel at the top.
This was done in response to a few people commenting on the bit
orientation causing possible fractures of the cutting edge due to the
stress risers from the grinding marks.

I've got a DD350 , can't get it to cut the relief properly . I also have one
of the Sears ones somewhere out in my shop - I've never set it up because it
requires a dedicated wheel and I haven't had a grinder bolted down to use it
.. The grinder is bolted down now , guess i better get a proper wheel on it
and try that puppy out .

--
Snag