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DoN. Nichols
 
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Default Dumore TP Grinder (was: FA: Dumore Tool Post Grinder Inserts)

According to Glenn :

"DoN. Nichols" wrote in message


[ ... ]

I believe that it will do for the task.

Thank you for this.


Quite Welcome


[ ... ]

And also on page 2 is the all upper case:

"WARNING: DO NOT EXCEED WHEEL SPEED RECOMMENDATIONS."

(But no exclamation point at the end. :-)

The manual is obviously older than my grinder, because of the
lack of 3-pin power connectors. But it is obviously for the same
grinder, as the model number (first four digits of the serial number)
matches.


Kinda fun looking at these old manuals .. especially the price list :-)


Yep! I wish that we could still get things at those prices. :-)

[ ... ]

The added info in the .txt file will help as well. I am glad to
get confirmation that the spindle thread was originally 1/4-32.

Was there only the one "Chuck assembly" with a 1/8" bore? That
would appear to be the case, based on the parts list and drawing.


Only 1 chuck came with mine. There is a hombrew thing in there for holding
a stone but it has no threads and the stone is glued to the brass.


O.K. The manual only shows the one chuck.

I am now most of the way through making the chuck for mine. I
need to make a D-reamer to cut the taper inside the nut, and then I need
to slot the collet, and cut the wrench flats on both. I had to
single-point cut the threads in the nut -- I wish that I had known to
order a 5/16-32 tap while I was ordering the 1/4-32. :-)

And -- I have verified that the arbor nut (and the pulley nuts)
on mine are all 7/16" across flats.

Also -- I have verified that the height range will bring it up
to center height with no problems on my Clausing -- and that I need to
make a T-nut to fit the Clasuing, as the one which is there is too tiny
and has to be inserted rotated to bite at all.

So -- the largest wheel really was a 2" one. I've got some
larger ones which I have adapted to the spindle which are still well
within their speed rating -- but perhaps the motor does not have the
horsepower to drive the larger wheels. I guess that I'll find out.


Mine drives a 2.5" wheel ok.


I've got a pair of wheels (which did not come with it) which are
nearly 3" diameter, and which finally defined the ID of the guard.

The design of the diamond holder is different than I had
expected -- but makes sense if you have to re-dress the wheel part-way
through the task.

I don't see the diamond holder listed in the parts list, nor in
the drawing.


Mine dosen't have the wheel dresser either but I intend to make one.


As do I -- though I may try some other ideas for initial
dressing (mount in the collet before the workpiece goes in, not on the
workpiece), and save the shape shown in the manual for dressing in the
middle of a project.

Again, thanks,
DoN.



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