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Posted by Ignoramus3107 on April 26, 2008, 1:47 pm
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In a pile of discarded punch blanks, I found a few "diamond
tools". These are relatively short round shanks, roughly 1/2x2 inch,
with a ~2mm diamond embedded in the end.
I know that these are useful for wheel dressing, but is there any
other use of them? Are they useful for cutting glass?
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Posted by Jon Elson on April 26, 2008, 4:22 pm
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Ignoramus3107 wrote:
> In a pile of discarded punch blanks, I found a few "diamond
> tools". These are relatively short round shanks, roughly 1/2x2 inch,
> with a ~2mm diamond embedded in the end.
>
> I know that these are useful for wheel dressing, but is there any
> other use of them? Are they useful for cutting glass?
>
No doubt you could dress them to a point and cut glass with
them, but the diamonds are pretty crude and might crumble.
They do a dandy job of dressing alumina wheels, though.
Jon
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Posted by Richard J Kinch on April 26, 2008, 5:10 pm
Please log in for more thread options Ignoramus3107 writes:
> I know that these are useful for wheel dressing, but is there any
> other use of them?
Relative hardness testing. Make a dimple with it using a force on an
unknown sample and compare the same force dimple made in various known
samples.
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Posted by DoN. Nichols on April 27, 2008, 10:27 pm
Please log in for more thread options > Ignoramus3107 writes:
>
>> I know that these are useful for wheel dressing, but is there any
>> other use of them?
>
> Relative hardness testing. Make a dimple with it using a force on an
> unknown sample and compare the same force dimple made in various known
> samples.
The standard diamond for that purpose is polished to a specific
angle cone, with a specific radius tip. And the usual practice is to
apply 5kg of force, zero the penetration meter, increase the force to a
specific value (which varies depending on the scale used), and then back
the force back down to 5kg and measure how far into the test sample the
point has moved. This is for several of the Rockwell hardness tests,
including the Rockwell C test.
there are some of the Rockwell tests which use a ball bearing of
a specific diameter instead, but the principle of use is similar. This
is more likely to be used for testing brass or something similar instead
of steel.
So -- if your diamonds are sharpened to a cone shape, with a
radiused tip, then they are probably used for such testing (but these
usually have a shoulder some distance behind the tip, while the stone
dressing ones don't, and are not likely to have nice smooth cones,
either. But they still could be used for comparative tests, even so.
And you can buy hardness standards used for checking the calibration
of the Rockwell hardness testers.
Enjoy,
DoN.
--
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---
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Posted by Martin H. Eastburn on April 26, 2008, 11:12 pm
Please log in for more thread options Solid shaft are used for side cutting. Hollow shafts (or end) are core cutters.
2mm is rather short for most things. Side cutting of 2mm or 1mm thick Copper or
what ever is rare. Try to do a search on MSC - see what they sell the product
for. They might be pcb routing or panel cutting units.
Might be useful in making name plates or face plates.
Martin
Martin H. Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
TSRA, Endowed; NRA LOH & Patron Member, Golden Eagle, Patriot's Medal.
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member.
http://lufkinced.com/
Ignoramus3107 wrote:
> In a pile of discarded punch blanks, I found a few "diamond
> tools". These are relatively short round shanks, roughly 1/2x2 inch,
> with a ~2mm diamond embedded in the end.
>
> I know that these are useful for wheel dressing, but is there any
> other use of them? Are they useful for cutting glass?
>
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> tools". These are relatively short round shanks, roughly 1/2x2 inch,
> with a ~2mm diamond embedded in the end.
>
> I know that these are useful for wheel dressing, but is there any
> other use of them? Are they useful for cutting glass?
>