Re: Vacuum rather than Coolant...

fwir, altho all are pure elemental carbon, graphite, "carbon", and diamond
all have different properties due to differences in the carbon-carbon
lattice.
In regular carbon, there essentially is no lattice--just carbons sticking
together haphazardly.

In diamond, you have the lattices similar to the variety found in
crystalline minerals, ie, body centered cubic, face centered, etc, formed by
high pressure.
Diamond, btw, is thermodynamically *unstable*, and, in a few thousand years,
the Hope diamond might not be as big as it is today. Keep yer diamonds
refrigerated?? Ice on ice? :) :)

Graphite is, I think, sort of benzene-like loose 6-carbon rings (sans
hydrogen), approximately planar, which *slide* over each other in "plates",
thus giving it its lubricity. Some in fact call it a "crystallized carbon",
and, imo, might be the intermediary step toward forming a diamond, as it is,
or was, actually mined! Might could be made, as well, altho I don't know if
it actually is.
--
Mr. P.V.'d
formerly Droll Troll
"Cliff" <Clhuprich@xxxxxxx> wrote in message
news:v91ft1dsqb771mlvfqa4e0tmeu4vka2fn5@xxxxxxxxxx
> On Wed, 25 Jan 2006 11:53:08 GMT, "Pete C." <aux3.DOH.4@xxxxxxxx> wrote:
>
>>Cliff wrote:
>>>
>>> On Tue, 24 Jan 2006 22:49:18 GMT, "Pete C." <aux3.DOH.4@xxxxxxxx> wrote:
>>>
>>> >> They make milling machines with a vacuum system designed for
>>> >> graphite. I'm
>>> >> told these have very good filter systems on them, but, graphite is
>>> >> not
>>> >> considered hazardous.
>>> >
>>> >Not hazardous to humans at least, but it is very hazardous to machines.
>>> >That synthetic graphite is conductive, abrasive and very fine and will
>>> >get into everything that isn't totally sealed.
>>>
>>> But Graphite is a fine dry lubricant <G>.
>>> --
>>> Cliff
>>
>>Not synthetic graphite.
>
> That's like synthetic Hydrogen, right?
>
> What makes this abrasive but not normal Graphite?
> Chunks? Binder?
>
>>I had to replace a $700+ set of spindle bearings
>>that ingested the graphite dust before we modified the spindle cartridge
>>to lightly pressurize it.
>
> Well, any dust ...
> --
> Cliff


.

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