I haven't tried the new replacement for Freon. What I have done is used CO2 for my spray coolant for larger projects. It works well for my things. I have a 10 pound ( I think) and a 80 pounder in the hot shop. I use CO2 for carbon steel with MIG welding, so I do have it on hand.
Jerry
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At 06:03 PM 6/20/2003, you wrote:
I am a newbie to the group. I know that many plastics
become brittle at (very) low temperatures. Some of
them need to be treated with liquid nitrogen to make
them brittle.
One experiment someone can try is to keep the piece in
a freezer for a couple of hours and then try to
machine it.
Liquid nitrogen is dangerous in some ways (don't try
to dip your body parts in it - they will break off
too) but something else that can be sprayed to cool
the work piece (The newer Freon?) may do the job.
Don't know how it will affect the cutting tool though.
I don't have a lathe yet. I joined the group to hang
around & read various discussions to get a feel of
what I should buy. May be in a few months ...
Chip_User
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--- Richard Albers <rralbers@...> wrote:
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We just live with it. I don't think it is
possible to break such
a soft material into smaller chips. It *may* be
possible to grab the
string with pliers and break it (or just hold it
away from the cut),
but I do not recommend this for most HSMs - it would
be too easy to
get into trouble. Like watching the chip,and
forgetting to stop the
cut before the bit hits the chuck (lots of us have
done that :-o).
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