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Posted by Joseph Gwinn on April 8, 2008, 9:10 am
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> On Mon, 07 Apr 2008 22:16:46 -0400, Joseph Gwinn
>
> >
> >> On Sun, 06 Apr 2008 21:43:27 -0400, Joseph Gwinn
> >>
> >> >> >
[snip]
> >> >
> >> >I use a water-oil emulsion for cutting, and I worried that the water
> >> >would turn the paper into mush. Maybe the paper needs to be soaked in
> >> >way oil first.
> >>
> >> It won't turn into mush when its clamped under the tool holder.
> >> >
> >> >I was also thinking of using electrical "fishpaper" (vulcanized fiber)
> >> >in place of the legal paper. Fishpaper is *very* strong. Fish are not
> >> >involved; I have no idea where the name came from.
> >> >
> >> >I've also been thinking that the paper might benefit from being sealed
> >> >with shellac. Application would be by dipping in shellac diluted with
> >> >alcohol.
> >> >
> >> Try the yellow paper. Ill send you a dollar to buy a pad at the 99c
> >> store. <G>
> >
> >The issue is that I don't want to have to keep replacing the "gasket",
> >mainly because it may become a nuisance when everything is coated with
> >baby blue emulsion.
>
> You won't have to replace it very often.
I will see how it goes in my shop.
> >> >> >> And learn to sharpen/setup/line up your cutting tools better. A cut
> >> >> >> shouldn't take all that much pressure to accomplish unless they are
> >> >> >> dull, or you are feeding way too fast
> >> >> >
> >> >> >It was not quite razor sharp, but it wasn't dull either. But it won't
> >> >> >hurt to sharpen it.
> >> >> >
> >> >> >I suspect the real problem (aside from the toolpost rotating) was that
> >> >> >I
> >> >> >was simply pushing too hard, as I learn the feel of cutting off. This
> >> >> >is the part that must be learned by using the lathe, that cannot be
> >> >> >learned by reading books.
> >> >> >
> >> >> >Joe Gwinn
> >> >>
> >> >> Good thinking and sorta echoed my own thoughts. It takes time to get
> >> >> a feel, or read the recommended speeds and feeds and set your travel
> >> >> accordingly.
> >> >>
> >> >> I tend to make blue chips..push harder than most might, but I know my
> >> >> machines, my tooling.
> >> >
> >> >Well, I've been managing pale yellow to brown chips mostly, and did
> >> >manage blue while doing roughing-cut experiments. This while using
> >> >brushed-on black sulfur oil. But since I started using the sprayed
> >> >water-oil emulsion, things have been boringly cool, and all chips are
> >> >shiney. But the emulsion is baby blue.
> >> >
> >> >Joe Gwinn
> >>
> >>
> >> Black sulpher oil works good for pipe threading using dies, but not so
> >> great for lathe work. You have to thin it out a bit.
> >
> >And the best thinner is carbon tetrachloride, with trichloroethylene a
> >close second?
>
> No idea.
> I use only oil in the lathe, but proper lathe cutting oil, usually
> high sulfur, but much thinner. When I run low, I ask a customer for
> a few gallons.
I was kind of pulling your leg. Good luck getting either solvent,
although they would work well. And you would be *very* happy from the
solvent fumes. Till you passed out.
What kind of oil do you use, by make and model?
Joe Gwinn
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>> I was initially taught in junior high metal class to part at a slow
>> speed but later in high school machining class where the instructor was
>> a machinist, he said to run at the recommended speed for the material if
>> the machine could cope as parting was a cutting operation like any
>> other. Still works for me. The junior high lathe was a little Southbend
>> so needed running slow.