My Clausing has a flood coolant system. Which actually works, except
the switch for it does not work. I will fix it, but the pump is
working great. I have cleaned up the system somewhat and it is running
smoothly. For coolant, I used a water soluble oil from McMaster that I
diluted about 40:1. This oil is not so bad, as I kept a jar of it
diluted for about half a year, and it did not separate and did not
My question is, would occasional use of this coolant rust the lathe.
For cheap insurance you might want to find a way to heat the tank,
just in case. It will also heat the lathe a bit, so it isn't the
coldest lump of iron in the room making it a condensation magnet.
Something really crude like a 100W Rough Service incandescent lamp
in the base of the machine over the coolant sump should do it. It'll
warm the frame and the heat will rise through the works.
Do NOT put it where it will get dripped on.
I'm curious about this. I'm assuming your "RV antifreeze" is propylene
glycol, rather than ethylene glycol. Are you getting any nasty fumes off of
it? P.G. is supposedly safe at normal temperatures, but the temperature at
the cutting edge is not normal. It's hot enough to smoke coolant.
Did you check on the safety of this before loading it in the reservoir?
I have used soluable oil on several of my machines over the years and I have
found it to be a first class pain. I am a hobbiest. I do not run my machines
sometimes for weeks on end. Soluable oil does not like this. The water
evaporates, the tanks form slime, the residual oil left on the lathe itself
leaves a sticky scum over time that is difficult and hard work to remove. On
your question about rust, the answer is sometimes. It depends on what one
you use and the concentration. What I do now is keep a portable CoolMist
system that I can move from machine to machine when required and at the big
L & S keep the coolant tank filled with regular cutting oil for the heavy
steel jobs. This suits me much better than filling the coolant systems with
water based coolant.
For What it's Worth,
I'm using Hangsterfer's S-500 at about 20:1 aand have had no odor problems
in 2 years of very sporadic use. There is a light black coating on exposed
metal, but that cleans up easily with some steel wool and a little WD-40.
Tramp oil (from way oil?) is the biggest problem but a belt skimmer seems to
take care of that.
That said, I suspect that flood coolant is more beneficial on a mill than a
lathe, at least for the hobbyist.
Gee, I hope not, because that's exactly what I'm doing. I do wipe up
after every use, but more from neatness than absolute necessity.
I also wipe flung emulsion off the ceiling and back wall, so it won't
stain those surfaces too badly.
I used to use Cool Mist, and had endless trouble with rusting. This is
one reason I went to emulsion.
It does matter what kind of soluble oil one uses. The dilution also
matters. I use Rustlick WS-5050, at about 20:1. The dilution is chosen
so the fluid isn't too thick to spray. Given the low consumption of a
HSM, there is no point in trying to save money on emulsion. I will get
visible dark marks on the ways if some emulsion is left under the
carriage for a few days, but no rust. Way oil also helps to prevent
I have not tried mixing antifreeze and soluble oil, as the lathe is in
my basement, and does not freeze. But I would venture a guess that not
all combinations of soluble oil and antifreeze work. This might be
worth a phone call to the oil maker, as this cannot be the first time
the question has come up.
Not likely, if the coolant contains rust inhibitors as most do and you
have mixed it properly.
I repair machinery for a living, and find that rust problems develop
when the employees dump 5 gallons of water in the tank when it gets
low..again and again without using a proper refractometer to check the
water/coolant mix. Pretty soon they are running water with a slight blue
You will be fine.
"First Law of Leftist Debate
The more you present a leftist with factual evidence
that is counter to his preconceived world view and the
more difficult it becomes for him to refute it without
losing face the chance of him calling you a racist, bigot,
homophobe approaches infinity.
This is despite the thread you are in having not mentioned
race or sexual preference in any way that is relevant to
the subject." Grey Ghost
Off the ceiling...
Yes, I actually agree that "mist" puts too much water in the air, and
makes everything else dirty.
I was also thinking about making a chip guard to go around the axis of
rotation, to be mounts on the carriage.
What I like about my soluble oil, is that 1) it does not separate in
at least several months year and 2) it does not stink. I filled a test
jar with it when I prepared some for my cold saw, and kept it closed
for that period, opened it yesterday and found it in perfect
condition, even smelling kind of nicely.
I will give them a call, good idea, they are 20 miles from me.