Cutting oil or coolant?
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  1. #1
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    Default Cutting oil or coolant?

    Does anybody have any neat tricks for cleaning cutting oil from parts?
    I just bought a couple CNC lathes coming out of a screw machine shop running straight coolant and am trying to decide whether to continue running them with cutting oil or to switch them to water soluble coolant like the rest of my machines.

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    We have two screw machines here. Everyone we talked to said to stay with cutting oil. As far as cleaning parts, we have a parts washer for stainless parts and the rest we just let drip-dry. Depending on what you're running smoke may be a problem. As far as cost, cutting oil is much more expensive but you don't lose as much as you do with water-soluble.

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    Continue running the oil. Its certainly not as convenient as water sol, but the machines will last forever. One downside is you will probably want to invest in a centrifugal chip wringer to recover the oil out of the chips. Even drip drying chips leaves a lot of oil behind.

  4. #4
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    You did said CNC Lathes...not screw machines right?

    Straight oil can ignite, fire is not a good thing.

    CNC lathes can run pretty hard, pulling off alot of hot chips. Oil does not do a very good job of cooling...its the water in the coolant that cools. Anyway, oil gets hotter and hotter, oil mist, white hot chips, carbide tool breaks down glowing red on cuts. Its all a potential to ignite the oil.

    If small parts or your not running hard...not much of an issue...but something to consider if otherwise.


    Removing oil...chip wringer, lots of drip pans and keep a ton of rags around as that oil gets everywhere fast.


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