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5:48 PM
January 19, 2012
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Hi all,
I was wondering what kind of coolant is the best for my lathe and mill in my shop .My shop sees a lot of temperatures changes . i was thinking about a portable mist system . What kind of coolant is the best to prevent rust ? Im just a hobbyist
who likes to tinker . No production here ,Just making gadgets and projects i enjoy. Thanks
Jim
5:59 PM
February 10, 2011
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Hi Jim, welcome to the site.
An 'Aqueous' coolant is the most common for machining work, though to be honest it takes a lot of work to keep such things at bay on milling machines so maybe local application can be better for those, for hobbyists anyway. Basically it's difficult to control containment of the fluid on small milling machines.
I use Castrol Cooledge B1.
Btw misting is usually best done in closed cover machines.
7:30 PM
January 19, 2012
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I heard its not good to breath?
1:38 AM
January 9, 2009
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Someone correct me if I'm wrong, but I think that the risks of breathing coolant can come from a coolant that has had bacteria grow in it. I think most coolants themselves are relatively safe (and here's where I might be wrong) as long as measures are taken to prevent bacterial growth.
Aerosolized bacteria is never a good thing to inhale. Pneumonia and other lung-related issues can ensue.
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2:42 AM
February 10, 2011
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Decent coolants, like Castrol Cooledge, contains biocides to prevent bacterial growth, and a smart user will have a reservoir of adequate size rather than over sized so that the turn over of fresh coolant is there. However spray coolants are wholly different, totally safe to the operator, and very effective they are too. But where I've seen them in use overspray seems inevitable and errant mist is difficult to contain. But things have moved on since my time in the shop, and I know the systems were developing droplet control so that misting was minimised, I'll catch up on them and see what's about these days.
2:44 AM
February 10, 2011
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Hmm, well that was easy 
: http://www.fogbuster.com/index.html
11:34 AM
January 19, 2012
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I read your link. Is it the same as the one i was looking at called kool mist ? http://www.koolmist.com/portam…..t.html
The one i was looking at is the porta mist one . For what i do or what i will do i figured that would be ideal for me . I also understand what you said about keeping the coolant free of bacteria. A smaller container is easier to change an keep clean. Its not that i or any hobbiest like me have no reason for that big of a container anyways.
By the way how do i get a picture on my profile ? i dont see where you can upload one??
12:23 PM
February 10, 2011
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Click the word 'Profile' in the forum banner, then hit the 'select your avatar' tab, take it from there.
10:35 PM
April 27, 2011
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I have just recently noticed in my coolant tank that there are some "floaties" on the top of the coolant. I have got an oil based coolant, and I have taken them out so not to block up the pump system. My question is: Can these oil "floaties" contain bacteria in them or are they ok? Also , is it best to keep an eye on them not to get too much of them in the coolant?
Thanks in advance!
Mtw fdu.
9:08 AM
February 10, 2011
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I'd say no bacteria simply because it can't live in that stuff anyway, at least with oil emulsion based coolants it's just oils from lubing bedways or something like that coming to the top, as they are immiscible (good word 
) , I get it too as I lube beds a lot.
Your reservoir's pickup point for the coolant pump should be well below the minimum level, and above the bottom enough to clear sediment, this prevents the recycling of floating muck. I might occasionally lit this off by simply placing shop paper towel on the surface to wick it up. At least twice a year clean out the system entirely, and empty it if there's no plans to use it for a while. Dispose of coolants through an approved route.
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