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  1. #13
    Gold Member handlewanker's Avatar
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    Default Re: Stinky Coolant

    Hi Mac.....back in the 50's and 60's we DID use Drano or it's trade equivalent to kill the bacteria.....it was sold specifically for cleaning the muck you get from a smelly drain and also it cleaned the machine sump.......it's mainly a bacteria thing that's causing the problem.

    While I quite agree that modern coolants like the pale green synthetic stuff that cost a bit and do work well and seem to not have the bacteria problem of the soluble oil coolant, at the same time if the machine is not cleaned out thoroughly you will get some stink as the residue contaminates the new stuff.

    BTW.....no machine we used Drano on ever got damaged.....whether or not it was a good idea I have no clue, but it did cure the problem without noticeable side effects.
    Ian.



  2. #14
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    Default Re: Stinky Coolant

    Quote Originally Posted by Jon.N.CNC View Post
    I must have been half asleep when I commented on this this morning, I was referring to cooling water not cutting fluid. Lol I agree spraying antifreeze not a good idea.
    Hi......yes. it did seem a bit drastic......the antifreeze might strip the paint off too, apart from leaching the lubricants out of the slideways.

    It most probably would be necessary....in the spindle cooling water...... if the climate was cold enough for snow and the workshop wasn't heated overnight.....we don't have that problem in Melbourne....TTL

    In one workshop back in UK we once had to do a morning chore with a blowlamp to thaw out the toilet cistern before having a crap....it was in an outside washroom and regularly froze up overnight in Winter......one crapper for 50 blokes......after that....by "royal" decree.... we made sure the cistern was drained down at the end of the day.
    Ian.



  3. #15
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    Default Re: Stinky Coolant

    Quote Originally Posted by handlewanker View Post
    Hi Mac.....back in the 50's and 60's we DID use Drano or it's trade equivalent to kill the bacteria.....it was sold specifically for cleaning the muck you get from a smelly drain and also it cleaned the machine sump.......it's mainly a bacteria thing that's causing the problem.

    While I quite agree that modern coolants like the pale green synthetic stuff that cost a bit and do work well and seem to not have the bacteria problem of the soluble oil coolant, at the same time if the machine is not cleaned out thoroughly you will get some stink as the residue contaminates the new stuff.

    BTW.....no machine we used Drano on ever got damaged.....whether or not it was a good idea I have no clue, but it did cure the problem without noticeable side effects.
    Ian.
    The Drano in the USA is made up of Hydrochloric Acid, you don't want this stuff anywhere near your machine, this is used to strip anodizing from aluminum

    The pale green synthetic coolant your are talking about, you don't want to go there I used to sell it, it's a good cutting fluid, it's main content is glycol, your machine and tooling, will rust really bad if you use this product, no matter how much of there antirust you add, it still will rust your machine and tooling

    Mactec54


  4. #16
    Gold Member handlewanker's Avatar
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    Default Re: Stinky Coolant

    Yikes!!!.....hydro chloric bad stuff.......definitely don't want to mess with that.

    The brand name Drano I mentioned is probably the stuff I heard of on here somewhere.......the brand name back in South Africa escapes me, but it's sold in shops in a brown bottle to clean out drains and goes milky when added to water....also has a carbolic smell to it.

    About the pale green coolant.........if it' rusts the machine parts like you say, that's bad news..... strange, because we used it, or something like it on our grinders and also a mill without problems.........I have a link on my favourites list for some stuff that is sold in Canada and costs about US$25 a litre.....I'll have to look up our local lube dealer to see if they sell something like it too.

    It's academic really, as I won't be using flood cooling or have a sump on my mill, so no mass storage to worry about.......I'll be using something that, if I can find it, will be stored in a container for mist cooling and will probably, after wipe down, evaporate from the machine surfaces over time.

    Here's a pic of the stuff sold in Canada called GREENCUT MISTING/CUTTING FLUID.
    Ian.

    Attached Thumbnails Attached Thumbnails Stinky Coolant-greencut-cutout-170x238-new-png  


  5. #17
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    Default Re: Stinky Coolant

    Quote Originally Posted by handlewanker View Post
    Yikes!!!.....hydro chloric bad stuff.......definitely don't want to mess with that.

    The brand name Drano I mentioned is probably the stuff I heard of on here somewhere.......the brand name back in South Africa escapes me, but it's sold in shops in a brown bottle to clean out drains and goes milky when added to water....also has a carbolic smell to it.

    About the pale green coolant.........if it' rusts the machine parts like you say, that's bad news..... strange, because we used it, or something like it on our grinders and also a mill without problems.........I have a link on my favourites list for some stuff that is sold in Canada and costs about US$25 a litre.....I'll have to look up our local lube dealer to see if they sell something like it too.

    It's academic really, as I won't be using flood cooling or have a sump on my mill, so no mass storage to worry about.......I'll be using something that, if I can find it, will be stored in a container for mist cooling and will probably, after wipe down, evaporate from the machine surfaces over time.

    Here's a pic of the stuff sold in Canada called GREENCUT MISTING/CUTTING FLUID.
    Ian.
    That's the stuff I was selling, as a cutting fluid it works well, but is not good for your machine or your tooling, I ran it for 2 years myself, just got sick of there the BS from the manufacture as to why everything would get nasty rust on it, they said that this was the cutting fluid doing it's job, and was cleaning the pores in the metal, total BS

    I can assure you the stuff you where using was not this Green Cut, this has not been around that long

    Mactec54


  6. #18
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    Default Re: Stinky Coolant

    Hi Mac.....thanks for the heads up on that stuff.....one thing's for sure, we didn't have a rust problem or any problem related......I'm going to check with our local supplier to see what they have......at any rate I'll only need a small amount as I'll be using it in a mist cooling application.....a litre at 20:1 dilution rate would last me forever.

    Some time ago I did some repair work for a guy who had an iron mongery business and one thing he had was a small centrifuge......he stocked them and sold them all over the World for small time milk processing in Africa and India etc.

    In the course of discussing it's merits from separating cream from milk etc, he also said you can emulsify oil and water to make a mix for some purpose........now that is quite interesting as oil and water is a coolant and it doesn't need something to chemically break down the oil to make it emulsify......I'll have to investigate that process as it was 30 years ago I last came across it.
    Ian.



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    Default Re: Stinky Coolant

    Quote Originally Posted by handlewanker View Post
    Hi Mac.....thanks for the heads up on that stuff.....one thing's for sure, we didn't have a rust problem or any problem related......I'm going to check with our local supplier to see what they have......at any rate I'll only need a small amount as I'll be using it in a mist cooling application.....a litre at 20:1 dilution rate would last me forever.

    Some time ago I did some repair work for a guy who had an iron mongery business and one thing he had was a small centrifuge......he stocked them and sold them all over the World for small time milk processing in Africa and India etc.

    In the course of discussing it's merits from separating cream from milk etc, he also said you can emulsify oil and water to make a mix for some purpose........now that is quite interesting as oil and water is a coolant and it doesn't need something to chemically break down the oil to make it emulsify......I'll have to investigate that process as it was 30 years ago I last came across it.
    Ian.
    You didn't see a Rust problem because they weren't using Green Cut, I was the second distributor in the USA, so when you saw the cutting fluid in use, Green Cut was not even in Australia and may not even be there now, in great use, there was a company in NZ that was using it for there CNC Plasma cutting quench around 5 years ago, CNC Plasma cutting is where it has been mostly used

    You want the least amount of oil, they don't use regular oil in making cutting fluid, it's the oil that attracts and grows the bacteria, 30 years ago why are you even talking about it, cutting fluid has changed so much 30 years, you need to catch up

    Mactec54


  8. #20
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    Default Re: Stinky Coolant

    Hi...the green coolant I'm familiar with was used in the 60's when I was working in South Africa, mostly on the grinders, but I also came across it in UK in the mid 70's, so it's around in different forms I think.

    I mentioned the centrifuge as the guy who had them stated that ANY oil can be emulsifi3ed with water without chemical additives.......mineral oils interest me specifically as they're not of vegetable origin so bacteria probably wouldn't live on them.....they don't live in my car's engine oil..... although mineral oils are derived from plant juice from ancient forests millions of years ago, so the mineral title is a mystery to me.

    It's only academic really as I won't be making any home brew just because........a litre or two of the real stuff mixed with water would last me for years.
    Ian.



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    Default Re: Stinky Coolant

    Tramp oil is the biggest reason for stinky coolant. It's like covering up a dog turd with a plastic bag. That's why bubblers work, it breaks the surface tension. The other main reason I see coolant go bad is from how it's mixed, or not for that matter. Adding straight water is one of the biggest issues, you always want some mix, for the biocide in any half modern coolant. Another issue is how the coolant is mixed, always add concentrate to water, not water to the concentrate. Adding water to concentrate can cook off the biocide,, and can cause that jelly like separation.

    Sent from my A3-A20FHD using Tapatalk



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    Default Re: Stinky Coolant

    Back to Waynec44's original question:
    For sure, coolants can get contaminated by bacteria. The bacteria loves the coolant, as the ingredients make great food. My shop has a weekly monitoring schedule. We'd test the ph, the concentration, and check for bacteria. We test on Fridays, read the results on Monday and treat the coolant with an anti-bacterial coolant additive if needed. This eliminates the stench that bacteria create and so keps the guys happy and free of skin rashes. We used Bug Check BF kits to test for bacteria. Manufacturer is Avalon Int'l. Corp.



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    Default Re: Stinky Coolant

    Only coolant I've ever likes is blaser swisslube. Good stuff.

    One shop I worked in the owner bought this cheap Chinese stuff. It was gross. When the water evaporated over the weekend it turned to a solid clump. Almost like a big block of Crisco.

    Sent from my SM-G930W8 using Tapatalk



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