Igor,

I've been using Hangsterfer S500 for a couple of years now and the first
batch is still odor free and I've never aerated it. It's sitting in a
bucket, gradually evaporating the water off before disposal. I use it at
5% - I can give you a sample if you need enough to make up 5-gal or so of
diluted coolant. The stuff costs around $125 for 5 gallons so it's a good
idea to make sure you like it before you buy.

Mike

"Ignoramus31261" wrote in message
...
On 2009-05-09, spaco wrote:
Can't you get synthetic coolant for that and avoid the problem all
together? When I set up my surface grinder several years ago, I went
to an industrial lubricant and solvent company and they sold me some
stuff that never goes "bad". It cost $135 for a 5 gallon pail 10 or 15
years ago) and I dilute it 32:1, using a 15 gallon tank.

I will call some places to find out where I can buy it. It would be
great indeed.

i

My brother worked at Gardner Machine for many years and he used to tell
about how bad the place smelled every Monday morning, and I didn't want
that in my shop.

Pete Stanaitis
-----------------

Ignoramus31261 wrote:
Due neglect and mismanagement, the coolant in my lathe finally went
bad after several months in the sump. I have to add here that I have
all ingredients for setting up both the skimmer, as well as aerator,
to run on two timers, something that I plan on doing soon. But as of
now, I want to make sure that I properly remove old coolant.

As far as I understand, I should try to really get rid of the harmful
bacterias that live in the present coolant. I have a easy to use water
pump that I can use for this purpose.

So my plan was, pump out the coolant, rince the sump a couple of times
with just hot water with some Simple Green, then put water with bleach
for an hour, and rinse some more. Would that seem to be a good plan?

i