What this isn't:
Everyone does things a bit different. By no means is this an attack on people who like to do things on the cheap. Sometimes it works, but never as good as doing it in the correct manner. Below, is more or less a system for people who would like commercial quality AND longevity out of there cooling system, and don't mind spending <$200 (roughly) dollars on the entire setup. Once again, for people that are cheap, or love the inexpensive route, please don't read further. Also don't bother telling everyone how you hooked up a garbage can with 2 tubes and used a pond pump. I'm glad it works for you, but some people want a bit better option than a pond pump and a barrel, especially when the machine they own, costs thousands or tens of thousands of dollars. Is this the only quality solution? Obviously not, but its a damn good one.
Lets see since its a aluminum water jacket, make sure not to introduce copper into the system or you will get galvanic corrosion, with water being the transfer medium. If you are A-ok in that department, use "PROPER" liquid AND tubing that is made for thermal heat transfer AND resists (or eliminates in some cases) the chance of microbial build up.
For the quick job here and there distilled water works fine, if you plan on flushing and cleaning a lot (depending on the use of the machine, "I" would flush at least once a month) The warm dark spindle cavity is the perfect petri dish for bacterial growth to form. (Also PVC tubing is horrid from Home Depot).
For those of you who do something, oh what's it called... oh yes, its called the "correct way". Look at what Tygon (tubing manufacture) has to offer in its silver lined anti-microbial tubing. Its the best out there, i believe 3M makes something alike which would also work. That is only half the battle! The fluid needs to transfer heat, as well as resist clogging, clotting and microbial build up, and offer something just in case it leaks, like having a very low electrical conductivity. For probably less than $100 dollars easily (for tubing and coolant), if not $50 dollars you can really save yourself a MONSTER headache, and a lot of unnecessary maintenance, which in turn is wasted time=wasted money. (I have also included a small radiator, and a water pump which is way better than those throw away junk pond pumps. This setup could go 24/7 no worries for more than a year at least, is my prediction.) So anyone looking at a more commercial application that you don't have to baby sit, and is not ghetto check it out.
Fluid:
http://fluidxp.com/index.php?option=...d=26&Itemid=65
Tubing:
http://www.tygon.com/tygon-antimicrobial-tubing.aspx
Radiator:
http://www.newegg.com/Product/Produc...82E16835108086
Pump:
http://www.newegg.com/Product/Produc...82E16835108063
The pump and fan can be powered with almost any 12V wall wart power supply that meets the power requirements. If you have the space, almost the entire cooling unit can be mounted above the spindle. It takes up a very small foot print. If you plan on running the machine commercially i would look into a micro atx power supply instead of a wall wart.
I hope this will help the few people who really like quality, i have literally used 100's of Laing pumps and gallon after gallon of the coolant, cases of radiators, and yards of that tubing so i can highly vouch for all the products. This is how i plan on cooling my spindle, so hopefully i can produce some slick pictures soon.
Thank you for your time.