Plumbing a water-cooled spindle.

[Kitwn]

Thanks cropwell,
I went water cooled partly because of the high ambient temperatures here (Exmouth, WA) and also the noise. My previous spindle was a Chinese clone of a Makita trimmer/router which screamed the place down as soon as it started and burnt out due to overheating. The new spindle makes as much noise as the pond pump before it starts cutting.

I was a bit surprised by what the salesmant at Auto-Pro said about anti-freeze but I know he's no idiot and thought a few other opinions would be worth getting.

Kit

[cropwell]

Here matey. have a look at this - https://en.wikipedia.org/wiki/Antifreeze

[Kitwn]

Here matey. have a look at this - https://en.wikipedia.org/wiki/Antifreeze

Reminds me of Time Team..."'ere Tony, come and 'ave a look at this!"

Now I'm even more confused, but it shows there's more to this than pouring in some green stuff.

Kit

[cropwell]

Now I'm even more confused, but it shows there's more to this than pouring in some green stuff.

Kit

Good grief man, you can't use the green stuff, Gotta be blue or red G13 at least. Failing that, how about VW Beetle antifreeze

Personally, I gave it up when they stopped the methanol based stuff.

Cheers !

Rob-T

[Kitwn]

Well it used to be green! That's only the fluorescein dye anyway. I Think the last time I actually bought anti-freeze in a shop Mrs Thatcher was still PM. I'd had enough of grovelling about under cars at the side of the road by then and vowed that as soon as I could afford it I was going to pay someone else to service my car. I would, of course, now purchase the latest safety approved product from a reputable Australian supplier.

Kit

[magicniner]

Any good quality Ethylene Glycol based anti-freeze has corrosion inhibitors which will work well in a system which includes Iron, Steel, Aluminium, and/or Brass, use De-Ionised water too to avoid any chance of impurities building up inside the spindle.

[Kitwn]

I'm afraid Ethylene Glycol is out due the risk of poisoning the dogs if I get a leak and they lick it up. I'm tempted but my wife would never forgive me! The Proylene Glycol version is OK so I'm going to head for our local Auto-Pro and read the labels very carefully.

I obviously don't need the anti-freeze/anti-boiling properties of the stuff but some corosion inhibiters might be nice. I am also concerned about algae growing in the water. It doesn't get hot enough to kill the stuff but the ambient temperture here is perfect for it. If I don't find a suitable anti-freeze I might just go for adding a little chlorine based bleach (NOT the 'oxygen' stuff). A little further reading on Wikipedia sugests that a weak solution of 200ppm Sodium Hypochlorite will be strong enough for bug killing but won't attack the metals. Standard household bleach is about 5% (50,000ppm) so a couple of tablespoons of bleach in 10l of distilled water should do the trick.

Thanks for all the comments from everyone so far, this has prompted some interesting reading.

Kit