In article , William G Darby wrote:

I just bought ten gallons of ISO 10 hydraulic fluid to try as flood coolant.

I won't call you 'crazy', but I think you're taking a bit of a risk.
Hydraulic fluid is a lubricant, not a cutting oil.

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Mike Graham | Metalworker, rustic, part-time zealot.
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http://www.metalmangler.com| Caledon, Ontario, Canada