Re: Coolant control.

Hi Fitch,

I think you guys are making way too big a deal of the rust and
corroding effects of water based cutting fluids. Don't forget
they're used day in and day out on very, very high dollar machines.

I agree they will sometimes leave a brownish stain under vises and
fixtures, but it's usually not a major issue.

As to your use of hydraulic fluid/mineral spirits brew....why?
Doesn't that have tendency to wash the way lubricant off? Seems like
it would act somewhat as a solvent rather than cutting agent. If you
want to use a straight oil, why not an oil formulated with extreme
pressure additives designed for cutting? They come in all sorts of
varieties from high sulfur, clothes-staining browns to odorless,
clear. Of couse, they cost more than your brew, but would be
dramatically better.

thanks,

Doug

--- In CAD_CAM_EDM_DRO@y..., Fitch R. Williams <frwillia@p...> wrote:
>
> Well, this could be another whole kettle of fish, but I'm not using
> water based coolant. The stuff drives me nuts. Instead I use 19.95
> universal hydraulic fluid cut with mineral spirits enough to make it
> flow more easily. More oil, less spirits in summer. It isn't as
good
> as the water based stuff, but it sure won't rust or corrode the
> machine.
>
> I use pure cutting oil on the lathe - but just for threading,
> knurling, parting, and drilling. Turning is done dry 99% of the
time.
>
> Fitch
> In So. Cal.