On 2010-11-23, Steve B wrote:


Are you guys talking about TIG coolant? I am not familiar with a "sump".

Steve

No, cutting fluid for the milling machine. It is a "milk" made of
water and concentrate that prevents rust, cools cutting bits,
lubricates the point of cutting. The "sump" is a tub in the bottom
of the mill where the fluid collects. It also is a point where tramp
way oil collects, which causes problems with lack of oxygen and
anaerobic bacteria.

http://en.wikipedia.org/wiki/Cutting_fluid