You said it - mercury will exit the hole - taking heat with it since it
conducts. It creates a vacuum and draws in other. Something like a heat pump.

When I drill or hold cut glass on the drill press, I build a dam of clay and
fill it with water. Steam blows water out of the hole, but the exhaust on one
side draws in fluid on the other. The cut is done cooler. Doesn't shatter
the glass.

Martin

Martin H. Eastburn
@ home at Lions' Lair with our computer lionslair at consolidated dot net
TSRA, Endowed; NRA LOH & Patron Member, Golden Eagle, Patriot's Medal.
NRA Second Amendment Task Force Charter Founder
IHMSA and NRA Metallic Silhouette maker & member.
http://lufkinced.com/


Joe AutoDrill wrote:
UGH. Mercury is the coolant - a metal liquid. Likely very active.

Not the case. Secondary discussions indicate that the mercury will exit the
hole I drill, not be sprayed onto the surface as I drill...