It’s very low viscosity, which means low drag (it won’t spray much from the bit like heavier oils) and it has good thermal and lubricant properties.
I drilled through the bottom of an aquarium with a hand drill and a parabola-shaped Silicon Carbide grinding point. I went slow, and used water as coolant. Worked great.
I’d amend that to the full face shield and the plastic glasses underneath, instead of the And/OR. Your eyesight is critical, but once thats protected its time to think about facial lacerations from flying glass.
Declan
'Cause that’s what my grandma advised … and likely because we had kerosene for the lamps, but no light mineral oil.
w.
PS - and of course what Q.E.D. said.
I do stained glass. I have an attatchment on my grinder to drill holes. I have also done it with a diamond tip on a Dremel tool. Be sure to have it under running water, or the heat generated will break the glass.
Just like I posted in post #2 - we used petroleum jelly because it was room temp and the glass never broke…water could make it too cold and the heat/cold difference tended to break the glass.
I actually just did this recently. I heated up a beer bottle with a Mapp gas torch and made a whole in it with a flower stem (becuase that’s what was near me). This wouldn’t work for the OP though as the it wasn’t a clean whole, it’s was more like a one inch cirumference divit about one inch deep with a whole in the middle. It’s looked more like a funnel.