Originally Posted by Brewpastor
Who knows the best way to cut/drill holes in slate? I need 5 holes for my faucet shanks and really don't want to crack this thing!
You want a masonry coring bit. You could probably rent one too at the DIY. If you have access to a drill press and the slate dimensions allow, that is the beest route since it affords even pressure. You need a steady flow of water to keep a slurry going and keep everything cool.
I have done this type of coring before, through concrete slab floors where cracks are a "no no". The righ that we used was bolted into the floor, and the coring bit was then pressed into the concrete. the drill has a water hose attachment, and dispensed the water. The coring bit is just like a hole saw bit, except that it does not have teeth. It has an edge that is usually industrial diamond, with even slots around the circumference, so allow removal of the debris, which then forms the slurry. it is slow coring, but very precise, and leave an opening that would be finish grade.
EDIT***similiar to this