For the drills with the oil feed holes parallel to the shank, which run from
one end of the drill to the other, is a different bushing made for every
diameter of drill? Also, is the oil fed under pressure? I was contemplating
settting up something to use oil-fed drills in the tailstock of my lathe.
I'm finding a lot of stuff about the drill bits themselves, but not much on
the equipment needed to run them. TIA.