While tiling a bathroom I ran into problems when I had to cut holes in new tiles for the tub and shower valves. I couldn’t use my nippers to nibble away the tiles because each hole landed near the center of a tile. Instead, I used a 1-3/8-in. dia. hole saw — the kind normally used to cut holes in wood.
After laying out the centers of the holes on the backs of the tiles, I used my 1/4-in. carbide-tipped masonry bit to drill pilot holes in each tile. Then 1 put the tiles face down on a block of wood, and used the hole saw to finish the job. The wood block reduced chipping on the glazed face of the tile and gave the pilot bit something to bite into. I must admit, this operation dulled the hole saw beyond resharpening. But at less than $5, it was worth it.
Paul M. Dandini, Boston, MA