"John Stumbles" wrote
"David Moodie" wrote
having recently tiled the bathroom I'm now looking to drill a few hole in
the tiles.

the problem being that the tiles are approx. 9mm think and are
limestone/porcelain.

last time I had to drill porcelain tiles I think I just used my SDS.

My porcelain sink just laughed at my new Bosch SDS bit. I ended up
using (drill) mounted grinding stones to go through it.

Still took about 1/2 hour though (with stops to let bit & sink cool
down) to get through :-(

Cheers,

Paul.