mick7

Thanks for reply.

When you say start off with a dry drill, do you mean one with just a normal tile bit? On ceramics I normally just use a bit of masking tape and masonary drills just fly though them. I am using the drill at a moderate speed, not too slow as it would take all day, also use a fair bit of pressure. My hand drill is new so thats not the problem.
It has done the job,very hard work, I'm just not looking fwd to doing any more. 4 holes per bit?