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qoncept 09-20-2012 11:58 AM

Drilling ceramic tile
Hoping someone can tell me what I did wrong here.. I used this drill bit on a porcelain tile last week as a test. I taped the surface, cooled it with water and drilled through it with no problem on my drill press.

Last night I started my job, got to the first hole and couldn't get the hole drilled without breaking tiles. (These are different tiles than I used on my test run, naturally :eek:) I could get about 1/8" through my 3/8" tile and get stuck. I tried flipping a couple over and still got about 1/8" before the bit would just stop cutting and start squeaking.

First things first, I'm going to slow the drill down when I try tonight. But is there anything else I should be doing differently?

Edit: Porcelain, not ceramic.

ktkelly 09-20-2012 01:16 PM

That's the wrong bit for porcelain tile.

Look for a diamond bit that's made for porcelain tile.

Lowe's #48295 is a cheap one that probably won't last long but would most likely get you through if you're not drilling a bunch of holes.

qoncept 09-20-2012 01:37 PM

Thanks, I thought I had the right thing. I need to make holes about an inch though, for copper pipes. Would I be better off using a dremel with a cutoff tool?

ktkelly 09-20-2012 04:56 PM

You should just get a larger version of that same diamond bit I mentioned. It's really a "core drill bit".

The 1 1/2" one I had was for drilling "dry" and it worked quite well fro me.

I used it in my drill press and used slow steady pressure. I do mean slow, as it'll build up a lot of heat. Push too hard or fast and the tile will break.

Ask me how I know...:laughing:

oh'mike 09-20-2012 06:07 PM

KTKELLY is right--a diamond hole saw is what's needed---and water---there are some useable ones at the Depot and places like that---they will come with a plastic stick on cup that acts as a guide and a water reservoir.

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