How to Drill a Hole in a Tile Corner Without Cracking It

Drilling a hole in a tile corner is one of the most nerve-wracking cuts in any tile job. You're close to an edge, the glaze is slick as glass, and the bit wants to skate everywhere but where you need it. One slip and you've got a cracked tile and a trip back to the store. The good news: with the right bit and the right technique, a clean corner hole comes down to two things. Low speed and light pressure. Here's exactly how to do it.

Why Tile Corners Are So Hard to Drill

The hard part isn't the tile body, it's the glaze. That glossy surface is fired hard and slick, and a spinning bit has nothing to grip. Out in the open field of a tile, a little wandering isn't a big deal. But near a corner or edge, you don't have room to spare. The bit walks, the tip catches the lip of the tile, and the stress fractures it right where it's weakest.

Beat the glaze first and the rest of the hole is easy. That's the whole game.

Break the Glaze First — Before the Drill Is Even On

Here's the step most people skip: you break the glaze before you start drilling, and you do it with the bit not spinning. Don't pull the trigger yet.

Rest the tip of the bit on your mark and rotate the bit slightly by hand, working with just the very point. You'll actually hear the glaze start to crack. That sound means you're scoring through the glossy layer and into the tile body underneath. That cracked spot becomes your anchor: a planted place for the bit to sit so it can't wander or skate toward the corner once you do power up.

Now Set the Drill to Low Speed and Pulse Through

With your starting spot scored, set the drill to low speed, and now you can start drilling. Keep it slow and pulse the bit: short on-off taps of the trigger rather than one continuous push. Pulsing clears the cut and keeps you from forcing the bit through the hardest part of the glaze all at once.

The most important thing here is to keep the pressure light. Let the bit do the work for you. Leaning on the drill doesn't make the hole faster. It makes the tile more likely to crack and dulls your bit. Easy hands win.

Once You're Through, Pick Up the Speed

The moment you feel the bit break through the glaze and into the body of the tile, you can increase your RPMs a little. The risky part is behind you. Keep that same light pressure and let the bit carry itself the rest of the way through. That combination, a touch more speed and still-gentle hands, gives you a clean hole without blowing out the back of the tile.

A Sharp Bit Does Half the Work

None of this works with a dull bit. A sharp tip is what lets you run light pressure and still cut. A worn bit forces you to push harder, which is exactly what cracks corners. You want to go into every hole with a sharp bit.

That's where the Bad Dog Multi-Purpose Drill Bits earn their keep. They're built to drill tile, masonry, metal, and more, and unlike most multi-material bits, they're easy to sharpen yourself. Pair them with the Bad Dog Diamond Drill Sharpener and you can put a fresh edge on your bit at the bench in seconds, so you're never starting a delicate corner cut with a tired tip.

Center-of-Tile Holes Are the Easy Cousin

Worth noting: everything above is for the tough case. If your hole lands in the center of the tile, away from any edge, you don't have to be nearly as careful. There's plenty of material around the hole to absorb the stress, so you can go in with medium RPMs and make holes nice and quick. Save the slow-and-light routine for the corners and edges where it counts.

Drill Tile Corners With Confidence

A cracked tile in the corner is almost always a speed-and-pressure problem, not a you problem. Go low, go light, break the glaze first, and keep a sharp bit in the chuck. That scary corner hole turns into a thirty-second job.

Bad Dog Tools has been making drill bits in the USA since 1988. Over 6 million of them. And every Bad Dog bit is backed by a lifetime guarantee. Family-owned for three generations. Less Bark, More Bite.

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