Drilling Porcelain Stoneware: How to Do It and Which Bit to Use 2026

Drilling porcelain stoneware isn't difficult, but you need the right tools—like diamond sector bits for your standard angle grinder. Whether you're tackling a home improvement project or installing new fixtures, this guide will walk you through the process.

Drilling Porcelain Stoneware: The Right Tools Make All the Difference

Using a common angle grinder—a staple in any DIY toolkit—you can drill through even thick porcelain stoneware with diameters ranging from 20 to 70 mm. It's precise, fast, and straightforward, even on extremely hard materials.

The Killer Grès FT-S Montolit diamond bits are sector bits designed for dry drilling (also suitable for wet use). They work on all types of ceramic and porcelain stoneware, klinker, granite, and tile cutting.

These bits are ideal for drilling porcelain stoneware when installing bathroom vanities, plumbing fixtures, electrical systems, and pipe terminations. The Killer Grès bits offer long life, fast work speed on tiles, easy installation on power tools, and can be sharpened with the special sharpening stone (art. 395B).

Available diameters: 20, 27, 35, 40, 43, 50, 55, 60, 65, 70 mm. Prices start at €109.80 including VAT.

How to Drill Porcelain Stoneware

To mount the diamond bit on your angle grinder, remove the shaped washers normally used for fixing discs. The bit screws directly onto the shaft—diameter and thread are standard, so they're perfectly compatible.

If your grinder has a spindle lock button, press it to tighten the bit properly using a fork wrench.

Start the grinder, and once it's running at full speed, place the bit on the point you want to drill. Hold it at an angle so only part of the circumference touches the surface. Move the grinder in a rotary motion while keeping it tilted to proceed with the drilling.

Pro Tips for a Clean Hole

• Always start at an angle—never press flat—to prevent chipping.
• Use light, steady pressure; let the diamond do the work.
• For deeper holes, periodically lift the bit to clear dust and cool it down.
• If drilling near lighting fixtures or outlets, mark the spot carefully with a pencil.

What to Do After Drilling

Once the hole is complete, you can mount mirrors, install curtain rods, or run plumbing for your kitchen island. The precision of diamond bits ensures a professional finish every time.

Frequently Asked Questions

1. Can I use a regular drill bit for porcelain stoneware?

No, standard drill bits will quickly dull and may crack the tile. You need a diamond-coated or carbide-tipped bit designed for hard materials.

2. Do I need water for drilling?

Not necessarily. The Killer Grès bits work dry, but using water can extend bit life and reduce dust. If drilling dry, work in short bursts to avoid overheating.

3. What if my angle grinder doesn't have a spindle lock?

You can still tighten the bit using two wrenches—one on the bit shaft and one on the nut. Alternatively, consider upgrading to a model with a lock for easier use.

4. How do I avoid chipping the tile surface?

Always start at an angle and let the bit gradually straighten as it cuts. Use masking tape over the drilling point for extra protection, especially on glossy tiles.

5. Can I use these bits on granite or other stone?

Yes, diamond sector bits are suitable for granite, klinker, and other hard stone materials. They're a versatile addition to any garden supplies or workshop toolkit.

Related Projects

• Installing outdoor patio furniture on a tiled deck
• Mounting wall decor in a tiled bathroom
• Setting up outdoor lighting on stone walls
• Building a pergola with tiled bases

With the right technique and quality diamond bits, drilling porcelain stoneware becomes a simple, satisfying DIY task. Explore more tools and supplies at GrandGoldman.com for all your home and garden projects.

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