Porcelain used for sink construction is considered a masonry material. You need to use an electric drill equipped with masonry bits to drill into the porcelain. Masonry bits are available in a variety of materials, including carbide, high-speed steel or diamond plating; different materials produce slight bit tip variances. To make large plumbing fixture holes, use a masonry hole saw. A masonry hole saw is a hollow cylinder attachment with cutting teeth that slides over a drill bit and is secured to the back shank using a bolt. The secured bit is centred in the boring tool and is used to pilot the masonry hole saw for a precise cut.
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Things you need
- Electric drill
- Masonry bits
- Masonry hole saw
Determine where you will make a hole in the sink by using a pointed marker to indicate a centre mark.
Attach the masonry bit to the electric drill. If you plan to bore a larger hole later in the process, use a masonry bit that is the same size as the masonry hole saw's piloting bit. When the masonry hole saw is attached to the drill, its teeth will create a larger hole than a typical drill bit.
Drill the hole where the centre mark is indicated. This will be the last step if you are making only small holes. If you plan to bore larger holes, this will serve as the pilot hole for the masonry hole saw.
Install the masonry saw to the end of the electric drill. Either slip the cylinder attachment over the current bit shank being used, or remove the drill bit and attach the entire masonry hole saw unit.
Insert the centre bit of the masonry hole saw into the pilot hole and let the saw teeth rest against the porcelain. Slowly squeeze the drill's trigger to allow the hole saw to gradually come to full speed. This will help prevent tool binding or jumping, which can cause damage to the porcelain.
Hold the drill at a 90-degree angle to the sink to create an even hole. Apply slight pressure to the rear of the drill to allow the teeth to cut into the porcelain. Do not push on the bit forcefully because this could crack the porcelain.
Tips and warnings
- Wear personal protective equipment, such as safety goggles and ear plugs, when using power tools.
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