Masonry core drilling involves drill bits with notched teeth covered with carbide or industrial artificial diamond grit. These bits cut neatly into hard surfaces like concrete and stone and bring out a core of debris, and the resulting duct is used to run cables, lay pipes, or install extraction fans. They cut through virtually anything, allowing the user to put holes wherever they're most needed without causing any extra damage to the structure's surface. This guide is written to help shoppers pick the right masonry core drill for their home and workshop requirements.
Wet or dry drilling
Masonry core drills can generate a large amount of heat. Traditional core drill bits require that running water be present to carry the heat away--this isn’t always practical, of course. Some applications can become downright tricky when wet, such as cutting tile. Dry drill bits are more suitable for those, as they use cooling wax or lubricants to dissipate the heat instead. Dry bits are convenient when the worker wishes to skip the cleaning-up process that accompanies wet drilling. The only downside is that dry drilling tends to wear down the drill bit faster.
Purposes and measurements
The dimensions of the drill bit selected depend on what the worker intends to use it for. ⅜” bits are suitable for putting holes in tiles for screws to go through while drilling a hole in a granite countertop (as might be required for a vessel sink or faucets) requires a much larger bit, such as 4”. Other sundry applications, such as putting holes through walls, drilling into brick pavers, or other custom work, may need drill bits more suited to those individual applications. As they tend to cut very precisely, the worker can buy the exact size they need for the job--diamond grit cuts through nearly anything.
The length of the drill bit affects how long it takes to drill a hole. A short drill bit can only core out so much material as will fit, meaning it might take multiple passes if the hole needed is longer than the drill’s length. This may be difficult and inconvenient if the worker uses a wet drill bit, as slurry removal also has to be managed alongside drilling. A drill bit of sufficient length can simplify the entire process, letting workers finish drilling the full required depth in one go.
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