Marcrist PG750X ‘Duo’ Dry Diamond Tile Drill

The Marcrist PG750X Duo dry diamond tile drill is one of those bits you wonder how you managed without. Two drill sizes in a single bit — 6mm at one end, 8mm at the other — so you’re not rummaging through a cluttered toolbag every time the job changes. More usefully, it drills completely dry, which means no spray bottles, no wet floors, and no faffing around with water cooling rigs mid-job.

Dry drilling porcelain used to feel like a compromise. Either you accepted the mess of water cooling or you burned through bits at an alarming rate. The PG750X changes that. The wax core inside the barrel acts as a built-in lubricant, keeping the cutting edge cool without any water at all. The result is a bit that stays sharp longer, cuts faster than you’d expect, and doesn’t leave a puddle on your freshly laid floor. Small mercies.

What the Marcrist PG750X Duo Is Capable Of

Marcrist quote 30 to 70 holes in grade 5 porcelain per bit, and that range reflects how much technique matters with dry diamond drilling. Keep the speed between 1800 and 3000 rpm, let the bit do the work rather than leaning on it, and you’ll comfortably hit the upper end of that figure. Rush it, or push too hard, and you’ll be at the lower end. The bit is self-sharpening as well as self-cooling, so consistent light pressure is always the right call.

It runs in both mains and cordless drills, which makes it practical for the full range of tiling jobs — bathrooms, kitchens, floor tiles, wall tiles, porcelain slabs. No speed controller required provided your drill has a variable speed setting, which most do.

Double-Ended Design and Value

The Duo format genuinely saves money. Rather than buying separate 6mm and 8mm bits, you get both in a single unit at a price that makes sense for trade use. When one end wears out, flip it. It’s a sensible bit of engineering that reduces the number of bits you need to carry and keeps costs down without cutting corners on quality. Marcrist also produce the PG750X in a full range of sizes from 6mm up to 14mm, so if you need other diameters the range has you covered.

For anyone drilling porcelain regularly, the Marcrist PG750X Duo is a straightforward, practical choice.