How to choose the right disc for cutting and grinding tiles
I get asked this question more and more. As the portfolio of tiles and slabs expands, it's essential to choose the right cutting tool accordingly.
From my experience, there is no such thing as a "universal" disc for everything, even though some come close. In principle, every manufacturer and type of disc has different properties and a different lifespan. Today, there are many brands and discs on the market for cutting and grinding tiles.
Personally, I use a wide portfolio of brands and always test how a disc cuts into the material before starting any job. I primarily use brands such as Montolit, Distar, Sigma, DiaSegment, Pro5, and my own J&J Profi Series. Below, we’ll break down which ones are used for what.
Looking at Montolit, their discs are undoubtedly among the best on the market—both for straight cutting from the DNA series and for miter cuts (jolly) like the JollyMont. Their cutting properties are excellent regardless of the tile hardness. However, they sometimes struggle with very soft ceramics, where a dry cut can be a bit jagged.
Distar is probably the most well-known brand with a huge portfolio. I've tried almost everything, and I must say not everything is 100% perfect. For example, the Perfect disc cuts amazingly, but its properties slightly decline under high mechanical and thermal stress. On the other hand, the EdgeDry disc is a perfect tool for mitering. The series for mini grinders like Proxxon, such as Butterfly or MasterCUT, is also outstanding.
Sigma and Raimondi don't focus primarily on discs, but their tools for rail cutters (like Raimondi Raizor or Sigma KERA-FLEX) are top-notch and cut exactly as you'd expect from these legends.
The PRO5 brand has pleasantly surprised me. They match Distar and easily outperform brands like Bihui. They offer a great price/performance ratio. I use their hexa-segment discs in my slider and I'm very satisfied.
Crucial Advice: Every new disc needs to be "opened". No disc has its ideal properties straight out of the box until the diamond in the bond is exposed. I recommend running it through an abrasive material (sharpening), and even then, cutting a few meters before it "settles".
Don't forget about maintenance—discs aren't immortal. They need to be cleaned using an abrasive stone (10 to 15 slow cuts).
"If you want to be a pro and you cut every day, don't buy a disc based on how long it lasts, but on what it can do."
Watch out for cordless (battery) grinders. Most discs are built for 11,000+ RPM. Common cordless machines run at 8,500 – 9,500 RPM. The disc then lacks sufficient peripheral speed, overheats, and gets blunt (it "polishes" itself). If you work with batteries, get a grinder with 11,000 RPM or choose discs specifically designed for cordless machines.
| Cut Type / Purpose | Recommended Disc | Main Advantage |
|---|---|---|
| Miter cuts (45° Jolly) | Mr. Yoda FS (125mm) | Maximum stability, doesn't deflect, allows for grinding |
| Clean cut (wet) | Distar Shine | Minimal chipping, only 0.6 mm thick |
| Hard Gres (dry) | PRO5 JOLLY-EDGE | High cutting speed, reinforced center |
| Universal workhorse | Distar Esthete | Great price/performance ratio for straight cuts |
Hopefully, this article helped you understand how to choose the right disc 😊