Masonry Saws 500 - 1000 mm

A hollow block saw blade has teeth or segments made from sintered carbide (widia) or diamond, matched to grinding through ceramic, calcium silicate or aerated concrete — materials with high silica content that quickly blunt blades meant for wood or high-speed steel blades for metal. A wood blade chips the block's edges, while a metal blade overheats and can crack under load. A 500–1000 mm blade runs at 1500–3000 rpm on a table saw and withstands abrasive ceramic dust through hundreds of cuts.

Blade size is matched to the wall thickness of the block, because cutting depth is roughly half the blade diameter minus the mounting flange. A 500 mm blade cuts blocks up to about 180–200 mm (18–20 cm blocks), 600–630 mm handles roughly 220–250 mm (24–25 cm blocks), and 800–1000 mm gives a reach of up to 380–400 mm — large-format blocks and 36–44 cm walls. Always check the maximum diameter your table saw allows, since an oversized blade won't fit under the guard.

NORWIT.PL's range is dominated by Norton Clipper and Dr. Schulze blades and discs, complemented by carbide blades from our own Norwit brand at a more accessible price. Norton Clipper covers 500–1000 mm sizes in both carbide and diamond versions, while Dr. Schulze specialises in discs for harder and reinforced materials. Brand choice depends on the material being cut (Porotherm, Ytong, Silka) and how often the saw runs — daily site use favours professional-grade blades.

A universal carbide blade for ceramic will handle Porotherm and similar hollow blocks, but aerated concrete (Ytong) and calcium silicate (Silka) have a different structure and hardness, which is why manufacturers offer separate tooth patterns for each. Aerated concrete is soft and porous and needs a sharper, wider-set tooth to avoid chipping the edges, while calcium silicate is dense and abrasive, like sandstone, and needs a harder carbide tip. Cutting both materials with one blade is possible, but at high volume, matching the blade to the material extends its working life.

A carbide blade has teeth tipped with tungsten-cobalt sintered carbide that cut the material mechanically — it works well for ceramic and calcium silicate hollow blocks, costs less and lasts hundreds of cuts under moderate load. A diamond disc grinds the material with diamond grit bonded onto peripheral segments, lasting many times longer on reinforced or particularly hard blocks, but at a higher price. For mixed materials, a 500–1000 mm diamond disc pays off through a lower cost per metre cut.

500–1000 mm blades and discs are mounted in table saws for construction materials — stationary machines with a table and blade guard built for large diameters, not in handheld angle grinders, which take a maximum of roughly 230–350 mm. Before buying, check the maximum blade diameter, the mounting bore (most commonly 30 or 25.4 mm) and the spindle speed, usually 1500–3000 rpm, so the blade runs safely and fits under the guard.

Carbide blades for ceramic and calcium silicate hollow blocks typically run dry — dust is extracted through the guard and a dust collector, and water cooling isn't necessary for standard 500–1000 mm cutting. Diamond discs for harder materials benefit from water cooling, which can extend segment life by several tens of percent and cuts down on dust. The choice depends on the table saw model — some machines have a built-in spray system, others need an additional water tank.

Carbide blades for ceramic hollow blocks typically carry anywhere from a dozen or so up to around 24 teeth at 500–1000 mm diameters — fewer teeth give a faster cut with less dust clogging, while a denser pattern above 20 teeth gives a cleaner edge on thinner walls. A medium tooth count works well for Porotherm, balancing speed and edge quality, while calcium silicate blocks favour a sparser pattern that resists blunting in dense material.