A diamond cutting disc on an angle grinder is how brick, concrete, paving, stone, porcelain and ceramic tile get cut on a South African site. This collection covers Bosch Standard, EXPERT and Best diamond discs, Martlet segmented and continuous rim diamond discs, Dewalt 76mm blades for the DCS438 cut-off tool and Bosch bonded stone discs, from 76mm hand cutters to 450mm petrol cut-off saws.
Choosing a diamond cutting disc
- Rim type. Segmented rim cuts fastest and cools best in concrete, brick and stone. Continuous rim gives a chip-free edge on ceramic and porcelain tile. Turbo rim is the compromise for universal use across masonry and tile.
- Material grade. Bosch Standard for Concrete, for Stone, for Marble, for Ceramic and for Asphalt are each bonded for that material. Standard for Universal and EXPERT MultiMaterial cover mixed jobs where you cut brick, concrete and the odd piece of rebar.
- Diameter. 115mm and 125mm for small grinders, 180mm and 230mm for large grinders and the deep cuts in paving, 300mm to 450mm for table saws and petrol cut-off saws, and 76mm for the Dewalt and Bosch compact cutters.
- Budget versus life. Martlet 115mm and 230mm discs and the Bosch Eco line are priced for occasional use. Bosch Best and EXPERT discs cost more per disc and last many times longer in daily use.
- Bonded stone discs. For a quick cut in brick or block, the Bosch 115mm and 230mm stone discs are the low-cost consumable.
Concrete cutting disc or tile cutting disc?
Concrete and tile need opposite things from a blade: aggressive segments to clear concrete, a smooth continuous rim so porcelain does not chip. Buy the right disc for each rather than one for both. Pair the disc with a suitable angle grinder, a wall chaser for conduit slots or a tile cutter for straight tile cuts. For steel, see steel cutting discs, and for dressing the cut, grinding discs.
Diamond cutting discs are in stock in Cape Town with nationwide delivery, free on orders over R2000. For advice, call 021 674 2119.
