Cut concrete blocks with a diamond blade sized to the block: score all four faces with a 230–350mm blade on a masonry saw or angle grinder, then tap the block on a solid surface to break cleanly along the scored lines. For a straight full cut, use a wet masonry saw with a segmented or turbo blade and feed steadily.
For hollow and solid blocks up to 200mm thick, the score-and-break method is fastest:
This gives a surprisingly clean edge in seconds without a full-depth wet cut.
When you need a precision cut (for corners, openings or thin block), use a masonry saw:
For block and masonry work, the Concrete and Asphalt Saw Blade (HF Welded) is a cost-effective choice; the General Purpose Turbo Dry Blade handles on-site grinder cuts.
For score-and-break, a 230mm grinder blade is enough. For one-pass full cuts, you need a blade with depth of cut greater than 200mm — typically 500mm or larger.
Yes, with a dry-rated segmented blade. Take short passes and let the blade cool; wet cutting is cleaner and faster.
Usually from forcing the blade or cutting with too dull a rim. Score first, feed gently, and keep the blade sharp.
For 20cm blocks, score-and-break is the fastest clean method; use a wet masonry saw for precision full cuts. Match the blade to the block and feed gently for clean edges. JOY TECH's block-cutting blades come in grinder and masonry saw sizes.
