Diamond Blades for Asphalt Cutting

A gas-powered or electric cut-off saw fitted with a diamond blade rated for asphalt or multi-material use is the standard tool for cutting asphalt. For larger jobs, walk-behind saws with larger diameter diamond blades (18"-24") provide deeper cuts and faster production rates.

Many diamond blades are rated for both concrete and asphalt, but a dedicated multi-purpose or asphalt-specific blade with undercut protection will last longer and cut faster, since asphalt's abrasive aggregate wears standard concrete blades more quickly.

Blade size depends on cutting depth required. Handheld saws typically use 12"-16" blades for depths up to 5 inches, while walk-behind saws use 18"-24" blades for deeper cuts through asphalt overlays and base material in road repair projects.

Blade life varies with asphalt aggregate hardness, cutting speed, and whether the blade is run wet or dry, but laser-welded blades with undercut protection and higher segment counts typically outlast standard blades by resisting core wear and segment loss.

Wet cutting reduces dust and heat, extending blade life and improving cut quality, but dry cutting is more practical for road repair where water access is limited. Blades rated for both wet and dry use give contractors flexibility on any jobsite.

Most asphalt diamond blades use a 1"-20MM or 20MM arbor, which fits standard handheld and walk-behind saws. Always confirm your saw's arbor specification before ordering to ensure a proper, safe fit.