General Purpose Diamond Blades

General Purpose Diamond Blades for Concrete and Asphalt

Diamond blades designed for mixed-material jobs give contractors the flexibility to cut cured concrete, asphalt, masonry, brick, pavers, and stone without constant blade swaps. A general purpose diamond blade uses a medium-bond matrix that balances cutting performance across these materials rather than optimizing for any single one.

These blades work well for mixed materials, intermittent use, and shorter runs. For high-volume asphalt or very hard aggregate, a specialty blade built for those extremes will outperform a general purpose option. Benchmark Abrasives has supplied direct-to-professional cutting tools for over 25 years.

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How to Match Your Blade Rim Style to the Job

Blade rim style determines how fast and clean your cut runs. To get consistent results, match the rim style to your dominant material:

• Segmented: Features gullets that clear slurry quickly for faster, cooler cuts in concrete, brick, and block.

• Turbo: Uses a continuous serrated edge for a smoother finish while staying faster than a continuous rim.

• Continuous rim: Designed strictly for wet-cut tile. Do not use this style for heavy concrete or asphalt.

Choosing the wrong rim style can lead to glazed segments or core failure. For a detailed comparison of how each style performs under load, read our rim configuration guide, which aligns with published industry guidelines.

These blades are the right choice for mixed materials, intermittent use, and shorter project runs. High-volume asphalt or hard aggregate requires a specialized bond to prevent rapid wear. Browse the general purpose collection to find the right blade specification.

The Physics of Diamond Blade Wear: Hardness vs. Abrasiveness

Diamond blades wear on an opposites-attract principle. Hard, non-abrasive materials require a soft metal bond that wears away predictably to expose fresh diamond grit. Soft, highly abrasive materials require a hard metal bond to resist abrasive slurry and prevent premature diamond loss. A general purpose diamond blade uses a medium-bond compromise, giving cost-effective performance across mixed jobs rather than extreme optimization for either material type.

Diagnosing Bond Mismatches

When the blade bond does not match the material, one of two failure modes typically appears:

• Glazing (bond too hard): The metal matrix fails to shed, leaving a smooth, polished segment that stops cutting, overheats, and vibrates.

• Rapid wear (bond too soft): Highly abrasive slurry quickly strips the soft matrix, releasing diamonds before they can cut.

You can restore a glazed blade by cutting into an abrasive dressing stone to strip the polished metal and expose fresh grit. If segments vanish quickly on asphalt-heavy projects, switching to a dedicated hard-bond blade improves your cost-per-cut. For help selecting the correct bond for your equipment, call our team at (877) 841-1837.

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Diamond Blade Safety and OSHA Compliance

Mounting a general purpose diamond blade safely requires matching the accessory to both the machine and the material. Three guidelines cover the fundamentals:

• Confirm the blade diameter and arbor hole match your saw spindle size.

• Never exceed the maximum RPM rating stamped on the steel core.

• Avoid side-loading, twisting, or bending the blade while making a cut.

Wet cutting extends blade life and reduces dust. Dry cutting increases heat and accelerates segment failure. For handheld power saws cutting concrete or masonry, OSHA Table 1 specifies integrated water delivery as the primary control method. If you dry cut, you cannot rely on Table 1 and must follow the standard's alternative exposure assessment methods.

Follow OSHA standards and your tool manufacturer's instructions. Maintaining correct operational parameters protects both your crew and your equipment. If your jobsite also requires metal fabrication consumables, browse our premium cut-off wheels to keep your project moving.

Frequently Asked Questions About Diamond Blades

1. Segmented vs. turbo vs. continuous rim: which should I choose?

Choose your rim based on required cutting speed, material hardness, and finish quality. Segmented rims deliver the fastest, coolest cuts on rough materials like concrete and brick but leave a rougher edge. Turbo rims offer a balanced middle ground: faster than continuous rims with a cleaner finish. Continuous rims are designed strictly for wet-cut tile and stone to prevent chipping. For a detailed breakdown, read our rim configuration guide.

2. Can I use one general-purpose blade for both concrete and asphalt?

Yes, but with a performance tradeoff. These blades use a medium-hardness bond designed to cut both hard concrete and highly abrasive asphalt. On high-volume asphalt projects, the segments will wear down rapidly. For large asphalt-cutting jobs, a dedicated hard-bond blade yields a better cost-per-cut by lasting significantly longer.

3. Why did my diamond blade stop cutting even though it still has segment height?

Your blade has likely glazed. This happens when the metal bond is too hard for the material, preventing the matrix from wearing away. The diamond grit becomes polished smooth instead of sharp. To restore the cutting edge, make several shallow passes into an abrasive dressing stone, a soft brick, or asphalt. This strips the polished metal layer and exposes fresh diamonds. Replace the blade if the segments are structurally damaged.

4. What is the 'opposites attract' rule for bond hardness?

Hard materials require a soft metal bond, while soft, abrasive materials require a hard metal bond. When cutting hard concrete, a soft bond wears away quickly enough to expose new, sharp diamond particles. When cutting highly abrasive materials like asphalt, a hard bond resists the grit and prevents premature diamond loss. General-purpose blades sit in the middle, offering a balanced, medium-hardness bond for mixed jobs.

5. Can I dry cut concrete with a handheld saw?

Dry cutting is possible but requires strict safety precautions. Wet cutting is always preferred because water controls hazardous silica dust and cools the blade. Under OSHA Table 1, handheld power saws used for concrete cutting must have an integrated water delivery system. If you cut dry, you must establish alternative exposure control methods that comply with safety standards and your company's safety program.

Ready to cut smarter on your next job? A general purpose diamond blade handles the mixed-material demands that most jobsites throw at you. Browse the full general purpose collection at Benchmark Abrasives and get the right blade in your hands fast.

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