Cutting fully cured, hardened concrete calls for a blade built differently than one made for fresh slab work. The MK Diamond MK-505 28" laser-welded blade is made for concrete cutting contractors, demolition crews, and flatwork sawcutting companies running high-horsepower walk-behind and rider saws through dense, aged concrete every day. Its laser-welded segments hold up to the heat and stress that deep, high-production cuts generate, so crews get a straighter cut, fewer lost segments, and more footage out of every blade before it needs replacing.
Use Cases
- Cutting control joints, saw-cut removal lines, and demolition cuts in fully cured concrete slabs and structures
- Deep, high-production cuts on high-horsepower walk-behind and rider concrete saws
- Flatwork sawcutting on aged parking lots, warehouse floors, and roadways
- Demolition and remodel cutting of hardened foundations, walls, and footings
- Utility, trench, and pipe-bedding cuts through set concrete on commercial job sites
Specifications
- Diameter: 28"
- Width/Kerf: .210"
- Arbor: 1"
- Segment type: Laser-welded diamond segments, 12mm segment height (per manufacturer specification)
- Construction: Laser-welded segment-to-core weld for heat resistance and segment retention under heavy load
- Bond grade: Premium-grade bond engineered for fully cured, hardened concrete; multiple bond hardness options available to match aggregate type
- Cutting method: Wet cutting
- Equipment: Rated for high-horsepower walk-behind and rider concrete saws
- Maximum operating speed: Never exceed the maximum RPM stamped on the blade per ANSI B7.1; always match blade speed to your saw manufacturer's guidelines
Frequently asked questions
What makes a laser-welded blade different from a standard diamond blade?
Laser welding fuses each diamond segment directly to the steel core with a deep, continuous weld, instead of relying on sintering or brazing alone. That weld holds up better under the heat and stress of cutting hardened, fully cured concrete, so segments are far less likely to crack off or separate during a long cut.
Is the MK-505 meant for wet or dry cutting?
The MK-505 is built as a wet-cutting blade. Water cools the segments and core during the cut, which helps the laser-welded bond last longer and keeps the blade cutting cleanly through dense, cured aggregate.
What size saw do I need to run a 28 inch blade?
A 28" diameter blade like the MK-505 is designed for high-horsepower walk-behind or rider concrete saws. Always check your saw manufacturer's guard, arbor, and horsepower requirements before mounting a blade this size.
Can I use this blade on green or uncured concrete?
The MK-505 bond is formulated for fully cured, hardened concrete. On green or fresh concrete, a bond this hard tends to glaze over instead of cutting efficiently; a softer bond made for green concrete will perform better on that material.
How do I pick the right bond hardness for my job?
Bond hardness should match the hardness of the aggregate in the concrete you are cutting. Harder, more abrasive aggregate needs a softer bond that wears fast enough to keep exposing fresh diamonds, while softer aggregate calls for a harder bond that will not wear away too quickly. MK Diamond offers the MK-505 in multiple bond options for this reason.
Discount Cleaning Products is an authorized MK Diamond dealer, stocking genuine MK-505 laser-welded blades for concrete cutting contractors, demolition crews, and flatwork sawcutting companies across the U.S. Our U.S.-based team can help confirm the right diameter, width, and bond hardness for your saw and job before you order.
