Deep cuts in cured concrete - highway pavement, bridge deck, airport apron, full-depth slab removal - are where blade choice stops being a preference and starts being the job. The MK Diamond MK-525 in 28-inch diameter with a .210 kerf is a supreme-grade wet blade for flat-saw operators who need depth in a single pass and cannot afford to change blades halfway through a shutdown.
Built for
- Cut deep joints and full-depth sections in cured concrete pavement
- Saw highway, airport and bridge-deck concrete on walk-behind flat saws
- Remove concrete slab sections where a smaller blade cannot reach depth
- Run wet on higher-horsepower saws in the 12 to 25 hp class
MK rates the MK-525 as its best cured-concrete blade, above the standard-grade MK-500 and the premium-grade MK-505. It is specifically rated best for hard aggregate with non-abrasive sand and best for soft aggregate with abrasive sand, and good for medium-hard aggregate with abrasive sand. If you know your local mix, that matrix is worth matching against before you buy, because aggregate hardness drives blade life more than almost any other variable.
The 28-inch diameter is what buys the depth. The .210 kerf is heavy for a reason - a blade this large needs the body to stay stable at speed and under load, and a thin core at that diameter would deflect. MK builds the MK-525 with a 15mm segment height, the tallest in its contractor concrete range, which is how a blade this expensive earns its keep over a long run of cutting.
Depth costs power. MK rates this range for 12 to 25 hp, higher than the 8 to 20 hp of its smaller blades, and an underpowered saw will bog and glaze the blade rather than cut. Check your saw's maximum blade diameter too - the guard, not the arbor, is usually what sets the limit.
Specifications
- Manufacturer: MK Diamond
- Model: MK-525
- Part number: 150131
- Grade: Supreme
- Material: Cured concrete
- Diameter: 28 inches (711mm)
- Width (kerf): .210 inches
- Arbor: 1 inch
- Segment height: 15mm
- Horsepower range: 12 - 25 hp
- Bond: Laser welded
- Cutting method: Wet only
Frequently asked questions
What saw do I need to run a 28-inch blade?
A walk-behind flat saw rated for a 28-inch blade with 12 to 25 hp, which is MK's rating for the MK-525 range. The saw guard usually sets the maximum diameter, so check that first. An underpowered saw will bog and glaze the blade instead of cutting.
How does the MK-525 compare to the MK-500 and MK-505?
They are three grades of cured-concrete blade. MK rates the MK-500 as good, the MK-505 as better and the MK-525 as best. The MK-525 is also the only one of the three MK rates for hard aggregate with non-abrasive sand.
Can I use it on green concrete or asphalt?
No. It is bonded for cured concrete. Fresh concrete needs the softer bond of a green-concrete blade such as the MK-605W, and asphalt needs an asphalt blade. Using a cured-concrete blade on green concrete will glaze it over and stop it cutting.
Why is the kerf so wide at .210?
Stability. A 28-inch blade under load needs a thicker core to resist deflection, and a thin core at that diameter would wander in the cut. The wider kerf also removes more material, which is often what a full-depth removal cut needs anyway.
Discount Cleaning Products is an authorized MK Diamond dealer. Our US-based team can help you match blade diameter, kerf width and bond to the saw and the material you are actually cutting, so you are not guessing at a part number. If you are not sure which blade in the range fits your saw, contact us with your saw model and horsepower and we will point you to the right one.
