The MK-625W is MK Diamond's Supreme Grade laser-welded blade for cutting asphalt over concrete, and this is the 18-inch size, part number 151462. Paving contractors, utility crews and municipal maintenance departments reach for it when a trench or patch line runs through an asphalt surface laid over a concrete base. That combination is hard on blades: the asphalt is abrasive and gummy, and the concrete underneath demands a bond that keeps the diamond exposed. MK designs this blade for wet cutting on saws in the 8 to 20 horsepower range.
Use cases
- Asphalt over concrete patches. Squaring off the edges of a repair so the patch has clean sides.
- Utility trenching. Opening a straight cut line through asphalt overlay and the slab below.
- Road and lot maintenance. Cutting joints and removing damaged sections for municipal crews.
- Expansion and control joints. Cutting joints where an overlay sits on a concrete base.
- Contractor saw fleets. An 18-inch blade for saws in the 8 to 20 horsepower range.
Specifications
- Diameter: 18 inches (450 mm)
- Blade width (kerf): 0.155 inch
- Arbor: 1 inch
- Segment height: 12 mm
- Construction: Laser welded
- Grade: Supreme
- Recommended power: 8 to 20 hp
- MK part number: 151462
Fits
MK lists the MK-625W for equipment in the 8 to 20 horsepower range. The 18-inch 151462 has a 1-inch arbor. Confirm your saw's blade diameter, arbor and horsepower before ordering, and follow the saw maker's guidance on water supply.
Frequently asked questions
What is the MK-625W designed to cut?
MK designs it as a Supreme Grade laser-welded blade for asphalt over concrete, run wet.
What horsepower saw does it need?
MK lists the MK-625W for equipment in the 8 to 20 horsepower range. Match the blade to your saw's power and confirm the saw's blade capacity.
Why does asphalt over concrete need a specific blade?
Asphalt is abrasive and can load the blade, while the concrete base is hard. A blade built for the combination keeps cutting through both layers without dulling quickly.
Should I run it wet?
MK designs the MK-625W for wet cutting. Water cools the blade, controls dust and keeps the segments cutting, so confirm water is reaching the blade before starting a cut.
The blade stopped cutting but the segments still look tall. What happened?
That is glazing. The bond has smeared over the diamonds, usually from heat, too much feed pressure or a blade that does not suit the material. Dress the blade by cutting an abrasive material such as a concrete block to re-expose the diamond, and ease off the feed.
MK Diamond Products is an American diamond-tool manufacturer whose family business traces back to 1868, when Joseph Musto founded the Musto Steam Marble Mill in San Francisco. Discount Cleaning Products is an authorized MK Diamond dealer and stocks MK blades and profiling tools alongside its surface preparation line, with US-based order support if you need help matching a blade to your saw.
