The MK-925D is MK Diamond's Supreme Grade general purpose masonry blade, and this is the 4-1/2-inch size with a 7/8-inch to 5/8-inch arbor, part number 151762. Bricklayers, remodelers and maintenance crews put it on a 4-1/2-inch angle grinder for fast, clean cuts in brick, block and other masonry. The 4-1/2-inch grinder is the most common cutting tool on a jobsite, and a blade that does several materials well saves a trip to the truck. The 0.080-inch kerf keeps the grinder from bogging down.
Use cases
- Brick and block trimming. Quick cuts around openings and corners.
- Mortar and joint work. Cutting into joints for repair.
- Pavers and stone. Trimming pavers and light stone.
- Tile and concrete touch-ups. General cuts where a grinder is the right tool.
- Maintenance. Small masonry repairs without a saw setup.
Specifications
- Diameter: 4-1/2 inches (114 mm)
- Blade width (kerf): 0.080 inch
- Arbor: 7/8 inch - 5/8 inch
- Rim height: 10 mm
- Grade: Supreme
- MK part number: 151762
Fits
The 151762 has a 7/8-inch to 5/8-inch arbor for most 4-1/2-inch angle grinders. A sister part, 151763, uses a 20mm to 5/8-inch arbor, so check which your grinder needs. Confirm the blade's maximum RPM against your grinder's no-load speed.
Frequently asked questions
What is the difference between 151762 and 151763?
Both are 4-1/2-inch MK-925D blades. The 151762 has a 7/8-inch to 5/8-inch arbor, and the 151763 has a 20mm to 5/8-inch arbor.
What does general purpose mean?
MK designs the MK-925D to cut several masonry materials rather than a single specialty one.
Which grinders does it fit?
Any grinder that takes a 4-1/2-inch blade with a matching arbor, provided its speed does not exceed the blade's rating.
How do I control silica dust when cutting concrete or masonry?
Cutting concrete and masonry releases respirable crystalline silica. NIOSH recommends water suppression or a shrouded tool connected to a HEPA vacuum, plus respiratory protection. Plan your dust control before the blade goes on the saw.
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.
