Some jobs let you pick the right blade for the material. Remodel work, demolition and repair usually do not - you open a wall and find brick behind stucco, or a slab with block footing under it, and the cut has to keep going. The MK-404D is MK Diamond's Supreme Grade general purpose blade for exactly that situation: one dry-cutting blade for concrete, brick, block, plaster and stucco. This part number is the 12 in. diameter with a .375 in. kerf on a 1 in. arbor.
Use Cases
- Mixed-material demolition and remodel cutting where one blade has to handle whatever is there
- Concrete, brick, block, plaster and stucco on the same jobsite without swapping wheels
- Opening a wider slot in one pass for expansion joints, chases and repair work
- Rental fleets and general contractors that cannot stock a blade per material
- Repair and retrofit work where the material behind the surface is unknown until you cut
Built for the crew that cannot stock a blade per material
General contractors, remodelers, demolition crews and rental fleets all run into the same math: carrying a material-specific blade for every substrate costs more in inventory and lost time than it saves in cut speed. A general purpose blade in MK's top grade is the practical answer. Supreme Grade carries MK Diamond's highest diamond concentration of its three tiers, the segments are laser welded to the core, and they stand 10mm tall, so a single blade covers a lot of jobsite before it needs replacing.
About this width
A .375 in. kerf is a wide-slot blade, well past standard thickness, for joints and chases that have to accept backer rod, sealant or repair material without a second pass. A wider kerf is not simply a bigger blade - it removes more material per linear foot, so the saw works harder and the feed rate drops. That is the trade you are making for a wider slot in one pass. As with any dry cutting in concrete or masonry, respirable crystalline silica is the real hazard on this work, so dust control and respiratory protection belong in the setup, not in the cleanup.
Specifications
- Manufacturer: MK Diamond Products
- Model: MK-404D
- Part number: 150387
- Grade: Supreme Grade
- Application: General purpose concrete and masonry, dry cutting
- Blade diameter: 12 in. (305mm)
- Blade width (kerf): .375 in.
- Arbor: 1 in.
- Segment height: 10mm
- Segment attachment: Laser welded
Frequently asked questions
What materials will the MK-404D cut?
MK Diamond describes the MK-404D as a general purpose blade for concrete and masonry materials, covering concrete, brick, block, plaster and stucco. It is the blade for a crew that does not know exactly what is behind the wall until the cut is open.
Is a general purpose blade a compromise?
It is a deliberate one. A material-specific blade will out-cut it in that one material, but a general purpose blade saves the blade change and the second blade on jobs that move between concrete, brick and block in the same hour. Supreme Grade is MK's top tier, so the trade-off is breadth rather than quality.
Why choose the .375 in. kerf?
A .375 in. kerf is a wide-slot blade, well past standard thickness, for joints and chases that have to accept backer rod, sealant or repair material without a second pass. Diameter controls depth of cut, width controls how wide the slot is - and a wider kerf also means more material for the saw to remove, so expect a slower feed than a thin blade.
Does it run wet or dry?
MK Diamond lists the MK-404D under its dry cutting general purpose blades. Dry cutting concrete and masonry produces respirable crystalline silica, so set up dust control and respiratory protection before the saw starts.
What does laser welding change?
Laser welding fuses the segment to the steel core rather than brazing it on. It is the attachment method rated for the heat and feed pressure of powered dry cutting, which is exactly the condition that separates segments on lesser blades.
Discount Cleaning Products is an authorized MK Diamond dealer. MK Diamond Products builds its saws, blades and diamond tooling out of Torrance, California, and US-based product support stands behind the line. If you are not sure which width or arbor matches your saw, contact us before you order and we will match the blade to the machine.
