Most crews do not want a blade for every material; they want one blade that handles the mixed bag a day actually throws at them. That is the job MK builds the MK-404D for. It is a dry-cutting segmented general purpose blade for concrete and masonry materials, 7-inch (178mm) in diameter by .125-inch kerf on a 5/8-inch arbor, and it suits general contractors, remodelers, plumbers and electricians cutting block, brick and concrete on the same job without swapping blades between each one.
Use cases
- General purpose cutting across concrete, block and brick on mixed-material jobs
- Openings and penetrations for plumbing, conduit and HVAC runs through masonry
- Trimming block and brick to fit during wall, step and foundation work
- Small demolition and repair cuts where setting up a wet saw is not worth the time
- Punch-list and service work where the blade lives on the grinder or cut-off saw
What you are buying with Supreme Grade
MK heads this family as its Supreme Grade general purpose, high speed line for concrete and masonry materials. In practice a general purpose bond is a deliberate compromise: it will not out-cut a purpose-bonded blade on any single material, but it stays usable across all of them, which is what saves you time when the day is half block and half concrete. If you are cutting one material all day, a blade matched to that material will outlast this one, and we would rather tell you that up front.
The segments are laser welded to the steel core and stand 10mm tall. Laser welding is the bond that tolerates dry-cutting heat, and the segment gaps let air through the cut to cool the core and clear debris. Segmented rim blades generally run better dry than continuous rims for exactly that reason: the gaps are cooling and clearance, not just tooth pattern.
Dry cutting concrete and masonry raises respirable crystalline silica, which is regulated on most jobsites, so pair the blade with a shroud and vacuum or feed water at the cut. The one-way rule applies here too: this dry blade tolerates water, while a wet-only blade must never be run dry.
Specifications
- Manufacturer: MK Diamond Products
- Model: MK-404D
- Part number: 150662
- Diameter: 7-inch (178mm)
- Width (kerf): .125-inch
- Arbor: 5/8-inch
- Segment height: 10mm
- Segment attachment: Laser welded
- Cutting method: Dry cutting, segmented rim
- Material: General purpose: concrete and masonry materials
- Grade: Supreme Grade
Frequently asked questions
What does general purpose actually mean here?
It means one bond chosen to work acceptably across concrete, block and brick rather than optimally on any one of them. That is the right trade when a job mixes materials. If you cut a single material all day, a blade bonded for that material will cut faster and last longer.
Can I run it wet?
Yes. It is a dry-cutting blade by design, and that is its advantage, but water at the cut for dust control or cooling is fine. The rule runs one way only: a dry blade can be used wet, but a wet-only blade must never be run dry.
Will it cut rebar or reinforced concrete?
It is bonded for concrete and masonry, not for steel. Clipping light rebar in a slab cut happens on real jobs and the blade will get through it, but steel wears diamond segments quickly. If you expect heavy reinforcement, ask us about a blade specified for reinforced concrete.
What arbor does this part number take?
This is the 5/8-inch version. MK lists the same 7-inch blade in other arbor and kerf combinations under separate part numbers, so check your saw or grinder's spindle before ordering and ask us if you are unsure.
Does a segmented rim leave a rougher edge than a continuous rim?
Generally yes. A segmented rim trades some edge finish for cutting speed and cooling, which is the right choice on structural concrete and masonry. For a chip-free finish on tile or stone, a continuous rim blade is the better tool.
Discount Cleaning Products is an authorized MK Diamond dealer. Our US-based team works with these blades and saws every day, so if you are unsure which diameter, kerf or arbor suits your saw, call or email before you order and we will match the part to the machine. Orders are backed by the manufacturer warranty and by support that stays reachable after the sale.
