The MK Diamond MK-925D is the supreme grade general purpose blade in MK's masonry line, and part 150668 is the 6-inch (152mm) continuous rim version with a 7/8-inch arbor with 5/8-inch reduction. It is built for contractors who cut brick, block, concrete and stone dry, on site, and who need one blade that handles whatever the day puts in front of it rather than a different blade for every material.
Built for
- Masonry and hardscape crews sizing brick, block, pavers and wall caps on site
- Landscape contractors trimming retaining wall block and edging to fit a curve
- Restoration and remodel work where a clean cut face will stay visible
- Facility and grounds maintenance shops that keep one general purpose blade on the shelf
- Rental fleets that need a blade covering a range of masonry materials
Why the continuous rim matters
MK builds the MK-925D in two rim styles. Part 150668 is a continuous rim blade, where the diamond edge runs unbroken around the blade instead of being split into segments. An unbroken rim removes less material at the edge of the cut, so it leaves a cleaner face with less chipping and spalling than a segmented rim does. That is the reason to reach for it on exposed work such as wall caps, veneer, paver edges and any cut that will not be buried in mortar. MK publishes the continuous rim from 3-3/8-inch through 10-inch and switches to a segmented rim at 12-inch and above.
Working it dry
A continuous rim has no gullets to pull air through the cut, so heat management is on the operator. Take several shallow passes rather than forcing one deep plunge, and let the blade run free in open air for a few seconds between cuts so the core can shed heat. Forcing the blade is what glazes a rim and costs you the back half of its life. Dry cutting masonry also releases respirable crystalline silica, so run a dust shroud and extractor where the tool accepts one and wear rated respiratory protection.
Specifications
- MK Diamond part number: 150668
- Series: MK-925D, supreme grade general purpose
- Diameter: 6-inch (152mm)
- Blade width: .080-inch
- Arbor: 7/8in-5/8in
- Rim style: continuous rim
- Rim height: 10mm
- Cutting method: dry
- Materials: brick, block, concrete, granite and other masonry
Fitting it to your tool
A diamond blade is specified by diameter, width and arbor, not by tool brand, so the 6-inch diameter and 7/8in-5/8in arbor are what decide whether part 150668 mounts on your machine. This size suits larger angle grinders and small masonry saws with a 7/8-inch or 5/8-inch spindle. Check two things before ordering: the largest blade diameter your saw is rated to take, and the spindle size. MK publishes the MK-925D continuous rim in 3-3/8-inch, 4-inch, 4-1/2-inch, 5-inch, 6-inch, 7-inch, 8-inch, 9-inch and 10-inch, with more than one arbor in several of those sizes, so there is usually a part in the same line that fits if this one does not.
Frequently asked questions
Is the MK-925D a wet or a dry cutting blade?
MK Diamond publishes the MK-925D as a dry cutting blade and lists the series under its dry cutting turbo rim blades. Run it dry. Follow the saw manufacturer's guidance on maximum rated speed for a 6-inch blade.
What materials will this blade cut?
MK specifies the MK-925D for brick, block, concrete, granite and other masonry materials. It is the general purpose choice in the MK masonry line rather than a blade tuned to one single material.
Will part 150668 fit my saw?
The 6-inch MK-925D uses a 7/8-inch arbor that reduces to 5/8-inch, which covers most grinders and small saws sold in the US. MK publishes the same continuous rim line in 5-inch and 7-inch if 6-inch is not the size you need.
Is this a continuous rim or a segmented rim blade?
Part 150668 is a continuous rim blade. MK publishes the MK-925D with a continuous rim from 3-3/8-inch through 10-inch, and with a segmented rim from 12-inch through 18-inch. The continuous rim is the one to pick when the cut face will be seen.
How do I get the most life out of it when dry cutting?
Work in several shallow passes instead of forcing one deep plunge, and let the blade spin free in open air between cuts so it can shed heat. A dry cut also puts respirable silica dust in the air, so pair the saw with a dust shroud and extractor and wear rated respiratory protection.
Discount Cleaning Products is an authorized dealer for MK Diamond and a US-based supplier of masonry, concrete and surface preparation consumables. Part 150668 ships as the genuine MK Diamond part number shown above. If you need a different diameter or a different arbor in the MK-925D line, or you are not sure which rim style suits the cut, call or email us and we will work it out with you.
