The MK-404CR in the 8-inch size is the blade tile setters reach for when the material is hard enough that an ordinary blade starts chipping the glaze. It is a dry-cutting, thin continuous rim diamond blade built for porcelain, vitreous ceramic and other dense hard materials, and its whole design brief is a clean edge rather than a fast one. For anyone cutting finished tile that will sit in plain view, that trade is the entire point.
Built for
- Tile and stone contractors cutting porcelain and vitreous ceramic on site
- Remodelers making finish cuts where the tile edge stays exposed
- Flooring crews working dry indoors where a wet saw is impractical
- Countertop and backsplash installers needing accurate, low-chip cuts
- Maintenance shops keeping one blade on hand for hard-material repairs
Why a thin continuous rim
A segmented blade cuts quickly because gaps in the rim clear debris and carry away heat, but each gap is also a point where the blade can catch the glaze and pull a chip. A continuous rim removes those interruptions entirely, so the cutting edge stays in constant contact and the glaze is sheared rather than picked at. Keeping the core thin at .060 means less material has to be removed on every pass, which is what holds heat build-up down on a dry cut. Heat is the practical limit on dry cutting: it discolors some tile bodies, it can work-harden the bond, and it is the usual reason a blade that started well stops cutting halfway through a job.
Getting the most from it
Dry cutting asks the operator to manage the heat the water would otherwise carry off. Let the blade reach full speed before it touches the tile, use steady moderate pressure rather than pushing, and on longer cuts back the blade out periodically and let it spin free in air for a few seconds. On very dense porcelain, scoring a shallow pass first and then cutting to depth produces a noticeably cleaner edge than trying to take the full thickness in one go.
Specifications
- MK Diamond part number: 140319
- Model: MK-404CR
- Grade: Supreme Grade, blade for hard materials
- Diameter: 8 inches
- Width: .060
- Arbor: DM-5/8-inch
- Rim height: 7mm
- Rim type: thin continuous rim
- Application: dry cutting hard and vitreous ceramic tile
Frequently asked questions
Does the MK-404CR need water to cut?
No. It is built as a dry cutting blade, so no water feed is required. It can be run wet if your saw supplies water, and wet cutting will run the blade cooler and extend its life on long production cuts.
What arbor does part 140319 use?
MK Diamond lists the 8-inch 140319 with a DM-5/8-inch arbor, which is the common mount for tile saws and angle grinders in this size.
Will it cut porcelain without chipping?
Chip-free cutting of hard and vitreous tile is what the continuous rim is designed for. Edge quality also depends on technique, so let the blade reach speed before contact and use moderate, steady feed pressure rather than forcing the cut.
How does this differ from a segmented blade?
A segmented blade cuts faster but the gaps in its rim tend to chip glazed and vitreous surfaces. The continuous rim on the MK-404CR trades some cutting speed for a markedly cleaner edge.
What is the 7mm rim height for?
Rim height is the depth of diamond-bearing material above the core, and it is what determines how much usable life the blade has before the rim wears down to the steel.
Discount Cleaning Products is an authorized dealer with US-based product support, and stocks the consumables and wear parts that go with this item so a single order covers the whole repair.
