Granite is the material that punishes a cheap blade. The MK Diamond MK-62G is the premium grade segmented rim blade MK builds specifically for it, and part number 135749 is the 20-inch size. Stone fabricators, monument shops and countertop shops run this blade wet on slab saws and bridge saws when the job is rough-sizing granite and the finished edge will be dressed or polished afterward. The reason to reach for a granite-specific bond rather than a general stone blade is simple: the bond is matched to the hardness of the material, so the diamonds stay exposed and cutting instead of glazing over and burnishing.
Built for
- Rough-sizing granite slabs on a bridge saw or slab saw before edge work
- Monument and headstone shops cutting granite blanks to length
- Countertop fabricators breaking down full slabs ahead of seaming and polishing
- Cutting granite curbing, pavers and dimensional stone to size
- Production stone shops that need a predictable cost per cut on a hard material
What sets this blade apart
Three things matter once the blade is on the arbor. First, the segmented rim. MK builds gullets between the segments so water and slurry get into the cut and heat gets out; that is what keeps a blade from overheating, cracking and throwing segments on a long continuous cut. Second, the 8mm segment height MK publishes for this series is usable diamond depth, which is the honest way to compare blade life between brands rather than comparing sticker prices. Third, the premium bond. Granite fabricators who have run soft-bond blades on hard stone know the failure mode: the blade stops cutting, the operator pushes harder, and the feed pressure is what chips the slab. A bond matched to granite keeps the blade self-sharpening so the feed rate stays light.
Specifications
- MK Diamond part number: 135749
- Blade series: MK-62G, premium grade
- Diameter: 20-inch (508mm)
- Width: .125-inch
- Arbor: 1-inch
- Segment height: 8mm
- Rim style: segmented rim
- Cutting method: wet
- Material: granite and other hard stone
- MK category: Segmented Rim Wet Cutting Blades (Stone)
Choosing the right size in this series
MK publishes the MK-62G in 7, 8, 10, 12, 14, 16, 18 and 20-inch diameters. The widths step up with diameter, from .080-inch on the small blades to .125-inch on the 16, 18 and 20-inch sizes, and the arbor moves from 5/8-inch on the small blades to 1-inch on the large ones. Match the diameter to the maximum your saw is rated for and the arbor to your spindle.
Frequently asked questions
Can this blade be used dry?
No. This is a wet cutting blade and it needs continuous water at the cut. The rule that stone fabricators repeat is that a dry blade can be run wet, but a wet blade cannot be run dry, and even a few seconds of dry cutting can be enough to damage the core.
Will a segmented blade chip the polished face?
A segmented rim cuts faster but leaves a rougher edge than a continuous rim, so it is meant for cuts that get dressed, polished or hidden. If the cut edge is the finished visible edge, either score a shallow first pass along the line or use a continuous rim blade for the final pass.
What arbor does part 135749 use?
MK Diamond publishes part 135749 with a 1-inch arbor. MK notes that stock arbors can be bushed to smaller sizes if that is specified when the order is placed, and that additional diameters and special arbors are available on request.
Why is my blade cutting slower than when it was new?
That is usually glazing rather than wear. The bond has closed over the diamonds, most often from cutting a softer material than the blade was built for, or from too little water. Dressing the blade in an abrasive block re-exposes the diamond and restores the cut rate.
How do I know this is the right size for my saw?
Match the blade diameter to the maximum your saw is rated for and match the arbor exactly. Running a blade larger than the saw rating is an operator safety issue, not just a performance one, so check the saw plate before ordering.
Discount Cleaning Products is an authorized MK Diamond dealer. Every specification on this page is taken from the MK Diamond published product data for part number 135749, not estimated from the part number or copied from a marketplace listing. If you are not certain which diameter, width or arbor your saw takes, our US-based team can check it against the MK series table before you order.
