Not every high-speed cutoff saw takes a 1" arbor — a lot of masonry saws and gas-powered cutoff saws in the field are built around a 20mm spindle instead, and it's easy to end up with a blade that won't seat on your machine. The MK-414D 151391Z is the 20mm-arbor version of MK Diamond's standard-grade hard brick blade, built for bricklayers and masonry contractors who need a segment that drops straight onto a 20mm shaft and gets through hard-fired clay brick without babying it.
Use Cases
- Dry-cutting hard-fired clay brick and dense face brick on 20mm-arbor high-speed cutoff saws
- Trimming and coping brick for chimneys, fireplaces, and veneer work
- Cutting hard paver brick and brick pavers for hardscape and walkway installs
- Production cutting on masonry job sites where a fast blade change matters more than a specialty segment
Specifications
- Diameter: 14"
- Arbor: 20mm
- Blade width: .125"
- Segment height: 10mm
- Segment type: laser-welded diamond segments, standard grade
- Cutting mode: dry cutting
- Recommended operating speed: 2,500 RPM (never exceed 4,365 RPM for a 14" blade, per MK Diamond's blade manual)
- Material: hard-fired brick and similar hard masonry
Frequently asked questions
What's the difference between ProductCode 151391 and 151391Z?
Both are the same MK-414D standard-grade high-speed blade for hard brick, 14" diameter with 10mm segments. The difference is the arbor: 151391 is built with a 1" arbor, while 151391Z (this listing) has a 20mm arbor to fit saws with a metric spindle.
What size saw does this blade fit?
This is a 14" blade with a 20mm arbor, sized for high-speed cutoff saws and masonry saws that use a 20mm spindle rather than a 1" shaft. Check your saw's arbor size before ordering, since the two arbor sizes are not interchangeable without a bushing.
Is this blade rated for wet or dry cutting?
The MK-414D is a dry-cutting blade. It's designed to be run dry on a high-speed cutoff saw for hard brick, without a water feed.
What RPM should this blade run at?
MK Diamond's blade manual lists a recommended operating speed of 2,500 RPM for a 14" blade, with 4,365 RPM as the maximum you should never exceed. Running outside that range can cause wobble, flutter, and premature core wear.
Can this blade also cut pavers or block, not just brick?
It's built and rated for hard-fired brick, and it will also handle hard paver brick used in hardscape work. For high-volume concrete block or reinforced concrete cutting, a segment designed specifically for that material will hold up longer.
Discount Cleaning Products is an authorized MK Diamond dealer stocking the MK-414D 151391Z 20mm-arbor hard brick blade alongside the full MK Diamond masonry blade line. Our US-based team can help you confirm arbor size, segment specs, or fit before you order.
