Makita Diamond Blade Set B-69646 14 Inch (Segmented 3 Pack 12mm Height 5400 RPM Gas Power Cutters Concrete Block Brick Paver Cutting)

Makita B-69646 14-Inch 3-Pack Segmented General Purpose Diamond Saw Blades

The Makita B-69646 14-Inch 3-Pack Segmented General Purpose Diamond Saw Blade Set is a contractor-grade masonry cutting accessory bundle engineered for wet or dry slicing through cured concrete, cinder block, brick, and concrete pavers. Operating at rotational speeds up to 5,400 RPM with a dual 1-inch and 20mm arbor, 12mm segment height, and laser-welded diamond rims, these blades feature tensioned steel cores to absorb operational vibrations. Optimized for 14-inch gas power cutters and handheld masonry saws, this 3-blade contractor pack solves segment loss, blade wobble, and slow penetration issues across commercial jobsite concrete and hardscape installations.

Best Used For:

• Cured Concrete & Slab Expansion Joint Cutting: Slicing straight, clean expansion relief joints into cured concrete slabs using gas power cutters.
• Cinder Block & Brick Wall Construction: Trimming concrete masonry units (CMU), clay brick, and stone structural blocks to exact project dimensions.
• Hardscape Paver & Patio Installation: Executing high-speed wet or dry miter cuts on dense concrete interlocking pavers and retaining wall units.

Key Performance & Safety Features

• 12mm Extended-Height Segments: Taller 12mm (0.47 in.) diamond segments deliver up to 3X longer cutting lifespan compared to standard 8mm blades.
• Laser-Welded Joint Construction: Industrial laser welding secures diamond segments permanently to the steel core for structural safety under severe torque loads.
• Optimized Matrix Slotted Rim: Segment slot geometry clears slurry and dust rapidly to achieve up to 15% faster cut rates than standard blades.
• Tensioned High-Strength Steel Core: Dynamically balanced core plate reduces operational chatter and heat distortion at maximum 5,400 RPM speeds.
• Dual Arbor Size Compatibility: Universal 1-inch arbor hole includes a knockout bushing for seamless mounting on 20mm gas power cutter shafts.
• Wet & Dry Cutting Capability: Formulated bond matrix maintains structural integrity during both dry jobsite passes and water-cooled wet cuts.

What's Included

• (3) Makita B-69646 14 in. Segmented General Purpose Diamond Blades

Technical Specifications

Pro-Tip: Dress the diamond segments periodically by making a few short passes in an abrasive soft brick or sandstone block to re-expose fresh diamond grit when cutting hard cured concrete.