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| Brand Name: | XRTOOLS |
| Model Number: | 9 inch |
| MOQ: | 200pcs |
| Price: | $1.2-15/pcs |
| Delivery Time: | 25-30days |
| Payment Terms: | L/C, D/P, T/T, Western Union, MoneyGram |
The Problem: When commercial contractors use large cut-off saws to cut out doorways in brick walls, or plunge deep into concrete slabs for utility trenching, the blade operates deep inside the material for extended periods. Standard solid-core blades cannot shed the immense trapped heat. The steel core eventually reaches critical temperature and warps (wobbles) violently, binding the 9-inch blade inside the wall and creating a massive safety hazard.
The Result: Seized gas saws, dangerously warped blades that pose a kickback risk, and delayed demolition schedules due to frequent blade-cooling breaks.
Trapped Core Friction: In a 3-inch or 4-inch deep plunge cut, the entire surface area of the steel core rubs against the abrasive concrete walls of the kerf, generating extreme friction far away from the cooling edge.
Centrifugal Distortion: A massive 230mm steel plate spinning at 6,600 RPM undergoes immense physical stress. Without structural heat-relief points, the thermal expansion forces the steel to bow.
Spiral Aerodynamic Cooling Holes: This blade is engineered with a distinctive spiral array of laser-cut ventilation holes across the steel body. As the 9-inch blade spins, these holes act as a high-velocity centrifugal fan. They actively pull cool air down into the deep trench and violently flush out abrasive concrete dust, keeping the core structurally rigid and ice-cool during continuous demolition cuts.
Aggressive U-Slot Segmentation: The cutting perimeter features deep, wide U-slots between the diamond segments. This design prevents thermal expansion at the cutting edge and provides the massive clearance needed to eject large chunks of broken brick and mortar.
Heavy-Duty Matrix Formulation: Sintered with an optimized diamond-to-metal ratio designed specifically to handle the high torque and aggressive feed rates of heavy electric grinders and lightweight gas-powered cut-off saws.
| Technical Pillar | Imperial Specification | Metric Specification | Industrial Benefit |
| Diameter | 9" | 230mm | Maximum plunge depth for thick brick walls and slabs. |
| Arbor Size | 7/8" (Standard) | 22.23mm | Fits commercial large-frame 9-inch angle grinders. |
| Segment Height | 0.39" | 10mm | Extended high-concentration matrix for long service life. |
| Core Design | Spiral-Vented Steel | Spiral-Vented Steel | Prevents thermal warping in deep, continuous cuts. |
| Rim Geometry | Deep Segmented | Deep Segmented | Aggressive material removal in rough masonry. |
| Max RPM | 6,600 RPM | 6,600 RPM | Safely handles heavy-duty commercial motor speeds. |
Masonry Demolition: The definitive blade for plunge-cutting through thick cinder block (CMU) walls, structural brick facades, and retaining walls to create new windows or doorways.
Concrete Trenching: Rapidly cutting straight lines into cured concrete slabs, driveways, and sidewalks for plumbing or electrical utility trenches.
Heavy Hardscaping: Sizing and splitting massive natural stone boulders, thick concrete pavers, and heavy landscape steps in a single pass.
Rotational Inertia Warning: A 9-inch blade carries massive rotational kinetic energy. When turning off your grinder or saw, the blade will continue to spin for several seconds. Never set the tool down until the blade has come to a complete, dead stop.
Wet Cutting for Deep Plunges: While the spiral vents make this an exceptional dry-cutting blade, utilizing a water feed when plunging 3+ inches deep into a concrete slab is highly recommended to suppress hazardous silica dust and maximize the blade's lifespan.
RPM Verification: Ensure your cut-off saw or large angle grinder does not exceed the blade's 6,600 Max RPM rating. Using an oversized blade on an over-sped machine is a critical safety violation.
Q: Can I use this 9" blade on my gas-powered Stihl or Husqvarna cut-off saw?
A: Yes, but you must verify the arbor size. This blade features a standard 7/8" (22.23mm) arbor. Many popular gas saws (like the Stihl TS420) require a 20mm arbor. If your saw requires 20mm, you must use a precision 7/8"-to-20mm brass reduction bushing to mount this blade safely.
Q: Will this blade cut through steel rebar embedded in the concrete?
A: This is a cold-pressed masonry blade optimized for stone, brick, and concrete aggregate. While it can occasionally cut through thin wire mesh, hitting thick, solid steel rebar will rapidly strip the diamonds and dull the blade. If you are doing heavy demolition on steel-reinforced concrete, you must upgrade to a "Laser-Welded" diamond blade.
Q: Why does the blade have paint streaks across the core?
A: The high-visibility paint design allows operators and safety foremen to easily verify that the blade is spinning and track the rotational direction in dusty, low-visibility demolition environments.
Q: Can I use this blade to cut asphalt?
A: It is not recommended. Asphalt is highly abrasive but very soft; it will melt and "gum up" the segments of a standard concrete blade. You need a dedicated asphalt blade with "Drop Segments" to protect the steel core from undercutting.
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