High-Power Small Concrete Cutting Saw | XH-300A

High-Torque 81CC Demolition Engine: Delivers 2.9 kW of constant cutting power, preventing engine stall during intensive deep-penetration metal and masonry slicing.
100mm Full Penetration Depth: Accommodates a 12-inch diamond or resin wheel, achieving a 100mm deep single-pass cut through reinforced concrete and granite blocks.
180° Rotatable Safety Guard: Features an adjustable cast guard that instantly shifts angles to shield operators from dangerous high-velocity debris and rescue sparks.
Advanced Low-Vibration Steel Frame: Integrates an optimized dampening mount assembly with non-slip dual grips to minimize user hand fatigue over extended shifts.

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Product Detail

Product Overview

XH-300A is a commercial-grade, heavy-duty concrete quick cut saw engineered for high-intensity fire emergency rescue, municipal road repair, and demanding construction site demolition. Driven by a high-torque 81CC single-cylinder, air-cooled, 2-stroke gasoline engine, this portable power platform delivers 2.9 kW of rated power at an operational speed of 8500 rpm.

High-Power Small Concrete Cutting Saw

Core Advantages & Selling Points

Built to perform under extreme field conditions, the XH-300A features a rapid cold start time of

\le 7

seconds via an upgraded large pulley easy-start system. Equipped with a standard 12-inch (300×25.4mm) diamond or resin grinding wheel, this multi-purpose cut-off saw effortlessly achieves a cutting depth of 100mm and a high-efficiency cutting speed of ≥

\ge 453\text{ cm}^2/\text{min}

Cm².

Integrating a 180° rotatable blade guard for advanced spark protection and an optimized vibration reduction layout, this 13 kg balanced demolition saw gives international tool distributors, municipal engineering crews, and fire departments a rugged, non-stalling asset built for penetrating steel, concrete, rebar, and stone.

Non-Stalling 12-Hour Continuous Run: Outfitted with an optimized 25.6cc engine framework that fights thermal expansion, ensuring non-fading trimming power across long commercial shifts.
Widened 24" SK5 Alloy Blade: Features high-strength, double-edged SK5 steel blades engineered for razor-sharp edge retention and smooth cutting of dense branches.
Four-Spring Damping Anti-Vibration: Minimizes structural engine resonance through an internal 4-spring shock absorption cradle to isolate the operator's hands from fatiguing vibration.
90° Rotatable Ergonomic Handle: Adjusts instantly to multiple working angles with a quick-press locking mechanism, facilitating swift vertical shaping and side-shrub contouring.
Enlarged Leaf Collection Baffle: Designed with an expanded protective shield that prevents twigs from scattering, keeping the job site tidy while reducing clean-up timelines.

Technical Specifications

Item Parameter	Specifications & Core Metrics
Product Name	Gasoline Abrasive Cut-Off Saw / Fire Rescue No Tooth Cutting Saw
Model Number	XH-300A
Engine Type	Single-Cylinder, Air-Cooled, 2-Stroke Gasoline Engine
Engine Displacement	81 CC (High-Torque Powertrain Variant)
Power Output	2.9 kW / 8500 rpm
Cutting Depth	100 mm (Full Penetration Capacity)
Blade Diameter	12 Inch ( $300 \times 25.4\text{ mm}$ )
Blade Material Compatibility	Diamond / Resin Grinding Wheel
Cutting Speed	$\ge 453\text{ cm}^2/\text{min}$
Cold Start Response Time	$\le 7$ (Rapid Deployment Threshold)
Fuel Tank Capacity	0.7 L
Gas-to-Oil Mixing Ratio	25:1 (92# Gasoline : 2-Stroke Engine Oil)
Net Weight	13 kg
Packing Dimensions	$63 \times 30 \times 38\text{ cm}$

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All-Season Commercial Applications

Fire Emergency & Forced Entry Rescue: Essential tactical equipment for door breaking, vehicle extrication, and disaster clearing. Slices through structural metal and reinforced barriers instantly on active fire scenes.
Iron Sheet & Metal Machining: Easily cuts thick alloy plating, metal sheets, structural rebar, and aluminum extrusions for industrial processing, mechanical maintenance, or steel frame fabrication.
Wood & Timber Processing: Handles framing cuts, lumber cross-cutting, and old house reconstruction during building renovation or residential renewal projects.
Concrete & Masonry Cutting: Perfect as a small concrete cutting saw for slicing concrete slabs, granite blocks, marble tile, and pavement profiles during municipal road, bridge, and garden maintenance.

High-Power Small Concrete Cutting Saw

Complete Gas Cut-Off Saw Parts Diagram Matrix

Cutting & Shielding Components: Cutting Wheel / Saw Blade, Blade Clamping Flange, Blade Lock Nut, Rotatable Blade Guard, Blade Guard Adjustment Lever.
Engine & Powertrain Assembly: Engine Cylinder, Cylinder Cover, Decompression Valve, Muffler / Exhaust Silencer, Spark Plug, Carburetor Choke Lever.
Drive & Tensioning System: Belt Guard Cover 1, Belt Tensioner, Belt Guard Cover 2, Fastening Lock Nut.
Starting & Fuel Modules: Recoil Starter Assembly, Large Pulley Easy-Start System, Fuel Tank Cap, Engine Start Switch.
Control & Ergonomic Handling: Front Handle, Non-Slip Handle Grip, Rear Handle, Throttle Trigger, Handle Support Bracket.

Safety, Setup & Operating Instructions

Pre-Use Systems Inspection

Check the structural integrity of the heavy-duty metal body, blade tightness, and the operation of the 180° rotatable blade guard before initial start-up.
Ensure all fastening lock nuts and safety guards are firmly secured; inspect the diamond or resin grinding wheel for fractures or micro-cracks.

Correct Fuel Matching

Mix 92# gasoline and high-quality 2-stroke engine oil at a precise 25:1 ratio using a clean mixing bottle.
Never fill the fuel tank with pure gasoline or an incorrect mix ratio, as this will lead to severe engine scoring and void the powertrain warranty. Never refuel when the engine is running or hot.

Standard Startup Operation

Place the abrasive cut-off saw flat on stable, solid ground in a well-ventilated outdoor zone away from flammable materials.
Hold the non-slip dual handle firmly with both hands, activate the engine start switch, set the carburetor choke lever, and press the decompression valve.
Pull the large pulley easy-start system handle steadily and firmly to ignite the engine ( $\le 7$ seconds cold response).
Allow the engine to idle and warm up briefly before beginning formal cutting procedures.

Proper Cutting Posture & Material Execution

Maintain a stable, well-balanced stance. Grip the handles firmly and align the saw blade vertically with the marked cutting position.
Feed the blade smoothly at a uniform speed. Do not force or press the saw down hard during operation; let the high-torque engine and matched grinding wheel do the work.
Cut steel, concrete, wood, and aluminum moderately, ensuring the rotatable guard is correctly angled to block discharging debris.

Personal Safety Protection

All operators must wear full personal protective equipment (PPE), including a certified safety helmet, high-impact goggles/face shield, heavy-duty protective gloves, ear defenders, and steel-toed work boots. Avoid contact with flying sparks.

Real-Time Diagnostics & Post-Operation Care

Continually monitor machine vibration, running noise, and power delivery. Stop operation immediately if you notice abnormal failure, loose parts, or sudden speed drops.
After finishing the cut, release the throttle trigger, turn off the engine switch, and allow the wheel to stop rotating completely before setting the machine down.
Clear away concrete dust, slurry, and metallic filings from the blade guard, cylinder cooling fins, and body. Store the portable cutting saw in a dry, secure indoor environment.

About XINGHU

30+ Years of Engineering Authority: Founded in 1995, XINGHU stands as a tier-one manufacturing powerhouse and China's national standard-setting unit for fan technology, specializing in commercial-grade outdoor power solutions.
Streamlined Vertical Infrastructure: Driven by over 100 industrial experts, our 4-floor vertical production facility integrates a senior technical consulting division, dedicated R&D engineers, and a global trade fleet.
Industrial Flaw-Elimination Matrix: Operating under strict ISO9001 protocols, we enforce the "Three No-Pass Principles" and destructive load testing across all assembly lines to ensure zero-compromise field stability.
Elite Component Sourcing: To guarantee extended equipment lifecycles, our premium lawn maintenance machines are powered exclusively by genuine Honda, Loncin, and Zongshen commercial engines.
Rapid Customs Integration: Backed by authoritative CE, EPA, EURO5, GSG, and ASF certifications, our low-fatigue, precision-welded export inventory ensures immediate market entry and complete B2B lifecycle part traceability.