SB43 Rock Breaker Attachment – 68mm Chisel for 6-9 Ton Excavator Heavy Duty

Product Features

• Compact Yet Powerful: Low-profile housing improves visibility and allows breaking close to walls, trenches, and confined areas.

• 68mm Chisel Compatibility: Accepts moil point, flat, and blunt chisels for concrete, rock, asphalt, and trenching work.

• Direct Pin-On Mounting: Standard top bracket matches most 6–9 ton excavator quick couplers for fast, single-operator installation.

• Internal Accumulator: Nitrogen-charged accumulator smooths hydraulic pulses and boosts strike energy for consistent performance.

• Replaceable Front Bushing: Quick-change lower bushing protects the front head and maintains chisel alignment.

• Low-Vibration Design: Integrated damping reduces feedback to the carrier and operator, improving comfort and safety.

Product Technology

The SB43 is manufactured using advanced CNC machining and precision heat treatment. The cylinder bore is diamond-honed to a mirror finish, reducing internal leakage and friction. The piston is forged from high-grade alloy steel and induction hardened to HRC 58–62, providing exceptional wear resistance and fatigue strength. The accumulator diaphragm is made from high-temperature resistant elastomer, tested for millions of cycles. All critical seals are sourced from premium brands to guarantee leak-free operation.

Product Advantages

• Versatile Compatibility: Fits a wide range of 6–9 ton excavators without modification kits.

• Exceptional Durability: Hardened piston, honed cylinder bore, and premium seals deliver long service before rebuild.

• Reduced Operating Costs: Efficient nitrogen-assisted design requires less hydraulic flow, reducing fuel consumption and heat.

• Operator Comfort & Safety: Low-vibration operation and noise-dampened housing minimize fatigue.

• Quick Installation: Pin-on design enables one operator to install or remove the breaker in under 10 minutes.

• Proven Field Performance: Trusted by contractors and rental fleets worldwide.

Manufacturing Process 

Raw Material Inspection: High-grade alloy steel billets and castings are spectrographically tested for composition and internal defects.

1. CNC Precision Machining: Piston, cylinder, valve chambers, and front head are machined to micron-level tolerances.

2. Heat Treatment: Critical surfaces undergo induction hardening or carburizing to achieve target hardness and wear resistance.

3. Honing & Lapping: Cylinder bore is diamond-honed to Ra 0.2–0.4 μm surface finish, ensuring minimal friction and long seal life.

4. Cleanroom Assembly: All components are assembled in a dust-free, climate-controlled environment.

5. Nitrogen Charging & Leak Testing: Accumulator is pre-charged with nitrogen and subjected to rigorous leak-down tests.

6. Performance Bench Testing: Every unit is tested on a hydraulic test bench to verify impact rate, operating pressure, and flow specifications.

7. Industrial Painting: High-adhesion anti-corrosion coating is applied for long-lasting protection.

8. Export Packaging: Securely packed in fumigated plywood crates with desiccant and rust-preventive wrapping for safe ocean transport.

FAQ 

Q1: Will the SB43 fit my excavator?
The SB43 is designed for excavators weighing 6.0–9.0 tons with auxiliary hydraulic flow of 50–80 L/min and working pressure between 120–160 bar. If your machine falls within this range and uses a standard pin-on coupler, it should be a direct fit. Contact us with your excavator make and model for a confirmed compatibility check.

Q2: What type of chisel should I use?
For penetrating hard rock and reinforced concrete, use a moil point chisel. For breaking softer, layered materials like asphalt, brick, or concrete slabs, choose a flat (blunt) chisel. Both types are available in 68mm diameter for the SB43.

Q3: How often should I grease the chisel?
Apply high-quality chisel paste every 2 hours of breaker operation, or every hour in dusty or abrasive conditions. Always press the chisel firmly against the ground while greasing to force fresh lubricant into the bushing contact area.

Q4: What nitrogen pressure should I maintain?
The correct nitrogen pre-charge for the SB43 is 14–16 bar. Check the accumulator pressure weekly using a dedicated nitrogen gauge. Low nitrogen pressure causes weak impact and slow blow frequency; high pressure can cause erratic operation and damage internal components.

Q5: Can the SB43 be used underwater?
The chisel tip may work in shallow water, but the breaker body must never be submerged. Water ingress will immediately damage seals and internal components. For continuous underwater demolition, a specialized submersible hammer is required.

Q6: What causes oil overheating when using the breaker?
Overheating typically results from operating the breaker at hydraulic flow or pressure higher than specified, a clogged filter in the excavator’s hydraulic system, or a stuck valve in the breaker circuit. Always match the excavator’s auxiliary settings to the SB43’s rated range and replace filters regularly.

Q7: How do I store the breaker when not in use?
Store the breaker upright with the chisel lightly pressed against a wooden block. Release all hydraulic pressure, cap the hoses, and apply a generous coat of grease to the chisel to prevent rust. If outdoor storage is necessary, cover with a waterproof tarp and ensure the breaker is not sitting in water.