SB81 Side Type Hydraulic Breaker Triangular Hammer for 20-25t Excavator, Heavy Duty

Product Features

• Triangular Side-Type Housing: Compact, low-profile design improves visibility and allows breaking close to walls, trenches, and confined areas.

• 135mm Chisel Compatibility: Accepts moil point, flat, and blunt chisels for concrete, rock, asphalt, and trenching work.

• Direct Pin-On Mounting: Standard side bracket matches most 20–30 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 SB81 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 Applications

• Urban Demolition: Breaking concrete foundations, walls, and slabs in tight areas.

• Road & Pavement Works: Opening asphalt and concrete surfaces for repair.

• Quarry & Mining: Secondary breaking of oversize boulders.

• Trenching & Excavation: Cutting through hardpan, frozen ground, and light rock.

• Tunneling & Underground: Low-profile breaking in confined spaces.

• Ideal Carriers: CAT 320/323, Komatsu PC200/PC220, Hitachi ZX200/ZX220, Volvoooo EC210/EC220, Doosan DX220/DX225, and similar 20–30 ton excavators.

Product Advantages

• Versatile Compatibility: Fits a wide range of 20–30 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 compact housing minimize fatigue.

• Quick Installation: Side pin-on design enables one operator to install or remove the breaker quickly.

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

Manufacturing Process

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

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

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

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

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

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

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

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

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

FAQ – SB81 Side Type Hydraulic Breaker

Q1: Will the SB81 fit my excavator?
The SB81 side type breaker is designed for excavators weighing 20–30 tons with auxiliary hydraulic flow of 120–150 L/min and working pressure between 160–180 bar. If your machine falls within this range and uses a standard side 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 135mm diameter for the SB81.

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 SB81 is 15–17 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 SB81 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 SB81’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.