SB40 Hydraulic Breaker
The SB40 is a medium-class hydraulic breaker for 6–12 ton excavators, offering high impact energy for general construction, rock breaking, and concrete demolition.
Impact Energy
600–900 J
Impact Rate
600–900 bpm
Operating Weight
320–400 kg
Chisel Diameter
80 mm
Overview
The SB40 is a workhorse of the medium breaker class, engineered for the 6–12 ton excavator segment that dominates general construction and civil engineering projects worldwide. With 600–900 J of impact energy and an 80mm chisel diameter, the SB40 delivers genuine rock-breaking capability across a wide range of geological and construction conditions.
The SB40's design reflects decades of hydraulic breaker evolution — the 320–400 kg operating weight provides the ground reaction mass needed for efficient energy transfer, while the hydraulic circuit design ensures consistent performance across the full operating range of compatible excavators.
In the 6–12 ton class, the SB40 is commonly paired with Caterpillar 308–312, Komatsu PC88–PC130, Hitachi ZX85–ZX130, Volvo EC80–EC140, Doosan DX85–DX140, and Hyundai R80–R140 series excavators. Its versatility makes it suitable for everything from urban demolition to quarry secondary breaking.
Technical Specifications
| Model | SB40 |
| Weight Class | Medium |
| Compatible Excavators | 6–12 ton |
| Impact Energy | 600–900 J |
| Impact Rate | 600–900 bpm |
| Operating Weight | 320–400 kg |
| Required Oil Flow | 60–90 L/min |
| Working Pressure | 130–170 bar |
| Chisel Diameter | 80 mm |
Applications
Key Strengths
- High impact energy for the medium class
- Versatile across a wide range of applications
- Compatible with the most common 10–12 ton excavator segment
- Strong productivity in rock and concrete
- Robust construction for demanding job sites
Operating Recommendations
Ensure excavator hydraulic flow is within the specified range before operation
Use the auto-stop feature (if equipped) to prevent blank firing
Rotate the chisel 90° every 2 hours to ensure even wear
Keep the breaker perpendicular to the work surface — max 5° deviation
Maintenance Guidelines
Grease every 2 hours in normal conditions, every 1 hour in dusty environments
Check nitrogen pressure every 100 operating hours
Inspect piston and cylinder bore every 500 hours
Replace all seals as a complete set during major overhaul
Recommended Maintenance Guides for the SB40
Brands That Make This Class
Multiple manufacturers produce breakers equivalent to the SB40 class.
South Korea / China · Est. 1981
Volume manufacturer with facilities in South Korea and China — broad SB-series range
View ProfileSweden · Est. 1873 (as Atlas Copco); 2018 (as Epiroc)
Swedish engineering leader — formerly Atlas Copco hydraulic attachments
View ProfileFinland · Est. 1978
Finnish-engineered premium breakers — now part of Sandvik
View ProfileFinland · Est. 1978
Finnish precision engineering — high-frequency heavy-duty breakers
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