SB43 Hydraulic Breaker
The SB43 is a heavy-duty medium-class hydraulic breaker for 8–14 ton excavators, delivering superior impact energy for hard rock, reinforced concrete, and demanding demolition work.
Impact Energy
700–1000 J
Impact Rate
550–850 bpm
Operating Weight
380–460 kg
Chisel Diameter
85 mm
Overview
The SB43 represents the upper end of the medium breaker class, designed specifically for applications where the SB40 is insufficient — hard rock formations, heavily reinforced concrete, and high-production demolition projects. The SB43's 700–1000 J impact energy and 85mm chisel diameter provide a meaningful step up in breaking capability over the SB40.
Engineered for the 8–14 ton excavator class, the SB43 is compatible with some of the most widely deployed construction excavators in the world. The higher hydraulic flow requirement (70–100 L/min) and working pressure (140–175 bar) mean the SB43 demands more from the carrier's hydraulic system, but delivers proportionally greater productivity in return.
The SB43 is particularly valued in quarry and mining applications for secondary rock breaking, where consistent high-energy impacts are required to reduce blasted rock to manageable sizes. Its robust construction and proven reliability in these demanding environments have made it a preferred choice for operators who need dependable performance over long operating cycles.
Technical Specifications
| Model | SB43 |
| Weight Class | Medium |
| Compatible Excavators | 8–14 ton |
| Impact Energy | 700–1000 J |
| Impact Rate | 550–850 bpm |
| Operating Weight | 380–460 kg |
| Required Oil Flow | 70–100 L/min |
| Working Pressure | 140–175 bar |
| Chisel Diameter | 85 mm |
Applications
Key Strengths
- Higher impact energy than SB40 for tougher materials
- Larger chisel diameter for better energy transfer in hard rock
- Suitable for the popular 10–14 ton excavator class
- Robust design for demanding quarry and mining applications
- Good parts availability globally
Operating Recommendations
Pre-heat hydraulic oil to operating temperature before starting in cold weather
Use a moil point chisel for hard rock, flat chisel for concrete slabs
Avoid side loading — keep breaker aligned with the work direction
Limit continuous operation to 30 seconds before repositioning
Maintenance Guidelines
Grease every 2 hours — use only manufacturer-specified grease
Check nitrogen pressure every 100 hours — target 10–12 bar cold
Inspect tie rod torque every 200 hours
Check front head wear ring clearance every 300 hours
Recommended Maintenance Guides for the SB43
Brands That Make This Class
Multiple manufacturers produce breakers equivalent to the SB43 class.
South Korea / China · Est. 1981
Volume manufacturer with facilities in South Korea and China — broad SB-series range
View ProfileJapan · Est. 1875
Japanese precision engineering with 150-year rock drill heritage
View ProfileSweden · Est. 1873 (as Atlas Copco); 2018 (as Epiroc)
Swedish engineering leader — formerly Atlas Copco hydraulic attachments
View ProfileJapan · Est. 1875
Japanese century-old rock drill heritage — precision breakers for demanding applications
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