SB20 Hydraulic Breaker
The SB20 is a versatile mini-class hydraulic breaker for 2–6 ton excavators, offering more impact energy than the SB10 while remaining compact for urban and confined-space applications.
Impact Energy
250–400 J
Impact Rate
800–1100 bpm
Operating Weight
130–170 kg
Chisel Diameter
55 mm
Overview
The SB20 occupies the upper end of the mini breaker class, designed for excavators in the 2–6 ton range. It delivers meaningfully more impact energy than the SB10 — 250–400 J versus 150–250 J — while maintaining the compact profile needed for urban construction, utility work, and applications where machine access is restricted.
The SB20's 55mm chisel diameter and increased operating weight (130–170 kg) make it suitable for medium-duty concrete breaking, harder rock formations, and applications where the SB10 would be underpowered. The hydraulic flow requirement of 30–50 L/min is compatible with the auxiliary circuits of most 2–6 ton excavators without modification.
In the 2–6 ton excavator class, the SB20 is commonly paired with machines such as Kubota KX040–KX057, Yanmar SV40–SV60, Takeuchi TB250–TB260, Bobcat E35–E55, and Caterpillar 302–303 series. Its versatility makes it one of the most widely used breaker sizes in urban construction markets globally.
Technical Specifications
| Model | SB20 |
| Weight Class | Mini |
| Compatible Excavators | 2–6 ton |
| Impact Energy | 250–400 J |
| Impact Rate | 800–1100 bpm |
| Operating Weight | 130–170 kg |
| Required Oil Flow | 30–50 L/min |
| Working Pressure | 110–150 bar |
| Chisel Diameter | 55 mm |
Applications
Key Strengths
- Versatile mid-mini class — bridges gap between SB10 and SB30
- Higher impact energy than SB10 for tougher materials
- Still compact enough for urban and confined work
- Wide carrier compatibility in the 2–6 ton class
- Good balance of power and portability
Operating Recommendations
Match hydraulic flow to the lower end of the range for longer service life
Use a blunt chisel for concrete, pointed chisel for rock
Avoid continuous operation exceeding 20 seconds without repositioning
Ensure carrier relief valve is set correctly before operation
Maintenance Guidelines
Grease every 2–3 hours of operation
Check nitrogen pressure every 50 operating hours
Inspect front head and chisel bushing for wear monthly
Flush hydraulic circuit when replacing seals
Recommended Maintenance Guides for the SB20
Brands That Make This Class
Multiple manufacturers produce breakers equivalent to the SB20 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 ProfileJapan / USA · Est. 1967
Japanese-engineered breakers with strong North American distribution
View ProfileJapan · Est. 1875
Japanese century-old rock drill heritage — precision breakers for demanding applications
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