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SB81A Hydraulic Breaker Rock Breaker Box Type for 18-26 Ton Excavator With 140mm Chisel
SB81A Hydraulic Breaker Rock Breaker Box Type for 18-26 Ton Excavator With 140mm Chisel
SB81A Hydraulic Breaker Rock Breaker Box Type for 18-26 Ton Excavator With 140mm Chisel
SB81A Hydraulic Breaker Rock Breaker Box Type for 18-26 Ton Excavator With 140mm Chisel
SB81A Hydraulic Breaker Rock Breaker Box Type for 18-26 Ton Excavator With 140mm Chisel
SB81A Hydraulic Breaker Rock Breaker Box Type for 18-26 Ton Excavator With 140mm Chisel
Specifications
Brand Name :
SEWOOMIC
Model Number :
SB81 / GCB220
Certification :
CE / ISO9001
Place of Origin :
China
MOQ :
1
Price :
Negotiable
Payment Terms :
L/C,T/T
Supply Ability :
100 units/month
Delivery Time :
20-25 days
Packaging Details :
Wooden Box
Suitable Excavator :
18-26 Ton
Operating Weight :
1978kg
Working Flow :
120-180 L/min
Setting Pressure :
210-230 Bar
Operating Pressure :
160-180 Bar
Impact Energy :
4067J
Impact Rate :
350-500
Hose Diameter :
1 Inch
Noise Level :
118 DB
Tool Diameter :
140mm
Warranty :
1 Year
Description

SB81A Silent Box Type Nitrogen Hydraulic Breaker – Professional Product Introduction for 18–26 Ton Excavators

About Guchuan Machinery Co., Ltd.

Established in 2010 and based in Changzhou, Jiangsu, China, Guchuan Machinery Co., Ltd. is a professional manufacturer and supplier focused on high‑quality hydraulic breakers, hydraulic hammers, rock breakers, and demolition attachments for construction machinery. As an experienced B2B enterprise serving the global market, we maintain long‑term, stable strategic cooperation with many world‑famous brands of construction machinery manufacturers and hydraulic breaker producers. Our core competitiveness lies in independent R&D, precision manufacturing, stable quality control, and customized solutions for global distributors, rental companies, construction contractors, and engineering enterprises.
We provide a complete product lineup covering small, medium, heavy‑duty, and ultra‑heavy‑duty hydraulic breakers. Our standard models include:
SB10 / GCB30, SB20 / GCB40, SB30 / GCB50, SB35 / GCB53, SB40 / GCB60, SB43 / GCB75, SB45 / GCB85, SB50 / GCB100, SB60 / GCB190, SB70 / GCB210, SB81 / GCB220, SB100 / GCB280, SB121 / GCB320, SB131 / GCB350, SB140 / GCB360, SB151 / GCB400;
MS550 / GHB120, MS600 / GHB130, MS700 / GHB140, MS800 / GHB160;
HB15G / GCB180, HB20G / GCB200, HB30G / GCB300, HB40G / GCB330;
MB1500 / NB1500.
We also produce customized ultra‑heavy‑duty breakers with tool diameters of 175 mm, 195 mm, 200 mm, 205 mm, and 210 mm for large‑scale mining, quarrying, and heavy demolition projects.
Guchuan Machinery owns independent intellectual property rights and strong capabilities in developing auto‑variable frequency pure hydraulic breakers and nitrogen‑assisted hydraulic breakers. All products are manufactured under strict quality management systems to ensure high performance, reliability, durability, and cost‑effectiveness for global customers.

Product Overview: SB81A Silent Box Type Nitrogen Hydraulic Breaker

The SB81A silent box type nitrogen hydraulic breaker is a mid‑to‑heavy‑class hydraulic hammer designed for 18–26 ton excavators. It integrates advanced hydraulic technology, nitrogen energy storage technology, fully enclosed silent box structure, anti‑vibration design, and precision machining. This product is engineered for urban construction, municipal maintenance, building renovation, landscaping, farmland water conservancy, road & traffic engineering, and industrial site reconstruction.
As a professional hydraulic breaker manufacturer, Guchuan Machinery designed the SB81A to solve common pa-in points in construction: high noise, strong vibration, limited working space, insufficient impact energy, low working efficiency, high failure rate, and difficult maintenance. The SB81A delivers stable power, low noise, strong adaptability, easy operation, and long service life, making it a top choice for global construction customers.

SB81A Hydraulic Breaker Rock Breaker Box Type for 18-26 Ton Excavator With 140mm Chisel

Parameter

Light Weight Range Hydraulic Breaker
Model No. Chisel Diameter (mm) Excavator Weight (ton) Body Weight (kg) Working Flow Rate (L/min) Working Pressure (Bar) Impact Rate (bpm)
SB10/GCB40 40 0.8-2.5 73 15-30 90-120 800-1400
SB20/GCB45 45 1.2-3.0 100 20-40 90-120 700-1200
SB30/GCB50 53 2.5-4.5 120 20-50 90-120 500-900
SB40/GCB60 68 4.0-7.0 298 40-70 110-140 400-800
Medium Weight Range Hydraulic Breaker
SB43/GCB75 75 6.0-9.0 375 50-90 120-150 400-800
SB50/GCB100 100 11-16 890 80-110 150-170 350-700
SB81/GCB22O 140 18-26 1754 120-180 160-180 350-500
SB81A/GCB220 140 18-26 1773 120-180 160-180 350-500
HB20G/GCB200 135 18-25 1680 125-150 160-180 400-800
Large Weight Range Hydraulic Breaker
SB121/GCB320 155 28-35 2555 180-240 160-180 300-450
SB131/GCB350 165 35-43 3065 200-260 160-180 250-400
HB30G/GCB300 150 25-30 2305 160-190 160-180 350-700
GCB500 195 50-60 5350 245-290 230-250 100-150
GCB650 210 65-100 7200 290-340 250-270 90-130

Working Principle & Technical Features


The SB81A adopts a nitrogen‑hydraulic composite power system, which is the core technical advantage of Guchuan Machinery.

1. Nitrogen Energy Storage & Recovery System


The rear chamber is filled with high‑pressure nitrogen. During the piston recoil stroke, nitrogen is compressed and stores energy. During the downward stroke, hydraulic pressure and nitrogen expansion energy act on the piston simultaneously, greatly improving impact energy and impact frequency. This design reduces hydraulic oil demand, lowers energy consumption, reduces heat generation, and protects the excavator hydraulic system.

2. Fully Enclosed Silent Box Structure


The fully enclosed box shell with built‑in sound‑absorbing and shock‑absorbing materials effectively isolates noise and absorbs vibration. The noise level is controlled at 118 dB, meeting urban environmental protection standards and allowing daytime and nighttime construction in noise‑sensitive areas.

3. Pure Hydraulic & Auto‑Variable Frequency Control


With independent R&D of auto‑variable frequency technology, the breaker automatically adjusts impact frequency according to material hardness (soft soil, concrete, rock). It maintains stable impact energy, avoids empty firing, reduces component wear, and improves construction safety.

4. High‑Strength Material & Precision Machining


Key components such as piston, cylinder, front head, tool bushing, and control valve are made of high‑strength alloy steel (40CrMo, 42CrMo) through precision forging, heat treatment, and grinding. This ensures high wear resistance, pressure resistance, and long service life under heavy load.

5. Anti‑Blank Firing & Overload Protection


The built‑in anti‑blank firing system prevents piston damage when the tool is not in contact with the material. Overload pressure protection avoids breakdowns caused by excessive system pressure, improving stability and reducing maintenance costs.

6. Easy Maintenance & Long Service Life


The modular design simplifies seal replacement, tool changes, and daily inspections. High‑quality oil seals and wear components extend service intervals and reduce downtime.


Product Advantages Compared to Ordinary Hydraulic Breakers


1. Ultra‑Low Noise & Vibration


Fully enclosed silent box reduces noise by 15–25 dB compared with open‑type breakers. Low vibration protects the excavator arm and improves operator comfort.

2. Strong & Stable Impact Energy


At 4067 J, the SB81A efficiently breaks reinforced concrete, medium‑hard rock, asphalt, and hardened soil. Nitrogen assistance ensures consistent power without hydraulic fluctuations.

3. Wide Adaptability to 18–26 Ton Excavators


Matches most brands: CAT, Komatsu, Hitachi, Kobelco, Doosan, Hyundai, LiuGong, XCMG, SANY, etc. Simple installation and debugging.

4. Energy Saving & High Efficiency


120–180 l/min oil flow matches medium excavators, reducing fuel consumption. 350–500 Bpm impact rate improves efficiency by 20–30% in municipal and renovation projects.

5. Heavy‑Duty Durability & Low Failure Rate


High‑strength components, advanced heat treatment, and strict assembly ensure stable performance in harsh conditions.

6. Safe & User‑Friendly Design


Anti‑blank firing, overload protection, and low vibration enhance safety for indoor, underground, and urban worksites.


Main Application Fields & Scenarios


The SB81A silent box type nitrogen hydraulic breaker is widely used in many fields with strict requirements for noise, space, vibration, and construction precision.

1. Municipal & Public Facility Maintenance


Sidewalk & Small‑Area Road Repair: Break concrete sidewalks, curbs, and damaged asphalt for patch repair.

Pipeline & Cable Trench Excavation: Break hardened soil and shallow rock for utility trenches.

Pipeline & Drainage Construction: Demolish concrete drainage ditches, pipe wells, and septic tanks; clear hardened blockages.

Urban Greening & Landscape Renovation: Break old flower beds, retaining walls, and small concrete foundations (light poles, billboards).


2. Building Decoration & Renovation


Interior & Exterior Wall Reconstruction: Demolish non‑bearing walls, concrete partitions, and widen door/window openings.

Floor & Tile Removal: Break bathroom/kitchen floor layers and old terraces without structural damage.

Small Foundation Demolition: Break equipment bases, steps, and canopy foundations.

Basement Local Demolition: Suitable for confined underground spaces.

Decoration Grooving & Drilling: Wall chases for pipelines with controlled vibration.


3. Landscaping & Farmland Water Conservancy


Rock Breaking & Land Leveling: Break field boulders and weathered rock for land preparation.

Tree Pit Excavation: Suitable for hard soil and soft rock.

Ditch & Pond Renovation: Break hardened ditch linings and repair small dams.


4. Traffic & Road Auxiliary Engineering


Highway Local Maintenance: Break guardrail foundations and bridge deck damage.

Tunnel Minor Repair: Compact size for narrow tunnel spaces.

Railway Maintenance: Clear track bed hardened blocks and repair drainage ditches.


5. Industrial & Commercial Sites


Factory Floor Renovation: Break old workshop concrete floors for replacement or grooving.

Equipment Demolition & Cleaning: Break small production line foundations and storage tank bases.


In all these scenarios, the SB81A provides high efficiency, low noise, low vibration, and safe construction.


Why Choose Guchuan Machinery SB81A Hydraulic Breaker?


  1. Professional Manufacturer Experience: Established 2010, focused on hydraulic breakers, deep industry expertise.
  2. Complete Product Range: Full series from small to ultra‑heavy duty, one‑stop procurement.
  3. Independent R&D Capability: Auto‑variable frequency pure hydraulic & nitrogen technology, stable performance.
  4. Strict Quality Control: High‑strength materials, precision machining, reliable quality.
  5. Global Cooperation & Recognition: Partner with world‑famous brands, products sold worldwide.
  6. Professional B2B Service: Customization, technical support, after‑sales, spare parts supply.
  7. Cost‑Effective Solution: High performance, long life, low maintenance, high return on investment.
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SB81A Hydraulic Breaker Rock Breaker Box Type for 18-26 Ton Excavator With 140mm Chisel

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Product Detail
Brand Name :
SEWOOMIC
Model Number :
SB81 / GCB220
Certification :
CE / ISO9001
Place of Origin :
China
MOQ :
1
Price :
Negotiable
Contact Supplier
video
SB81A Hydraulic Breaker Rock Breaker Box Type for 18-26 Ton Excavator With 140mm Chisel
SB81A Hydraulic Breaker Rock Breaker Box Type for 18-26 Ton Excavator With 140mm Chisel
SB81A Hydraulic Breaker Rock Breaker Box Type for 18-26 Ton Excavator With 140mm Chisel

Jiangsu Guchuan Machinery Co., Ltd.

Verified Supplier
1 Years
changzhou
Since 2011
Business Type :
Manufacturer
Main Products :
Hydraulic Hammer, Hydraulic Breaker, Hydraulic Breaker Hammer
Employee Number :
>180
Certification Level :
Verified Supplier
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