Long Arm Excavator Arm with Bucket and cylinder for KOBELCO Hitachi
Two Section 40-47T Excavator Stick Extension Long Reach
18 Meters with Bucket Excavator Dipper Arm
Product Presentation of Excavator Boom
Optimized Excavator Boom Design for Heavy-Duty Performance
The excavator boom is fabried from high-strength Q355B steel, delivering exceptional durability and structural stability. The extension arm sleeve utilizes 45# steel as the base material, further reinforced with a 40Cr bushing lining to improve wear resistance and prolong component lifespan.
To reduce shear stress generated by repeated shaft-sleeve rotation, a butter grease lubriion system is integrated, effectively minimizing friction and enhancing longevity.
A standout innovation in this design is the hydraulically driven extension arm, strategically positioned between the body support and working arm. Powered by dedied oil cylinders, it works in synchronization with the bucket cylinder to maximize operational efficiency and power output.
The system features dual control interfaces (both inside and outside the cockpit), allowing independent operation of each hydraulic cylinder set for precise, responsive maneuvering.
Ideal for Demanding Environments:
Mining & quarrying operations
Port logistics & bulk material handling
Emergency flood control & disaster rescue missions
This cutting-edge design marks a significant leap in excavator technology, offering unmatched performance, durability, and reliability in the most challenging working conditions.
| Material Use | Q345B, Q550D, can also be customized to customer requirements |
| Product Warranty Period | 6 months,9 months,1 Year |
| Product Size | Most lengths can be 34M, According to customer requirements, Any excavator model |
Advantages of Zhonghe Excavator Long Arm
Using high quality materials, such as Q355B as default, Q690D optional, Niningbo connectors, seamless precision pipelines, graphite alloy copper sleeve, and strong but light bucket cylinder.
Built-in reinforcing ribs. Professional welding skills towards the different bearing positions. Groove preparation(45° edge-mining) before welding.
Hole drilling tolerance is within 5-10um, ensure accuracy.
Customization Options
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Universal Compatibility: Fits all major excavator brands.
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Tailored Solutions: Customize color, length, and material to your specifiions.
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Enhanced Functionality: Additional hydraulic pipelines available for specialized appliions.
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Complete Packages: Optional supply of boom cylinders and stick cylinders upon request.
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Production Capacity
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Monthly Output: 50+ sets of excavator booms.
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Annual Capacity: 600+ sets of various boom arm types.
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Customer-Centric Service
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24/7 Online Support: Prompt assistance within 24 hours.
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Expert Technical Guidance: Video consultations with our 10+ years experienced engineers.
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Cost-Efficient Shipping: Multi-piece design for long booms to optimize container space and reduce freight costs.
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Warranty Coverage
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Long Reach Boom: 1 year
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Cylinder & Linkage: 180 days
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Bucket: 90 days
All parts you needed are included.
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Excavator long boom
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Excavator long arm
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Standard bucket
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Linkage kit
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Bucket cylinder
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Butter hose
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Pin
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Lubriing system
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Seals
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Specifiion of Excavator Boom Arm
Weight |
Model |
Part Length |
Total length(m) |
Weight(kg) |
Maximum removal height(m) |
| Total Length(mm) | 25T | 8.5 | 16 | 2800 | 16M |
| Boom(A)(mm) | 2.3 | 900 | |||
| Arm(b)(mm) | 5.2 | 1700 | |||
| Maximum Digger Radius(C)(mm) | 30T | 9.5 | 18 | 3000 | 18M |
| Maximum Digger Depth(C)(mm) | 2.3 | 1000 | |||
| Maximum Unloading Height(E)(mm) | 5.2 | 1950 | |||
| Maximum Digger Height(F)(mm) | 35T | 10.5 | 20 | 3500 | 20M |
| Bucket Volume(m³) | 2.3 | 1100 |
Company Strength
Kaiping Zhonghe Machinery Manufacturing Co., Ltd. is a leading integrated manufacturer and supplier specializing in customized excavator boom arms and attachments. With a modern 14,000 m² standardized steel structure workshop and advanced high-precision machining equipment, we combine cutting-edge technology with a highly skilled workforce to deliver superior products.
Our team comprises:
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60+ seasoned technical experts
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30+ certified welders with 7+ years of experience
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15+ senior designers
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A dedied R&D team driving innovation
With an annual production capacity of 600+ excavator boom arms, we offer high-quality, competitively priced solutions trusted in 40+ countries worldwide.
Guided by our core values—"Excellence in Quality, Integrity in Management, and Commitment to Customer Satisfaction"—we welcome global partners to collaborate and grow with us.
FAQ of excavator long arm
A1: First, the whole long arm is lengthening, but the boom just lengthening from its middle sleeve to its end, so the original boom and stick cylinder can be used. Second, using the original parts can save you cost.
A2. Generally speaking, the 30-40 excavator longest arm suggests to be 8 meters, and can configure 0.1 cbm bucket, with no need for an extra counterweight. 55 excavator's longest arm suggests to be 12 meters, which can configure 0.1-0.15 cbm bucket, which needs 0.5 ton extra counterweight. 60-80 excavator longest arm suggests to be 12 meters, can configure 0.15-0.25 cbm bucket, need 0.5-0.7 ton extra counterweight.
It is not recommended to extend boom arm to longes the t length as mini excavator is easy to slosh.
Usually disconnecting the original boom arm, stick cylinder, then pin the new one is okay.
Kindly remind, use to prepare several containers to fill the oil before disassembling.
Click here to contact Katherine for discounts
Whatsapp: +86 18127538971
Email: Katherine@excavatorboomarm.com
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.