Product Description

Excavator Long Reach Boom And Arm



(2)Working Dimension:

  Excavator tonnage T 20-25t 30-36T 40-47T
  Total length mm 15200 18000 18000 20000 22000 20000 22000 24000
  Max CHINAMFG radius mm 15000 17300 17300 19200 21000 19200 21000 23000
  Max cut depth mm 10300 12500 12600 14500 16000 14500 16000 17000
  Max cut depth vertically mm 9500 11600 11700 13600 15200 13600 15200 16200
  Max cut height mm 12600 15300 15300 17300 18500 16200 17500 18750
  Max unloading height mm 10300 13000 13000 15000 16000 14000 15000 16000
  Min rotate radius mm 4750 5100 5100 6200 6200 6200 7750 7750
  Boom length mm 9100 10500 10500 11500 12500 11500 12500 13350
  Stick length mm 6100 7500 7500 8500 9500 8500 9500 10650
  Stick max cut force(ISO) KN 83 65 118 95 80 170 139 109
  Bucket max cut force(ISO) KN 150 99 153 153 153 153 153 153
  Bucket capacity m3 0.5 0.4 1.2 0.7 0.5 1 0.8 0.7
  Bucket rotate degree deg 170 170 170 170 170 170 170 170
  Folding length mm 13000 14500 15000 16000 17000 16000 17000 18000
  Folding heigtht mm 3050 3100 3300 3350 3400 3450 3480 3500
  Extra Counter weight T 1 3.5 4 5 6 5 6 8



  1. )The material used in the excavator long arm is Q355B
  2. )If other steel is required, please contact us, Q690D customized service

2.Material processing

Use a plasma cutter to ensure part flatness

3.Internal vie

Spaced by vertical and horizontal reinforcement plate at regular interval

4.Product making

A.) Welded with mixed gas between argon and carbon dioxide. Argon content:80%.Carbon dioxide content:20%.
B.) Welded by auto-welding machine .
A.) The surface of the workpiece can obtain a certain degree of cleanliness and different roughness, so that the mechanical properties of the workpiece surface are improved, thus improving the fatigue resistance of the workpiece, increasing the adhesion between it and the coating, and prolonging the coating film. Durability, also good for paint leveling and decoration.
5.Product packaging and Shipping

6.Company Services

1, Long reach boom are use for dredging rivers port construction, railway construction and groundwork construction, with high extensive operation scope, high efficiency and high security.
2, Our company was founded in 2008 with more than 10 years of experience, production line engineers have more than 10 years of data and experience for all brands of excavators designed and customized long range booms.
3, Applicable for all the excavator model,OEM service is also available.
4, Advanced manufacturing process, Technique is in the line with global standards.
5, We have all the installation dimensions of most excavator, we can customize this long reach boom for your excavator.
6, Before welding, we have use big edge milling machine mill(taper process) the edge of the sheet. So the welding can go to the internal of the steel-sheet and make the structure have higher performance. Also the inside have strength plate make it more stronger.
7, If necessary, extra pipeline can be added to suit to some extra application.
8, Stick cylinder of the long boom, can use your original stick cylinder to save the cost, if you need the stick cylinder, we also can prepare for you.
9, Some parts can be consolidated using thicker plate or overlapping another plate  for heavy-duty application.
10, Welding is protective-gas welding, the protective gas is 80% Argon and 20% CO2 mixed. This is CHINAMFG standard for protective gas. 
11, Before welding, we have use big edge milling machine mill the edge of the sheet. So the welding can go to the internal of the steel-sheet and make the structure have higher performance.
12 .We can customize the arm for all kinds of excavator as per your request. Just let me know your request. 
13. If you need, some parts can be consolidated using thicker plate or overlapping another plate for heavy-duty application, just let me know.
 14. Not make the bucket for this extender arm as customer request. But if you need us prepare the bucket for you, that’s ok.

MODEL LDB120 LDB200-1 LDB200-2 LDB300 LDB350-1 LDB350-2 LDB450
boom length(mm) 7100 8220 10000 10000 11000 12000 13000
arm length ( mm) 5900 7160 8000 8000 9000 10000 11000
Weight(kg) 3000 4000 4200 5200 6000 6500 7000
Max dig depth(mm) 9000 11340 12200 12200 14500 16100 18000
Max. extensive scope(mm) 12500 15100 17600 17600 19600 21600 23600
Max. dig height(mm) 11300 12510 13500 13720 14920 16100 17300
folding height(mm) 2900 2980 3040 3210 3210 3400 3400
bucket capacity(m3) 0.3 0.5 0.4 0.4 0.5 0.6 0.6
Suit Excavator tonnage(ton) 12 20 20 30 35 35 45


Warranty: 180 Day
Application: Excavator
Certification: ISO9001: 2015


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Shipping Cost:

Estimated freight per unit.

about shipping cost and estimated delivery time.
Payment Method:


Initial Payment

Full Payment
Currency: US$
Return&refunds: You can apply for a refund up to 30 days after receipt of the products.

boom cylinder

How does a boom cylinder contribute to precise boom positioning?

A boom cylinder plays a crucial role in achieving precise boom positioning. Here’s a detailed explanation:

Precise boom positioning is essential in various applications, including construction equipment, such as cranes and aerial lifts. Boom cylinders contribute to precise boom positioning in the following ways:

  • Controlled Extension and Retraction: Boom cylinders enable controlled extension and retraction of the boom. By adjusting the hydraulic pressure within the cylinder, operators can precisely position the boom at desired lengths. This controlled movement ensures accurate reach and avoids overshooting or undershooting the target position.
  • Smooth Articulation: Boom cylinders provide smooth articulation of the boom sections. They allow for controlled movement and precise positioning of the boom’s multiple segments, such as the main boom, jib, or telescopic sections. Smooth articulation ensures seamless boom operation and precise positioning of the load or working platform.
  • Load Stabilization: Boom cylinders help stabilize the load during boom movement. They counterbalance the weight of the load and provide stability, minimizing swinging or swaying of the load during positioning. This stability is crucial for achieving precise positioning, especially when working with delicate or sensitive loads.
  • Incremental Control: Boom cylinders offer incremental control over the boom’s movement. Operators can make small adjustments to the boom’s position by modulating the hydraulic pressure within the cylinder. This incremental control allows for fine-tuning and precise alignment of the boom, ensuring accurate positioning of the load or attachment.
  • Operator Feedback: Many modern boom systems incorporate feedback mechanisms, such as sensors or load moment indicators. These systems provide real-time feedback to the operator about the boom’s position, angle, and load conditions. By monitoring this feedback, operators can make precise adjustments to achieve the desired boom positioning.

By enabling controlled extension and retraction, smooth articulation, load stabilization, incremental control, and operator feedback, boom cylinders significantly contribute to achieving precise boom positioning. These features ensure accurate reach, alignment, and stability, allowing operators to perform tasks with precision and efficiency.

It’s important to note that precise boom positioning also depends on other factors, such as the design and construction of the boom system, the operator’s skill and experience, and the integration of advanced control technologies in the equipment.

boom cylinder

How does a boom cylinder contribute to load distribution and control?

A boom cylinder plays a significant role in load distribution and control. Here’s a detailed explanation:

In various applications such as construction equipment, material handling machinery, and mobile cranes, boom cylinders are responsible for supporting and controlling the load. They help distribute the load forces and provide precise control over the movement of the boom or arm. Here’s how a boom cylinder contributes to load distribution and control:

  • Load Support: Boom cylinders are designed to withstand and support the loads encountered during operation. They are typically mounted between the machine’s main body and the boom structure, providing a connection that carries the weight and forces of the load. The cylinder’s robust construction and load-bearing capacity ensure that the load is evenly distributed and properly supported.
  • Force Generation: Boom cylinders generate the required force to control the movement of the boom or arm. By extending or retracting, the cylinder exerts force on the boom, allowing it to lift, lower, swing, or articulate as needed. The cylinder’s ability to generate and regulate force ensures precise load control, contributing to safe and efficient operation.
  • Load Stabilization: Boom cylinders help stabilize the load during lifting or movement. By resisting undesired movements or vibrations, the cylinder assists in maintaining the load’s stability and preventing excessive swinging, tilting, or shifting. The controlled movement provided by the cylinder helps minimize the risk of load damage or accidents, ensuring safer and more controlled operations.
  • Balance and Alignment: Boom cylinders aid in achieving balance and alignment of the load. By controlling the extension or retraction of the boom, they allow operators to adjust the position of the load relative to the machine’s center of gravity. This balancing capability helps optimize stability, prevent tipping, and enable precise positioning of the load.
  • Controlled Speed: Boom cylinders enable precise control over the speed of load movement. By regulating the extension or retraction speed, the cylinder allows operators to adjust the lifting or lowering speed according to the requirements of the task. This controlled speed enhances load handling precision, minimizes impact forces, and improves overall safety.

The use of a boom cylinder in load distribution and control offers several benefits:

  • Enhanced Safety: Boom cylinders contribute to load stabilization, balance, and controlled movement, reducing the risk of load accidents or instability.
  • Precise Load Handling: The force generation and controlled speed provided by boom cylinders enable operators to handle loads with precision, ensuring accurate placement and minimizing the potential for damage.
  • Improved Efficiency: Boom cylinders facilitate efficient load distribution and control, enhancing productivity and reducing the time required to complete tasks.
  • Load Capacity Optimization: By supporting and distributing the load forces, boom cylinders help optimize the machine’s load capacity and performance.

Overall, a boom cylinder is a crucial component in load distribution and control. It provides load support, generates force, stabilizes the load, aids in balance and alignment, and enables controlled speed. These features contribute to safe, precise, and efficient load handling in various applications.

It’s important to follow the manufacturer’s guidelines and recommendations regarding the selection, installation, and maintenance of boom cylinders to ensure their proper functioning and optimal load control.

boom cylinder

How does a boom cylinder differ from other types of hydraulic cylinders?

A boom cylinder differs from other types of hydraulic cylinders in terms of its design, function, and application. Here’s a detailed explanation of the differences:

  • Design: Boom cylinders are specifically designed for heavy machinery, such as excavators, cranes, and loaders, where they are used to control the movement of the boom. They are typically larger and more robust compared to other hydraulic cylinders to handle heavy loads and withstand harsh operating conditions.
  • Function: The primary function of a boom cylinder is to extend, retract, lift, and lower the boom of heavy machinery. It provides the necessary force and control to maneuver the boom for tasks such as excavation, material handling, or lifting heavy loads. Other types of hydraulic cylinders, such as single-acting or double-acting cylinders, may serve different purposes, such as linear motion control or actuation of specific machine components.
  • Application: Boom cylinders are predominantly used in heavy machinery applications where the boom’s movement is critical, such as construction, mining, and material handling. They are specifically designed to meet the requirements of these industries, including the ability to handle high loads, repetitive movements, and extreme operating conditions. Other hydraulic cylinders, on the other hand, have a wide range of applications across various industries, including manufacturing, agriculture, automotive, and aerospace.
  • Size and Capacity: Boom cylinders are typically larger in size and have higher load capacities compared to other hydraulic cylinders. This is because they need to accommodate the size and weight of the boom and handle the significant forces involved in heavy machinery operations. Other types of hydraulic cylinders come in various sizes and load capacities, depending on their specific application and requirements.
  • Integration: Boom cylinders are often integrated into the hydraulic systems and control mechanisms of heavy machinery. They work in conjunction with other hydraulic components, such as pumps, valves, and actuators, to ensure synchronized and precise boom movements. Other hydraulic cylinders may also be integrated into different systems, but their integration and functionality may vary depending on the specific application.

In summary, a boom cylinder differs from other types of hydraulic cylinders in terms of design, function, application, size, capacity, and integration. Its specialized design and function make it suitable for controlling the movement of the boom in heavy machinery, providing the necessary force, control, and durability required for demanding applications in construction, mining, and material handling industries.

China high quality Sell Excavator Long Reach / Excavator Arm/ Boom Cylinder 19m for Dx300   vacuum pump belt	China high quality Sell Excavator Long Reach / Excavator Arm/ Boom Cylinder 19m for Dx300   vacuum pump belt
editor by CX 2023-11-18