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The long arm is made of Q355B steel with good strength and rigidity. The shaft sleeve of the extended arm is generally made of 45 # steel, with a 40Cr bushing inside, and the lubricating effect of butter, which reduces the shear force generated when the shaft and sleeve rotate frequently, thus improving the service life of the shaft sleeve. The scope of use is relatively large, but its main role is to improve the excavation radius, in the river dredging, land reclamation, subway entrance excavation, pedestrian underground tunnel, highway parapet repair, general residential cement transport.

All the advantages of exploiting the long arm

1. Less maintenance

The use of high quality materials, such as Q355B as the default, Q690D as optional, Ningbo joint, seamless precision pipeline, graphite alloy copper casing, strong and lightweight bucket barrel.

2. Strong and sturdy

Built-in stiffening rib. Professional welding skills for different bearing positions. Groove preparation before welding (45° edging).

3. The tolerance is 5-10um

The drilling tolerance is within 5-10um to ensure accuracy.

4. Go deeper and higher

The Angle between the arms can reach 163 degrees, and the maximum working range and maximum excavation height are larger.

5. High efficiency and fuel saving

Lighter not only gives consideration to the quality, but also ensures the working efficiency and saves fuel.

6. Metallurgical testing

Steel samples are analyzed in depth to look for microstructural defects and different phases present in biphasic and superbiphasic as well as many other welding materials.

What can Zhonghe do

Custom:

1. Suitable for all brands of excavators.

2. Color, length and material can be made according to your requirements.

3. Additional pipes can be added to accommodate some additional applications.

4. If the customer needs, we can also provide boom cylinder and rod cylinder.

Strong production capacity:

We can produce 50 excavator booms per month.

The annual production of all kinds of excavator arm can reach 600 sets.

Good service:

1. Provide online support within 24 hours.

2. Schedule video support.

(Our engineers have been specializing in excavator booms and accessories for more than 10 years)

3. The excavator boom should be connected in two or three sections to make it fit into a container to save transportation costs.

Quality Assurance:

Long arm 1 year, cylinder and connecting rod 180 days, bucket 90 days.