Often referred to as short booms or short booms, excavator tunnel booms are specialized attachments used in confined spaces such as tunnels or underground, where a standard excavator boom may be too long or bulky.
This shorter boom allows for greater maneuverability in tight spaces, making it easier to dig and move material without hitting walls or other obstacles.

Key features of the Tunnel Boom/Short Boom:
* Shorter length: designed to work in tight spaces, providing better control and reducing the risk of accidental damage.
* More durable: often reinforced to cope with the stress of working in challenging environments.
* Increased accuracy: allows for more precise digging and handling of materials, which is critical in environments where space is limited.
* Compatibility: Can usually be fitted to a wide range of excavator types, depending on model and manufacturer.

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Excavator Tunnel Arms Suitable For Application

What is the role of beveling the long arm plate?

The melting depth of the welding machine commonly used in the industry is only 3mm thick. The plate thickness of our long arm is at least 8mm. If the beveling is not opened, the welding machine will not be able to penetrate the entire weld, so the welding effect will be poor, and the weld cracking and other problems will occur later.

About Our Company------Zhonghe Machinery

Kaiping Zhonghe Machinery Co.,Ltd. established in 2018, it is a combination of manufacturing and trading, specializing in customizing different kinds of excavator boom arms and attachments. We are located in cuishanhu New District. Kaiping cityJiangmen City. Guangdong Province, China. We boast a 21000m3 steel structure workshop with a large number of high precision processing equipment and a strong and cohesive team of over 100 experienced technical staff. 50 welding workers with over 7 years experience. 30 senior designers, and a high-tech R&D team(10+ years on customization.100+technical patents), strict production system(6+ years quality control and cost control) and warm-hearted service team. Our annual output of various types of excavator boom arms can reach up to 800 sets.

Production Using High-precision Instruments

Plasma cutting machine

Plates less than 30mm thick are plasma cut, while those over 30mm are flame cut. Plasma cutting deformation is 0.1 mm.CNC plasma cutting with less panel deformation.

Double sided boring machine

Improved accuracy and consistency: Since the boring pin operations on both sides of the double-sided boring machine are performed simultaneously, the machining accuracy and consistency on both sides can be guaranteed.

• Milling machine
• responsible for milling wear-resistant blocks, positioning of pipe clamps, etc., used for boring holes. The product precision is strict, the drilling error is within 5-10um, and the precise and accurate design can make the force more balanced, thereby extending the service life.

Beveling machine

It is responsible for the beveling of the plate, which is the first process before welding. Mechanical beveling is used instead of flame beveling, and only 2mm plate thickness is reserved for beveling, so that the plate and welding material can be better welded. By beveling, the welding machine can penetrate the entire weld, and it is not easy to cause problems such as weld cracking.

Our factory has a complete range of production equipment, which is conducive to the production of our products, good quality and ensures product accuracy.

Q1: Are you a manufacturer?

A1: Zhonghe Machinery offers a wide range of attachments for excavators. Such as long booms, demountable booms, telescopic booms, standard buckets, rock buckets, cleaning buckets, tilting buckets and so on. We know that the perfect combination of high quality cast steel products and moderate price is the key to success.

Q2: Why is it called tunnel arm?
A 2: Tunnel arm generally refers to a work unit that operates in narrow spaces. They mostly work in tunnels, so they are called tunnel arms. Each country has a different name, but in China, we call them tunnel arms.

Q3: What are the configurations of Tunnel Boom?
A 3: Depending on the height of the tunnel, it is possible to design a configuration that requires or does not require a boom cylinder, but the necessary configurations are: 1 boom cylinder, 1 bucket cylinder, 8 pins, 6 high-pressure hoses, 1 linkage assembly, 1 crushing hose and 2 shut-off valves. The typical operating height of a tunneling boom is 4-6 meters.

Q 4: What are the requirements for the tunnel arm?
A4: A: It is recommended that the tunnel arm be equipped with a straight hammer. The height of the basement is limited. During operation, the triangular hammer is partially above the plane of the boom and will scrape the top, causing inconvenience to the operation. This problem does not occur with a straight hammer.

B. The tunnel arm design does not take into account transportation height. In general, the transportation of large machinery tunneling arms requires the removal of the crushing hammer prior to transportation. Filling the forearm of the tunneling arm with material will increase the weight of the tunneling arm, compress the crushing hammer, reduce the rebound force of the crushing hammer, and increase the crushing force.

If you want to learn more details, just contact Ada

Whatsapp: +86 15322105263

Teil/Wechat: 0086 15322105263

E-mail: abby@excavatorboomarm.com