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

Q1: Are you a manufacturer?

A1: Zhonghe Machinery provides a diverse selection of attachments for excavators, including long reach arms, demolition arms, telescopic arms, standard buckets, rock buckets, cleaning buckets, tilting buckets, and more. We understand that the key to success lies in offering high-quality cast steel products at competitive prices.

Q2: Why is it called a tunnel arm?

A2: Tunnel arms refer to equipment designed for operations in confined spaces, typically within tunnels. Because they often work in such environments, they’re commonly known as tunnel arms. The terminology may vary by country, but in China, we call them tunnel arms.

Q3: What are the configurations of tunnel arms?

A3: Depending on the tunnel’s height, you can design configurations that either require or omit a boom cylinder. However, essential components include: one arm cylinder, one bucket cylinder, 8 pins, 6 high-pressure hoses, a set of link assemblies, a set of breaker pipes, and 2 stop valves. Tunnel arms typically operate at heights of 4-6 meters.

Q4: What are the requirements for tunnel arms?

A4:

• A. It is recommended that tunnel arms be paired with a straight hammer. In basements, where height is limited, a triangular hammer may extend above the arm’s plane, scraping the ceiling and causing difficulty during operation. A straight hammer avoids this issue.
• B. The design of the tunnel arm does not account for transportation height. Typically, for transporting larger machines with tunnel arms, the breaker needs to be removed beforehand. The tunnel arm’s forearm is filled with material to increase its weight, which helps press the breaker down, reduces rebound force, and increases the impact force during crushing.

If you want to learn more details, just contact Ada

Whatsapp: +86 15322105263

Teil/Wechat: 0086 15322105263

E-mail: abby@excavatorboomarm.com