Welding Excavator Boom

Product Introduction:

The middle arm base of an excavator's boom—alternatively referred to as the core shaft seat or rear support—is a critical load-bearing component that links the boom and the arm. It plays an essential role in transferring loads, safeguarding stability, and facilitating flexible movement. Looking ahead, as self-sensing lubrication structures and predictive maintenance technologies become more widespread, the core support seat will further evolve toward an integrated model of "self-adaptation – self-repair – extended service life." Consequently, it will emerge as a core competitive element in high-end excavators.

Product Advantages:

The advantages of the excavator’s middle arm base are primarily reflected in four key aspects: structural innovation, material technology, maintenance convenience, and adaptability to diverse working scenarios.

Mechanical Structural Features

Positioned at the mid-section of the dipper arm, the core support seat is hinged to the boom via a pin shaft. During operation, it transfers loads—such as bucket resistance and vibration torque—to the boom and chassis structure. Simultaneously, it acts as the rotation axis of the dipper arm, ensuring the precision of excavation depth and angle control. Its structural strengths, including integrated design, anti-eccentric load reinforced construction, centrally symmetric support, reinforced plate configuration, adjustable design, and positioning anti-seepage features, collectively contribute to exceptional structural reliability. Notably, the anti-eccentric load structure paired with the integral forging process effectively addresses the risk of cracking.

Intelligent Capabilities

Its adjustable length and angle enable adaptation to multiple application scenarios, while embedded sensors support predictive maintenance functionalities—further enhancing its practical value.

Production Process:

Raw Material Inspection → Cutting → Forging → Heat Treatment/Tempering → Shot Blasting → Rough Machining → Ultrasonic Testing (UT) → Final Inspection → Cleaning  Packaging

Packaging and Shipping

Our team adheres to a rigorous workflow to ensure all products are shipment-ready, with every detail meticulously addressed. Below is an overview of our process:

First, we carry out three key pre-shipment preparation steps: thorough cleaning to eliminate dirt and debris, affixing clear labels containing critical information, and inspecting the rust-proofing treatment of metal components to ward off corrosion.

Post-preparation, a meticulous inspection is conducted—we check for any defects and test product functionality. Any issues identified will trigger immediate rework until standards are met.

Products that pass inspection are then securely packaged using suitable materials. They are stored in our climate-controlled warehouse, where inventory is systematically organized for rapid retrieval—ensuring products can be dispatched within 2 hours of a shipment request.

Every step of this process is designed to safeguard product quality, streamline logistics, and deliver consistent reliability to our customers.

Company Strength:

Over the previous 30 years of dynamic growth, the organisation has actively accelerated into each home and world markets. Its merchandise are extensively utilized in quite a number fields, which includes building machinery, wind energy generation, new strength vehicles, rail transit, petrochemicals, and mining machinery. The enterprise has installed in-depth collaborations with world-renowned firms in nations such as the United States, Canada, Germany, Italy, Belgium, and Japan, with remote places income accounting for greater than 50% of its complete revenue. Additionally, it has fashioned strategic partnerships with leading home high-end gear producers like Zoomlion, XCMG, Sany, Lingsheng, CRRC, Nanjing Gear, and Zhuzhou Gear. Notably, amongst its product range, the market share of planetary reducer core forgings and medium-to-large lifting hook assemblies ranks first in the home market.