Boom In Excavator Accessories

Product Introduction:

The middle arm base—alternatively referred to as the core shaft seat or rear support—of an excavator's boom is a critical load-bearing component that links the boom and the arm. It plays an indispensable role in load transmission, stability assurance, and enabling flexible movements. 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 focus in high-end excavators.

Product Advantages:

The advantages of the middle arm base are mainly reflected in structural innovation, material technology, maintenance convenience, and adaptability to diverse working scenarios. Positioned at the central section of the dipper arm, the core support seat is hinged to the boom via a pin shaft. During operation, it transmits loads—such as bucket resistance and vibration torque—to the boom and chassis structure. It also acts as the rotation axis for the dipper arm, ensuring the precision of excavation depth and angle control. The core support seat’s key structural strengths in the excavator boom include integrated design, anti-eccentric load reinforced structure, centrally symmetric support, reinforced plate configuration, adjustable design, and positioning anti-seepage. Its high reliability stems from the anti-eccentric load structure and integral forging process, which effectively address the cracking problem.

Its adjustable length and angle enable adaptation to multiple application scenarios, while embedded sensors facilitate predictive maintenance capabilities.

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 guarantee all products meet shipment standards, with every detail meticulously addressed. Below is a breakdown of our process:

First, we complete three pre-shipment preparation steps: thorough cleaning to eliminate dirt and debris, application of clear labels containing key product information, and verification of rust-proofing treatments for metal components to safeguard against corrosion. Post-preparation, we carry out a meticulous inspection—screening for defects and conducting functional tests. Any identified issues trigger immediate rework to rectify the problem. 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. This ensures products can be dispatched within 2 hours of a shipment request. Each step is designed to preserve product quality, streamline logistics, and deliver consistent reliability to our customers.

Company Strength:

Over three decades of robust development, the company has proactively expanded into both domestic and global markets. Its products are widely adopted across diverse sectors, including construction machinery, wind power generation, new energy vehicles, rail transit, petrochemicals, and mining machinery. The company has established in-depth cooperation with world-renowned enterprises from countries such as the United States, Canada, Germany, Italy, Belgium, and Japan, with overseas sales contributing to over 50% of its total revenue. Domestically, it has forged strategic partnerships with leading high-end equipment manufacturers, including Zoomlion, XCMG, Sany, Lingsheng, CRRC, Nanjing Gear, and Zhuzhou Gear. Notably, within its product portfolio, the market share of planetary reducer core forgings and medium-to-large hook assemblies ranks first in the domestic market.