As a leading domestic manufacturer of slewing bearings, Jing Bearing announces that a batch of high-precision, large-scale slewing bearings—custom-engineered for a major domestic port group’s bucket-wheel machines—has successfully completed production, passed rigorous acceptance testing, and has now been officially loaded for delivery.

**Overcoming Challenges: Forging the "Waist" of the "Giant Arm"**

As the core equipment for the continuous handling of bulk materials, the bucket-wheel stacker-reclaimer serves as the "heart" of operations at ports, power plants, and mines. The slewing bearing—which connects the upper rotating mechanism to the lower traveling mechanism—acts as the "waist" of the entire machine; it must not only withstand immense axial and radial forces but also overcome the complex stresses generated by overturning moments.

Faced with the client's stringent requirements for high reliability, extended service life, and adaptability to extreme operating conditions, Jing Bearing’s technical team rose to the challenge. Addressing the specific characteristics of bucket-wheel slewing bearings—namely, the heavy impact loads during operation and the dust-laden working environment—engineers optimized the raceway heat treatment process. By employing advanced medium-frequency induction hardening technology, they ensured an optimal balance between raceway surface hardness and case depth.

**Technical Highlights:**

1.    **Material Upgrade:** Utilizes high-purity 42CrMo premium alloy steel, subjected to forging processes to completely eliminate internal defects.

2.    **Precision Control:** Strictly controls the meshing clearance of the gear pair to ensure smooth operation of the large-scale slewing bearing during the critical moments of heavy-load startup and shutdown, thereby effectively reducing impact noise.

**"Luoyang Jing Bearing-Made": Honoring Heritage, Innovating Processes**

"Jing Bearings" stands as an iconic symbol of China's industrial prowess. Leveraging Luoyang's deep-rooted advantages within the bearing industry supply chain, Jing Bearing fully integrated digital manufacturing systems into the production of the specialized bucket-wheel slewing bearings featured in this delivery.

The machining precision of the slewing bearing directly determines the overall service life of the entire machine. For this specific delivery, Jing Bearing utilized high-precision vertical grinding machines for raceway processing. By integrating imported inspection equipment into the workflow, the company successfully controlled the rotational precision of the products to within the P5 grade (Precision Grade) standard. Furthermore, addressing the inherent challenges of maintaining bucket wheel excavators during field operations, the slewing ring for this equipment features a specially optimized sealing structure. By employing a double-lip labyrinth seal, it effectively prevents the ingress of large particulate contaminants—such as coal dust and grit—into the raceway, thereby significantly extending maintenance intervals.

Market Response: High Cost-Performance Ratio Wins Repeat Business

At the delivery site, the client’s quality assurance representative spoke highly of Jing Bearing’s products: "This batch of bucket wheel excavator slewing rings not only meets our standards for external finish and quality, but their actual operational smoothness even surpasses that of the imported brands we previously used. Jing Bearing’s delivery lead time was one-third shorter than that of foreign manufacturers, saving us valuable time and accelerating the commissioning of our project."

Indeed, as the pace of domestic infrastructure development accelerates, domestically produced bucket wheel excavator slewing rings are gradually displacing imported alternatives, thanks to increasingly mature manufacturing processes and exceptional cost-performance ratios. Through its steadfast quality control and customized service offerings, Jing Bearing has established itself as a strategic partner for numerous heavy machinery manufacturers across the country.

About Jing Bearing

Jing Bearing is a comprehensive enterprise integrating R&D, design, manufacturing, sales, and service for slewing bearings. The company’s product portfolio encompasses various series—including slewing rings, crossed roller bearings, and large-scale thrust bearings—which are widely utilized in fields such as construction machinery, port equipment, wind power generation, medical devices, and heavy-duty equipment like bucket wheel excavators and stacker-reclaimers.

The company is equipped with advanced manufacturing assets, including large-scale CNC vertical lathes, CNC grinding machines, and specialized gear processing equipment, enabling it to manufacture a wide range of non-standard bearings with diameters ranging from Φ200mm to Φ8000mm. We are dedicated to providing our clients with the most optimized and cost-effective rotary support solutions available.