Lonking 60200008377 CDM6485 CDM6490 Track Bottom Roller Assembly / OEM quality Heavy duty excavator chassis components source manufacturer and supplier / cqc track

Technical Data Sheet: Lonking CDM6485 / CDM6490 Track Bottom Roller Assembly (OEM Part No. 60200008377)

Category: Heavy Duty Excavator Chassis Components / Undercarriage Parts
Applicable Models: Lonking CDM6485, Lonking CDM6490
Certification: CQC (China Quality Certification), ISO9001:2015
Supply Type: OEM Quality Original Equipment Manufacturer / Direct Source Supplier

1. Product Overview: The Foundation of Heavy-Duty Traction

The Lonking 60200008377 Track Bottom Roller Assembly (also known as a track roller or lower roller) is a critical load-bearing component specifically engineered for the undercarriage systems of the Lonking CDM6485 and CDM6490 heavy hydraulic excavators. As a key part of the chassis group, this assembly is responsible for distributing the machine”s entire operating weight across the track chain while facilitating smooth, low-friction travel over abrasive terrain .

Manufactured to strict Original Equipment Manufacturer (OEM) specifications, this bottom roller ensures precise fitment and functional parity with the original factory components. It is the result of advanced metallurgy and precision machining, designed to withstand the extreme dynamic loads and torsional stresses characteristic of heavy earthmoving machinery .

2. Technical Specifications and Material Composition

To meet the rigorous demands of quarry and construction sites, the 60200008377 assembly is constructed from high-strength alloy steels, utilizing a combination of forging and casting techniques to optimize grain flow and structural integrity .

 

Specification Parameter	Details / Value
OEM Part Number	60200008377
Applicable Models	Lonking CDM6485, Lonking CDM6490
Component Type	Track Bottom Roller (Single Flange)
Material Grade	50Mn / 40Mn2 High-strength Alloy Steel
Manufacturing Process	Die Forging / Precision Casting
Surface Hardness	HRC 52 – 58 (Induction Hardened)
Hardened Layer Depth	8 mm – 12 mm
Bushing Type	Floating Seal Equipped (Duo-Cone / Heavy Duty)
Surface Finish	Anti-corrosion Primer / Industrial Paint

Mechanical Characteristics

• Load Capacity: Engineered to support the radial loads imposed by a 48-50 ton operating weight class.
• Wear Resistance: The induction-hardened tread surface (HRC 52-58) provides exceptional resistance against metal fatigue and abrasion, significantly extending service life compared to standard components .
• Sealing Technology: Equipped with heavy-duty floating ring seals to prevent contamination from mud, sand, and water ingress, while retaining lubricant for the internal bearings.

3. Engineering Functionality: The Role of the Bottom Roller

In the track frame assembly, the bottom rollers function as the interface between the rotating track chain and the stationary track frame .

1. Weight Distribution: The primary function of the Lonking CDM6485 bottom roller is to transmit the machine”s gravitational load from the track frame to the track links. Multiple rollers work in unison to ensure ground pressure remains within optimal limits.
2. Guidance: The roller flanges engage with the chain links, guiding the track and preventing derailment during turning or operation on uneven slopes.
3. Friction Reduction: By providing a rotating contact point, the roller minimizes the sliding friction between the machine and the track chain, reducing track tension requirements and power consumption .

4. Quality Assurance and Manufacturing Standards

As a source factory and supplier of heavy-duty excavator chassis components, our production of the 60200008377 follows a stringent Quality Management System certified under CQC (China Quality Certification) standards, ensuring the product meets both domestic and international safety and performance regulations .

• Raw Material Control: All steel stock (50Mn, 40Mn2) is verified for chemical composition and purity.
• Heat Treatment: Precise temperature control during quenching and tempering achieves the optimal balance of core toughness and surface hardness .
• CNC Machining: Post-forging, the mounting faces and bore diameters are machined on Computer Numerical Control (CNC) lathes and machining centers to guarantee strict tolerances for bolt-hole alignment.
• Non-Destructive Testing (NDT): Critical stress zones are inspected via Magnetic Particle Inspection (MPI) or Ultrasonic Testing (UT) to detect subsurface flaws .

5. Compatibility and Application

This track roller is specifically designed for the X-shaped heavy-duty undercarriage found on the Lonking CDM6485 and CDM6490 excavators. These models are typically powered by high-torque Cummins engines (such as the QSM11 series) and are deployed in heavy-duty applications including mining, large-scale infrastructure development, and quarrying .

Why Choose OEM Quality Replacement?

• Interchangeability: Guaranteed 100% interchangeability with the original part, ensuring no modifications are needed during installation .
• Operational Uptime: High durability reduces the frequency of undercarriage maintenance, a critical factor in total cost of ownership (TCO) for fleet operators .

6. Supply Chain and Sourcing Advantages

As a direct source manufacturer, we offer streamlined procurement benefits for global B2B clients:

• Reliable Lead Times: Standard production cycles managed to ensure Just-In-Time (JIT) delivery for aftermarket distributors.
• Packaging: Standard export packaging (fumigated wooden pallets/cartons) ensures the rollers arrive free from corrosion and physical damage .
• Customization: While this part is standardized to OEM specifications, we support private labeling (OEM/ODM) for volume orders .

7.Component Overview Table

The following table summarizes the key undercarriage components with their typical OEM part numbers for reference. These numbers are indicative and may vary based on manufacturer and specific machine configuration.

8. Conclusion

The Lonking 60200008377 Track Bottom Roller Assembly represents a critical investment in the reliability of your heavy equipment. By combining high-grade alloy steel, precision engineering, and rigorous quality control, this component ensures the CDM6485 and CDM6490 excavators maintain maximum traction, stability, and productivity in the most challenging environments. Contact our sales team for detailed drawings or to place a bulk order for this essential undercarriage part.