Product Video
Products Description
|
Brand |
Product Name |
Model |
Weight/pc |
Part Number |
|
Caterpillar |
slewing bearing |
365C |
1134.7 KG |
3979666 |
Product Details
|
Product Name |
slewing bearing |
|
Part Number |
3979666 |
|
Origin |
United States |
|
Brand Name |
STONE |
|
Model |
365C |
|
Price |
Negotiable |
|
Packing Details |
Standard Export Packing |
|
Delivery Time |
0-30 Days |
|
Payment Term |
L/C, T/T |
|
Price Term |
FOB, CIF, CFR |
|
Supply Capacity |
50,000 PCS/Month |
|
Minimum Order Quantity |
1 PC |
|
Material |
High Quality Steel |
|
Technology |
Precision Machining |
|
Surface |
Treatment Anti-Corrosion Coating |
|
Hardness |
HRC 48-52 |
|
Quality |
Original Factory Standard |
|
After-Sales Service |
Full Support, Online Service |
|
Color |
Standard Caterpillar Yellow or Customizable |
|
Application |
Excavator |
|
Customizable |
including customized materials, surface treatment and specifications |
Product advantages
High Strength and Hardness
The core materials used in large slewing bearings, such as 50Mn and 42CrMo, feature excellent strength and hardness. Taking 50Mn as an example, it has a tensile strength of over 645 MPa, enabling it to reliably withstand heavy axial forces, radial forces and tilting moments, providing solid material support for heavy-duty operation of the whole machine.
Excellent Toughness
42CrMo alloy steel, in particular, delivers high strength together with good toughness. This tough-but-not-brittle characteristic effectively absorbs impact loads during operation, prevents brittle fracture under heavy loads, impacts and harsh working conditions, and significantly improves the safety and reliability of components.
Outstanding Fatigue Resistance
After proper heat treatment such as quenching and tempering, 42CrMo exhibits exceptional fatigue resistance. This property is critical for slewing bearings subjected to long-term cyclic alternating loads, effectively delaying fatigue damage and greatly extending service life under continuous heavy-duty conditions.
Good Wear Resistance
50Mn inherently offers good wear resistance. Moreover, materials represented by 42CrMo are highly suitable for surface hardening and other heat treatment processes, which can form a hardened layer with a hardness of HRC 55–62 on the raceway surface. This greatly enhances contact surface wear resistance, effectively resists wear, pitting and spalling failures, and prolongs the maintenance-free period of the complete machine.
Production process
Precision Forging and Pre-Treatment
Large slewing bearings are formed using a multi-directional precision die forging process, which ensures metal flow lines are continuously distributed along the part profile, significantly improving material density and load-bearing strength. After forging, strict normalizing treatment is applied to homogenize the microstructure and relieve internal stresses, providing a stable foundation for subsequent precision machining.
CNC Precision Machining and Gear Forming
Next, we enter the CNC precision machining link. The gears and mounting hole system are processed in one clamping with high-performance multi-axis CNC equipment, eliminating the need for repeated disassembly, which can maximize the dimensional accuracy of the parts and the positional accuracy of each part. Among them, the gears adopt the form grinding process, which produces gears with high tooth profile accuracy and smooth surface, ensuring stable transmission, low noise and uniform load distribution of the parts.
Controlled Atmosphere Deep Carburizing and Quenching
Subsequently, the parts are subjected to controlled atmosphere deep carburizing and quenching treatment, which is specifically carried out in a controlled atmosphere continuous carburizing furnace. By precisely controlling the process curve of carbon potential, temperature and time, it is ensured that an ideal hardened layer with appropriate depth and gentle hardness gradient is formed on the raceway and tooth surface of the parts. During quenching, a special quenching press is used for pressure quenching, which minimizes the deformation of the parts during the quenching process and ensures the dimensional accuracy of the parts.
Precision Grinding and Full-Process Inspection
After quenching, high-precision CNC grinders are used for the final forming and grinding of the raceway and mounting plane of the parts, enabling the parts to achieve micron-level geometric accuracy and an extremely smooth surface. Moreover, throughout the entire process from forging to finished products, multiple non-destructive testing, hardness testing and dimensional testing are carried out, with strict control throughout, ensuring that each finished product has no internal defects and its performance fully meets the standards without any deviation.
Working Performance
Exceptional Heavy-Duty Stability
Adopting a double-row four-point contact ball design, it can efficiently withstand large axial forces, radial forces and tilting moments simultaneously. During heavy-duty operations such as excavation and lifting, the slewing platform remains stable and controllable without shaking or jamming, effectively ensuring operational safety and positioning accuracy.
High Slewing Precision and Smoothness
Supported by precision manufacturing processes and strict tolerance control, the clearance between the raceway and rolling elements is minimized and kept uniform. This precise fit delivers exceptional slewing accuracy and smooth operation, allowing operators to easily perform fine and precise movements, directly improving overall work efficiency and quality.
Extended Service Life and Reliability
The core components are treated with carburizing and quenching, forming a highly wear-resistant hardened layer with a hardness of HRC55–62 on the raceway surface while maintaining toughness in the core. This "hard outside, tough inside" characteristic effectively resists wear, pitting and fatigue spalling. It maintains stable performance even under harsh working conditions, greatly reducing downtime caused by component failure.
Good Environmental Adaptability and Low Maintenance Requirements
The large slewing bearings are generally equipped with multiple sealing structures and a centralized automatic lubrication system, which effectively prevent the ingress of dust, mud and other contaminants and ensure consistent and sufficient lubrication of the rolling elements. This enhances adaptability to harsh construction site environments, significantly reduces the frequency and workload of routine maintenance, and lowers equipment operation and maintenance costs.
STONE
Stone is a leading supplier of engineering machinery parts, focusing on providing high-quality parts for mining companies. Since its establishment in 2004, we have been based in Shanghai, China, and have built our own brand STONE, becoming a trusted choice in the industry. We are committed to providing a variety of parts including bulldozers, excavators and wheel loaders for well-known brands such as Caterpillar and Komatsu. Our product line covers a full range of OEM parts, such as Track Chain, Track Rollers, Sprocket, Excavator Buckets, Blades, Excavator Cylinders, Swing Circles, and various electrical and hydraulic components to ensure that our customers' stringent requirements for quality and performance are met.
quality
years experience
service
hours warrant
Q＆A
How long does it actually last? Is it prone to failure on harsh construction sites?
Under normal use and proper maintenance, its design life is exceptionally long. This is thanks to its core carburizing and quenching process, which makes the raceway surface as hard and wear-resistant as armor (HRC 55-62), resisting wear and spalling, while the material core remains tough, absorbing impacts and preventing fracture. Additionally, it is equipped with multiple sealing systems and an automatic centralized lubrication system, effectively defending against dust, mud, and water. Therefore, it is specifically designed for harsh working conditions, offering high reliability and significantly reducing unexpected downtime caused by bearing failure.
How is daily maintenance performed? Is it complicated?
Maintenance primarily focuses on lubrication and inspection. Large slewing bearings are typically equipped with a centralized automatic lubrication system. Operation is simple, requiring only periodic replenishment of the specified grease through designated lubrication points. Routine inspection mainly involves listening for abnormal noises, observing whether slewing is smooth and stable, and checking the condition of the seals. Thanks to optimized sealing and long-life design, its maintenance frequency and complexity are much lower than traditional structures, aiming to minimize equipment downtime for servicing.
Can it rotate smoothly and stop stably under heavy loads? What about its precision?
This is precisely its core advantage. Its double-row four-point contact ball design functions like an extremely stable "joint", capable of simultaneously withstanding massive downward pressure, lateral forces, and overturning moments. This ensures that even during heavy-duty operations like excavation and lifting, the slewing platform remains stable and free of shaking. Through precision manufacturing, the clearance between its raceways and steel balls is minimal and uniform, achieving high slewing precision and smooth operation. This allows the operator to perform precise, fine-tuned control, thereby enhancing operational efficiency and quality.
Hot Tags: large slewing bearings 397-9666 for cat365c excavator, China large slewing bearings 397-9666 for cat365c excavator manufacturers, suppliers, factory