SF4454 High Speed Ball Bearings 220x295x32mm Mini Excavator Swing Bearing
SF4454 Excavator Bearing (220x295x33.338mm) For Travel/Slewing Systems Of Excavators
Product Overview
The SF4454 excavator bearing is specifically designed for the harsh operating environment of excavators. As a critical component ensuring the stable operation and efficient work of excavators, it plays an indispensable role in various excavator equipment with its excellent performance and reliable quality.
Structural Design
Unique Contact Angle Design
This bearing adopts a large contact angle of 40 degrees, which endows it with strong axial load-bearing capacity to easily cope with the axial forces generated by excavators under complex working conditions. The large contact angle enables effective stress dispersion when bearing combined radial and axial loads, ensuring stable operation and avoiding premature damage caused by local stress concentration.
Optimized Number and Distribution of Balls
The number of internal balls has been carefully calculated and optimized. Compared with other bearings of the same size and standard, it has more balls, significantly improving load-bearing capacity and distributing pressure more evenly during operation. This reduces stress on individual balls, lowering wear risk and extending service life.
Robust Inner and Outer Ring Structure
Both the inner and outer rings are made of high-quality bearing steel and undergo special heat treatment processes, resulting in extremely high hardness and wear resistance. The raceway of the inner ring is precisely matched with the balls to ensure smooth rolling, while the outer ring design ensures stability and reliability even under high-intensity operations.
Reliable Cage
The cage, made of nylon or steel, separates the balls evenly and guides them to roll in an orderly manner. Nylon cages feature light weight, low noise, and good self-lubricating performance, effectively reducing operating friction and energy consumption. Steel cages offer higher strength and rigidity, making them suitable for extreme heavy-load and high-impact working conditions.
Key Dimensions
| Parameter |
Value |
Significance |
| Bore Diameter |
220mm |
Precisely adapted to the relevant shaft diameter of the excavator to achieve a tight fit, ensuring efficient power transmission and stable operation. |
| Outer Diameter |
295mm |
Fits perfectly with the installation part of the excavator, evenly dispersing various loads and enhancing overall structural stability. |
| Width |
32mm |
Optimally designed width ensures sufficient structural strength to bear heavy loads while accommodating compact layout requirements. |
Performance Characteristics
High Load-Bearing Capacity
Relying on its unique structural design and optimized ball configuration, this bearing can stably support relevant components during heavy-load operations such as excavation and loading/unloading, ensuring normal equipment operation.
Good Self-Aligning Performance
Through ingenious structural design, it can adapt to slight deflection and misalignment of the shaft to a certain extent. This allows the bearing to adjust automatically when working on complex terrain, reducing additional stress and wear caused by misalignment.
Long Service Life
High-quality materials, advanced manufacturing processes, and carefully designed structures provide excellent wear resistance and fatigue strength, significantly extending service life compared to ordinary bearings.
Low Noise and Low Vibration
Precision manufacturing ensures extremely high matching accuracy between balls and raceways, resulting in small friction coefficients that effectively reduce noise and vibration levels during operation.
Application Scenarios
Excavator Travel System
As a key component of the travel system, the SF4454 bearing undertakes the important tasks of supporting the weight of the entire machine and transmitting travel power. Its strong load-bearing capacity and good self-aligning performance ensure stable operation on various complex terrains.
Excavator Slewing Device
During slewing operations, this bearing needs to bear huge radial and axial loads while ensuring stability and accuracy. Its high load-bearing capacity and low vibration characteristics enable smooth operation and precise positioning.
Other Key Components
The SF4454 bearing also plays important roles in the working device of the excavator (such as connection parts of boom, arm, and bucket) and key rotating components of the hydraulic system, ensuring coordinated work and stable performance.
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