SF4454 Excavator Bearing (220x295x33.338mm) For Travel/Slewing Systems Of

Product Specification

SF4454 Excavator Bearing (220x295x33.338mm) For Travel/Slewing Systems Of Excavators

I. 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.

II. Structural Design

1. 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. Meanwhile, the large contact angle enables the bearing to effectively disperse stress when bearing combined radial and axial loads, ensuring stable operation and avoiding premature damage caused by local stress concentration.
2. 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. This not only significantly improves the bearing's load-bearing capacity, allowing it to bear heavier loads, but also distributes pressure more evenly during operation, reducing the stress on individual balls, lowering the risk of wear, and extending the bearing's service life.
3. 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; the design of the outer ring fully considers the installation and adaptation with relevant excavator components, ensuring stability and reliability even under high-intensity operations.
4. 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, which can effectively reduce operating friction and energy consumption; steel cages, on the other hand, have higher strength and rigidity, making them suitable for extreme heavy-load and high-impact working conditions, ensuring that the balls can operate stably without mutual collision or jamming in harsh environments.

III. Key Dimensions

IV. Performance Characteristics

1. High Load-Bearing Capacity: Relying on its unique structural design and optimized ball configuration, the SF4454 excavator bearing can bear a radial load of up to [specific high value] and an axial load of [corresponding high axial load value]. When the excavator performs heavy-load operations such as excavation and loading/unloading, it can stably support relevant components, ensure the normal operation of the equipment, and reduce equipment failures caused by insufficient load-bearing capacity.
2. Good Self-Aligning Performance: Although it is not a strictly self-aligning bearing, through an ingenious structural design, it can adapt to slight deflection and misalignment of the shaft to a certain extent. When the excavator works on complex terrain and the shaft system is slightly deviated due to uneven ground or equipment vibration, the bearing can adjust automatically to maintain normal operation, reduce additional stress and wear caused by misalignment, and improve the operational reliability of the equipment.
3. Long Service Life: High-quality materials, advanced manufacturing processes, and carefully designed structures enable this bearing to have excellent wear resistance and fatigue strength. Under normal use and maintenance conditions, its service life is significantly longer than that of ordinary bearings, reducing the frequency of replacement, lowering equipment maintenance costs, and improving the efficiency and economy of excavator use.
4. Low Noise and Low Vibration: The precision manufacturing process ensures extremely high matching accuracy between the balls and the raceways, resulting in a small friction coefficient during operation, thereby effectively reducing noise and vibration levels. This not only improves the comfort of the operator's working environment but also reduces potential damage to other components of the equipment caused by noise and vibration, which is conducive to the long-term stable operation of the equipment.

V. Application Scenarios

1. 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. During the travel of the excavator, it has to bear impact loads caused by uneven ground, axial forces during steering, and complex loads caused by changes in the center of gravity of the entire machine. With its strong load-bearing capacity and good self-aligning performance, it can ensure the stable operation of the travel system, enabling the excavator to move flexibly on various complex terrains.
2. Excavator Slewing Device: During the slewing operation of the excavator, the SF4454 bearing in the slewing device needs to bear huge radial and axial loads, while ensuring the stability and accuracy of the slewing action. The high load-bearing capacity, low noise, and low vibration characteristics of this bearing enable the slewing device to operate smoothly, realizing the precise positioning and efficient operation of the excavator's working device, and improving the accuracy and efficiency of excavation operations.
3. Other Key Components: In addition to the travel and slewing systems, the SF4454 bearing also plays an important role in the working device of the excavator (such as the connection parts of the boom, arm, and bucket) and some key rotating components of the hydraulic system. It can adapt to the complex loads and frequent action changes borne by these components during work, ensuring the coordinated work of various components and the stable performance of the excavator as a whole.