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Durable SF4831 Bearing For Excavators (240x310x33.4mm) - Ideal For Tough Working Conditions
I. Product Overview
The SF4831 excavator bearing is a high-performance bearing specifically designed for the complex working conditions of excavators. It plays a crucial role in ensuring the stable and efficient operation of excavators, and its outstanding performance makes it a reliable choice for numerous excavator manufacturers and the maintenance market.
II. Structural Design
Unique Contact Angle Structure: It adopts a 40-degree large contact angle design. This special angle greatly enhances the bearing's axial load-bearing capacity. During excavator operations, which often involve strong axial forces generated by material excavation, loading, and unloading, the SF4831 bearing can easily cope with such forces. Meanwhile, when bearing combined radial and axial loads, it can reasonably disperse stress, ensure stable operation, and effectively reduce the risk of failures caused by stress concentration.
Optimized Ball Configuration: The number and layout of internal balls have been carefully considered. Compared with ordinary bearings of the same specification, it has more balls. This not only significantly improves the overall load-bearing capacity of the bearing, enabling it to withstand heavier working loads, but also distributes pressure more evenly during operation, reducing the stress on individual balls, significantly minimizing wear, and thereby extending the bearing's service life.
Durable Inner and Outer Rings: The inner and outer rings are made of high-quality bearing steel and undergo special heat treatment processes, resulting in extremely high hardness and excellent wear resistance. The inner ring raceway is precisely matched with the balls to ensure smooth rolling; the outer ring design is fully compatible with the installation requirements of relevant excavator components, and can always remain stable even in high-intensity operating environments.
Reliable Cage Design: The cage is available in two materials: nylon and steel. Nylon cages are lightweight, produce low operating noise, and have 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. They can ensure that the balls still roll stably and orderly under harsh conditions, avoiding mutual collision or jamming.
III. Key Dimensions
Parameter
Value
Significance
Bore Diameter
240mm
It is precisely adapted to the specific shaft diameter of the excavator to achieve a tight fit, ensuring efficient power transmission from the shaft to the bearing. It avoids problems such as relative sliding and vibration between the shaft and the bearing caused by poor bore diameter matching, laying a foundation for the stable operation of the equipment.
Outer Diameter
310mm
It perfectly fits the installation part of the excavator. During installation, it can evenly disperse various loads borne by the bearing, enhance the overall structural stability of the equipment, and at the same time ensure a reasonable gap with surrounding components, preventing installation difficulties or interference with other components caused by deviations in outer diameter size.
Width
33mm
This width is determined after comprehensively considering the structural strength of the bearing and the compact layout requirements of the equipment. Sufficient width ensures that the bearing can accommodate an appropriate number of balls inside to improve load-bearing capacity, while also adapting to limited installation space, allowing it to fully exert optimal performance in narrow spaces and improve the space utilization of the equipment.
Weight
approx. 5.1kg
The reasonable weight design ensures that the bearing has sufficient strength to bear heavy loads, while also taking into account the equipment's pursuit of lightweight. Lightweight helps reduce the inertial force during equipment operation, lower energy consumption, and improve the equipment's response speed and operating efficiency.
IV. Performance Characteristics
High Load-Bearing Capacity: Relying on its unique structure and optimized ball design, the SF4831 excavator bearing can withstand a basic dynamic load rating of up to 171kN, stably supporting relevant components during continuous excavator operations; its basic static load rating reaches 241kN, enabling it to bear huge instantaneous loads without deformation or damage when the equipment starts, stops, or is in a static state, meeting the heavy-load operation needs of excavators.
Excellent 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 within a certain range. When the excavator works on complex terrain and the shaft system is slightly deviated due to ground undulation 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.
Long Service Life: High-quality materials, advanced manufacturing processes, and carefully designed structures endow this bearing with excellent wear resistance and fatigue strength. Under normal use and maintenance conditions, its service life is far longer than that of ordinary bearings, reducing the frequency of replacement, lowering equipment maintenance costs, and improving the economy and efficiency of excavator use.
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, which effectively reduces noise and vibration levels. This not only creates a more comfortable working environment for operators but also reduces potential damage to other components of the equipment caused by noise and vibration, facilitating the long-term stable operation of the equipment.
V. Application Scenarios
Excavator Travel System: As a core component of the travel system, the SF4831 bearing undertakes the important tasks of supporting the weight of the entire machine and transmitting travel power. When the excavator travels, 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 ensures the stability of the travel system, enabling the excavator to move flexibly on complex terrain.
Excavator Slewing Device: During the slewing operation of the excavator, the SF4831 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.
Other Key Components: The SF4831 bearing also plays an important role in the excavator's working device (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.
Introduction:
1.Covering an area of 80 mu (about 53,333 square meters), our factory has a 60-person team including 4 professional engineers, ensuring stable production and technical support.
2. Focusing on bearing production for 25 years, quality is our only guarantee
3. Wafangdian Bearing ...
Introduction:
1.Covering an area of 80 mu (about 53,333 square meters), our factory has a 60-person team including 4 professional engineers, ensuring stable production and technical support.
2. Focusing on bearing production for 25 years, quality is our only guarantee
3. Wafangdian Bearing ...