The 51204 bearing, a key member of the thrust ball bearing family, is specially designed to efficiently handle axial loads. Its robust structure and precise engineering make it an indispensable component in various mechanical systems, ensuring stable operation and a prolonged service life across diverse applications.

1. Dimensions

   Parameter	Value	Description
   Bore Diameter	20 mm	Precisely machined to achieve a tight and secure fit on the shaft, effectively preventing slippage and misalignment during operation, which is crucial for efficient axial load transfer.
   Outer Diameter	40 mm	Calibrated to seamlessly interface with the bearing housing, facilitating even distribution of axial loads and enhancing the bearing's overall stability within the mechanical system.
   Height	14 mm	Optimized to strike a balance between structural strength and load - bearing capacity, enabling the bearing to withstand significant axial forces while maintaining a compact form.

2. Load Ratings

   • Axial Dynamic Load Rating: Boasting a capacity of 23.2 kN, the 51204 bearing is well - equipped to handle continuous or intermittent axial forces, making it suitable for applications like industrial pumps, compressors, and heavy - duty machine tools.
   • Axial Static Load Rating: It can support a static axial load of 38.5 kN without undergoing permanent deformation, ensuring stability during equipment standby or start - stop cycles.

3. Speed Ratings

   • Reference Speed: The 51204 bearing has a reference speed of 5600 r/min, representing the rotational speed at which it operates optimally under normal conditions, ensuring reliable performance.
   • Limit Speed: It can reach a limit speed of 8000 r/min, but operating near this speed demands careful attention to factors such as lubrication, load, and temperature to prevent premature failure.

4. Cage Material: Typically constructed from steel, the cage offers exceptional strength and durability. It plays a vital role in guiding the balls, ensuring their uniform distribution and smooth movement between the raceways, thereby reducing friction and improving the bearing's performance.

5. Lubrication and Sealing

   • Lubrication: Grease lubrication is commonly used for general - purpose applications, providing long - lasting protection against contaminants and minimizing friction. In high - speed or extreme - temperature environments, oil lubrication is preferred for its superior cooling properties. Some bearings come pre - lubricated for convenient installation.
   • Sealing: The 51204 bearing provides various sealing options, including rubber seals that offer effective protection against dust, dirt, and moisture, and metal shields that provide robust defense against larger debris. Sealed bearings are particularly advantageous in harsh or dirty operating conditions.

1. Separation Design: The 51204 bearing features a separable design, with components such as the shaft ring, seat ring, and rolling elements (balls) that can be easily separated. This design simplifies installation, disassembly, and maintenance, allowing for convenient inspection and replacement of individual parts.

2. Ball and Raceway Configuration: Comprising a set of balls positioned between two raceways (one associated with the shaft, known as the shaft ring, and the other with the housing, called the seat ring), this configuration enables efficient transfer of axial forces. The smooth rolling of balls between the raceways minimizes friction, ensuring smooth operation.

1. Automotive Industry

   • Transmission Systems: In automotive transmission systems, the 51204 bearing supports the axial loads generated during gear shifting, ensuring smooth and precise gear changes, and reducing the risk of gear - related issues.
   • Drive Axles: It is also utilized in drive axles to handle axial loads, contributing to the stable and reliable operation of the vehicle's drivetrain.

2. Industrial Machinery

   • Heavy - Duty Pumps: The 51204 bearing is employed in heavy - duty pumps to support the axial loads from the impeller and fluid pressure, ensuring efficient pump operation and extending the equipment's service life.
   • Forging Equipment: In forging equipment, it withstands the axial loads generated during the forging process, ensuring the stability and accuracy of the machinery.

3. Heavy - Duty Equipment

   • Construction Machinery: In construction machinery such as excavators and loaders, the bearing supports axial loads in various components, ensuring reliable performance in tough working conditions.
   • Material Handling Equipment: It is used in material handling equipment like cranes and forklifts to handle axial loads, facilitating smooth and efficient material movement.

1. Strong Axial Load - Bearing Capacity: The 51204 bearing is specifically engineered to handle heavy axial loads, ensuring the stable operation of machinery and reducing the risk of unexpected breakdowns.

2. Smooth and Efficient Operation: Thanks to precision machining and careful assembly, the bearing operates smoothly with low friction, reducing energy consumption and wear, and enhancing the overall efficiency of the mechanical system.

3. Durable Service Life: Made from high - quality bearing steel and subjected to strict quality control during manufacturing, the 51204 bearing offers a long service life, minimizing the need for frequent replacements and lowering maintenance costs.

4. Cost - Effective Solution: Despite its high - performance capabilities, the bearing is cost - effective, with wide availability and a low total cost of ownership, making it a practical choice for various applications.

5. Easy Installation and Maintenance: The separable design, along with various sealing and lubrication options, simplifies installation and maintenance, saving time and effort for users.