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1.Applications, Structure, and Function of Thrust Bearings
The Working Principle of Thrust Bearings
Thrust bearings, also known as thrust ball bearings or axial bearings, are primarily used to support or withstand axial or thrust loads. In contrast to radial bearings, which primarily handle radial loads, thrust bearings are specifically designed to handle forces parallel to the shaft's axis.
The main purpose of thrust bearings is to support or control axial loads, ensuring smooth operation of rotating mechanical components. They are commonly used in applications where axial forces are present, such as automotive transmissions, clutches, fans, pumps, and compressors.
Thrust bearings typically consist of one or more axial balls or rollers housed within a bearing seat. Their design allows them to withstand high axial loads while maintaining low friction. A retainer is often present between the balls or rollers and the shaft to keep them properly positioned.
Thrust bearings are generally classified into two types: unidirectional and bidirectional.
Unidirectional bearings can only withstand forces in one direction, while bidirectional bearings can handle forces in both directions. The selection of the appropriate thrust bearing depends on the required load capacity and specific requirements of the application.
In summary, thrust bearings are designed to handle axial loads and provide stable operation with low friction. They play a critical role in many mechanical applications, ensuring the reliable operation of rotating equipment.
Thrust Ball Bearings and Thrust Roller Bearings are common types of thrust bearings used to withstand axial or thrust loads.
Thrust Ball Bearings are bearings that use spherical balls as rolling elements. They are composed of one or more spherical balls positioned within the bearing housing. Thrust ball bearings are typically used in low-speed applications and can handle small to medium axial loads. They offer advantages such as compact structure, easy assembly, and low cost. Common applications include automotive transmissions, fans, and household appliances.
Thrust Ball Bearing Size Chart | ||||
---|---|---|---|---|
Bearing No. (Flat type) |
Bore(d)(mm) |
Outer(D)(mm) |
T(mm) |
r(mm) |
F9-19M | 9 | 19 | 6.5 | - |
F9-20M | 9 | 20 | 7 | - |
51100 | 10 | 24 | 9 | 0.5 |
51200 | 10 | 26 | 11 | 1 |
F10-18M | 10 | 18 | 5.5 | - |
51101 | 12 | 26 | 9 | 0.5 |
51201 | 12 | 28 | 11 | 1 |
F12-23M | 12 | 23 | 7.5 | - |
51102 | 15 | 28 | 9 | 0.5 |
51202 | 15 | 32 | 12 | 1 |
51103 | 17 | 30 | 9 | 0.5 |
51203 | 17 | 35 | 12 | 1 |
51104 | 20 | 35 | 10 | 0.5 |
51204 | 20 | 40 | 14 | 1 |
51105 | 25 | 42 | 11 | 1 |
Thrust Roller Bearings are bearings that use rollers as rolling elements. Depending on the shape of the rollers, thrust roller bearings can be further classified into Thrust Needle Bearings and Thrust Cylindrical Bearings. Thrust needle bearings utilize elongated needle rollers, while thrust cylindrical bearings use cylindrical rollers.
Thrust Roller Bearing Size Chart | |||||
---|---|---|---|---|---|
Bearing No. |
Bearing No. (Thrust bearings plate) |
Bearing No. (Bearings plate) |
Dc1(mm) |
Dc(mm) |
DW(mm) |
AXK 0414TN | AS 0414 | - | 4 | 14 | 2 |
AXK 0515TN | AS 0515 | - | 5 | 15 | 2 |
AXK 0619TN | AS 0619 | LS 0619 | 6 | 19 | 2 |
AXK 0821TN | AS 0821 | LS 0821 | 8 | 21 | 2 |
AXK 1024 | AS 1024 | LS 1024 | 10 | 24 | 2 |
AXK 1226 | AS 1226 | LS 1226 | 12 | 26 | 2 |
AXK 1528 | AS 1528 | LS 1528 | 15 | 28 | 2 |
AXK 1730 | AS 1730 | LS 1730 | 17 | 30 | 2 |
AXK 2035 | AS 2035 | LS 2035 | 20 | 35 | 2 |
AXK 2542 | AS 2542 | LS 2542 | 25 | 42 | 2 |
AXK 3047 | AS 3047 | LS 3047 | 30 | 47 | 2 |
AXK 3552 | AS 3552 | LS 3552 | 35 | 52 | 2 |
AXK 4060 | AS 4060 | LS 4060 | 40 | 60 | 3 |
AXK 4565 | AS 4565 | LS 4565 | 45 | 65 | 3 |
AXK 5070 | AS 5070 | LS 5070 | 50 | 70 | 3 |
Thrust Roller Bearing Products
Thrust needle bearings have smaller rolling diameters and are suitable for high axial load applications with limited space. They are commonly used in automotive transmissions, drive shafts, and small mechanical equipment. Thrust cylindrical bearings, on the other hand, have larger rolling diameters and higher load-carrying capacities. They are suitable for medium to large axial load applications, such as industrial equipment, metallurgical machinery, and machine tools.
Thrust roller bearings generally have higher load-carrying capacities and rigidity. However, compared to thrust ball bearings, they have more complex structures and are more challenging to assemble and adjust.
In summary, thrust ball bearings and thrust roller bearings are common types of thrust bearings. They are designed to withstand and support axial loads in various applications. Selecting the appropriate bearing requires considering factors such as load magnitude, speed requirements, space limitations, and structural complexity.
Further Reading: Comprehensive Introduction to Ceramic Bearings: Overview of Features and Advantages
Further Reading: Introduction to Needle Roller Bearings and Fundamental Knowledge: Comprehensive Guide
Further Reading: Exploring Miniature Bearings in Depth: Uncovering the Features and Applications of Small Bearings
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