The Difference Between Single and Double Row Bearings

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Single-row angular contact ball bearings are designed to handle axial loads in one direction only. When subjected to radial loads, they generate additional axial forces, which must be counteracted by applying a corresponding opposite load. Therefore, these bearings are typically used in pairs to ensure proper function and stability. On the other hand, double-row angular contact ball bearings are capable of handling larger radial and axial combined loads, as well as moment loads. They primarily rely on radial loading but can also manage axial forces in both directions. These bearings are effective in restricting axial displacement of the shaft or housing. The contact angle for such bearings is usually 30 degrees. The bearing code for this type is generally “7”. When it comes to mounting, paired angular contact ball bearings are commonly used for applications that require bidirectional radial and axial load support. They can also handle pure radial loads. In contrast, tandem arrangements are limited to unidirectional axial loads, while other configurations allow for axial loading in either direction. Single-row angular contact ball bearings are often found in high-speed applications such as machine tool spindles, high-frequency motors, gas turbines, centrifugal separators, front wheel hubs of small cars, and differential pinion shafts. Double-row angular contact ball bearings are widely used in equipment like oil pumps, Roots blowers, air compressors, various types of transmissions, fuel injection pumps, and printing machinery. Whether you're working with precision machinery or heavy industrial equipment, choosing the right bearing type is crucial for ensuring smooth operation and longevity. Understanding the differences between single and double row bearings helps in making informed decisions about your mechanical systems. For more information on bearings and their applications, check out our related articles: - Sliding bearing requirements for smooth grease - Bearing smoothness and its impact on bearing life - Contact angle in rolling bearings - Production process of rolling bearing components - Ferrule forming in rolling bearing manufacturing This article was originally published on China Bearing Network. Please visit [China Bearing Network](http://www.chinabearing.net) for more details. Previous: Analysis of the reason for bearing surface grinding Next: Key issues to consider when dealing with KOYO bearing failures

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