Bearing Accuracy
Source: China Bearing Network | Time: 2013-02-17
Bearing accuracy is a crucial factor in determining the performance and reliability of rolling bearings. It is generally categorized into two main types: dimensional accuracy and rotational accuracy. Dimensional accuracy refers to the precision of the bearing's dimensions, while rotational accuracy relates to how smoothly and precisely the bearing rotates. Bearing accuracy is standardized into different grades, typically ranging from grade 0 (the lowest) up to grade 6X (the highest). These grades are defined by international standards such as ISO, but national specifications may vary slightly in naming or application. For general use, grade 0 is usually sufficient. However, in applications requiring high precision—such as in high-speed machinery, precision instruments, or aerospace equipment—bearings with grade 5 or higher are recommended. Table 1 outlines the typical applications where higher accuracy is required. Table 2 provides a comparison of accuracy levels for different types of bearings according to various national standards. Dimensional accuracy involves measurements related to the inner and outer diameter, width, and other critical dimensions that ensure proper fit and function within the housing and shaft. On the other hand, rotational accuracy focuses on the run-out and concentricity of the bearing during operation, which directly affects vibration, noise, and overall performance. In addition to accuracy, other factors such as load capacity, speed, lubrication, and environmental conditions also play a significant role in bearing selection. Choosing the right bearing with appropriate accuracy can significantly extend its service life and prevent unexpected failures. For more information on bearing maintenance, installation, and application tips, check out our related articles: - How to Extend Bearing Life and Prevent Unexpected Failures - NSK Bearing Application Tips for High-Speed Machining - How to Measure Radial Clearance of Bearings - Repair Conditions and Methods for Rolling Bearings This article was originally published on China Bearing Network. For more details, visit [http://www.chinabearing.net](http://www.chinabearing.net). Previous: The next section will discuss the impregnation method of composite bearings and the characteristics and layout of INA thin-wall bearing products.
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