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Sep . 09, 2024 19:31 Back to list

cylindrical roller bearing number

Understanding Cylindrical Roller Bearing Numbers


Cylindrical roller bearings are crucial components in various machinery and equipment, ensuring smooth and efficient operation. The designation of these bearings often begins with a series of numbers and letters, which characterize their dimensions, design, and features. Understanding these numbers is essential for selecting the correct bearing for any application.


Typically, the first part of the bearing number indicates the series. For example, the prefix “N” usually denotes standard cylindrical roller bearings, while prefixes like “NU,” “NJ,” or “NUP” signify specific configurations, such as cylindrical roller bearings with flanges or those designed for certain axial loads. The series number is followed by a two- or three-digit code that denotes the bearing's bore diameter in millimeters.


cylindrical roller bearing number

cylindrical roller bearing number

Another crucial aspect of cylindrical roller bearing numbers is the suffix, which often indicates special features or modifications. For instance, a suffix of “E” might imply that the bearing has an increased load capacity due to enhanced design details. Similarly, certain letters may denote specific tolerance classes, lubrication options, or seals. For example, “C3” refers to a greater internal clearance than standard, making the bearing suitable for high-speed applications.


When selecting a cylindrical roller bearing, it is vital not only to understand its number but also to consider the application context. Different industries, from automotive to aerospace, require bearings that can withstand various operating conditions, such as temperature extremes, vibrations, and loads. Thus, knowing how to interpret the bearing number allows engineers to choose the most suitable bearing, contributing to overall system reliability and performance.


In summary, the identification of cylindrical roller bearings through their numbering system is a practical skill that enhances engineering precision. By grasping the meaning behind each part of the bearing number, one can effectively navigate the vast options available to find the right fit for specific operational demands. This understanding ultimately leads to improved machinery performance and longevity, underscoring the importance of cylindrical roller bearings in mechanical applications.


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