Rolling Bearing Size Series Code

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The rolling bearing size series code is an essential part of the bearing designation system. It consists of two main components: the **diameter series** and the **width (or height) series**. These codes help identify the dimensions and design characteristics of a bearing, making it easier for engineers and technicians to select the right bearing for specific applications. The **diameter series** refers to the outer diameter of the bearing relative to its nominal inner diameter. Bearings with the same inner diameter can have different outer diameters, which are represented by a sequence of numbers such as 7, 8, 9, 0, 1, 2, 3, 4, 5, etc. This series indicates how large or small the bearing is in terms of its outer dimension. The **width series**, on the other hand, relates to the width of the bearing when compared to the same diameter series. For example, bearings with the same outer diameter may vary in width, and these variations are indicated by numbers like 8, 0, 1, 2, 3, 4, 5, 6, etc. The width series helps determine the axial space required for the bearing installation. For **thrust bearings**, instead of a width series, there is a **height series** that corresponds to the radial width of the bearing. The height series typically includes values such as 7, 9, 1, 2, and so on, indicating the axial thickness of the thrust bearing. Understanding these series is crucial for selecting the correct bearing type based on load capacity, space constraints, and application requirements. Proper identification of the size series ensures that the bearing will fit correctly and perform efficiently in its intended environment.

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Recommended for you: - How to use a bearing housing - Precautions for inspecting and maintaining wheel bearings - Reasons behind fatigue failure in INA bearings This article was originally published on [China Bearing Network](http://www.chinabearing.net). Please reference this source if you share or quote this content. Previous: Some experiences in repairing static pressure bearings for grinders; Comparison between old and new FAG bearings and KX20 imported bearings.

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