KOYO company bearing code small solution

**KOYO Bearing Code Explanation** In the world of bearings, understanding the code system used by manufacturers is essential for selecting the right components. KOYO bearings follow a structured coding system that includes the basic code, prefix code, and suffix code. The basic code indicates the bearing type and size, while the prefix code identifies the bearing style and its components. The suffix code provides details about the design, sealing, lubrication, and other technical specifications. The **prefix code** can vary depending on the bearing type. For example: - **C**: Cylindrical roller bearing or related component. - **45C**: Paired tapered roller bearings, face-to-face arrangement. - **46C**: Paired tapered roller bearings, back-to-back arrangement. - **4CRI**: Four-row cylindrical roller bearing with an inner ring. - **E**: Magnetic motor ball bearing with positive outer diameter tolerance. - **EN**: Magneto ball bearing with negative outer diameter tolerance. - **IR**: Needle bearing inner ring (inches). - **IRA**: Wider version of the IR series. - **IRM**: Needle roller bearing inner ring. On the other hand, the **suffix code** describes various features such as internal design, seals, and lubrication. Some common suffixes include: - **A**: Angular contact bearing with 30° contact angle. - **B**: Angular contact bearing with 40° contact angle. - **C**: Angular contact bearing with 15° contact angle. - **D**: Tapered roller bearing with 28° 30' contact angle. - **OR**: Ball bearing with O-ring seal. - **RK**: Single-sided double-lip synthetic rubber seal. - **RS**: Single-sided lip-type synthetic rubber seal. - **Z**: Single-sided steel dust cover. - **ZZ**: Double-sided steel dust cover. - **W**: Double inner ring, slotted tapered roller bearing. - **E**: Ferrule material code, e.g., SAE8620. - **C1/CN/C3**: Radial clearance levels, with C1 being less than standard and C3 greater than standard. - **FC/FM/FR**: Cage types, such as carbon steel solid cage, nylon die-cast cage, or high-stress brass cage. - **P2/P4/P5/P6**: Precision levels based on JIS standards. Understanding these codes helps engineers and technicians choose the most suitable bearings for specific applications, ensuring optimal performance and longevity. Whether it's for industrial machinery, automotive systems, or precision equipment, proper knowledge of KOYO bearing codes plays a crucial role in maintenance and selection. For more information on bearing technology, check out our other articles on SKF, NSK, and NTN bearings. If you have any questions or need further assistance, feel free to reach out to us through our contact page. *Source: China Bearing Network | Date: July 24, 2013* *Link: http://www.chinabearing.net* **Related Articles:** - SKF Bearing Temperature Detection Methods - Short Cylindrical Roller Bearing Matching Qualification Method - Internal Structure Analysis of NSK Bearings **Recommended for You:** If you found this article helpful, share it with your colleagues or friends who work with bearings. Don’t forget to leave a comment below and let us know how we can improve our content. **Next Article:** The production process of yaw bearings will be discussed in the next section. Stay tuned!

308 Bore Type Thread Insert

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