Understanding KOYO Bearing Suffixes

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KOYO bearings are widely used in industrial applications due to their high quality and reliability. Each bearing model has a specific suffix that indicates its unique features, such as seal type, contact angle, or special design. Understanding these suffixes can help you choose the right bearing for your application. Here is a breakdown of some common KOYO bearing suffixes: - **A**: Angular contact bearing with a 30-degree contact angle (usually not marked). Example: 7210 - **B**: Angular contact bearing with a 40-degree contact angle. Example: 7210B - **C**: Angular contact bearing with a 15-degree contact angle. Example: 7210C - **RSC**: Silicone rubber RS seal. Example: 6210RSC - **RSD**: Polypropylene rubber RS seal. Example: 6210RSD - **RSE**: Single-sided, rib-guided synthetic rubber seal. Example: 6206RSE - **K**: Tapered bore, with a taper of 1:12. Example: 1210K - **K30**: Tapered bore, with a taper of 1:30. Example: 23026K30 - **N**: Outer ring with a snap groove. Example: 6206N - **NR**: Outer ring with a snap ring. Example: 6210NR - **Y**: Non-standard chamfer smaller than the standard. Example: 30206Y - **S**: Tapered roller bearing with non-standard chamfering. - **SG**: Tapered roller bearing with spiral groove. These suffixes are essential when selecting the correct bearing for specific operating conditions, especially in environments where sealing, load capacity, or precision is critical. If you're working with bearings, it's always a good idea to consult the manufacturer's documentation or reach out to a bearing specialist for detailed information.

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