SKF Double Row Angular Contact Ball Bearings - Suffix Code Explanation

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The suffix codes for SKF double row angular contact ball bearings are used to identify specific design features, performance characteristics, and materials. Understanding these suffixes is essential for selecting the right bearing for your application. Here's a detailed explanation of some common suffixes: - **A**: No fill slot - **CB**: Adjusted axial internal clearance - **C2**: Axial clearance smaller than standard - **C3**: Axial clearance larger than standard - **D**: Split inner ring - **E**: Largest type of bearing; with filled slots - **HT51**: High-temperature grease suitable for operating temperatures from -30°C to above 140°C - **J1**: Steel cage with ball guidance - **M**: Machined copper cage with ball guidance - **MA**: Machined copper cage with outer ring guidance - **MT33**: Lithium-based thickener grease, suitable for temperatures between -30°C and -120°C, NLGI grade 3 (standard filling) - **N**: Outer ring with snap ring groove - **NR**: Outer ring with snap ring groove and snap ring - **P5**: Precision and operational accuracy meet ISO class 5 standards - **P6**: Precision and operational accuracy meet ISO class 6 standards - **P62**: P6 + C2 - **P63**: P6 + C3 - **TN9**: Fiberglass-reinforced nylon 66 cage with ball guidance - **2RS1**: Bearings with nitrile rubber seals and steel reinforcement on both sides - **W64**: Solid oil filling - **2Z**: Bearings with stamped steel dust covers on both sides (non-contact seals) Some bearing part numbers may include a prefix such as **BA2B**, which indicates that the bearing is a double-row angular contact ball bearing. Understanding these suffixes helps engineers and technicians make informed decisions when selecting bearings for various mechanical systems. Whether you're working in industrial machinery, automotive applications, or precision equipment, knowing what each suffix represents can significantly improve performance and longevity.

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