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SKF
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21309 EK/C3
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C3: Indicates increased radial internal clearance, suitable for higher temperature and speed applications.. EK: Features a tapered bore for mounting on adapter sleeves or conical shafts.
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FAG
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21309-E1-K
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E1: Represents an optimized internal design for higher load capacity and efficiency.. K: Tapered bore designed for secure and precise mounting.
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NTN
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21309K
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K: Indicates a tapered bore, ideal for mounting on tapered shafts or sleeves.
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KOYO
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21309RW33
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RW33: Features a lubrication groove and holes, enhancing maintenance and operational ease.
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TIMKEN
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21309EKW33C3
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W33: Includes lubrication grooves and holes to extend operational life.. C3: Increased internal clearance for better performance under high-speed or high-temperature conditions.
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NACHI
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21309EXK
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EX: Enhanced internal design for improved durability and load performance.. K: Tapered bore design, enabling better alignment and secure mounting.
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