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7209CTYNDULP4

The NSK 7209CTYNDULP4 is a high-precision, single-row angular contact ball bearing supplied as a universally ground duplex set (DU). Technical Specifications & Dimensions • Bore Diameter (d): 45 mm • Outside Diameter (D): 85 mm • Width (B): 19 mm per bearing • Contact Angle (C): 15° • Cage Type (TYN): Ball-guided polyamide/resin cage designed for lower friction and reduced noise. • Preload / Arrangement (DU / L): Universally ground duplex pair with a light preload. • Accuracy Class (P4): ISO Tolerance Class 4 (equivalent to ABEC 7), offering high running and dimensional precision. • Dynamic Load Rating (Cr): 51.5 kN • Static Load Rating (C0r): 28.8 kN • Limiting Speeds: 17,700 rpm (grease) / 22,000–27,000 rpm (oil/oil-air) • Weight / Mass: ~0.406 kg per bearing Commonly used in high-speed applications like CNC machine tool spindles and precision machinery.