NN 3020 KTN9/SPW33

The NN 3020 KTN9/SPW33 cylindrical roller bearing is a super-precision, double-row bearing designed for applications demanding an exceptional balance of load carrying capacity, rigidity, and high speed. Its "NN" designation indicates a double-row cylindrical roller bearing with three integral flanges on the inner ring and no flanges on the outer ring, allowing for axial displacement in both directions. The "K" in the designation signifies a tapered bore (1:12 taper), enabling precise adjustment of the internal clearance or preload during mounting, which is crucial for achieving optimal stiffness and running accuracy. The "TN9" typically refers to a glass fiber reinforced polyamide cage, ensuring high-speed capability and reduced friction, while "SPW33" denotes the super-precision class and lubrication features. This bearing is ideally suited for machine tool spindles, high-speed gearboxes, and other precision rotating machinery where stability, minimal vibration, and long service life are paramount.

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