Cylindrical roller bearings utilize straight cylindrical rollers guided by integral ribs on the inner or outer ring, enabling exceptionally high radial load capacity and rigidity. Unlike tapered designs, they handle pure radial loads with minimal friction but require separate axial support for thrust loads. Key variants include single-row (NU/NJ/NUP types) for free axial displacement and double-row (NN/NNU types) for ultra-high stiffness. Engineered for precision and speed, they are essential in electric motors, gearboxes, machine tools, and wind turbine main shafts.

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