5 Must-Have Features in a NNU 4920 B/SPW33 Roller Bearing

NNU B/SPW33
Super-precision double row cylindrical roller bearing with lubrication feature
Super-precision double row cylindrical roller bearings in the NNU 49 series are designed to accommodate heavy radial loads and high speeds, while providing a high degree of stiffness. Having three flanges on the outer ring and no flanges on the inner ring, the bearings can accommodate axial displacement in both directions. The separable design simplifies mounting and dismounting, particularly when load conditions require both rings to have an interference fit.
High radial load carrying capacity
Very high rigidity and high running accuracy
Minimize noise, vibration and heat generation
Accommodate axial displacement in both directions
Lubrication feature
Thin section enabling compact application design

Performance
Basic dynamic load rating : 128 kN
Basic static load rating : 255 kN
Attainable speed for grease lubrication : 5 600 r/min
Attainable speed for oil-air lubrication : 6 300 r/min

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