NU 220 ECML

The NU 220 ECML serves as a cornerstone for heavy-duty radial support, specifically tailored to accommodate the natural elongation of shafts in high-temperature environments. Unlike fixed bearings, its flangeless inner ring design allows the shaft to move freely in the axial direction relative to the housing, preventing internal stress buildup. Built to the 100x180x34mm dimensional standard, this unit leverages an enhanced internal geometry (EC design) to distribute stress more evenly across the rolling elements. This strategic optimization allows for a massive dynamic load capacity, ensuring that even under grueling operational cycles, the bearing maintains its structural integrity and precision.

At the heart of the NU 220 ECML's reliability is its ML-series cage, a precision-machined brass retainer that is centered on the inner ring. This high-grade material selection is crucial for minimizing heat generation and resisting vibrational fatigue, far outperforming pressed steel or plastic cages in volatile industrial settings. Whether integrated into high-speed centrifugal pumps or massive traction motors, the separable nature of the outer and inner rings facilitates a seamless mounting sequence. Capable of hitting reference speeds of approximately 4,300 r/min (and higher limiting speeds with oil lubrication), this bearing is a preferred solution for engineers prioritizing long-term service intervals and reduced frictional losses.

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