NU 317 ECP

The NU 317 ECP is a high-capacity, single-row cylindrical roller bearing engineered for heavy radial loads and high-speed rotational applications. The "NU" designation signifies the ring configuration: the outer ring features two integral flanges, while the inner ring is flangeless. This critical design choice allows the inner ring to shift axially relative to the outer ring in both directions, making the bearing ideal as a non-locating, or "floating," bearing in an assembly where thermal expansion or minor mounting errors cause shaft length variations. The roller set and cage can be separated from either ring, simplifying installation and maintenance, which is a major logistical advantage in industrial settings like large electric motors, gearboxes, and pumps.

The "ECP" suffix denotes key internal and material enhancements that boost the bearing's performance envelope. The "EC" (Enhanced Capacity) features an optimized roller-end-to-flange contact and improved internal geometry, which significantly increases both the dynamic and static load ratings-the dynamic rating is a robust 340 kN. The "P" indicates the use of a glass fiber reinforced polyamide 6,6 cage, which is lighter and offers excellent guidance for the rollers. This material choice allows for reduced friction, lower operating temperature, and a higher limiting speed of 4,800 r/min compared to metal cage designs, ensuring the NU 317 ECP delivers reliable, long-term service in demanding operational environments.

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