NA4900 NA Series Needle Roller Bearing with Inner Ring 1 Pcs

Key features

• Precision-machined NA series needle roller bearing featuring a solid outer ring with integral flanges and a precision-ground inner ring, providing accurate roller guidance and high rigidity under heavy radial loads.
• Includes a hardened and ground inner ring, eliminating the need for shaft hardening and grinding. This design allows direct installation on standard shafts without special surface preparation.
• Made from high-carbon chromium bearing steel, with needles precision heat-treated and ground to ensure long-term operational stability and durability
• Manufactured from high-carbon chromium bearing steel with hardened raceways, offering excellent wear resistance, high fatigue strength, and long service life in demanding industrial environments.
• Available in multiple NA metric sizes. Please verify shaft diameter and housing bore dimensions before ordering. Suitable for gearboxes, transmissions, pumps, and industrial machinery.

The key feature of the NA series is the inclusion of a hardened and ground inner ring. The bearing can be mounted directly onto standard shafts without any special surface preparation. This simplifies installation, reduces machining costs, and allows for easy replacement in maintenance scenarios. The NA series is available in both metric and inch series, with caged type, full complement type, and sealed type options to suit various operating conditions including heavy loads and high-speed or low-speed rotations.

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