Needle roller bearings without inner ring

1.Simplified structure: The needle roller bearing without an inner ring is composed of an outer ring, a set of needle rollers, and a cage. Its structure is relatively simple, making it suitable for support structures where the radial installation size is limited.

2.High adaptability and convenient installation: Since the journal directly serves as the rolling surface, the structure of the bearing is greatly simplified, improving its adaptability and installation convenience.

3.High precision and long service life: The needle roller bearing without an inner ring has specific requirements for the shaft that serves as the raceway surface. The shaft must be hardened and ground to a certain precision. Only when such machining standards are met can it exhibit a relatively long service life and operation precision.

4.Enhanced rigidity: Due to the design without an inner ring, the diameter of the shaft can be appropriately increased, thereby enhancing the rigidity of the entire system. This is an important advantage for machinery that needs to bear large loads or operate in a high-load environment.

5.Sealing design: Sealed needle roller bearings, whether with or without an inner ring, are equipped with single-sided or double-sided sealing devices, which can effectively prevent external dirt from invading the interior of the bearing. This ensures the normal operation of the bearing and extends its service life.