The needle roller and cage components are independent and are quick-installed bearing units. In applications where shafts and housing bores are used as raceways, components can be used to produce bearing units that require minimal radial space.
Features and advantages
The smallest cross section in a rolling bearing is
In applications where the available space is small, needle roller and cage assemblies can provide a compact solution.
High carrying capacity
Due to the large number of rollers, the needle roller and cage assembly has a high load-bearing capacity.
High rigidity
Due to the large number of needle rollers and cage components, it has a large number of small diameter rollers, so it has high rigidity.
Basic design bearing (bearing type K)

Single row design 

Double row design

They have the following characteristics:
Simple installation and good stability
Cage bag provides precise roller guidance
Has good running performance