The solid collar needle roller bearing has compact structure,small radial size and large load carrying capacity. It is
suitable for the parts of which the radial overall size is limited. It is also wide applied to the situation where the shaft or
housing has the swinging motion. In general,the needle roller bearing only withstands the radial load, not the axial load.
When the shaft has axial load, it can be used in combination with other bearings. However,it does not limit the axial
shift of shaft or housing. The limiting rotational speed of needle roller bearing is lower.In high rotational speed of main
machine,the needle roller bearing with cage shall be chosen as far as possible.In compassion with other types of needle
roller bearings,under the situation of same radial size, the needle roller bearing has the large load carrying capacity and
high rigidity but has high friction torque.
This kind of bearing has many series with different structure and size. It is requested that the hardness, processing
accuracy and surface roughness of shaft journal surface and rolling surface of outer housing be same as those of
the collar of bearing. As for the needle roller with G2 class,the diameter varies within 2μm in group.Except the full
complement needle roller bearings,they have the rigid cages,which can correctly guide the parallel axis line of needle
roller.

Including the models of RNA…RS,RNA…2RS,NK…RS,NK…2RS;NA…RS,NA…2RS;NKI…RS,NKI…2RS
The seal ring needle roller with inner ring or without inner ring is the solid collar needle roller bearing equipped with
single side or double side synthetic rubber seal ring to ensure long-term lubricating function.