The Entity Bushed needle roller bearing is composed of one or two rings and a needle assembly with a retainer. It has smaller volume and higher carrying capacity. Therefore, the bearing can meet the requirements of light weight, small space and hightransfer power. Bearing with inner ring or without inner ring can be used according to different application occasions.
The Entity Bushed 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 the 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 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 within2μm in group. Except the full complement needle roller bearings, they have the rigid cages, which correctly guide the parallel axis line of needle roller.
4、Drawing and specification
Needle roller bearings without inner ring, light series
Needle roller bearings ,light series
Needle roller bearings without inner ring , Heavy series
Needle roller bearings ,Heavy series
Needle roller bearings without inner ring ,48 49 series
Needle roller bearings without inner ring ,69 series ,double row
Neelde roller bearings , 48 49 series
Needle roller bearings , 68 sedries , Double