⊙RNA and NK types of needle roller bearings without inner rings
⊙Needle roller bearings without inner rings are suitable for components with limited radial dimensions. Due to the absence of inner rings, the surface of the journal that matches them directly serves as the rolling surface. The surface hardness of the bearing is required to be no less than HRC60, and the surface roughness Ra value should not exceed 0.63. This type of bearing does not limit the axial displacement of the shaft or shell, and has a high limit speed.
⊙NA and NKI types with inner ring needle roller bearings
⊙This type of bearing can be installed separately with the inner ring, outer ring, complete set of rolling needles, and retainer due to the lack of retaining edges on the inner ring, without limiting the axial displacement of the shaft or housing. Due to the use of a cage to separate the rolling needles and reduce friction, it can be used in components with higher rotational speeds.
⊙Needle roller bearings without inner rings are suitable for components with limited radial dimensions. Due to the absence of inner rings, the surface of the journal that matches them directly serves as the rolling surface. The surface hardness of the bearing is required to be no less than HRC60, and the surface roughness Ra value should not exceed 0.63. This type of bearing does not limit the axial displacement of the shaft or shell, and has a high limit speed.
⊙NA and NKI types with inner ring needle roller bearings
⊙This type of bearing can be installed separately with the inner ring, outer ring, complete set of rolling needles, and retainer due to the lack of retaining edges on the inner ring, without limiting the axial displacement of the shaft or housing. Due to the use of a cage to separate the rolling needles and reduce friction, it can be used in components with higher rotational speeds.