NA4905 Needle Roller Bearing 25x42x17mm

       NA4905 Needle Roller Bearing 25x42x17mm

 Bearing Features:

Needle roller bearings with inner ring and without inner ring is composed of a machined outer ring, a needle roller and cage assemblies and a separable inner ring consisting of a complete unit.

Due to the small section height space-saving structure;

The outer ring with lubrication grooves and lubrication holes.

Needle roller bearings with inner ring can not be used for the shaft needle bearing raceway applications.

Needle roller bearings with inner ring can not be used for applications without inner ring of the bearing or shaft is not hardened or grinding economic applications. Bearing with inner ring only allows the shaft relative to the housing within a certain range of axial displacement, if provided by a standard inner ring allows axial displacement is not enough, you can use the inner ring broadening.

1.Seal form: open style, Z, ZZ, RS, 2RS, 2RZ 

2.Bearing stop ring: N,NR 

3.Class of precision: ABEC-1, ABEC-3, ABEC-5, ABEC-7 

4.Vibration rank: V1, V2, V3, V4 

5.Noise rank: Z1,Z2,Z3,Z4

6.Internal elimination code: C0, C2, C3, C4, C5 

7.Bearing material: bearing steel (9Cr18), stainless steel(AISI440C, AISI304, AISI316),