Description
Common Cylindrical Roller Bearing Models (National Standard N Series)
1. NU Series (Double flanged outer ring, no flanged inner ring, axially movable)
NU204, NU205, NU206, NU207, NU208, NU209, NU210
NU305, NU306, NU307, NU308, NU309, NU310 Used as floating end bearings to compensate for shaft thermal expansion, can only withstand radial forces.
2. N Series (Double flanged inner ring, no flanged outer ring)
N205, N206, N207, N208, N209, N210
N306, N307, N308 Outer ring can be removed, mostly used for fixed-end pairing.
3. NJ Series (Inner ring single retaining edge, capable of withstanding unidirectional axial force)
NJ205, NJ206, NJ207, NJ208, NJ209, NJ210
NJ306, NJ307, NJ308 Can prevent shaft from moving in one direction
4. NUP Series (Inner ring single retaining edge + removable retaining ring, bidirectional axial positioning)
NUP205, NUP206, NUP207, NUP208, NUP209 Can lock the shaft in both directions, serving as the main bearing at the fixed end.
