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Product Detail
Double-row cylindrical roller bearing
Double-row cylindrical roller bearing
Detail

NN TYPE

This type has ribs only on inner ring. The outer ring and inner ring can be mounted separately. They can not limit the axial displacements of the shaft or outer housing and can carry heavier radial load compared with other cylindrical roller bearings with the same dimensions.

These bearings are specially suitbale for supporting machine tool shafts due to compact structure and smaller deformation caused by load.

NN...K TYPE

The structure of NN...K type is the same as the NN type. The difference is that their inner bore is tapered, which makes it easy to adjust the radial clearance and convenient to mount.

The machine tool shafts mainly adopt this type of bearings and install them on the tapered shaft. Adjust radial clearance by inner ring pressing.

NNU,NNU...K TYPE

This type has ribs only on the outer rings. According to the shape of bores, they can be divided into cylindrical and tapered bores. They do not limit the axial displacement of the shaft and outer cover, and can not carry axial load but they can carry heavier radial load compared with other cylindrical roller bearings with the same dimensions.

NNCF TYPE

This type has three ribs on the inner ring and one rib on the outer ring. They can be axial located in one direction. One fixed ring equipped on the opposite of outer ring makes the bearings become one piece.

NNCL TYPE

This type has three ribs only on inner rings and have stop slots on the two sides of outer rings which make the bearing become inseparble.

NNCS TYPE

This type is inseparable with three ribs only on inner ring and one central locked ring on the middle of outer ring. They do not limit the axial displacement of the shaft and bearing base and can be mounted on the free end of shafts.