CNN self aligning roller bearings is a concave groove plate with the solid inner ring and outer ring, solid with keep frame of the roller drum form double row privately owned units. Inner circle with a cylinder or cone holes. Spherical roller bearings are inherently self-aligning and very robust. The two rows of rollers make the bearings able to carry heavy loads.
Self aligning roller bearings have two rows of rollers with a common sphered raceway in the outer ring and two inner ring raceways inclined at an angle to the bearing axis (fig). This gives them an attractive combination of design features making them irreplaceable in many demanding applications.