What is Roller Bearings?

What is Roller Bearings? A sealed double row spherical roller bearings assembly, having a bearing, with an outer race providing two spaced-apart outer roller tracks, and defining in section an arc of a sphere, an inner race defining two parallel spaced-apart inner roller tracks, each defining in section an arc of a sphere, a plurality of rollers located in respective inner and outer tracks, each of the rollers defining in section an arc of a sphere corresponding to the arcs of respective inner and outer tracks, seal retaining shoulders formed on one race, seal engaging surfaces formed on the other race, two annular flexible seals supported on respective seal retaining shoulders, and extending into engagement with respective seal engaging surfaces, and a bearing housing receiving the bearing, the housing being open at both ends.Also disclosed is a bearing housing having retaining means for retaining a bearing in at least two positions.

Spherical roller bearings have the property that they will accomodate a certain degree of shaft misalignment. The inner race is capable of turning to a certain degree relative to the outer race. This action is not possible in other forms of roller bearing.Roller bearings require lubrication. In many forms of roller bearing however, during operation the lubrication deteriorates and becomes dissipated. For these reasons such bearings must be re-lubricated at regular intervals.http://www.seekpart.com/bearings/roller-bearings/