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Today, spherical roller bearings are mainly used for freight cars. The bearings in this application are typically applied as sets of two double row bearings. Spherical 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. The commonly used bearing is the specific size SRB 130 x 220, basic SKF designation 229 750, which is produced in some variants according to specific customer’s requirements. The boundary dimensions 130 x 220 x 73 of this bearing deviate from standard catalogue bearings. In addition, a full assortment of different sizes of spherical roller bearings can be used for further applications, see the SKF General Catalogue. These standard bearings are offered for full bore axleboxes with a closed front cover.