Single direction spherical roller thrust bearings are composed by a shaft washer, housing washer and one row of asymmetrical barrel roller with cage.
They have a separable design: the cage, rollers and shaft washer together form an assembly, while the housing washer can be mounted separately. Due to their raceways design, they are selfaligning, making the bearing insensitive to the shaft deflection or misalignment between shaft and housing. Axial spherical roller bearings can accommodate radial and unidirectional axial load acting simultaneously on it, even if they are suitable to work under heavy axial loads and high speed rotation. They are manufactured mainly in three different configurations, depending on the bearing size. “EM type” with one piece machine brass cage guided on the shaft washer; “EMEVO type“ has one piece “EVO” machine brass cage guided on the shaft where the axial forces are transmitted via the cage-guiding sleeve and “EJ type” with one high strength pressed steel cage guided on shaft washer. In application where the “EMEVO type“ bearing has to be replaced with “EM type” or “EJ type”, it is necessary to insert a spacer sleeve between the shaft abutment and the shaft washer. The main boundary dimensions of spherical roller bearings are in conformity with ISO 104:2015. They are manufactured with tolerances according to ISO 199:2014.