Spherical roller bearings are double row, self-retaining units comprising solid outer rings with a concave raceway, solid inner rings and barrel rollers with cages. The inner rings have cylindrical or tapered bores.
The symmetrical barrel rollers orient themselves freely on the concave outer ring raceway. As a result, shaft deflections and misalignments of the bearing seats are compensated.
Many sizes of spherical roller bearings are classified as X-life products. These bearings do not have a central rib on the inner ring and therefore have longer barrel rollers as well as improved kinematics, optimized surfaces and are made from higher performance materials. As a result, the basic dynamic load rating and, under identical operating conditions, the basic rating life of the bearings is significantly improved. In certain applications, this means that a smaller bearing arrangement can be designed.