In passenger coaches of Indian Railway system, only single bearing type axle box arrangement is used. The inner ring of the bearing is provided with either a cylindrical bore (Direct Mounted type) or with a taper bore and withdrawal sleeve (Sleeve Mounted type). All new
passenger coaches built by Indian Railways, use only direct ounted type spherical roller bearings. Spherical roller bearing consist of an
outer ring having a continuous spherical raceway within which operate, two rows of barrel shaped rollers, which in turn are guided by an inner ring with two raceways separated by a centre rib. The
spherical roller bearings have selfaligning properties and therefore can automatically adjust to any deviation in the centre line of the axle. Spherical roller bearings have a large capacity for radial loads, axle loads in either direction, and complex loads. They are suited for the applications such as railway rolling stocks where vibrations
and shock loads are encountered. Roller Bearings are named according to the shape of rollers. Roller Bearings with spherical rollers are called as Spherical Roller Bearings. (see figure 10.7 for roller Spherical Roller bearing no. 22326/C3 with 130 mm parallel bore on the inner ring are being used on ICF type coaches.
They are directly shrunk fit on the axle journals. These roller bearings need to be inspected periodically at a pre-defined schedule in the workshop in a Roller Bearing Maintenance Shop