Spherical roller bearings consist of a double raceways of inner ring, two-row spherical roller and cage and a ball composed of outer ring surface. Spherical roller bearings are self-aligning, as shown in Figure 1. 3 shown 

Spherical roller bearings can accommodate bidirectional axial loads, but also able to withstand greater radial load. Self-aligning roller bearing inner ring bore and tapered bore two types. Inner ring tapered bore self-aligning roller bearings mounted on adapter or withdrawal sleeves, so that any location on smooth or stepped shafts. 

Spherical roller bearings with adapter sleeve, with the taper bore and adapter sleeve bearings with adjustable radial clearance. Spherical roller bearings have the following structural type: C, CC, EC type there are two symmetrical spherical rollers of these bearings, the inner ring without flanges, ring, and brought two steel cages. 

Retainer ring from the inner ring raceway in boot spin. EC-enhanced symmetric spherical rollers, has a high load capacity. CC-bearing rollers and raceways optimized processing, help, roller centred, reducing frictional heating.v