Type of spherical roller bearing in the outer ring and inner ring raceway fitted between pairs of spherical roller.According to the different internal structure,it would be divided into CA,MB,CC,E and CTN1 five cages.Due to the arc center of the outer ring is the same to raceway center line.It has aligning performance.So you can automatically adust the shaft or housing deflection or misalignment caused by shaft is not correct,which can bear radial load and axial load,especially two-way radial load capacity,suitable for bear the heavy load and impact load,tapered bore bearings though the use of fasteners or withdrawal sleeves make the axis of the assembly and disassembly,aligning roller bearing can bear greater radial load,but also able to bear axial load.This lind of bearing outer ring raceway is spherical,it has a self-aligning properties,when the axial force or bending the center line of inner and outer ring tilt Ershi rather inclined not more than1-2.5 centerline,the bearing can still work.