1,Double row aligning roller bearing outer ring raceway is spherical design,inseparable bearing.2、retainer with steel stamping,brass and nylon retainer design.3,using  high precision drum shape  rolling element.4,Reasonable structure design ,can adapt to the high-speed self-aligning operate.5,Aligning roller bearing can withstand two-way axial load and high load of radial load. 6,About the desgin of double row self-aligning roller bearing can aligning the maximum angle is 2.5 º,Sealed type bearings maximum angle can achieve 1.5º.7,Aligning roller bearing in series 213,230,231,240,241,222,223,232  has both cylindrical and tapered bore two designs.8,Aligning roller bearing has many internal meridional clearance C2,CN,C3,C4 etc.9,The whole bearing using high quality chrome steel, chrome molybdenum steel,nickel-chromium -molybdenum steel,using impregnation carbon quenching fine steel structure suitable hardness,increase the wear resistance of the bearing.10,Tapered aligning roller bearing can with tight sets,locknut,withdrawal sleeve.11,Aligning roller bearing outer ring with oil and gas hole.12,Aligning roller bearing suffix "K" express that inner hole taper is 12:1,suffix "K30" taper is 30:1.