WD Products > Bearing Series > Self-aligning ball bearings Self-aligning ball bearings Self-aligning ball bearings Self-aligning ball bearings are double row bearings with spherical outer ring groove with aligning ability to compensate middle error, shaft deformation and housing deformation.The bearings can not be dismantled with cylindrical or tapered bore. Self-Aligning Ball Bearings Sealed type (with contact type rubber seals) Self-Aligning Ball Bearings Open Type