We supply original Series 22 self-aligning ball bearings from the premium manufacturers: SKF- Sweden. FAG- Germany. NKE- Austria. Self-aligning ball bearings always have two rows of balls that have a common raceway. This type of bearing is used when the bearing arrangement has to compensate for misalignment or shaft deflection. Replacement symbols for self-aligning ball bearings: K = Tapered bore. 2RS = Plastic lip seal on both sides. TN9, TVH, TV = Polyamide cage. J = Steel cage. M = Brass cage. C3 = increased internal clearance. DIN 630.