5212-2RS, 2-Row Angular Contact Ball Bearing. Supporting combined radial and bidirectional thrust loads Ball contact angle of 20 degrees relative to the inner and outer raceways increases thrust load capacity Rubber seals on both sides of the bearing to keep lubricant in and contaminants out Pressed steel cage evenly spaces balls for reduced friction, vibration, and noise Normal axial internal clearance for applications where thermal expansion is not a factor.