NNCF 5052 CV/L4BC3DR SKF Roller bearing

NNCF have three integral langes on the inner ring and one on the outer ring and have a retaining ring in the outer ring, on the side opposite the integral lange, to hold the bearing together.
The retaining ring should not be loaded axially during operation. NNCF are used to locate the shaft axially in one direction and eventually to accommodate axial displacement of the shaft relative to the housing in the opposite direction