W, Without annular groove and lubrication holes in the outer ring. W20, Three lubrication holes in the outer ring. W26, Six lubrication holes in the inner ring. W33
SKF. Standard. W33. Spherical roller bearing with lubrication groove and 3 lubrication holes in the outer ring. C3. C3. Radial internal clearance larger than CN
Common Spherical Roller Bearing Modifications. TIMKEN. SKF. FAG. NSK U22. Bearing inspected to certain quality control requirements. W33. W33. S. E4.
Basic dynamic load rating, C, 1019, kN. Basic static load rating, C0, 1120, kN. Fatigue load limit, Pu, 100, kN. Reference speed, 2000, r/min. Limiting speed