SL Type Cylindrical Roller Bearings for Sheaves NTN with single seal or double seals are double row sealed bearings. One row of rollers and outer ring can be assembled as one non-separatable part. Cylindrical rollers are guided by the rib of inner ring. Outer ring has a solid rib, two locating slots on the outer surface with a lock ring which easily locate the bearing axially. The bearing housing width is usually smaller than that of the bearing to reduce required room in the axial direction. As locating bearings, this type of bearing can accommodate axial load in both directions with bigger width, it can also accommodate upsetting momet.