SKF Bearing Postcode Spherical Roller Bearings CAC, ECAC, CA, ECA - These are designed for large size bearings and the rollers are symmetrical. There are fixed retaining edges on both sides of the inner ring, and the moving retaining ring is guided by the inner ring. The cage is a solid brass or steel frame. CAC and ECAC type bearing roller and raceway surfaces are optimized to help guide the rollers and reduce friction. ECAC type has reinforced rollers to increase load capacity. CC, C, EC - these bearings have symmetrical rollers and no ribs in the inner ring. Each row of rollers has a stamped steel plate cage. The moving retaining ring is guided by the inner ring. EC type bearings use reinforced rollers to increase load capacity. The CC-type bearing roller and raceway surfaces are optimized to help guide the rollers and reduce friction. E——is the latest standard design adopted by SKF. The bearing rollers are symmetrical, the inner ring has no ribs, the movable retaining ring made of iron bronze is close to the outer ring, and is guided by a cage. Each row of rollers has a stamped steel plate cage. E-type bearings have all the advantages of CC-type bearings. The newly developed cage can accommodate more extended rollers with larger diameters, making the bearings have higher load capacity. The outer ring of E-type bearings has an oil groove and three oil holes, so a W must be added to the suffix code to indicate the difference. Hope it helps!