The E indicates a design variant optimised for improved load distribution
This 3205BTN bearing is a metric double row angular contact bearing with a modified internal construction
72 03 A5TR SU M P3 Series - Light Bore Size - 17mm 25 Degree Contact Angle Single Universal Medium Preload Precision Rating
13 15 k c3 Narrow Bore Size - 75mm Tapered Bore (1:12 on Diameter) Pressed Steel Cage Radial Internal Clearance Greater than Normal
This 7922CTRSULP3 bearing is a Super Precision angular contact bearing with a 15° contact angle and a phenolic cage
2211EKTN9/W64 - SKF Double Row Self Aligning - 55x100x25mm 23072rstnNSK The E indicates a designThis 2211EKTN9 W64 bearing is a double row, wide series, metric self aligning bearing with an optimized internal design for increased load carrying capacity, a 1: 12 tapered bore, a glass fibre reinforced PA66 cage, solid oil and a normal radial internal clearance. The bearing's dimensions are 55x100x25. 22 11 e k tn9 w64 Wide Bore Size 55mm Extra Capacity Tapered Bore (1: 12 on Diameter) Glass Fibre Reinforced PA66 Cage, Ball Centred Normal Radial