Most of Spherical Roller Bearings in OD less than 320mm,are the structure reinforcing E series bearings. Their differences from other beairngs is that their inner rings have no center rib,therefore their rollers are longer. The rated load of these E series Spherical Roller Bearings are obviously more than the other common roller bearings.
ZWA Spherical Roller Bearings have the cylindrical bore or tapered bore.