23128EW33K Nachi Spherical Roller Bearing Bronze Cage : Tapered Bore Made in Japan 23128EW33K Nachi Spherical Roller Bearings, Bronze Cage, the bearing has a tapered inner ring bore (K), Made in Japan, the 23128EW33K inner diameter is 140mm, the 23128EW33K outer diameter is 225mm and the 23128EW33K width is 68mm.