23030EW33K Nachi Spherical Roller Bearing Bronze Cage : Tapered Bore Made in Japan 23030EW33K Nachi Spherical Roller Bearing, Bronze Cage, the bearing has a tapered inner ring bore (K), Made in Japan, the 23030EW33K inner diameter is 150mm, the 23030EW33K outer diameter is 225mm and the 23030EW33K width is 56mm.