22318EXW33K Nachi Spherical Roller Bearing Steel Cage : Tapered Bore Made in Japan 22318EXW33K Nachi Spherical Roller Bearing, Steel Cage, the bearing has a tapered inner ring bore (K), Made in Japan, the 22318EXW33K inner diameter is 90mm, the 22318EXW33K outer diameter is 190mm and the 22318EXW33K width is 64mm.