22312EXW33K Nachi Spherical Roller Bearing Steel Cage : Tapered Bore Made in Japan 22312EXW33K Nachi Spherical Roller Bearings, Steel Cage, the bearing has a tapered inner ring bore (K), Made in Japan, the 22312EXW33K inner diameter is 60mm, the 22312EXW33K outer diameter is 130mm and the 22312EXW33K width is 46mm.