21307EXW33K Nachi Spherical Roller Bearing Steel Cage : Tapered Bore Made in Japan 21307EXW33K Nachi Spherical Roller Bearing, Steel Cage, the bearing has a tapered inner ring bore (K), Made in Japan, the 21307EXW33K inner diameter is 35mm, the 21307EXW33K outer diameter is 80mm and the 21307EXW33K width is 21mm.