21316EXW33K Nachi Spherical Roller Bearing Steel Cage : Tapered Bore Made in Japan 21316EXW33K Nachi Spherical Roller Bearings, Steel Cage, the bearing has a tapered inner ring bore (K), Made in Japan, the 21316EXW33K inner diameter is 80mm, the 21316EXW33K outer diameter is 170mm and the 21316EXW33K width is 39mm.