22310EXW33K Nachi Spherical Roller Bearing Steel Cage : Tapered Bore Made in Japan 22310EXW33K Nachi Spherical Roller Bearing, Steel Cage, the bearing has a tapered inner ring bore (K), Made in Japan, the 22310EXW33K inner diameter is 50mm, the 22310EXW33K outer diameter is 110mm and the 22310EXW33K width is 40mm.