21315EXW33K Nachi Spherical Roller Bearing Steel Cage : Tapered Bore 75mm x 160mm x 37mm Made in Japan 21315EXW33K Nachi Spherical Roller Bearings, Steel Cage, the bearing has a tapered inner ring bore (K), Made in Japan, the 21315EXW33K inner diameter is 75mm, the 21315EXW33K outer diameter is 160mm and the 21315EXW33K width is 37mm.