23144EW33K Nachi Spherical Roller Bearing Bronze Cage : Tapered Bore Made in Japan 23144EW33K Nachi Spherical Roller Bearings, Bronze Cage, the bearing has a tapered inner ring bore (K), Made in Japan, the 23144EW33K inner diameter is 220mm, the 23144EW33K outer diameter is 370mm and the 23144EW33K width is 120mm.