23164EW33 Nachi Spherical Roller Bearing Bronze Cage 320mm x 540mm x 176mm Made in Japan 23164EW33 Nachi Spherical Roller Bearings, Bronze Cage, Made in Japan, the 23164EW33 inner diameter is 320mm, the 23164EW33 outer diameter is 540mm and the 23164EW33 width is 176mm.