Nachi Bearings 6024ZZENR 120mm x 180mm x 28mm With Snap Ring (C clip) Made in Japan 6024ZZENR Nachi Bearing, Made in Japan, with a Snap Ring, here are the dimensions of the 6024ZZENR, the 6024ZZENR inner diameter is 120mm, the 6024ZZENR outer diameter is 180mm, 6024ZZENR width is 28mm.