Rotary 12236. Spindle assembly replaces Cub Cadet 918-04123B, 618-04123B. Fits models LT series mowers with 46" decks using round hole blades.  Pulley only 756-1188 (Rotary 12884).  Shaft only 753-06348, 738-1186.  Top and Bottom bearing only 941-0919B (replaces 741-0919).   618-04123B (Superseded to 918-04123B)