"The Cub Cadet 618P09260 Spindle Assembly is an OEM replacement, and it was made specifically for 42-inch lawn mower decks. This makes the blade fit right comfortably in a diameter space of about 6.3 inches, thus allowing for consistent and smooth cuts. Proper rotation and height adjustment of the blade are ensured by the assembly, which guarantees an even lawn cut. Ease of installati... https://www.wholetoolbox.com/cub-cadet-618p09260-spindle-assembly-6-3-dia-42-deck