The MTD 9180609D Spindle Assembly is a genuine OEM replacement part designed for a wide range of MTD, Cub Cadet, Troy-Bilt, Yard-Man, and White Outdoor lawn tractors and zero-turn mowers. This essential component supports the mower blade, ensuring smooth and efficient cutting. It replaces several earlier part numbers including 6180609, 6180609A, 6180609B, 6180609C, 6180609D, 9180609, 9180609A, 9180609B, and 9180609C. Engineered for durability and precise fitment, this spindle assembly restores optimal blade rotation and deck performance, with a shaft length of 162.05 mm and a housing height of 165.1 mm.