The Gutbrod 9180140 Spindle Assembly is a genuine OEM replacement part, also known as MTD 9180140, designed for various MTD brand lawn tractors and zero-turn mowers. This complete assembly includes the spindle shaft, housing, bearings, and grease fitting, ensuring smooth and efficient operation of the mower blades. It is compatible with 42-inch and 46-inch cutting decks on models from brands like Gutbrod, MTD, Cub Cadet, Troy-Bilt, Yard-Man, Bolens, Huskee, White Outdoor, and Ryobi. This spindle assembly replaces numerous previous part numbers, including the 6180140 series and earlier 9180140 variations.