The MTD 9180138A is a genuine OEM blade spindle assembly designed for MTD, Cub Cadet, Troy-Bilt, and Yard-Man lawn tractors with 96cm (38-inch) cutting decks. This critical component supports the mower blade, allowing it to rotate smoothly and efficiently. Replacing a worn or damaged spindle assembly with this OEM part restores optimal cutting performance and extends the life of your mower deck. It includes the housing, shaft, and bearings, providing a complete replacement solution.