The MTD 61804474B Spindle Assembly is an authentic OEM replacement part designed for various MTD, Cub Cadet, Troy-Bilt, and other compatible lawn mowers. This critical component securely holds the mower blade, allowing it to rotate smoothly for efficient cutting. It consists of a durable housing, a shaft, and precision bearings. Regular replacement of worn or damaged spindle assemblies prevents blade wobble and vibration, ensuring consistent cutting quality and extending the life of your mower deck. This part replaces previous numbers such as 61804474A, 61804474, 91804474B, 91804474A, and 91804474.