CUB CADET 918-06979 Blade Spindle Assembly W/Pulley XT1 XT2 LX54 LT54 FAB

What It Is

The Cub Cadet 918-06979 Blade Spindle Assembly w/Pulley is a complete replacement unit for the blade drive system on select Cub Cadet XT1, XT2, LX54, and LT54 FAB lawn tractors. It includes the spindle housing, bearings, shaft, and pulley, designed to restore blade rotation when the original spindle fails or wears out.

Fitment & Compatibility

• Deck size: Fits 46-inch, 50-inch, and 54-inch fabricated (FAB) decks on XT1, XT2, LX54, and LT54 series tractors. Not compatible with stamped steel decks.
• Model check: Verify your tractor’s model number (e.g., XT1 LT46, XT2 LX54) against Cub Cadet’s parts lookup. Common compatible models include: XT1 LT46, XT1 GT46, XT2 LX46, XT2 LX54, LT54 FAB.
• OEM vs aftermarket: This is an OEM Cub Cadet part (918-06979). Aftermarket spindles may vary in bearing quality and pulley dimensions.
• Measurements: Spindle shaft diameter is 5/8-inch. Pulley diameter is approximately 4 inches. Bolt pattern is 3-bolt, 3.5-inch center-to-center.
• What to check before buying: Measure your old spindle bolt pattern and shaft diameter. Confirm your deck is a “FAB” (fabricated) type—look for “FAB” in the deck model or a welded steel deck, not stamped. Also check that the pulley matches your belt width (typically 1/2-inch).

Key Things to Know

• Quality: OEM part ensures correct fit, bearing tolerances, and pulley alignment. Aftermarket spindles often fail faster due to lower-grade bearings.
• Installation difficulty: Moderate. Requires removing the mower deck, unbolting the old spindle (3 bolts), and transferring the blade. No special tools beyond a socket set and a torque wrench (recommended 30-40 ft-lbs for spindle bolts).
• Common gotcha: The pulley may be pre-installed, but check that it spins freely. If replacing only one spindle on a multi-spindle deck, replace all spindles at the same time to avoid uneven wear and vibration.
• Bearing life: Expect 2-4 seasons depending on mowing frequency, grass conditions, and lubrication. Sealed bearings are non-serviceable.

Should You Buy It

Buy this if you have a Cub Cadet XT1, XT2, LX54, or LT54 FAB deck with a failed spindle and want a direct OEM replacement with reliable fit and durability. It’s the right choice for DIY repairs on fabricated decks, but skip it if your deck is stamped steel—you’ll need a different spindle.