Spindle Blade Kit for 50" Lawn Mower Deck, Compatible with Cub Cad-et XT1-GT50 Troy Bilt Super Bronco G8300 MTD, Replaces 618-06980 918-06980 942-05052A 954-04077A

What It Is

This is a complete spindle blade kit designed for 50-inch lawn mower decks, commonly used on Cub Cadet XT1-GT50, Troy Bilt Super Bronco G8300, and MTD models. It replaces worn spindles that drive the mower blades, restoring cutting performance and reducing vibration.

Fitment & Compatibility

Before buying, confirm your deck measures exactly 50 inches (blade tip to blade tip). This kit fits Cub Cadet XT1, XT2, GT50, and Troy Bilt Super Bronco G8300, plus many MTD 50-inch decks. Check your old spindle part numbers: this replaces OEM 618-06980, 918-06980, 942-05052A, and 954-04077A. Measure spindle shaft diameter (typically 5/8 inch or 1 inch) and ensure the pulley size matches your deck. Verify the bearing housing bolt pattern (usually 3-bolt) and pulley groove width for your belt. Aftermarket fit may require slight shimming on some MTD decks.

Key Things to Know

• Quality: Steel housing with sealed bearings. Good for residential use, but not heavy commercial duty. Check for grease fittings—some aftermarket spindles lack them, shortening lifespan.
• Installation Difficulty: Moderate. Requires removing the deck, belt, and pulley. Use a puller for the old spindle; don’t hammer it out. Torque spindle bolts to 30-40 ft-lbs.
• Common Gotchas: The pulley may not be included—verify kit contents. If your deck uses a brake system, check clearance. Reuse or replace the deck belt if worn.
• Vibration Check: After install, run the deck without blades to detect wobble. Imbalanced spindles can damage bearings quickly.

Should You Buy It

If you have a 50-inch Cub Cadet, Troy Bilt, or MTD deck with a worn or noisy spindle, this kit is a solid budget-friendly fix for residential use. It’s not for commercial mowing or decks requiring exact OEM specs—verify fitment carefully to avoid returns.