46 Inch Mower Deck Spindle Assembly Fit for Cub Cadet XT1-LT46 XT2-LX46 Troy Bilt Super Bronco 46 TB2246 Craftsman T240 T225 T8200 Lawn Mower Replaces OEM 918-06977A 918-06977 618-06977

What It Is

This is a replacement spindle assembly for 46-inch mower decks on select Cub Cadet, Troy Bilt, and Craftsman lawn tractors. It drives the blade rotation and supports the pulley and blade mounting hardware, commonly needed when the bearing fails or the spindle shaft bends.

Fitment & Compatibility

Before buying, confirm your mower has a 46-inch stamped deck (not fabricated). Models that fit include Cub Cadet XT1-LT46, XT2-LX46; Troy Bilt Super Bronco 46, TB2246; Craftsman T240, T225, T8200. Replaces OEM part numbers 918-06977A, 918-06977, and 618-06977. Measure the spindle shaft diameter—this uses a 3/4-inch shaft with a 5/8-inch keyway (common on these decks). Verify your deck’s pulley and blade center hole size match (typically 3/4-inch). If your deck uses a different spindle bolt pattern or shaft size, this won’t fit.

Key Things to Know

• Bearing quality: This is an aftermarket assembly. Bearings are sealed but may not last as long as OEM. Inspect for smooth rotation before install—roughness means return it.
• Installation difficulty: Moderate. You’ll need a socket set, torque wrench, and possibly a puller for the pulley. Expect 30–60 minutes per spindle.
• Common gotcha: The pulley retaining bolt often seizes. Soak with penetrating oil before removal. Replace the pulley if it’s worn or wobbles.
• Check blade bolts: Use new blade bolts (usually 5/16-24) and torque to spec (typically 30–40 ft-lbs). Overtightening can warp the spindle housing.

Should You Buy It

If you need a budget-friendly, drop-in replacement for a worn spindle on a 46-inch stamped deck from Cub Cadet, Troy Bilt, or Craftsman, this is a solid choice for the price. It’s not built for heavy commercial use, but for a homeowner mowing a standard lawn, it’ll get the job done. Just confirm your deck’s shaft diameter and keyway match before ordering.