918-06991 618-06991 Spindle Assembly with Nut - Fit for Troy Bilt Pony Mower - TB42 Bronco 42" Mower Deck, MTD Crafts Man T1000 T1200 T1400 T1800, Hus kee LT4200 Series (2 Pack)

What It Is

This is a replacement spindle assembly (with mounting nut) for the cutting blades on 42-inch MTD/Craftsman/Troy-Bilt lawn tractors. It’s sold as a 2-pack, intended for decks that use two spindles (a standard setup on many residential tractors). The assembly includes the spindle shaft, housing, and bearings pre-installed.

Fitment & Compatibility

Before buying, verify these three things:

• Deck size: This fits 42-inch mower decks only. Measure your deck width or check your model number.
• Brand/model: Direct fit for Troy-Bilt Pony, TB42 Bronco, and Craftsman T1000–T1800 series. Also fits Huskee LT4200. It’s an aftermarket replacement for OEM part numbers 918-06991 and 618-06991.
• Physical check: Measure the spindle shaft diameter (typically 1 inch) and bolt pattern (usually 4 bolts on a 3-inch square pattern). Compare with your old spindle before ordering.

If your deck uses three spindles, you’ll need a third unit (sold separately).

Key Things to Know

• Quality: Solid aftermarket build with pre-greased bearings. Most users report it lasts 1–2 seasons under normal residential use.
• Installation: Moderate difficulty. Requires removing the blade, belt, and pulley, then unbolting the old spindle. A socket set, torque wrench, and penetrating oil (for rusty bolts) are recommended.
• Gotcha: The included nut fits the spindle shaft, but you may need a new blade bolt (not included). Check your blade bolt size before starting.
• Noise: Some users note a slight whine after installation—this is normal for new bearings and usually fades after a few hours.

Should You Buy It

If you own a 42-inch Troy-Bilt, Craftsman, or Huskee tractor with a two-spindle deck, and your spindle is wobbling, noisy, or has damaged bearings, this is a cost-effective, reliable replacement. It’s not meant for zero-turn or commercial mowers, but for standard residential use, it’s a solid value at this price.