918-06977 Spindle for 618-06977 for 46 Inch Deck MTD Cub Cadet XT1-LT46 XT2-LX46 T8200 T8600 T3100 T240 TB2246 Troy-Bilt Super Bronco XP 46" 618-06977A 918-06977A (2 Pack)

What It Is

This is a replacement spindle assembly (2-pack) for 46-inch MTD and Cub Cadet lawn tractor decks. It drives the blade rotation and supports the blade housing; designed for use on residential mowers with stamped steel decks.

Fitment & Compatibility

Before buying, verify these specifics:

• Deck size: Fits only 46-inch decks (not 42”, 50”, or 54”).
• Model fit: Cub Cadet XT1-LT46, XT2-LX46, T8200, T8600, T3100, T240, TB2246; Troy-Bilt Super Bronco XP 46”. Also fits MTD and Yard Machines variants with the same deck.
• OEM cross-reference: Replaces OEM part numbers 618-06977, 618-06977A, 918-06977, 918-06977A. Check your old spindle for these numbers.
• Mounting pattern: 3-bolt pattern with a 3.5-inch bolt circle. Measure center-to-center on your existing spindle bolts.
• Shaft diameter: 5/8-inch shaft. Confirm your blade has a 5/8-inch center hole.
• Bearing type: Pre-greased sealed ball bearings (no grease fitting).

Key check: Look under your deck—if the spindle housing is stamped steel with a round top plate, this is likely correct. If it’s cast iron or has a square top, it won’t fit.

Key Things to Know

• Quality: Aftermarket replacement, not OEM. Users report it’s comparable to OEM for residential use but may wear faster under heavy commercial use.
• Installation difficulty: Moderate. You’ll need a socket set, torque wrench, and likely a puller to remove the old spindle from the blade adapter. Budget 30–60 minutes per spindle.
• Common gotcha: The included bolts may be slightly shorter than OEM. Use the original bolts if possible, or add a washer to ensure full thread engagement.
• Bearing life: Sealed bearings are non-serviceable—once they fail, replace the whole spindle. Expect 2–4 seasons of normal residential mowing.

Should You Buy It

If you have a 46-inch MTD/Cub Cadet stamped deck and need a budget-friendly replacement for worn or wobbly spindles, this 2-pack is a solid value for residential use. It’s not built for commercial duty, but for typical lawn care it’ll get the job done reliably. Skip it if you need OEM-grade longevity or have a cast-iron deck.