46 Inch 918-06977A 918-06977 Deck Spindle Assembly Fits For Cub Cadet XT1 LT46 XT2 LX46 RZT L 46 Craftsman T240 T8200 T3100 MTD Troy Bilt 46 Replace 618-06977a 618-06977 Mower Spindle parts

What It Is

This is a complete deck spindle assembly designed for 46-inch mower decks on select Cub Cadet, Craftsman, MTD, and Troy-Bilt models. It houses the bearings and pulley that drive the blade, replacing worn or seized spindles that cause uneven cutting, vibration, or blade wobble.

Fitment & Compatibility

Before buying, verify your mower has a 46-inch stamped deck, not a fabricated deck. This assembly fits Cub Cadet XT1 LT46, XT2 LX46, RZT L 46, and Craftsman T240, T8200, T3100 series, plus matching MTD and Troy-Bilt 46-inch decks. It replaces OEM part numbers 918-06977A, 918-06977, 618-06977A, and 618-06977. Measure the spindle housing diameter (typically 2.5 inches) and bolt pattern (three bolts, 3.5-inch center-to-center). Check your deck’s spindle mounting flange thickness—this assembly uses a 0.125-inch thick flange. If your deck uses a different flange thickness, you’ll need a different spindle.

Key Things to Know

• Quality vs OEM: This is an aftermarket replacement. It uses standard bearings (6202-2RS) that are serviceable but may not last as long as genuine Cub Cadet spindles under heavy use. Expect 1–2 seasons on a residential mower.
• Installation difficulty: Moderate. You’ll need a socket set, a puller to remove the old spindle pulley, and a torque wrench (pulley nut: 45–55 ft-lbs). The spindle bolts are often rusted—use penetrating oil.
• Common gotcha: The included pulley may have a different offset than your original. Check that the belt aligns with the other spindles before tightening everything down. If not, reuse your old pulley.
• Bearing preload: Over-tightening the spindle nut can crush the bearings and cause rapid failure. Tighten until snug, then back off 1/8 turn.

Should You Buy It

Buy this if you have a 46-inch residential mower and want a budget-friendly fix for a wobbly or noisy spindle. It’s a solid value for DIY homeowners who can handle basic mechanical work. Skip it if you mow commercially or need OEM-level durability—spend the extra $20 for a genuine Cub Cadet assembly.