46" Deck Spindle Assembly for MTD Cub Cadet 918-06977 618-06977 for XT1-LT46 XT2-LX46 KH EFI FAB T3100 T8200 T8600 T240 TB2246 Replace 918-06977A 618-06977A

What It Is

This is a complete 46-inch deck spindle assembly designed for MTD and Cub Cadet lawn tractors. It drives the blade on the left or center position of the deck, replacing worn OEM units (918-06977, 618-06977) and their A-variants on select XT1, XT2, and T-series models.

Fitment & Compatibility

Before buying, confirm your mower has a 46-inch fabricated or stamped deck—this spindle fits both. Check your model number against these compatible series: Cub Cadet XT1-LT46, XT2-LX46, KH EFI FAB, T3100, T8200, T8600, T240, and TB2246. Also fits some Troy-Bilt, Craftsman, and MTD units using the same 918-06977 pattern.

Measure the mounting bolt pattern: three bolts on a 4-inch center (common on these decks). The spindle shaft is 0.625-inch (5/8") diameter with a keyway—measure your blade hole to match. If your deck uses a different bolt pattern or shaft size (e.g., 0.75-inch), this won’t work.

OEM vs aftermarket: This is an aftermarket replacement, not genuine Cub Cadet. It fits the same housing and uses the same bearings, but verify the housing height matches your original (about 3.5 inches tall). Swap the old pulley if needed—it’s not included.

Key Things to Know

• Quality: 4.9/5 rating from 17 reviews suggests consistent fit and durability. Bearings are sealed and pre-greased.
• Installation difficulty: Moderate. You’ll need a socket set (3/8" or 1/2" drive), a wrench for the blade bolt, and possibly a puller for the old spindle. Expect 30–60 minutes per spindle.
• Gotchas: The pulley bolt is not included—reuse your original. Also, check the deck housing for cracks or worn bearing pockets before installing; a new spindle won’t fix a deformed housing.
• Warranty: No info, but the price point makes it a low-risk replacement.

Should You Buy It

Yes, if your 46-inch Cub Cadet or MTD deck has a worn or noisy spindle (blade wobble, grinding, or uneven cut). It’s a direct-fit, budget-friendly replacement for a common failure point, and the strong rating indicates it holds up well. Skip it if you need a genuine OEM part for warranty or if your deck uses a different spindle size.