918-06977A 618-06977 Spindle Assembly Fit for 46 Inch Deck Cub Cadet XT1-LT46 XT2-LX46 LT46 LX46 RZT L46 Craftsman T240 T225 T8200 T8600 T3100 T2800 MTD Troy-Bilt TB2246 Lawn Mower Parts

What It Is

This is a replacement spindle assembly for the 46-inch stamped-steel decks found on many Cub Cadet, Craftsman, MTD, and Troy-Bilt lawn tractors. It houses the blade spindle and bearings, and you need one when your deck vibrates, makes grinding noises, or the blade won’t spin freely.

Fitment & Compatibility

Before buying, confirm your deck is a 46-inch stamped (not fabricated) deck. This spindle fits Cub Cadet XT1-LT46, XT2-LX46, LT46, LX46, RZT L46, Craftsman T240, T225, T8200, T8600, T3100, T2800, and Troy-Bilt TB2246 models. Also fits many MTD Gold and Silver series with the same deck. Measure the spindle bolt pattern: it should be 3.75 inches center-to-center (three bolts). The spindle shaft is 0.75 inches diameter with a 5/16-inch hex for the blade bolt. If your deck uses a different bolt pattern or shaft size, this won’t work. This is an aftermarket part, not OEM Cub Cadet, but it’s a direct replacement for OEM part numbers 918-06977A and 618-06977.

Key Things to Know

• Quality: Users report it’s comparable to OEM for the price. Bearings are sealed but not heavy-duty; expect 2-3 seasons of normal residential use.
• Installation: Moderate difficulty. Requires removing the deck, the old spindle (three bolts and a blade), then transferring the pulley and blade to the new spindle. A torque wrench (40-50 ft-lbs for blade bolt) is recommended.
• Common gotcha: The spindle housing is painted—if the paint is thick, the pulley may not slide on easily. Lightly sand the shaft if needed.
• Check belt alignment: After installing, verify the pulley lines up with the other spindles and the deck belt path. A misaligned pulley causes belt wear or throwing.

Should You Buy It

If you have a 46-inch stamped deck on one of the listed Cub Cadet, Craftsman, MTD, or Troy-Bilt tractors and need a reliable, budget-friendly replacement for a worn or noisy spindle, this is a solid choice. It won’t outlast OEM, but for $30 it’s a practical fix for residential mowing. Skip it if you have a fabricated deck, a different deck size, or need heavy-duty commercial use.