50 Inch Mower Deck Fit for Cub Cadet MTD XT1 LT50 XT2 LX50 XT1-LT50 XT2-LX50 XT1-50 XT2-50 MTD CYT5023SE Lawn Mower Parts Replace OEM 918-06981 618-06981 Spindle Assembly

What It Is

This is a replacement spindle assembly for the 50-inch mower deck on Cub Cadet XT1, XT2, and LX50 series tractors, as well as select MTD models. It drives the mower blade and supports the belt pulley, essential for cutting performance.

Fitment & Compatibility

Before buying, confirm your deck is exactly 50 inches (measured blade tip to blade tip). This spindle fits Cub Cadet XT1-LT50, XT2-LX50, XT1-50, XT2-50, and MTD CYT5023SE models. It replaces OEM part numbers 918-06981 and 618-06981. Measure your spindle housing diameter (typically 3.5 inches) and shaft length (around 4.5 inches) to match. Check that your deck uses a standard 5/8-inch hex shaft for the blade—this spindle has that. If your mower has a different deck size (e.g., 46 or 54 inches), this won’t fit.

Key Things to Know

• Quality: This is an aftermarket part, not OEM. At $27.99, it’s cheaper than Cub Cadet’s original ($40-50). Reviews note it works fine but may have slightly looser tolerances.
• Installation: Moderate difficulty—requires removing the deck, unbolting the old spindle (3 bolts), and swapping the pulley and blade. Have a torque wrench; spindle bolts should be tightened to 20-30 ft-lbs.
• Common Gotcha: The bearing may need greasing before use (some units come dry). Also, the included bolts may be low-grade—reuse your OEM hardware if possible.
• Lifespan: Expect 1-2 seasons of regular use. If you mow heavy grass or hit debris often, OEM spindles last longer.

Should You Buy It

Buy this if you need a budget-friendly replacement for a worn spindle on a 50-inch Cub Cadet XT1/XT2 deck and are comfortable with basic mechanical work. It’s a good stopgap for occasional use, but if you mow professionally or want maximum durability, stick with the OEM part.