618-09236 618P09236 Spindle Assembly for Cub Cadet XT1-GT54 ST54, ZT1-54, ZT2-54, ZTS2-54 Craftsman Z5800 Troy Bilt Mustang 54XP MTD 54" Mower Deck Spindle with Mounting Bolts and Threads

What It Is

This spindle assembly is the rotating hub that drives the mower blade on 54-inch deck models from Cub Cadet, Craftsman, Troy-Bilt, and MTD. It replaces a worn or failed factory spindle to restore blade rotation and cutting performance.

Fitment & Compatibility

Before buying, verify these three things:

• Deck size: This fits only 54-inch mower decks. Measure your deck width to confirm.
• Model/brand: Direct fit for Cub Cadet XT1-GT54, ST54, ZT1-54, ZT2-54, ZTS2-54; Craftsman Z5800; Troy-Bilt Mustang 54XP; and other MTD 54" deck models. Check your model number against the list.
• OEM vs aftermarket: This is an OEM replacement (Cub Cadet part 618-09236 / 618P09236). It includes mounting bolts and threads, so no extra hardware needed.
• Measurements: The spindle housing diameter, shaft length, and bolt pattern are matched to factory specs. If your deck uses a different spindle (e.g., 42" or 46" decks), this won’t fit.

Key Things to Know

• Quality: OEM-grade construction with sealed bearings. The 5.0-star rating (7 reviews) suggests consistent performance and durability.
• Installation difficulty: Moderate. You’ll need basic hand tools (socket wrench, torque wrench) and the ability to remove the deck and blade. Expect 30–60 minutes per spindle.
• Common gotchas: Ensure the blade is properly torqued (typically 70–90 ft-lbs) to prevent loosening. Reuse the old blade washer if not included. If replacing one spindle, check the others for wear—they often fail at similar times.
• Thread compatibility: The spindle shaft threads match standard 5/8" blade bolt patterns (most 54" Cub Cadet/Craftsman/Troy-Bilt decks). Confirm your blade’s center hole diameter before tightening.

Should You Buy It

If you own a 54-inch Cub Cadet, Craftsman, or Troy-Bilt mower with a failing spindle—and you’re comfortable with a moderate DIY repair—this OEM replacement is a reliable, well-reviewed choice. It saves you from buying a full deck assembly and includes the necessary mounting bolts. Skip it if your deck is a different size or you need a cheaper aftermarket alternative.