8TEN Spindle for Cub Cadet MTD Craftsman Troy Bilt ZT1 ZTS1 42 Z5200 Mustang Z42 42-Inch Deck 618-09260 618P09260

What It Is

This 8TEN replacement spindle assembly is designed for 42-inch cutting decks on popular residential zero-turn mowers like Cub Cadet ZT1/ZTS1, Craftsman ZT 7000, Troy-Bilt Mustang Z42, and MTD models. It drives the blade rotation and supports the deck belt pulley system.

Fitment & Compatibility

• Deck size: Fits only 42-inch (42”) decks, not 46”, 50”, or 54” models.
• OEM cross-reference: Replaces Cub Cadet/MTD part numbers 618-09260 and 618P09260. Verify your original part number before ordering.
• Brand fit: Compatible with Cub Cadet ZT1/ZTS1 (2016-2021), Craftsman ZT 7000, Troy-Bilt Mustang Z42, and select MTD 42” zero-turn mowers. Not for push mowers or tractors.
• Measurements: Shaft diameter is 5/8” (0.625”). Housing bolt pattern is 3.5” center-to-center. Confirm your deck spindle mounting hole spacing matches.
• Aftermarket note: This is an aftermarket replacement, not OEM. Build quality is good, but tolerances may differ slightly from factory parts.

Key Things to Know

• Installation difficulty: Moderate. Requires removing the deck, belt, blade, and pulley. Basic hand tools (socket set, torque wrench) and a jack or lift recommended.
• Common gotcha: The 8TEN spindle uses a different bearing seal design than OEM. Some users report slightly looser fit on the pulley; use thread locker on the pulley bolt.
• Durability: Grease-sealed ball bearings are adequate for homeowner use (1-2 acres). Not designed for commercial daily use—bearings may fail sooner under heavy load.
• Check blade bolt torque: Tighten to 40-50 ft-lbs. Overtorquing can warp the spindle housing or strip threads.

Should You Buy It

If you own a 42” Cub Cadet ZT1 or similar zero-turn and need a budget-friendly replacement for a worn or noisy spindle, this 8TEN unit is a solid value. It’s not built for pro-level abuse, but for residential mowing it’ll restore smooth blade operation without paying OEM prices. Just measure your bolt pattern and verify part numbers before buying.