JSXDNWYJ Replacement Spindle Assembly for 50" Deck Zero-Turn Mowers — 1-Pack, Fits OEM 618-06980/918-06980, Direct-Fit

Replacement spindle assembly engineered to fit 50" decks on Cub Cadet, Troy-Bilt, Craftsman and similar zero-turn mowers for reliable blade support and rotation.

If a worn or damaged spindle is affecting deck performance, this JSXDNWYJ spindle is designed as a direct-fit replacement for several popular 50" zero-turn mower models. The part replaces OEM numbers 618-06980 and 918-06980 and is supplied as a one-pack unit with aftermarket quality control. It restores blade alignment and rotational stability so your mower can cut evenly and safely when installed correctly.

Which mower models and OEM numbers does this spindle replace?

This spindle matches the OEM references and a wide set of 50" decks across brands. Cross-compatibility simplifies finding the right part for many garden tractors and zero-turns without reworking the deck.

• Replaces MTD / Cub Cadet OEM 618-06980 and 918-06980.
• Fits Cub Cadet models such as RZT-S50, RZT-SX50, XT1-GT50, ZT1-50, ZT2-50.
• Compatible with Troy-Bilt Super Bronco 50", Mustang XP 50", and related Z50 decks.
• Also works with Craftsman G8200, G8300, Z550 and some Columbia CZT-L50 variants.

How will replacing the spindle improve my mower’s cutting performance?

Changing a worn spindle removes excess play and vibration at the blade hub, which helps restore a level, consistent cut pattern and reduces stress on belts and bearings. Properly functioning spindles maintain blade pitch and clearance so grass is sheared cleanly rather than shredded.

• Reduces blade wobble that causes uneven mowing lines.
• Decreases premature belt wear and pulley noise.
• Helps maintain correct blade-to-deck clearance for even cuts.
• Restores safe, stable blade rotation at operating RPMs.

What should I check before ordering and during installation?

Verify the OEM number and measure your deck’s spindle mounting pattern to confirm fit. When installing, follow safe procedures: disconnect the spark, support the deck, and use proper torque specs; replace any seals or fasteners that show wear.

• Confirm OEM 618-06980 or 918-06980 compatibility with your deck.
• Inspect mounting bolt pattern, shaft diameter and pulley fitment.
• Replace hardware, seals, or bearings if they show damage.
• Torque fasteners to manufacturer recommendations for safety.

What aftermarket support or warranty comes with this spindle?

JSXDNWYJ provides post-sale support and responds to customer inquiries quickly. The part includes seller-supported assistance but warranty exclusions apply for misuse, improper installation, and normal wear—keep your order details for any claim verification.

• Customer service replies via Amazon Messages or email, typically within 24 hours.
• Seller warranty covers manufacturing defects, not installation damage.
• Keep receipts and photos when reporting problems for faster resolution.

Who is this for: This spindle is intended for homeowners, landscapers, and repair shops who own or service 50" zero-turn mowers from Cub Cadet, Troy-Bilt, Craftsman or similar makes and need an OEM-compatible replacement. It's useful when blades wobble, belts fail prematurely, or the deck shows uneven cutting—provided you or your mechanic can perform a safe spindle replacement or are arranging professional installation.