Troy-bilt 918-06981 Deck Spindle Assembly 50 in Mower Deck

Product Description

The TROY-BILT 918-06981 is a deck spindle assembly designed for 50-inch mower decks. It includes an integrated pulley with a 5.37-inch diameter and features a star shaft configuration. The spindle assembly is the rotating hub that holds the blade and transfers power from the belt and pulley system to the cutting blade. This is an OEM-style replacement component installed by lawn equipment technicians and experienced service professionals performing deck drivetrain repairs.

This spindle assembly is suited for use on 50-inch mower decks. It is compatible with many MTD Riders and RZT zero-turn mowers equipped with 50-inch decks. The star shaft design is specific to this deck configuration and must match the blade and deck mounting pattern of the target unit. The pulley is included with the assembly. Mounting screws are not included and must be sourced separately.

Key Features

• Integrated pulley with 5.37-inch diameter eliminates the need for a separate pulley purchase
• Star shaft design for compatibility with applicable 50-inch deck configurations
• Fits many MTD Riders and RZT zero-turn platforms with 50-inch decks
• Pulley included in the assembly
• Mounting screws not included — source separately before beginning installation

Compatibility

Fits many MTD Riders and RZTs equipped with 50-inch mower decks. Confirm star shaft and pulley diameter match the existing spindle before ordering. Mounting screws are not included.

Installation Notes

Installation should be performed by a qualified lawn equipment technician with the blade and ignition system fully disabled before beginning work. Remove the mower deck and secure it on a stable work surface before extracting the old spindle assembly. Verify that the replacement spindle shaft profile and pulley diameter match the deck's drive belt routing before final assembly. Torque blade hardware to the specification listed in the equipment service manual.

Technical Specifications

• Pulley Diameter: 5.37 inches
• Shaft Type: Star shaft
• Compatible Deck Size: 50 inches
• Includes: Pulley
• Does Not Include: Mounting screws

Standard Information

• Brand: TROY-BILT
• Manufacturer Part Number: 918-06981