50-Inch Deck Spindle Assembly For Cub Cadet, Mtd, And Troy-Bilt – Oem 618-04129

Description

This spindle assembly fits select Cub Cadet and MTD 50″ mower decks, including models from Troy-Bilt, Yard Machines, Yard-Man, and White Outdoor. Built for long-lasting performance, it features a 4-bolt housing, pre-installed pulley, and a 6-point star blade shaft designed for nut-secured blade installation.

Replaces OEM Part Numbers:

Cub Cadet & MTD:

• 618-04129A

• 618-04129B

• 918-04129A

• 918-04129B

Aftermarket Equivalents:

• Rotary: 11963

• Stens: 285-842

• Sierra: 70-03187

• Oregon: 82-412

Compatible Models

Cub Cadet:
GT1050, GT1554, LGT1050, LGTX1050, RZT50, RZT54
LT1050 (2007 and earlier), SLT1554 (pre-2007)

MTD:
Yard Machines and Yard-Man models with 50″ and 54″ decks

White Outdoor:
GT and ZT series with 50″ and 54″ decks

Troy-Bilt:
Super Bronco 50, Mustang 50, Mustang 54

Key Features:

• Fits most MTD-manufactured 50″ mower decks

• 6-point star shaft accepts nut-secured blades

• 4-bolt mounting pattern for easy installation

• Pulley pre-installed

• Grease fitting included for maintenance

• Ideal for zero-turn and lawn tractor applications

Why Choose This Replacement?

• Built to OEM specs for durability and performance

• Compatible with a wide range of 50″ and 54″ decks

• Easy to install – perfect for DIY repairs and shop rebuilds

• Trusted across Cub Cadet, MTD, Troy-Bilt, and more

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