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:
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618-04129A
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618-04129B
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918-04129A
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918-04129B
Aftermarket Equivalents:
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Rotary: 11963
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Stens: 285-842
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Sierra: 70-03187
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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:
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Fits most MTD-manufactured 50″ mower decks
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6-point star shaft accepts nut-secured blades
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4-bolt mounting pattern for easy installation
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Pulley pre-installed
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Grease fitting included for maintenance
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Ideal for zero-turn and lawn tractor applications
Why Choose This Replacement?
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Built to OEM specs for durability and performance
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Compatible with a wide range of 50″ and 54″ decks
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Easy to install – perfect for DIY repairs and shop rebuilds
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Trusted across Cub Cadet, MTD, Troy-Bilt, and more
