50 inch Mower Deck Rebuild Kit for Cub Cadet RZT 50 LT1050 LTX1050 ZT1-50 Includes 3 Spindle 918-04126B, 618-04126, 3 Blade 942-04053C 742-04053, 1 Be lt 754-04044

What It Is

This is a complete rebuild kit for 50-inch mower decks on select Cub Cadet and MTD-built lawn tractors. It includes three spindle assemblies, three blades, and one drive belt—everything needed to restore cutting performance and replace worn spindles in one purchase.

Fitment & Compatibility

Required check: This kit is designed for a 50-inch fabricated deck, not a stamped deck. Confirm your deck measures 50 inches across and that your model is listed: Cub Cadet RZT 50, LT1050, LTX1050, or ZT1-50. Also fits some MTD models with the same deck.

Part numbers to verify:

• Spindles: 918-04126B or 618-04126 (OEM replacements)
• Blades: 942-04053C or 742-04053 (OEM cross-reference)
• Belt: 754-04044 (OEM number)

Measure before buying: Spindle bolt pattern is 3.5 inches center-to-center. Blade length is 16.5 inches, with a 1-inch center hole and 0.5-inch offset. Belt is 1/2-inch wide by 95.3 inches outside length. If your deck uses different spindle spacing, blade hole size, or belt length, this kit won’t fit.

Key Things to Know

• Quality concerns: The 3.4-star rating (9 reviews) suggests inconsistent fit or durability—some users report premature spindle bearing failure or blades that don’t balance well. Inspect spindles for smooth rotation before installation.
• Installation difficulty: Moderate. Requires removing deck, swapping spindles, and replacing belt/blades. Have a impact wrench for spindle bolts and a torque wrench (specs: spindle nut 40-50 ft-lbs, blade bolt 70-90 ft-lbs).
• Common gotcha: The belt may be slightly tight on some decks. If it won’t route easily, check deck pulley alignment—don’t force it. Also, blades may need sharpening out of the box; they’re often dull.
• Aftermarket vs OEM: This is an aftermarket kit, not genuine Cub Cadet. OEM parts cost roughly 2x but offer better consistency. If you need reliability for heavy use, consider OEM spindles separately.

Should You Buy It

Buy this kit if you have a 50-inch Cub Cadet fabricated deck and want a low-cost, all-in-one refresh for light to medium residential use. Skip it if you mow commercially, need guaranteed durability, or have a stamped deck—then invest in OEM spindles and blades individually.