UDC Parts Spindle Assembly Replacement for Cub Cadet 918-04426 — OEM-Fit 3" Height, Includes Mounting Hardware

UDC Parts 918-04426 is a complete spindle assembly replacement engineered to restore cutting performance on compatible Cub Cadet decks.

If your mower is producing uneven cuts, excessive vibration, or squealing from the deck area, a worn or damaged spindle assembly is often the culprit. This UDC Parts unit replaces a long list of original equipment numbers and arrives with mounting hardware and a pulley lock nut so you get an almost-ready-to-install kit. Built to match the dimensions and mounting pattern of many Cub Cadet decks, it’s a practical choice for owners of residential and light-commercial machines needing a reliable replacement spindle.

How does this spindle assembly fix mowing problems?

Replacing a failing spindle assembly stops wobble, reduces blade runout, and eliminates abnormal noise caused by worn bearings or bent shafts. The assembly restores correct blade alignment and keeps the deck spinning true, which leads to an even, cleaner cut across the lawn.

• Includes one spindle, four mounting bolts, blade bolt, pulley lock nut, and washer for a full hardware set.
• 3" overall height and 5" (127mm) outer diameter match OEM dimensions for proper fit.
• Precision-machined hub and shaft minimize vibration and blade wobble.

Which models and OEM numbers does this replace?

This replacement is designed to substitute for many original part numbers used across Cub Cadet and related brands, making it a versatile spare part. If your mower lists any of the listed OEM references, this spindle is a direct-fit alternative that avoids modifying the deck.

• Replaces MTD/ Cub Cadet OEMs such as 918-04426, 618-3129, 918-3129C, 918-04394 and more.
• Compatible with models like Cub Cadet 1515, 2130, 2146, 2155, 2164, 2166 and select LT/GT series.
• Fits deck sizes 38", 42" and 44" and zero-turn decks ZT-1850 and ZTR 247250030.

What are the installation and durability details?

The spindle ships with the key mounting hardware to simplify installation; however, typical mechanical experience and basic shop tools are recommended. Constructed from durable materials with attention to bearing fit, this assembly is made to withstand residential mowing loads and frequent startups.

• Supplied hardware reduces the number of separate parts to source before installation.
• Robust bearing seating and corrosion-resistant finishes extend operational life.
• Follow manufacturer torque specs and safety precautions when replacing spindles and blades.

How will I know this part is the right size for my deck?

Confirming fit is quick: check the OEM number stamped on your old spindle or compare key measurements such as overall height and the 5" outer diameter. If your mower’s parts list includes any of the OEM references provided, the UDC Parts spindle is intended as a compatible replacement.

• Measure existing spindle height (3") and hub outer diameter (5"/127mm) to verify match.
• Cross-check the model numbers listed for Cub Cadet zero-turns and lawn tractors.
• Contact UDC Parts customer support if you need help confirming compatibility.

Who is this for: Lawn mower owners, DIY mechanics, and small-fleet operators who maintain Cub Cadet decks and need a dependable, ready-to-install spindle replacement. If you prefer to replace components yourself and value a complete kit that mirrors common OEM specs, this UDC Parts spindle assembly provides the parts and dimensions needed to return your mower deck to stable, quiet operation.