8TEN Spindle for Cub Cadet & MTD mower decks — 46" 6-Point Star Center, 6.75" Height, 5.625" Pulley

The 8TEN spindle is a direct-fit deck spindle assembly designed to replace worn or damaged spindles on select Cub Cadet and MTD lawn tractors.

When a mower blade vibrates, the deck hums, or cutting performance drops, the spindle is often the culprit. This 8TEN replacement matches the original equipment form and fit for multiple Cub Cadet and MTD part numbers, giving you a cost-effective way to restore deck stability and consistent blade rotation without modifying the deck.

Which mower models and OEM numbers does this spindle fit?

This spindle is engineered to be compatible with many Cub Cadet and MTD applications. It covers a range of OEM part numbers across the 618 and 918 families and also fits selected MTD White tractors.

• Compatible with OEM numbers: 618-04137, 618-04137A, 618-0625, 618-0625A, 618-0625B, 618-0990B.
• Also replaces 918-series parts including 918-04137 and 918-0625B/918-0660 variants.
• Listed fit for MTD White LT2200 (13A6606H790) 2004 models.
• Fits Cub Cadet LT1045 and LT1046 46" decks and many 2007-and-earlier models using the special 6-point star center hole.

What are the key physical specifications and what should I check before buying?

Knowing the spindle's dimensions and mounting style ensures a correct replacement. This 8TEN unit has a specific height and pulley diameter—confirm these against your existing spindle before purchase.

• Spindle overall height: 6 3/4 inches, matching many factory assemblies for 46" decks.
• Pulley outer diameter: 5 5/8 inches; important for belt alignment and routing.
• Uses a 6-point star center hole on compatible Cub Cadet decks—verify your deck's center configuration.
• Does not include blade mounting hardware; reuse your current bolts or buy OEM replacements if needed.

How does replacing the spindle affect mower performance and safety?

A worn spindle can cause uneven cuts, vibration, and excessive belt wear. Replacing it restores correct blade rotation, reduces vibration, and helps maintain even deck height, contributing to safer and more predictable mowing.

• Restores firm blade attachment and reduces wobble that causes uneven cuts.
• Improves belt alignment to prevent slipping and premature belt wear.
• Reduces vibration transmitted to the tractor for more comfortable operation.
• Proper installation helps maintain deck-level accuracy for consistent cut height.

What should I expect during installation and maintenance?

Installation is straightforward for users familiar with mower deck service, but some basic tools and safety precautions are required. If you are unsure, consult a service manual or a professional technician for torque specs and proper reassembly.

• Remove deck and blades before beginning; wear cut-resistant gloves and eye protection.
• Inspect spindle bearings, pulley alignment, and spindle housing for wear or damage.
• Reuse blade-mount hardware if undamaged; purchase replacement bolts if stripped or corroded.
• Check belt routing after installation and test at low speed to confirm smooth operation.

This 8TEN spindle provides a reliable replacement option when original spindles show play, noise, or visible damage. It reproduces the OEM height and pulley diameter for a trouble-free swap and is a practical choice for do-it-yourself maintenance or professional shop repairs.

Who is this for? DIY lawn tractor owners and small repair shops who need a dependable, OEM-compatible spindle for Cub Cadet and select MTD/White models. If you maintain LT1045/LT1046 46" decks or earlier Cub Cadet machines and need the correct 6-point star center fit with the specified dimensions, this spindle is designed for your application.