8TEN Deck Spindle for Exmark/Toro 42/48/52-Inch decks — direct-fit replacement, includes blade hardware

8TEN deck spindle engineered to replace Exmark/Toro OEM spindles for 42, 48 and 52-inch mower decks, delivering a direct-fit spindle assembly with blade mounting hardware included.

This replacement spindle from 8TEN is designed as a direct-fit component for a range of Exmark and Toro residential and commercial mower decks. It matches multiple OEM part numbers so you can swap the worn or damaged spindle without modifying the deck. The assembly is sized and prepped to restore blade attachment and rotational support on compatible decks while saving time on sourcing separate hardware.

Which mower models and OEM numbers does this spindle fit?

This spindle replaces several Exmark and Toro part numbers and fits specific Quest and Titan deck models. Check your mower’s parts list or the old spindle’s stamped number to confirm compatibility before ordering.

• Compatible OEM part numbers: Exmark/Toro 116-5712, 116-3497, 109-8744, 109-6394, 121-5681, 116-5138
• Fits Exmark Quest QST20BE422 (42-inch deck)
• Fits Exmark Quest QST22BE482, QST23KC482 and Toro Titan Z4800 (48-inch deck)
• Fits Exmark Quest QST23KC522, QST24BE522 and Toro Z5200 (52-inch deck)

What are the key physical specs and what’s included in the box?

The spindle measures approximately 6.3 inches in height and includes blade mounting hardware for a straightforward replacement. It ships without a pulley and does not include a grease fitting, so confirm your deck’s lubrication setup and pulley needs before installing.

• Overall height: 6.3 inches
• Blade mounting pattern: round
• Included: blade mounting hardware (bolts, washers as required)
• Not included: pulley and grease fitting

How does installing this 8TEN spindle affect mower performance?

Replacing a worn or damaged spindle restores blade stability and helps maintain even cutting height across the deck. A properly fitted spindle reduces vibration and uneven blade wear, contributing to a cleaner cut and more predictable deck behavior.

• Re-establishes correct blade alignment and balance
• Minimizes vibration from wobbling or loose blades
• Helps prevent premature wear on belts and bearings
• Enables secure mounting with included hardware

What should I check before ordering and when fitting the spindle?

Verify the old spindle’s part number, measure clearance inside the deck, and confirm whether your deck uses a pulley or grease fitting. During installation, follow torque specs for blade bolts and inspect neighboring components like belts and mandrels for wear.

• Confirm OEM part number or measure spindle height and mounting pattern
• Ensure pulley and bearing type match your deck requirements
• Replace worn belts, idlers, and mandrel bearings during spindle replacement
• Use proper torque on blade bolts and check blade balance after install

Who is this for: This 8TEN deck spindle is for homeowners, landscapers, and mower technicians who need a dependable, direct-fit replacement for Exmark and Toro 42-, 48- or 52-inch decks. It’s aimed at anyone repairing worn or damaged spindle assemblies who wants a straightforward swap with included blade mounting hardware and compatibility across multiple OEM numbers.