NIDAIFEI Spindle Assembly 2-Pack for 42-inch Mower Decks — AM144608 with UC26511 Pulley, Pre-greased Sealed Bearings

NIDAIFEI's 2-pack AM144608 spindle assembly with UC26511 pulley is a ready-to-install replacement kit engineered to fit many 42" mower decks and restore reliable blade rotation.

If your mower's cutting performance has slipped, worn spindle bearings or a damaged pulley are common culprits. This kit bundles two fully machined spindle housings with pre-greased, double-sealed bearings and two matching UC26511 pulleys, plus the mounting hardware you need. It’s made from aluminum alloy with Grade 5 fasteners and CNC precision, offering an OEM-compatible, budget-conscious alternative for routine deck repairs.

Which mower models and decks will this spindle assembly fit?

This 2-pack is designed to match OEM part AM144608 and the UC26511 pulley dimensions, making it compatible with a range of 42" ZTrak decks and lift linkages. Check your mower’s parts list or compare mounting bolt spacing and pulley ID to be sure.

• Fits Z315E (PC16401), Z320M (PC16402) and Z320R (PC16403).
• Also fits Z335E (PC12788), Z335M (PC13089), Z345M (PC13090) and Z345R (PC13091) decks.
• Pulley specs: height 0.77"; outer diameter 5.35"; bore 0.6"—verify against your original pulley.

How does the double-sealed bearing design benefit mower performance?

The spindle housings include pre-greased, double-sealed bearings to keep debris and moisture out while maintaining smooth rotation. That reduces the need for frequent maintenance and helps blades stay properly aligned under load.

• Double seals protect bearings from grass clippings and dirt.
• Pre-greased bearings are ready to install—no initial lube required.
• Corrosion-resistant materials extend service life in outdoor conditions.

Is this kit easy to install for a weekend DIYer?

Yes—NIDAIFEI includes the required mounting bolts so you won’t need to source extra hardware. Basic hand tools and a service manual are sufficient for most users; the CNC-machined threads and included fasteners streamline assembly.

• Comes with Grade 5 screws and grease zerks for maintenance access.
• CNC machining ensures smooth threads for quick bolt-up.
• Simple bolt pattern mirrors OEM layout for straightforward swap-in.

What materials and quality controls are used in this spindle kit?

The housings are cast from a high-grade aluminum alloy for a balance of strength and weight, while steel grease zerks and Grade 5 fasteners provide durable service points. Parts are CNC processed for precise tolerances, reducing play and preventing premature wear.

• Aluminum alloy housings resist rust and minimize vibration.
• CNC-machined threads and surfaces for accurate fitment.
• Factory-sealed bearings and robust fasteners meet practical OEM standards.

Who this is for: This NIDAIFEI spindle and pulley 2-pack suits homeowners, landscapers, and small-fleet operators looking for a cost-effective OEM-compatible replacement for worn spindle assemblies on 42" ZTrak decks. It’s ideal for anyone who wants a durable, pre-greased spindle set that installs with common tools and restores cutting performance without paying for full-brand OEM pricing. Always confirm part numbers and pulley dimensions against your mower before purchasing to ensure fitment.