John Deere mower blades UC22010 3-pack — replacement for M143520, hardened carbon-boron steel, fits 42–60in decks

High-strength OEM John Deere UC22010 replacement blades (3-pack) engineered to restore cutting performance on compatible mowers and compact tractors.

These three genuine-style mower blades (John Deere part UC22010, replaces M143520) are intended for a wide range of John Deere lawn and compact tractor decks. Made from a hardened carbon-boron steel blend, they are built for edge retention and resistance to bending so your deck recovers consistent mulching and discharge performance after wear or impact. Check your operator's manual to confirm fit before purchasing.

Which machines will these blades fit?

UC22010 blades fit numerous John Deere lawn tractors, ZTrak mowers, and compact utility tractors across many deck sizes. Compatibility covers X-series, GX-series, Z-series, and several compact utility and signature models—especially decks sized 42, 44, 48, 54, and 60 inches.

• Compatible with 1023E/1025R/1026R/2025R compact tractors and many 3- and 4-series models.
• Fits GX255/GX325/GX335/GX345/GX355, and a variety of X500–X700 series decks.
• Designed for ZTrak and EZtrak zero-turn models such as Z375R, Z330/325 series, and more.
• Always cross-check your deck model and blade part number in the operator manual.

How do these blades improve cutting and deck performance?

Replacing worn or nicked blades restores a cleaner cut, reduces tearing of grass, and helps the deck move clippings efficiently. The carbon-boron construction delivers a stiff, durable edge that stays sharper longer than basic steel blades.

• Sharper edge for cleaner cuts and healthier turf appearance.
• Stiffer metal minimizes bending and vibration under load.
• Uniform geometry maintains proper airflow for mulching and bagging.
• Three-blade pack supplies enough spares for multiple decks or future replacements.

What should I check before installing these blades?

Confirm blade orientation, center hole alignment, and that your deck’s spindle and hardware are in good condition. Using the correct torque and replacing worn bolts or keyed hardware prevents slipping and ensures safe rotation.

• Verify UC22010/M143520 matches the part called for in your manual.
• Inspect spindle, blade bolt, and key for wear before fitting new blades.
• Install blades with recommended torque and correct cutting-edge direction.
• Balance blades if you feel vibration after installation.

How long will these blades last and how can I extend their life?

Blade life depends on usage, terrain, and contact with foreign objects; typical users replace blades annually or after a damaging impact. Regular sharpening, avoiding repeated strikes on hard obstacles, and cleaning after use will prolong edge life and maintain performance.

• Sharpen or rotate blades seasonally to keep an even edge.
• Avoid rocks, roots, and metal debris when mowing to reduce chips and cracks.
• Clean grass buildup and moisture from blades to limit corrosion.
• Keep a spare set (this 3-pack) on hand for timely swaps.

Who this is for: Owners and operators of John Deere lawn tractors, zero-turn mowers, and compact utility tractors who need a genuine-style replacement blade that restores cutting quality and deck airflow. This three-pack suits homeowners who maintain multiple machines, service shops replacing blades for customers, and anyone who prefers OEM-replacement geometry and material specification over generic alternatives. Always compare your tractor’s part numbers and deck size with UC22010 or the prior M143520 before ordering.