John Deere UC22009 Mower Blades 3-Pack 48" Deck GX 325 335 345 X 300 320 324 500 LT 180 Z 425

What It Is

The John Deere UC22009 is a set of three OEM replacement mower blades designed for 48-inch cutting decks on select John Deere lawn tractors and zero-turn mowers. These are high-lift blades intended for mulching and bagging grass clippings, not for rough terrain or heavy debris.

Fitment & Compatibility

Before buying, confirm your deck is exactly 48 inches (measured blade tip to tip, not deck housing width). This 3-pack fits John Deere models including the GX 325, 335, 345, X 300, X 320, X 324, 500 series, LT 180, and Z 425. It replaces OEM part numbers UC22009, AM142702, and AM137322. Measure your existing blade length (should be 20.5 inches), center hole diameter (1 inch), and thickness (0.25 inch). This set does not fit 42-inch or 54-inch decks. Check your model number on the frame or under the seat—not just the series name—to avoid mismatches.

Key Things to Buy

• Quality: These are genuine John Deere blades, not aftermarket. They come pre-sharpened and coated for rust resistance. Expect consistent balance and edge retention for 20–30 hours of normal use.
• Installation: Moderate difficulty. You’ll need a socket wrench, torque wrench (set to 70–90 ft-lbs), and safety blocks. Always disconnect the spark plug and drain the gas tank if tilting the mower.
• Common Gotchas: The blades are “high-lift” so they work best for mulching/bagging—not for side-discharge on wet or tall grass. They can bog down the engine if the grass is thick. Also, the 3-pack is a single-size set; if your deck uses a staggered blade pattern (some 48-inch decks do), verify that all three are identical length before buying.
• Lift Direction: Double-check the air lift orientation matches your old blades. These are designed for clockwise rotation (viewed from the top). Installing backward will reduce cut quality and stress the spindle.

Should You Buy It

If you own one of the listed 48-inch John Deere models and need OEM-quality blades for routine mulching or bagging, this 3-pack is a solid value at $45.48. It’s not for heavy-duty mowing or rocky yards—consider aftermarket “low-lift” or “mulching” blades for those conditions. For standard residential lawns, these deliver sharp, balanced cuts and easy installation with the right tools.