UDC Parts M145476 UC22009 Mower Blades Replacement for John Deere 48 Inch X350 X300 X500 Z425 Z325E X330 Z530M X580 X570 X380 Z355E X940 X948 X949 M127500 M127673 Ztrak Zero‑Turn / 3 Pack High Lift

What It Is

This is a 3-pack of high-lift mower blades designed for 48-inch John Deere lawn tractors and zero-turn mowers, including select X300, X500, Z500, and Z300 series models. They replace OEM part numbers M145476, UC22009, M127500, and M127673, and are intended for users who want better grass lift and discharge in thick or tall grass conditions.

Fitment & Compatibility

Before buying, confirm your mower has a 48-inch deck—this pack will not fit 42-inch or 54-inch decks. Measure your blade length: these are 20.5 inches long, with a 1-inch center hole and a 0.5-inch diameter hub. They fit most John Deere stamped steel 48-inch decks on models like the X350, X300, X500, Z425, Z325E, X330, Z530M, X580, X570, X380, Z355E, X940, X948, and X949. Also compatible with Ztrak zero-turn models. If your deck uses a different spindle or blade offset (e.g., mulching or low-lift), these will not work. Double-check your OEM part number against the list above.

Key Things to Know

• High-lift design improves grass clipping discharge and bagging performance, but increases engine load and can leave windrows if mowing wet grass.
• Installation is straightforward—use a torque wrench to tighten the blade bolt to 40-50 ft-lbs. No special adapters needed.
• Sharpness out of box is good but not razor-sharp; a quick touch-up with a file before first use is recommended for best cut quality.
• These are aftermarket blades—they match OEM dimensions and thickness (0.203 inches), but may have slightly different balance. Check balance before installing to avoid vibration.

Should You Buy It

If you own a 48-inch John Deere lawn tractor or Ztrak mower and need high-lift blades for better bagging or discharge in dense grass, this 3-pack offers solid value at roughly $13 per blade. It’s a reliable aftermarket alternative to OEM, with strong user reviews confirming fit and durability for residential use.