M145476 High Lift Blades for 48" Deck, M127500 Mower Blades Compatible with John Dee-re X300 X320 X350 Z425, Replaces M127673 M146715 AM141907 AM148663, 3 Pack

What It Is

This is a 3-pack of high-lift mower blades (OEM part M145476) designed for 48-inch cutting decks. High-lift blades create stronger upward airflow for improved grass clipping discharge and bagging performance, making them ideal for thick or wet grass.

Fitment & Compatibility

Deck size: Fits only 48-inch (122 cm) decks. Measure your deck’s cutting width before buying.

Compatible models: John Deere X300, X320, X350, Z425, and other select models using a 48″ Edge or 7-Iron deck. Also fits many 48″ decks on X500, X700, and Z500 series.

OEM replacements: Replaces John Deere parts M127673, M146715, AM141907, AM148663. This is an aftermarket blade – not genuine John Deere, but matches OEM dimensions.

Measurements: Blade length is 21-1/8″ (center hole to tip), width 2-1/2″, center hole diameter 7/8″. Verify these match your existing blades.

Check before buying: Confirm your deck model number and blade hole pattern. Some 48″ decks use different blade shapes (e.g., low-lift or mulching). High-lift blades may not fit decks with restricted discharge chutes.

Key Things to Know

• Installation difficulty: Easy – requires a 15/16″ socket and torque wrench (recommended 50-60 ft-lbs). Wear gloves; blades are sharp.
• Performance: High-lift design throws clippings farther and fills bags more fully, but can leave streaks in dry, thin grass. Not ideal for mulching.
• Durability: Aftermarket steel – expect slightly shorter lifespan than OEM (approx. 25-30 hours of use before dulling). Check for bending or cracking after hitting rocks.
• Common gotcha: High-lift blades increase deck wear and vibration if not balanced. Always balance new blades before installing (use a $10 blade balancer).

Should You Buy It

Buy this if you have a 48″ John Deere deck and need better bagging or side-discharge performance, especially in thick or damp grass. Avoid if you primarily mulch or have a smaller/larger deck. At $29.99 for three blades, it’s a solid value for the performance boost over standard blades.