John Deere Original Equipment 3 Blades #TCU30315(3)

What It Is

This is a set of three OEM replacement blades for John Deere mower decks, designed for medium-duty residential cutting. The #TCU30315(3) blades fit 48-inch and 54-inch Edge, Quick-Connect, and Accel Deep mower decks commonly found on X300, X500, and X700 series tractors.

Fitment & Compatibility

Before buying, verify your deck model (not just tractor model) by checking the deck underside for a stamped part number. These blades are for 48-inch and 54-inch decks with a 3-blade spindle configuration—they will not fit 42-inch or 60-inch decks. Measure your existing blade length (should be 18.5 inches for 48-inch decks or 20.5 inches for 54-inch decks), center hole diameter (must be 1 inch), and thickness (0.203 inches). Confirm your spindle bolt pattern matches the three-hole design. These are OEM John Deere, so they bolt directly onto compatible decks without modification. Aftermarket blades may differ in thickness or hole alignment, so stick with OEM if you want guaranteed fit.

Key Things to Know

• Quality: OEM blades are heat-treated and balanced for longer edge life and less vibration than most aftermarket options. Expect 25-50 hours of cutting before noticeable dulling on typical grass.
• Installation: Easy—remove the old blades with a 15/16-inch socket or wrench. Torque bolts to 35-40 ft-lbs. Use a blade removal tool or wedge a block of wood against the blade to prevent spindle rotation.
• Common Gotcha: These blades are not universal. If your deck uses a different spindle bolt pattern (e.g., two-hole or star-shaped), these won’t work. Also, always replace all three blades as a set to maintain balance—mixing old and new causes vibration.
• Sharpening: Can be sharpened 2-3 times, but replace if bent, cracked, or if the cutting edge is worn more than 1/4 inch from the original profile.

Should You Buy It

Buy this if you own a John Deere X300/X500/X700 series with a 48-inch or 54-inch 3-blade deck and want a drop-in, no-hassle replacement that matches factory performance and durability. It’s ideal for homeowners who mow 1-3 acres weekly and prefer OEM reliability over saving a few dollars on aftermarket blades that may not fit or last as well.