Sumglicie 19" Replacement Mower Blades for John Deere 54" Deck (3-Pack) — 7/8" Hole, 40MnB Hardened Steel

The Sumglicie 396-769 is a heavy-duty three-pack of 19" replacement mower blades engineered to restore cutting performance on John Deere 54" decks and compatible Oregon Gator G6 models.

If your 54-inch mower deck is leaving uneven patches, poor bagging, or weak discharge, these Sumglicie blades are made to match OEM fit and improve airflow and mulching. Crafted from 40MnB hardened steel with a reinforced profile and a 7/8" center hole, the 396-769 blades replace a wide range of part numbers — including M135334, M136195 and M144652 — so installation is straightforward for many John Deere and Gator decks.

Will these blades fit my John Deere 54" mower deck?

These blades are designed specifically for 54" decks with the 7/8" center hole and the OEM-style blade length and mounting configuration. They list direct replacements for several John Deere numbers and common aftermarket references for quick compatibility checks.

• Fits many John Deere 54" models: X710, X730, X734, X738, X739, X750, X754, X758, and more.
• Replaces part numbers: M135334, M136195, M144652, M164016, TCU30316, TCU30317.
• Mounts with a 7/8" center hole and 19" blade length typical of 54" decks.

How do these blades affect bagging, mulching, and discharge?

Sumglicie shaped the cutting edge and profile to increase lift and improve airflow through the deck, which enhances bagging and keeps clippings moving for cleaner side discharge. The mulching geometry finely chops grass clippings, often reducing the need to bag, while the extended cutting surface gives a more consistent cut across the deck.

• Aggressive blade angle increases air lift for better bag filling.
• Mulching design chops clippings into finer pieces to reduce visible residue.
• Longer cutting edge improves deck coverage and reduces missed strips.

What are these blades made of and how durable are they?

Manufactured from 40MnB alloy steel, these blades are heat-treated to hold an edge longer under normal lawn-care conditions. The reinforced width and increased thickness create a stronger lifting arch and resist bending or rapid wear when mowing typical residential and light-commercial turf.

• 40MnB hardened steel for extended edge life.
• Reinforced cross-section to resist warping and impact damage.
• Optimized grinding and edge geometry for consistent cutting performance.

How simple is installation and what should I check when replacing blades?

Installation is straightforward if your mower uses a standard 7/8" center bolt and 19" blade length for the 54" deck. Always follow the mower manufacturer’s torque and safety instructions: disconnect spark plugs, block the wheels, and ensure blades are rotated to the correct orientation before tightening.

• Unbolt the old blades with proper safety precautions and tools.
• Match blade orientation and center-hole alignment to the spindle.
• Tighten to manufacturer torque spec and retorque after first use if advised.

Who this is for: landscapers, grounds crews, and homeowners with John Deere 54" mower decks or compatible Oregon Gator G6 machines who need a reliable, longer-lasting blade that improves bagging, mulching, and overall cutting coverage. The 3-pack is ideal for full deck replacement or keeping spares on hand for mid-season swaps.