Lawn Mower Blades

Find replacement lawn mower blades by OEM part number, mower manufacturer, equipment model, deck size, blade length and center-hole pattern. Mow Town USA carries mulching, high-lift, low-lift, standard-lift and commercial replacement blades for riding mowers, zero-turn mowers and walk-behind equipment.

The most reliable way to find the correct blade is to match the original equipment manufacturer part number and your mower’s complete model number. Deck size alone is not enough because mowers with the same cutting width can use different blade lengths, center-hole patterns, mounting systems and rotation directions.

How to Find the Correct Lawn Mower Blade

Before ordering a replacement blade, confirm the following information:

• Equipment manufacturer: Verify the mower brand shown on the machine.
• Complete model number: Locate the identification label on the frame, under the seat, near the engine, on the mower deck or in the owner’s manual.
• OEM blade part number: Look for the number stamped on the old blade or listed in the equipment parts diagram.
• Deck size: Confirm the mower’s cutting width, but do not use deck size as the only fitment reference.
• Blade length: Measure diagonally from cutting tip to cutting tip.
• Blade width and thickness: These dimensions affect fit, durability and cutting performance.
• Center-hole pattern: Identify whether the blade uses a round hole, five-point star, six-point star, bow-tie or multiple-hole mounting pattern.
• Number of blades: Count how many blades are installed on the deck.
• Rotation direction: Some decks use left-hand blades that rotate in the opposite direction.

Important: A blade that looks similar may not fit correctly. Always compare the OEM number, complete mower model, blade dimensions and mounting pattern before ordering.

Types of Lawn Mower Blades

Standard-Lift Blades

Standard-lift blades provide balanced airflow and cutting performance for routine mowing in normal grass conditions. They are a versatile choice for many side-discharge mower decks.

High-Lift Blades

High-lift blades create stronger airflow to raise grass before cutting and move clippings efficiently through the discharge chute. They are often used for bagging and clean side discharge but can require more engine power and may create additional dust in dry conditions.

Low-Lift Blades

Low-lift blades produce less airflow and are commonly used in sandy, dusty or dry conditions. Reduced lift can help limit airborne debris and may lower the power demand on the mower.

Mulching Blades

Mulching blades use curved surfaces and additional cutting edges to recirculate clippings inside the deck. The clippings are cut into smaller pieces before being returned to the lawn. Proper deck configuration and operating conditions are important for effective mulching.

Notched High-Lift Blades

Notched or toothed lift sections increase airflow and discharge performance. These blades can be useful in thick grass or demanding mowing conditions when the mower manufacturer specifies the design.

Commercial Mower Blades

Commercial replacement blades are built for frequent use and demanding mowing conditions. Confirm blade thickness, center-hole pattern and application because commercial decks often use equipment-specific designs.

Left-Hand Blades

Left-hand blades rotate in the opposite direction from standard right-hand blades. They must be installed on the correct spindle position and cannot be substituted with a standard-rotation blade.

How to Measure a Lawn Mower Blade

Measure blade length diagonally from one cutting tip to the opposite cutting tip. Do not measure straight across the center of a curved or offset blade. Also compare the blade width, thickness, center-hole size and the spacing of any outer mounting holes.

Common center-hole and mounting styles include:

• Round center holes
• Five-point star patterns
• Six-point star patterns
• Bow-tie mounting patterns
• Three-hole and six-hole mounting systems
• Offset and specialty mounting designs

When the old blade is badly worn, bent or damaged, rely on the OEM part number and equipment model rather than measurements alone.

Why the OEM Blade Number Matters

Two blades with similar lengths may still differ in center-hole design, thickness, offset, lift profile, cutting-edge location or rotation direction. Matching the original blade number helps prevent vibration, poor cut quality, spindle damage and unsafe operation.

If the blade number is readable, compare it with the replacement listing. Also verify the mower model because a previous owner may have installed the wrong blade.

Lawn Mower Blade Buying Tips

• Match the complete OEM number, including letters and suffixes.
• Confirm the mower model and deck size.
• Measure blade length diagonally from tip to tip.
• Inspect the center-hole and mounting pattern carefully.
• Replace severely worn, bent, cracked or damaged blades.
• Replace blades as a matched set when required by the deck.
• Inspect spindles, blade bolts, washers and adapters before installation.
• Balance sharpened blades before reinstalling them.
• Follow the mower manufacturer’s torque specifications and installation instructions.

Frequently Asked Questions

How do I find the correct mower blade?

Use the OEM blade number and complete mower model whenever possible. Then confirm the deck size, blade length, center-hole pattern, blade type and rotation direction.

Can I order using the number stamped on my old blade?

Yes. The stamped number is usually the best starting point, but verify it against the equipment model and application before ordering.

How is mower-blade length measured?

Measure diagonally from one cutting tip to the opposite cutting tip. Measuring straight across the center can produce an incorrect length.

What is the difference between high-lift and mulching blades?

High-lift blades create stronger airflow for discharge and bagging. Mulching blades recirculate clippings inside the deck so they can be cut into smaller pieces.

Can I install mulching blades on any mower?

Not always. The blade must fit the spindle and deck correctly, and the mower should be configured for mulching. Some decks require a mulch plug, baffles or a specific blade design.

Does deck size determine the correct blade?

No. Deck size is only one factor. Mowers with the same deck width can use different blade lengths, mounting patterns and quantities.

What does a five-point or six-point star mean?

It describes the blade’s center mounting pattern. The star pattern must match the mower’s spindle or blade adapter exactly.

How do I know whether I need a left-hand blade?

Check the OEM part number, blade orientation and parts diagram. Left-hand blades rotate opposite standard blades and are normally used only in specific deck positions.

Should mower blades be replaced as a set?

For multi-blade decks, replacing blades as a matched set can help maintain consistent cutting height, balance and airflow, especially when the existing blades have different levels of wear.

Why does a new blade vibrate?

Possible causes include an incorrect blade, improper installation, an unbalanced blade, a bent spindle, damaged adapter, loose hardware or debris trapped between mounting surfaces.

Can I sharpen a mower blade?

Many steel mower blades can be sharpened if they are not cracked, severely worn, bent or damaged. Maintain the original cutting angle and balance the blade before installation.

How often should mower blades be replaced?

Replacement frequency depends on mowing conditions, operating hours and blade condition. Replace blades when they are bent, cracked, excessively thin, deeply nicked or unable to hold a safe cutting edge.

Browse our OEM-style replacement belts and complete lawn mower belt collection for related mower maintenance parts.

For safe service, shut off the engine, remove the key, disconnect the spark-plug wire when appropriate, block the blade from moving and follow the equipment manufacturer’s maintenance instructions.