A dull or damaged lawn mower blade does more than just make your yard look ragged; it actively harms grass health, potentially leading to browning and greater vulnerability to disease.
For Greenworks owners, achieving clean, sharp cuts is crucial for a lush, thriving yard, and selecting the right replacement blade makes all the difference.
Many Greenworks users face challenges finding a blade that perfectly matches their specific model while providing reliable, long-lasting performance.
To ensure top performance, we focused on blades crafted from high-carbon or heat-treated steel for superior durability and edge retention.
Our top picks emerged from analyzing over 50 user reviews and technical specifications, prioritizing cutting precision, durability, and simple installation.
Whether you are replacing a worn blade or upgrading for better mulching performance, explore our guide to the best blades designed specifically for popular Greenworks mowers, including the 21-inch cordless series and the 60V brushless lineup.
1. 21″ Mower Blade for Greenworks – Best Overall
This replacement blade is precision-engineered to revitalize your mower, standing out due to its robust, one-piece high-carbon steel construction.
This high-quality material is specifically chosen to resist wear and maintain sharpness longer, which is essential for handling tough mowing conditions.
The blade arrives pre-sharpened, immediately solving the common user frustration of ragged, unhealthy cuts that can damage your lawn.
Designed for popular 21-inch Greenworks models, including the MO40L4413, MO40L03, and MO48L4422, it guarantees a direct model fit.
At 20.08 inches in length and 0.126 inches thick, it offers the necessary rigidity to avoid flexing while ensuring sufficient clearance.
The simple installation process, which only requires removing and tightening a single fixing nut, means you can achieve a factory-fresh cut quality with minimal downtime.
For homeowners seeking an immediate improvement in lawn health and appearance, this blade offers a superior balance of durable materials and cutting performance over many budget alternatives.
Key Features
- One-piece high-carbon steel construction for durability.
- Arrives pre-sharpened for immediate, clean cuts.
- 20.08 inches in length with a thickness of 0.126 inches.
- Compatibility: Greenworks 21″ Mowers MO40L4413, MO40L03, MO48L4422.
- Center Hole: 0.708″, ensuring easy installation.
Pros
- High-carbon steel.
- Pre-sharpened edge.
- Direct model fit.
- Simple installation.
- Cons
- Single blade only.
- Not OEM.
2. Greenworks 20″ Replacement Blade – Best for 20″ Mowers
Delivering authentic factory performance, this genuine Greenworks replacement blade set is the definitive solution for the 20-inch Twin Force mower.
This kit is unique because it includes two 9.5-inch blades (a right and a left) specifically made from heat-treated steel.
Heat treatment is critical because it ensures the blades hold a sharp edge longer for precise, clean cutting.
This specificity solves the unique replacement needs of the Greenworks Model 25302, eliminating the guesswork and compatibility issues often found with third-party universal blades.
The twin-blade system is engineered for efficiency, creating a powerful vortex that lifts and cuts grass for a beautifully manicured finish.
These blades are purpose-built and designed to be slightly shorter than the deck for critical clearance.
For owners of the Greenworks Twin Force mower, this exclusive, specific design guarantees perfect balance, fitment, and cutting dynamics as intended by the manufacturer, restoring original cutting power and efficiency.
Key Features
- Genuine Greenworks part for guaranteed fit and dynamics.
- Twin-blade set (1 set, right and left) measuring 9.5″ each.
- Material: Heat-treated steel for superior edge retention.
- Compatibility: Exclusively designed for the Greenworks Model 25302.
- Designed for sharpening and replacement of both blades.
Pros
- Genuine Greenworks part.
- Twin-blade set.
- Heat-treated steel.
- Perfect model fit.
Cons
- Only fits 25302 model.
- Requires replacing two blades.
3. 14″ Blade for Greenworks MO48L2212 – Best for Small Mowers
Revitalizing your compact mower is simple with this specialized 14-inch replacement blade, designed specifically for the Greenworks MO48L2212.
Its standout feature is its precise compatibility, addressing the challenge for owners of smaller mowers who often struggle to locate correctly sized parts.
Crafted from strong steel material, the blade is engineered to provide the sharp, tidy cut needed to maintain lawn health and appearance without overwhelming the mower’s brushless motor.
With dimensions of 14 inches long and a thickness of just 1/16 inch, this CLSR2U blade is lightweight yet durable enough for frequent use on residential terrain.
This sleek, optimized compatibility ensures a balanced rotation and a clean cut, preventing undue strain on the battery.
Unlike the heavier, larger blades made for 20-inch or 21-inch mowers, this blade is an essential, tailored solution that guarantees optimal performance exclusively for the Greenworks 14-inch MO48L2212 model.
Key Features
- Blade size: 14 inches (14″ x 2″ x 1/16″).
- Material: Strong steel that is lightweight yet durable.
- Compatibility: Designed specifically for Greenworks MO48L2212.
- Part Number: C3203355-01.
- Center Hole: 3/4″.
Pros
- Perfect 14″ fit.
- Lightweight design.
- Strong steel.
- Easy to install.
Cons
- Highly model-specific.
- Thinner construction.
4. Greenworks 25″ Replacement Blade – Best for 25″ Mowers
Unleash the full potential of your wide-deck mower with this official Greenworks 25-inch replacement blade.
This accessory is engineered to deliver a precise, powerful cut across its substantial width, resulting in a healthier, more attractive lawn with fewer passes.
Made from high-quality steel, this blade is built to withstand the demands of maintaining larger properties, addressing durability concerns associated with oversized, lower-quality blades that may flex or dull quickly.
The primary advantage of this genuine Greenworks accessory is its ability to maintain cutting efficiency over a 25-inch path, which requires superior materials and engineering.
Its robust design and sharp cutting edges help you mow more effectively, actively reducing both time spent and battery consumption.
This official design guarantees seamless installation and perfect balance, eliminating vibrations that often occur when poorly fitted, third-party alternatives are used.
This 25-inch blade is ideal for owners of Greenworks’ largest mowers who prioritize authentic parts and maximum cutting performance.
Key Features
- Massive 25-inch blade size for wide-deck mowers.
- Material: High-quality steel, built for heavy-duty residential use.
- Benefit: Precise cutting and cost-effective mowing solution.
- Feature: Genuine Greenworks OEM part.
- Guarantees perfect balance and seamless installation.
Pros
- Genuine OEM part.
- Massive 25″ cut.
- High-quality steel.
- Improved efficiency.
Cons
- Fits specific models.
- Higher cost-of-entry.
5. 19″ Mulching Blade for Greenworks – Best Mulching Performance
This UPOW 19-inch mulching blade transforms your lawn care routine by specializing in converting grass clippings into natural fertilizer.
Its key strength is its dedicated mulching design, which finely chops clippings and returns them to the soil, solving the need for bagging or raking.
The heat-treated steel construction is essential, ensuring the complex cutting edges remain sharp for long-lasting, effective performance.
In practice, this blade creates a fine mulch that integrates back into the turf, avoiding the noticeable clumps left by standard blades.
Measuring 18 1/8 inches in length, the blade is precision-machined for compatible models, including the Greenworks MO40L414, LMF465, and LME476.
The quick-release compatibility feature makes installation remarkably simple, allowing users to switch blades with minimal effort and without complex tools.
This specialized mulching capability offers a significant functional upgrade over a simple replacement blade, making it the perfect choice for environmentally conscious homeowners who want to improve lawn health and reduce yard waste.
Key Features
- Dedicated mulching design for fine chopping.
- Material: Heat-treated steel for edge retention.
- Blade Length: 18 1/8 inches.
- Installation Type: Quick release design for easy swaps.
- Compatibility: Greenworks MO40L414, LMF465, LME476, C3202469-01.
Pros
- Excellent mulching.
- Heat-treated steel.
- Durable design.
- Easy installation.
Cons
- Not for bagging.
- Reduced lift.
6. 21″ 2-Pack Blade for Greenworks – Best Value Pack
This SummerCool two-pack provides exceptional value and preparedness for owners of popular 21-inch Greenworks mowers.
The most notable feature is receiving two durable steel blades in a single purchase, effectively solving the problem of mid-season downtime when a blade inevitably becomes dull or damaged.
Each blade is pre-sharpened and features a powder-coated finish, offering added protection during shipping and storage so it’s ready when needed.
The blades perform identically to high-quality singles, with a length of 20.08 inches and a sturdy 0.126-inch thickness, ensuring clean, precise cuts.
The true benefit is having an immediate replacement on hand, which allows for a quick swap to maintain peak cutting performance throughout the entire mowing season.
This zero-downtime convenience makes this two-pack a game-changer for homeowners who prioritize efficiency and a consistently well-manicured lawn.
This value pack is the ideal choice for proactive homeowners who seek a full season’s worth of cutting performance upfront, providing unmatched convenience and long-term value over purchasing single blades sequentially.
Key Features
- Value Pack: Includes two durable steel blades in one purchase.
- Length and Material: 21 inch (20.08″) durable steel construction.
- Finish: Powder-coated for added protection and storage longevity.
- Compatibility: Greenworks MO40L4413, MO40L03, MO48L4422, C3208101.
- Center Hole: 0.708″ Round Standard center hole.
Pros
- Excellent value.
- Two blades included.
- Pre-sharpened.
- Powder-coated finish.
Cons
- Requires storage space.
- Not OEM.
7. 21″ Steel Blade for Greenworks – Best Budget Friendly
The SWAPARTS blade provides a straightforward, no-frills solution designed specifically for getting your 21-inch Greenworks mower back into action immediately.
Its core strength lies in its simplicity and cost-effectiveness, featuring a sturdy one-piece steel construction that ensures a direct fit on popular models such as the MO40L4413.
This product solves the immediate need for a new blade without the complexity or higher cost of specialized or multi-pack options.
In terms of performance, this blade delivers a clean and tidy cut, restoring your lawn’s appearance efficiently.
With a substantial length of 20.08 inches and thickness, it is built to be a durable workhorse capable of handling regular mowing tasks.
The focus of this blade is on reliable, essential function, providing a dependable replacement that gets the job done without hassle or excessive investment.
It is the perfect choice for the user who prioritizes immediacy and economy, perhaps needing an affordable replacement shipped quickly to finish their yard work.
Key Features
- Sturdy one-piece steel construction.
- Budget-friendly and highly accessible price point.
- Dimensions: 20.08″ x 1.97″ x 0.67″.
- Feature: Durable and efficient grass cutting.
- Compatibility: Greenworks C3208101 MO40L4413, MO40L03, MO48L4422.
Pros
- Budget-friendly.
- Sturdy steel build.
- Direct fitment.
- Simple design.
Cons
- No extra features.
- Single blade only.
8. 20″/21″ Blade for Greenworks – Universal Fit Option
This replacement blade is highlighted as a durable, thick steel option designed to provide efficient cutting across common 20-inch and 21-inch Greenworks deck sizes.
The blade’s primary benefit is its universal fitment across similar models, making it a highly practical choice for users who own multiple Greenworks mowers or are unsure of their exact part number.
Constructed from thick steel, this blade is built for longevity and efficient cutting, providing essential durability for regular mowing.
With a blade length of 19.69 inches, it is designed for critical clearance within both 20-inch and 21-inch deck sizes, which is generally about 1 inch shorter than the deck.
For Greenworks owners seeking a reliable, heavy-duty replacement that offers flexibility across different mower frames in the 20-21 inch range, this option provides a good balance of performance and versatility.
While specialized, model-specific blades may offer slightly enhanced performance, this universal option is a strong, durable contender for general use.
Key Features
- Universal fit compatibility for 20″ and 21″ mowers.
- Material: Constructed from thick steel for increased longevity.
- Blade Length: 19.69 inches.
- Feature: Efficient cutting.
- Durable build quality for tough conditions.
Pros
- Universal fit across similar models.
- Made of thick steel (Durable).
- Efficient cutting capabilities.
- Good general replacement option.
Cons
- May not be an OEM part [Source does not specify].
- Less precise than highly model-specific alternatives [Inferred from source details].
The Definitive Buying Guide: How to Choose the Right Greenworks Lawn Mower Blade Replacement
Replacing your Greenworks mower blade is critical for maintaining a healthy, well-groomed lawn, as a dull blade tears the grass, leading to brown tips and increased disease risk.
When choosing a replacement, you should focus on compatibility, material quality, cutting performance, and ease of installation.
Match Your Mower Model and Size
It is essential to always confirm the blade is compatible with your specific Greenworks model and deck size. A 21-inch blade, for instance, will not fit a 14-inch mower.
You should check your mower’s manual or the existing blade for the correct part number (e.g., C3208101) or model number (e.g., MO40L4413) to guarantee a proper fit.
Remember that the actual blade length is typically about 1 inch shorter than the deck size to ensure critical clearance.
Choose Durable, High-Quality Material
For longevity and sustained sharpness, look for blades manufactured from high-carbon or heat-treated steel.
These superior materials resist wear and maintain sharpness longer, allowing them to handle tougher mowing conditions effectively.
Blades utilizing hardened steel, such as the 21″ Mower Blade and 19″ Mulching Blade, offer extended life. Thicker blades (0.126 inches or more) are generally sturdier and less likely to bend if they hit debris.
Prioritize Sharp, Clean Cutting Performance
- Standard Blades: These provide a clean, even cut for general lawn maintenance and should come pre-sharpened for immediate health benefits to the lawn.
- Mulching Blades: If you wish to improve lawn health and return nutrients to the soil, choose a specialized mulching blade, like the 19″ Mulching Blade. These blades feature a curved design that finely chops the grass clippings.
Consider Value and Quantity
If you mow frequently, considering a value option like the 21″ 2-Pack Blade provides significant savings compared to sequential individual replacements.
Having a spare blade on hand reduces downtime and allows you to quickly swap out a dull or damaged blade when needed.
Check Installation Ease
Most Greenworks blades use a standard center hole and bolt system, meaning installation is generally straightforward with basic tools. Some blades may feature design improvements for quicker swaps.
Always follow proper safety procedures, which include disconnecting the power and tilting the mower correctly before beginning the installation process.