Greenworks 21-Inch Lawn Mower Blade Comparison: OEM Part Fit & Spec Breakdown

Best for: Boron steel durability and dynamic balancing

Pros

• 40MnB boron steel construction
• Full-body heat treatment
• Digital dynamic balancing

Cons

• Listing omits exact blade thickness

The 21 inch Lawn Mower Blade Compatible from Fismiuta is engineered as an industrial-grade replacement for 21-inch cordless decks. Its core structural feature is an industrial-grade 40MnB boron steel construction subjected to full-body heat treatment, which the listing notes provides 35 percent higher impact resistance against rocks and hidden debris. Gardeners seeking a dependable green works lawn mower component benefit from its digital dynamic balancing, which eliminates high-speed rotational wobbles to shield the motor bearings from long-term wear.

From an aerodynamic perspective, this mulching blade features high-lift suction contours that generate a vacuum vortex inside the deck chamber. This upward draft pulls turf blades upright for an even, single-pass cut across mulching, side discharge, and bagging modes. The expanded cutting edge ensures consistent sharpness to prevent grass browning. Additionally, the exterior receives a heavy-duty powder coating that offers 50 percent superior protection against rust and abrasive wear. Package dimensions measure 22.1 by 2.8 by 1.8 inches, and the product weighs 1.4 pounds.

In terms of deck cross-referencing, this model serves as a direct replacement for the greenworks 333041179 blade, as well as OEM part numbers 2905203, 311151519, 333041179B, 2915502, 2930002, 2903402, RB333041179, RB333041179V, 2992102, and R0200742-00. It fits machines using the greenworks MO40L03 blade, the greenworks MO48L4422 replacement blade, and the greenworks MO40L4413 mower blade across 40V G-MAX, 60V, 80V PRO, and 48V (2x24V) series. It yields to thicker carbon steel options when extreme physical mass is prioritized over boron agility.

• Constructed from heat-treated 40MnB boron steel for 35 percent greater impact resistance
• Digitally balanced to eliminate high-speed vibration and protect motor components
• High-lift mulching profile pulls grass upright for clean collection and discharge
• Coated in heavy-duty powder finish providing 50 percent enhanced rust resistance

Best for: Large properties with multi-voltage cordless fleets

Pros

• Thick carbon steel structure
• Anti-stick protective coating
• Extensive voltage cross-compatibility

Cons

• Heavy package weight

The MO48L4422 Lawn Mower Blade Compatible by Sthovd is fabricated from a thick carbon steel structure built for heavy-duty cutting operations. This carbon steel formulation resists bending and mechanical deformation when encountering tough yard debris. To safeguard the cutting surface, the manufacturer applies a rust-proof coating and anti-stick material designed to shed moist clippings, with the option to grind the surface in advance to maintain peak sharpness. The factory edges deliver a clean, smooth cut across home lawns, landscape greening projects, and rough straw cleanup.

Engineered with an optimized high-lift structure, this cutter minimizes aerodynamic drag to help preserve battery runtime while boosting clipping ejection velocity into grass catchers. For operators maintaining a greenworks 40v mower alongside larger yard machines, it delivers wide application versatility. The listing states product dimensions of 1 by 1 by 1 inches and an item weight of 9.98 pounds under model number MO48L4422, numbers reflecting packaging specifications rather than naked steel strip dimensions.

Compatibility is extensive across Greenworks cordless platforms. It replaces OEM numbers 333041179, 2905203, 311151519, 333041179B, 2915502, 2930002, and 29034. It matches greenworks 21 inch mower blade 40v applications including 2515502, 2527302AZ, 1306402AZ, 2525202, 1348402-HB, 2525102AZ, 2506502AZ, 2506602, and 2513502, as well as 40V G-MAX models MO40L4413, MO40L02, MO40L01, MO40L03, MO40L2512, LMF413, LMF414, LMF415, and M-210. It also functions as a greenworks 80v 21 inch mower blade across models 2550702, 2501202, 2500402, 2550402, 1356602, 1356702, 1356402, 1356502, 2533902, 2541302, 2533402, 2533602, 2502202, 2506902, 2515902, 2534102, and 2502402N, in addition to 60V (MO60L00, MO60L06, MO60L01, MO60L424, MO60L516, 60LM21P) and 2x24V units (2533202, 2532502, 2532702, 2532902). It gives way to dedicated corded blades on AC-powered mowers.

• Thick carbon steel structure resists deformation and structural bending
• High-lift blade design accelerates grass ejection while lowering motor power draw
• Protective anti-stick surface finish guards against moisture and corrosion
• Comprehensive fitment covering Greenworks 40V, 60V, 80V, and 2x24V series

Best for: Weekly lawn mulching with hardened steel

Pros

• Hardened steel durability
• Factory 20.08-inch length
• Corrosion-resistant protective coating

Cons

• Listing omits gauge thickness

The MO40L03 MO40L4413 Replacement Mower Blades from Eyoloty delivers an exact OEM-spec fitment for 21-inch cordless walk-behind and self-propelled mowers. Forged from high-grade hardened steel, this mulching cutter incorporates a corrosion-resistant coating that prevents degradation caused by grass juices and wet ground moisture. The physical dimensions measure 20.08 inches in length and 1.97 inches in width, aligning with factory deck tolerances to ensure adequate tip clearance without contacting the inner deck shroud.

This unit is specifically tailored for owners seeking a direct greenworks C3208101 replacement blade. The aerodynamic shape optimizes mulching efficiency by cycling cut blades through the cutting zone multiple times before depositing fine clippings back into the turf. The listing specifies an item weight of 3.87 pounds and package dimensions of 0.1 by 0.1 by 0.1 inches under model number MO40L03 Mulching Blades, while the listing does not specify the exact metal thickness.

Fitment covers an expansive range of cordless models. Beyond direct fitment for MO40L03, MO40L4413, and MO48L4422, it supports 40V models 2515502, 1306402AZ, 2527302AZ, 2525202, 2516402, 1348402-HB, 2525102AZ, 2506502AZ, 2508502, 2506602, and 2513502. On higher-voltage platforms, it fits 60V machines (2531702, 2531602, 2545102, 2531702T, 2531602T, 2535102T, 2504902T, 2509802), 80V mowers (2550702, 2550402, 2501202, 2500402, 1356602, 1356702, 1356402, 1356502, 2533902, 2541302, 2533402, 2533602, 2502202, 2506902, 2515902, 2534102, 2502402NV, 2533302, 2541202), and 2x24V models (2533202, 2532702, 2532502, 2532902). It gives way to SWAPARTS when precise factory thickness measurements are needed before ordering.

• High-grade hardened steel build ensures long-term edge retention
• Standardized 20.08-inch length and 1.97-inch width match cordless deck baffles
• Direct cross-reference for OEM part number C3208101
• All-weather corrosion-resistant coating guards against wet clippings

The Lawn Mower Blade for Greenworks 21 by SWAPARTS is a one-piece steel replacement blade providing fully documented physical dimensions for exact compatibility verification. SWAPARTS explicitly lists the blade at 20.08 inches in length, 1.97 inches in width, and 0.67 inches in thickness. This one-piece solid steel structure ensures that the blade remains sturdy under heavy mowing loads, resisting wear and deformation while maintaining clean cutting efficiency to keep turf healthy and manicured.

Engineered as a direct replacement for part C3208101, this cutter fits cordless walk-behind models MO40L4413, MO40L03, and MO48L4422. The package includes one replacement blade, with package dimensions listed at 20.47 by 2.36 by 1.41 inches and an item weight of 1.46 pounds under model number 01.A2.PW10009. The manufacturer highlights comparing your existing blade against the listing pictures to confirm mounting hole alignment before securing the center bolt. It gives way to corded-specific blades when working with 120V electric mowers.

• Sturdy one-piece steel construction minimizes wear and structural fatigue
• Precise dimensions of 20.08 inches in length, 1.97 inches in width, and 0.67 inches in thickness
• Direct replacement fit for Greenworks OEM part C3208101
• Includes one replacement blade engineered for MO40L4413, MO40L03, and MO48L4422

The Lawn Mower Blade 33313250 for Greenworks from SWAPARTS is engineered exclusively for corded electric walk-behind mowers. Specifically built to fit Greenworks 20-inch and 21-inch corded models 25022 and 25112 (referenced as 251122 in listing details), this blade replaces OEM part number 33313250. The listing instructs users to double-check their original blade number and interface diagram before ordering, as corded motor hubs utilize a mounting interface that differs from cordless battery decks.

Fabricated from one-piece steel, this blade features exact specifications of 19.69 inches in length, 1.97 inches in width, and 0.71 inches in thickness. The 19.69-inch length provides the exact physical clearance needed within corded deck housings, while the robust 0.71-inch thickness prevents blade flex during heavy grass cutting. Packaging dimensions are 20.47 by 2.36 by 1.41 inches with an item weight of 1.35 pounds under model number 01.A2.PW10008. This blade gives way to cordless options when maintaining battery-powered machines.

• Dedicated compatibility for Greenworks corded mower models 25022 and 25112 (251122)
• One-piece steel construction provides long-lasting durability and sharp cutting efficiency
• Specified dimensions of 19.69 inches in length, 1.97 inches in width, and 0.71 inches in thickness
• Direct OEM replacement for part number 33313250