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Finding the correct replacement cutting component for a compact electric deck requires paying close attention to hub dimensions, rotational balance, and metal composition. Operators using 16-inch walk-behind electric mowers frequently experience declining cut quality, reduced runtime per battery charge, and ragged grass tips after a single intensive cutting season. Swapping out a dull or warped factory component restores clean shearing action and prevents unnecessary strain on compact electric motors. Deciding between available aftermarket and factory-equivalent options comes down to identifying your exact deck configuration, understanding how specific alloys handle unexpected lawn debris, and balancing aerodynamic suction against battery draw. If you maintain multiple machines across different footprints, you might also compare how these compact rotary decks perform alongside larger platforms like a greenworks 40v 21 inch self-propelled cordless lawn mower.
The catalog of blades serving 16-inch decks centers around core part numbers 33303488 and 29512, which correspond directly to widely used platforms including corded decks and the 40V G-MAX cordless series. Within this category, options range from high-lift boron steel configurations treated for maximum rock resistance to straightforward stamped steel replacements and dimensionally explicit metric profiles designed for lithium-ion walk-behinds. Each model approaches cut quality and durability through distinct manufacturing methods, ranging from dynamic factory balancing and specialized protective coatings to streamlined single-piece steel stampings. Choosing the right unit requires analyzing how center bore dimensions, blade thickness, and aerodynamic lift geometry integrate with your specific mower chassis and daily yard care routine.
This guide by the numbers
9.4/10
Best rated model
Our highest score in this line-up
3
Models on file
Models in this guide that have a stored product record
3
Brands involved
Distinct brand names on the product records used here
Prices and specifications come from the stored Amazon listing data for the products in this article. Scores are out of 10, based on listed specifications and buyer feedback.
Greenworks Lawn Mower Blades Lineup at a Glance
Lawn Mower Blade for Greenworks 16
Best for: Everyday clean trimming
Pros
- One-piece steel
- Specified thickness
- Direct OEM fit
Cons
- Basic finish coating
- No bore spec
| Model Name | OEM Replacement Reference | Key Structural Specifications | Intended Deck Compatibility |
|---|---|---|---|
| 25322 | 33303488, 29512 | 40MnB Boron Steel, Heat Treated, High-Lift Vortex Design, Powder Coated | Greenworks 16-Inch Corded, 40V G-MAX Series (25322, 25242) |
| Lawn Mower Blade for Greenworks 16 | 33303488 | One-Piece Solid Steel, 15.75-Inch Length, 1.97-Inch Width, 0.71-Inch Thickness | Greenworks 16-Inch Models (25322, 25242) |
| ISE 16″ Blade for Greenworks 16 | 33303488, SUN-33303488, GBL137629, 137629 SR, 29512, HU469 | Standard Steel, 391mm Length, 22.1mm Center Bore Diameter | Greenworks 16-Inch 40V Lithium-Ion Mowers |
The Models in Detail
01
25322
25322
Best for: Heavy yard debris and mulching
Pros
- Boron steel build
- Dynamic balancing
- High-lift suction airflow
Cons
- Higher aerodynamic drag
- Check deck clearance
Built for demanding cutting conditions and challenging turf layouts, the 25322 replacement component focuses heavily on alloy resilience and aerodynamic airflow. The manufacturer constructs this unit using industrial-grade 40MnB boron steel subjected to a comprehensive full-body heat treatment process. This metallurgy yields thirty-five percent higher impact resistance compared to standard brittle replacement metal, preventing fractures or severe warping when clipping hidden obstacles, surface roots, or stray gravel. In addition to high-tensile base steel, the exterior receives a heavy-duty powder coating designed to provide a fifty percent superior barrier against rust and moisture abrasion. For hobbyists managing turf where hidden garden edges or mixed grasses routinely dull standard cutting profiles, this reinforced metallurgical build offers substantial resistance against rapid edge degradation.
Beyond material toughness, this unit integrates an aggressive high-lift aerodynamic contour intended to create a vacuum vortex inside the 16-inch cutting chamber. This continuous upward airflow pulls grass blades upright prior to contact, enabling clean, single-pass shearing rather than tearing tips. The listing notes that this high-lift geometry operates across mulching, rear bagging, and side discharge setups, helping direct packed clippings toward collection containers to reach one hundred percent bagging capacity. Furthermore, each unit undergoes digital dynamic balancing during production to mitigate rotational wobbles at high motor revolutions. By eliminating balance-induced chatter, the assembly shields the drive motor bearings from excessive mechanical wear, making this an ideal 16 inch mulching blade greenworks choice for operators who demand clean collection and smooth deck operation. It gives way to simpler stamped blades when users seek minimal rotational drag to conserve run time on older battery packs.
02
Lawn Mower Blade for Greenworks 16
The Lawn Mower Blade for Greenworks 16 presents a direct, utilitarian design centered on sturdy one-piece steel construction. Listed under OEM reference 33303488, this cutting unit directly targets the popular 25322 and 25242 lawn mower blade applications. Dimensional specifications outlined in the product listing indicate an overall length of 15.75 inches, a width spanning 1.97 inches, and a stated thickness of 0.71 inches. By utilizing a continuous single-piece steel profile, the structure resists standard operational wear and tear while slicing cleanly through standard residential turfgrasses. Operators seeking a straightforward replacement without overly aggressive aerodynamic lift fins will appreciate the predictable profile of this unit, which delivers steady efficiency while keeping grass cleanly clipped and level.
This model is built primarily for homeowners performing weekly maintenance on manicured, obstacle-free suburban lawns where extreme impact resistance is not a daily necessity. The streamlined profile reduces air resistance beneath the deck compared to high-lift options, allowing the electric motor to sustain consistent cutting RPM without bogging down in light-to-medium grass growth. While it delivers straightforward mowing performance, the listing explicitly urges buyers to compare their existing factory component visually against the listing images to verify physical fitment before mounting. This blade provides reliable everyday utility, but users requiring verified metric bore measurements or extensive cross-reference compatibility across commercial-style part numbers will find a more explicit hardware specification in the ISE replacement line.
03
ISE 16″ Blade for Greenworks 16
ISE 16″ Blade for Greenworks 16
Best for: Broad 40V model cross-compatibility
Pros
- Clear 22.1mm bore spec
- Broad OEM cross references
- Exact 391mm length
Cons
- Basic aerodynamic lift
- No balance rating stated
The ISE 16″ Blade for Greenworks 16 stands out for its comprehensive specification transparency and extensive cross-reference catalog. Tailored specifically for 40V lithium-ion walk-behind machines, this component lists an exact metric length of 391 millimeters (matching the functional 16-inch deck reach) paired with an exact middle bore diameter of 22.1 millimeters. Providing exact center mounting dimensions removes the guesswork often associated with electric mower maintenance, ensuring the center hole seats securely over the motor arbor without unwanted slop. For users maintaining older cordless decks or seeking a precise greenworks 33303488 replacement blade, these clear engineering tolerances streamline the installation workflow and eliminate fitment doubts.
Cross-referencing capability is a major asset for this unit, as the listing confirms compatibility across OEM part numbers 33303488, SUN-33303488, GBL137629, 137629 SR, 29512, and HU469. This broad interchange index makes the ISE 16 blade for greenworks 16 an exceptional solution for maintenance technicians, tool enthusiasts, and hobbyists who operate varying generational releases of the Greenworks 40V cordless family. Its profile is engineered to support balanced rotary velocity on lithium-ion power plants, preserving runtime while providing a dependable clean cut. While it provides exact bore confirmation, users facing rocky terrain or requiring specialized impact-resistant boron steel heat treatments will lean toward heavy-duty high-lift alternatives.
Matching a Model to Your Setup
- Rough Grounds and Hidden Yard Obstacles: Select the 25322 if your mowing area includes exposed tree roots, gravel edges, or uneven ground where standard steel is prone to chipping, because its heat-treated 40MnB boron steel construction provides thirty-five percent higher impact resistance.
- Standard Clean Mulching and Bagging Workflows: Choose the 25322 if you want to maximize collection capacity and grass tip health, as its aerodynamic high-lift vortex design pulls turf upright and packs rear collection bags to full volume.
- Routine Maintenance on Flat Suburban Yards: Choose the Lawn Mower Blade for Greenworks 16 when you need a simple, single-piece steel direct swap for weekly yard upkeep on flat residential grass without extra aerodynamic motor drag.
- Verified Bore Alignment on 40V Cordless Decks: Install the ISE 16″ Blade for Greenworks 16 if your primary concern is verified arbor fitment, thanks to its explicitly detailed 22.1-millimeter middle bore specification and precise 391-millimeter length.
- Sourcing Hard-to-Find Cross-Reference Codes: Pick the ISE 16″ Blade for Greenworks 16 if your equipment documentation references alternate part numbers such as SUN-33303488, GBL137629, or HU469, ensuring exact OEM operational parity.
Before You Buy
Before ordering any replacement cutting edge, verify that your mower matches the specific 16-inch chassis designation. Compact electric mowers utilize tightly calibrated deck housings, meaning that slight variances in overall blade reach can cause structural rubbing against the inner deck wall or leave uncut strips along wheel paths. The listings for these replacement components do not include replacement motor shaft hardware, such as center mounting bolts, dished spring washers, or motor spacer keys. You must inspect your current deck assembly to confirm that your existing hardware remains unstripped, free of severe rust, and structurally capable of securing the new blade to factory torque specifications.
Additionally, pay close attention to center bore designs and thickness metrics across the available listings. While some listings provide exact internal bore measurements in millimeters, others focus solely on external length and width or require visual verification against your existing factory blade. Installing an incorrectly seated blade can cause severe vibration that damages the motor shaft bearings over time. If your property encompasses sprawling acreage that pushes beyond the capacity of compact 16-inch decks, exploring larger equipment such as a greenworks 80v mower provides insight into commercial-grade cutting widths, while those interested in manual reel mechanics can review an earthwise 16 inch reel mower for contrast.
FAQ
Which greenworks lawn mower blade to buy for heavy mulching?
For intensive mulching and rear bagging tasks, the 25322 model is the most capable option due to its aerodynamic high-lift design. The contoured ends generate an internal vacuum vortex that lifts damp or flattened turf before cutting, producing fine clippings that decompose rapidly or flow smoothly into collection bags.
Will a greenworks 29512 blade fit both corded and cordless 16-inch models?
Yes, listing data indicates that components matching OEM reference numbers 29512 and 33303488 cross-operate across both 16-inch corded mowers and 40V G-MAX cordless machines, including the widely used 25322 and 25242 chassis. Always inspect your existing motor hub to confirm alignment prior to installation.
What causes severe deck vibration after installing a replacement blade?
Excessive noise and deck shaking typically indicate an improperly seated center bore, a missing retaining washer, or an unbalanced blade. Blades featuring digital dynamic balancing eliminate inherent rotational wobbles, but securing the blade flat against the motor arbor remains essential for vibration-free mowing.
How do I confirm compatibility if my mower manual lists alternate part numbers?
Check the multi-part cross references provided on listings like the ISE 16″ Blade for Greenworks 16, which explicitly replaces 33303488, SUN-33303488, GBL137629, 137629 SR, 29512, and HU469. Matching one of these manufacturing references guarantees proper rotational clearance inside the 16-inch housing.
Do these replacement blades come with new center mounting bolts?
The listings indicate that the packages include only the replacement cutting blade itself. Center retaining bolts, lock washers, and arbor friction plates are not included and must be reused from your mower’s existing assembly or purchased separately if damaged.
