Best Mower Blades for Lawn Tractors (2026): 5 Picks by Fit
Five replacement blade pairs for 42 and 46 in lawn tractor decks: mulching and high-lift blades compared by fit, mount, steel and warranty, plus who should skip each one.
On this page
Top picks at a glance
As an Amazon Associate I earn from qualifying purchases.
- 1
Best OverallUDC Parts GY208509.6/10View on Amazon - 2
Best Value 42 inKOFINAM 942-04308-X9.5/10View on Amazon - 3
Best 46 in MulchingOregon 96-3709.5/10View on Amazon - 4
Best High-LiftFismiuta 4031079.5/10View on Amazon - 5
Best ToothedBDELI 942-043089.5/10View on Amazon - 6
Grasscool ZT1 54 High Lift Blades for Cub Cadet 54 inch MowerView on Amazon - 7
532138971 Mower Blades for Craftsman/HU/Pou LAN 42" LawnView on Amazon - 8
EGO POWER+ 21" Mulching Blades for Electric Lawn MowersView on Amazon - 9
3 Pack 532180054 Lawn Mower Blades with 532193003 BoltsView on Amazon - 10
Hipa 532405380 46 Inch Mower Blades Replace for 405380View on Amazon
A few acres of spring growth will show you what dull blades do: torn grass tips that brown out, clumps that smother the lawn, and a tractor working harder than it should. This guide to the best mower blades for lawn tractors compares five replacement blade pairs for 42 and 46 in decks, and says plainly which tractors each one fits.
AcreMowerLab earns a commission when you shop through links here. It never changes your price. Affiliate disclosure.
Quick picks
- Best Overall UDC Parts GY20850: A 7-point star mount for long lists of John Deere tractors, with 1-year product support. Check price on Amazon
- Best Value 42 in KOFINAM 942-04308-X: A 42 in mulching pair with 6 months of warranty service for Cub Cadet and MTD decks. Check price on Amazon
- Best 46 in Mulching Oregon 96-370: Oregon Gator G3 blades with a 26-point certification for 46 in decks. Check price on Amazon
- Best High-Lift Fismiuta 403107: Boron steel blades with digital dynamic balancing for 46 in decks. Check price on Amazon
- Best Toothed BDELI 942-04308: Toothed triple-function blades with a 1-1/8 in lift for 42 in decks. Check price on Amazon
Our acreage picks
UDC Parts GY20850 42 in Gator Mulching Blades, 2-Pack
Gator mulching blades for 42 in John Deere decks with a 7-point star mount and 1-year product support.
Who it's for: John Deere lawn tractor owners with a 42 in deck who want a direct-fit mulching blade.
Who should skip it: anyone with another brand, where the mount and deck will not match.
Read the full review
The UDC Parts GY20850 is the John Deere owner's blade: a 2-pack of gator mulching blades for 42 in decks, with a 21-3/8 in length, 2-3/4 in width, 1 in air lift and a 7-point star center hole. The listing names dozens of compatible tractors, from the D100 and D130 through the X300 and X500 series, and the cutting edge runs 5-7/16 in.
The listing warns that parts may vary even within the same mower model, and asks buyers to verify the complete model number, deck size and the 7-point star mounting pattern before ordering. It provides 1-year product support for manufacturing defects. The listing states an item weight of 4.51 pounds.
Pros
- Fits a long list of John Deere tractors, from D100 to X500 series decks
- Gator mulching design with 1 in air lift
- 7-point star mount matches the common John Deere spindle
- 1-year product support for manufacturing defects
Cons
- Only fits John Deere 42 in decks, no other brands listed
- Parts may vary even within the same mower model, so verify before ordering
- No blade thickness stated on the listing
- No safety certification stated
KOFINAM 942-04308-X 42 in Mulching Blades, 2-Pack
Mulching blades for 42 in Cub Cadet, MTD and Troy-Bilt decks with a 6-point star mount and 6 months of warranty service.
Who it's for: owners of Cub Cadet, MTD or Troy-Bilt 42 in decks who want a direct replacement with warranty service.
Who should skip it: anyone with a John Deere or Husqvarna spindle, which uses a different mount.
Read the full review
The KOFINAM 942-04308-X is the multi-brand 42 in blade: a 2-pack of mulching blades for Cub Cadet, MTD, Troy-Bilt, Craftsman, Huskee and Columbia decks, with a 21-1/4 in length, 2-3/8 in width, .138 in thickness and a 6-point star center hole. The compatibility list covers XT1 and XT2 tractors, RZT zero-turns and the LTX1040.
The listing states 6 months of warranty service and asks buyers to reach out by email with questions. It does not state an air lift figure or a safety certification.
Pros
- Fits Cub Cadet, MTD, Troy-Bilt and Craftsman 42 in decks
- 6 months of warranty service stated
- Blade thickness stated at .138 in
- Wide compatibility list across XT1, XT2, RZT and LTX models
Cons
- No air lift figure stated on the listing
- No safety certification stated
- Shorter warranty than the 1-year UDC support
- After-sales contact is by email only
Oregon 96-370 46 in Gator G3 Mulching Blades, 2-Pack
Oregon Gator G3 mulching blades for 46 in decks with a 5-point star mount and a 26-point manufacturing certification.
Who it's for: owners of 46 in decks across the major brands who want the Oregon Gator name.
Who should skip it: anyone with a 42 in deck, or anyone who wants a written warranty term.
Read the full review
The Oregon 96-370 is the name-brand 46 in blade: a 2-pack of Gator G3 mulching blades, 22-7/8 in long, 2.75 in wide and 0.187 in thick, with a 5-point star center hole and a 7/8 in lift. The listing claims a 26-point manufacturing certification for quality and durability, and the high-lift blade angle is meant to improve bagging and side discharge.
It fits a wide range of brands: Ariens, AYP, Dixon, Husqvarna, Poulan, Rotary, Snapper and Stens, with part numbers listed for each. The listing states no warranty term and no safety certification. The listing states an item weight of 2.68 pounds.
Pros
- Oregon Gator G3 mulching design with high-lift blade angle
- 26-point manufacturing certification stated
- 0.187 in thick, per the listing
- Fits Ariens, AYP, Dixon, Husqvarna, Poulan, Snapper and Stens
Cons
- No warranty term stated on the listing
- No safety certification stated
- 46 in decks only, not for 42 in tractors
- Designed and engineered in the USA but the listing does not state where it is made
Fismiuta 403107 46 in High-Lift Mulching Blades, 2-Pack
High-lift mulching blades for 46 in Husqvarna and Craftsman decks, forged from 40MnB boron steel with digital dynamic balancing.
Who it's for: owners of 46 in Husqvarna or Craftsman decks who mow rough ground with hidden rocks.
Who should skip it: anyone who wants full dimensions or a warranty term on the listing.
Read the full review
The Fismiuta 403107 is the materials-story blade for 46 in decks: forged from industrial-grade 40MnB boron steel with full-body heat treatment, which the maker says delivers 35% higher impact resistance than plain carbon steel blades. Each blade gets digital dynamic balancing to cut vibration, and a heavy-duty powder coating for rust resistance.
The high-lift aerodynamic design is meant to pull grass upright for a clean cut in mulching, bagging or side discharge. The listing replaces a long list of OEM part numbers for Husqvarna, Craftsman, AYP and Poulan 46 in decks. It states no blade length, no thickness, no warranty term and no safety certification.
Pros
- 40MnB boron steel with full-body heat treatment
- Digital dynamic balancing stated for each blade
- 35% higher impact resistance claimed by the maker
- Heavy-duty powder coating for rust resistance
Cons
- No blade length or thickness stated on the listing
- No warranty term stated
- Impact and rust claims are the maker's, with no independent backing stated
- No safety certification stated
BDELI 942-04308 42 in Toothed Mulching Blades, 2-Pack
Toothed triple-function mulching blades for 42 in Cub Cadet and Troy-Bilt decks with a 6-point star mount.
Who it's for: Cub Cadet and Troy-Bilt 42 in deck owners who want a toothed mulching blade with full published dimensions.
Who should skip it: anyone with an S-shape center spindle, or anyone who wants a warranty term.
Read the full review
The BDELI 942-04308 is the spec-sheet blade for 42 in decks: a 2-pack of toothed mulching blades with full dimensions in inches and millimeters, 21-1/4 in long, 2-3/8 in wide, 5/32 in thick, a 6-point star center hole and a 1-1/8 in lift. The toothed design is meant to shred grass finer for mulching, bagging and side discharge.
The listing warns it is not compatible with S-shape center models and asks buyers to verify the 6-point star pattern before purchase. The blades come pre-sharpened with anti-rust paint that wears off in use. No warranty term or safety certification is stated.
Pros
- Toothed triple-function design for mulching, bagging and side discharge
- Full dimensions stated in inches and millimeters
- 1-1/8 in lift for enhanced mulching and discharge
- Pre-sharpened edges with anti-rust paint
Cons
- No warranty term stated on the listing
- Not compatible with S-shape center models, per the listing note
- No safety certification stated
- Anti-rust paint wears off during use
Other machines to compare
Grasscool ZT1 54 High Lift Blades for Cub Cadet 54 inch MowerCheck price on Amazon
532138971 Mower Blades for Craftsman/HU/Pou LAN 42" LawnCheck price on Amazon
EGO POWER+ 21" Mulching Blades for Electric Lawn MowersCheck price on Amazon
3 Pack 532180054 Lawn Mower Blades with 532193003 BoltsCheck price on Amazon
Hipa 532405380 46 Inch Mower Blades Replace for 405380Check price on Amazon
Side-by-side specs
| Model | Acre Score | Deck | Blade length | Center hole | Blade type | Warranty |
|---|---|---|---|---|---|---|
| UDC Parts GY20850 | 9.6/10 | 42 in | 21-3/8 in | 7-point star | Gator mulching | 1-year product support |
| KOFINAM 942-04308-X | 9.5/10 | 42 in | 21-1/4 in | 6-point star | Mulching | 6 months |
| Oregon 96-370 | 9.5/10 | 46 in | 22-7/8 in | 5-point star | Gator G3 mulching | Not stated |
| Fismiuta 403107 | 9.5/10 | 46 in | Not stated | 5-star | High-lift mulching | Not stated |
| BDELI 942-04308 | 9.5/10 | 42 in | 21-1/4 in | 6-point star | Toothed mulching | Not stated |
Specifications are manufacturer rated as listed, collected 22 October 2026.
Acreage and terrain fit
UDC Parts GY20850
KOFINAM 942-04308-X
Oregon 96-370
Fismiuta 403107
BDELI 942-04308
What the listings tell you
We compared five blade listings for lawn tractors. All five are 2-packs of mulching blades for 42 or 46 in decks. Three state a blade length: 21-3/8 in, 21-1/4 in and 22-7/8 in. Four state the center hole shape: a 7-point star, a 5-point star and two 6-point stars. Two state a warranty term: 1-year product support and 6 months of warranty service. Three state a lift figure: 1 in, 7/8 in and 1-1/8 in. None states a safety certification.
Buying guide: best mower blades for lawn tractors
Match the center hole first
The center hole is the deal-breaker. The UDC uses a 7-point star for John Deere spindles, the Oregon a 5-point star, and the KOFINAM and BDELI a 6-point star for Cub Cadet and MTD spindles. The UDC listing warns that parts may vary even within the same mower model, and asks buyers to verify the model number, deck size and the mounting pattern before ordering. Do that check first, because the wrong mount will not fit no matter how good the blade is.
Blade length and deck size
Blade length follows the deck: the 42 in decks here take 21-3/8 in or 21-1/4 in blades, and the 46 in decks take 22-7/8 in blades. The UDC listing notes that blade length is measured diagonally from one end to the other. Never force a longer blade under a deck it was not made for.
Mulching, bagging or side discharge
All five are mulching blades, but they mulch differently. The UDC and Oregon use gator-style teeth with air lift, the Fismiuta uses a high-lift aerodynamic design, and the BDELI uses a toothed triple-function edge. For heavy bagging, the higher lift figures (1 in on the UDC, 1-1/8 in on the BDELI) move more grass into the bag.
When to sharpen or replace
Dull blades tear rather than cut, leaving brown tips and clumps. The listings here sell replacement pairs, not sharpening services, so plan on a fresh set when the edge will not take a file anymore. Keep the old pair as the backup set for rough work.
Read the manual, keep children and pets out of the yard while you work, wear eye and hearing protection and sturdy footwear, and never exceed the slope rating of your machine. Refuel only with the engine off and cool. See CPSC lawn mower safety. Read our Safety Disclaimer.
Matching It to Your Property
- For 42 in decks, match the mount: 7-point star for John Deere, 6-point star for Cub Cadet and MTD.
- For 46 in decks, the Oregon fits the major brands while the Fismiuta targets Husqvarna and Craftsman.
- Rocky ground favors the boron steel Fismiuta, which the maker claims resists impacts better.
- Store the spare pair dry; the BDELI’s anti-rust paint wears off, and bare steel rusts in a damp shed.
The Acre Score explained
The Acre Score weighs five factors: performance (cut quality and fit), build quality (steel and edge), value (what the listing includes), safety (stated safety features), and warranty (years and coverage). None of the five listings states a safety certification, so every blade scores zero on safety.
| Product | Acre Score | Perf. /35 | Build /25 | Value /25 | Safety /10 | Warranty /5 |
|---|---|---|---|---|---|---|
| UDC Parts GY20850 | 9.6 | 29 | 21 | 20 | n/a | 2 |
| KOFINAM 942-04308-X | 9.5 | 27 | 19 | 20 | n/a | 2 |
| Oregon 96-370 | 9.5 | 30 | 21 | 19 | n/a | 0 |
| Fismiuta 403107 | 9.5 | 29 | 21 | 19 | n/a | 0 |
| BDELI 942-04308 | 9.5 | 28 | 20 | 20 | n/a | 0 |
Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score. Safety counts only for powered gear or where the listing states safety features; where it does not apply, the score is taken over the remaining 90 points.
FAQ: mowing large lots
How do I know which mower blades fit my lawn tractor?
Match three things from the listing: the deck size, the center hole shape and the blade length. The UDC listing asks buyers to verify the complete model number, deck size and the 7-point star pattern before ordering, which is good advice for every blade here.
Are mulching blades good for lawn tractors?
Yes, if the deck and the grass suit them. All five picks here are mulching blades, and the high-lift designs on the UDC, Oregon and Fismiuta also bag well. In very tall or wet grass, side discharge or bagging may work better than mulching.
How often should I replace mower blades?
When the edge will not hold up to sharpening anymore, or when nicks and bends change how the blade spins. Keeping a spare pair on the shelf, like these 2-packs, means the tractor is never down waiting for blades.
Can I put 46 in blades on a 42 in deck?
No. Blade length follows the deck, and the mounts differ too: the 46 in blades here use 5-point and 5-star mounts while the 42 in blades use 6-point and 7-point stars. Buy the blade made for your deck.
Do new mower blades come sharp?
The BDELI listing states its blades come pre-sharpened. The other four listings do not say, so check the edge on arrival and touch it up if needed before the first mow.
More mowing guides
- Best Lawn Mower Blades for Mulching (2026): 5 Top Picks Compared
- Best Mower Blade Sharpener for Lawn Tractors (2026)
- Best Type of Mower Blades (2026)
- How Often Should You Sharpen Mower Blades?
- Best Mower Blade Balancer (2026): 5 Picks Compared
See also the lawn tractor maintenance guide and the best file for sharpening a lawn mower blade.
