9 Best Craftsman Lawn Mower Blade Replacements of 2025

This mulching powerhouse delivers precision and performance for homeowners battling thick grass and uneven terrain. Engineered as a direct replacement for the OEM 942-0741A, it features a bow-tie center hole designed specifically for models like Troy-Bilt and Craftsman with matching spindles, ensuring secure fitment and vibration-free operation. With its high-lift design, aggressive curves, and 3-in-1 functionality (mulching, bagging, side discharge), this blade creates intense airflow that recirculates clippings for finer mulch—ideal for nutrient-rich lawn feeding without clogging.

In real-world testing across damp, overgrown lawns and dry, patchy yards, the Grasscool blade consistently produced finely shredded clippings, reducing the need for bagging and minimizing deck buildup. Measuring 21″ long with a thickness of 9/64″, it holds up well under moderate stress, though extremely rocky terrain may challenge long-term edge retention. The factory-applied protective paint on the cutting edge wears off quickly during initial use—a smart safety and anti-rust feature—but reveals a pre-sharpened edge underneath. While it performs admirably on most 21″ decks, improper spindle alignment due to incorrect model matching can lead to imbalance or mounting issues.

Compared to budget alternatives, this blade stands out with rigorous quality testing, including Rockwell Hardness and Blade Chip evaluations, giving it an edge in durability over generic copies. It’s best suited for homeowners with Troy-Bilt, MTD, or Craftsman mowers who prioritize clean mulching performance and reliability over raw cutting aggression. Against the UDC Parts 2-pack, it offers similar specs but at a slightly higher individual cost—though the comprehensive compatibility list and performance validation make it a more confident single-blade upgrade for those seeking proven results without compromise.

If you’re looking for maximum value without sacrificing fit or function, the UDC Parts 21-inch mulching blades are a standout choice. This 2-pack delivers long-term savings and peace of mind, offering identical specifications to OEM 942-0741A blades—21″ length, bow-tie center hole, and 1-7/64″ air lift—making them ideal for frequent replacements or keeping a spare on hand. Designed for Troy-Bilt, Craftsman, MTD, and Cub Cadet models, they cover an extensive range of mowers, from the TB100 to the TB490XP and Craftsman M140 to M270.

During testing, these blades performed reliably on both flat and hilly lawns, maintaining consistent airflow and clipping dispersion thanks to their medium-high lift profile. The 0.126″ thickness provides a solid balance between durability and weight, allowing efficient spin-up without straining smaller engines. Installation is straightforward, and like many premium replacements, the cutting edges come with a protective paint coating—a subtle but important touch that prevents rust and installer injury. However, in dense, wet grass, there was minor buildup after prolonged use, indicating that while airflow is strong, it’s not quite top-tier.

When stacked against the Grasscool single blade, the UDC set wins on cost-per-blade efficiency and sheer breadth of compatibility, supporting everything from Yard Machines to White Outdoor models. It’s the go-to option for DIYers and seasonal maintainers who want affordable, OEM-matching performance across multiple machines or over multiple seasons. For users needing just one blade, it may be overkill—but for those tired of paying premium prices for single replacements, this pack offers exceptional bang for the buck.

For budget-conscious homeowners who still demand solid performance from a single replacement, the budrash 942-0741A blade punches above its weight. Priced to move, it delivers the essential 3-in-1 mulching functionality—bagging, discharging, and mulching—with a contoured design that promotes airflow and recutting within the deck. At 21″ long with a 1/8″ thickness and bow-tie center hole, it matches OEM specs for Troy-Bilt, Craftsman 247 series, and select MTD and Cub Cadet models, making it a reliable fit for common 21″ push mowers.

In practice, the blade handles standard mowing tasks with ease, cleanly cutting dry grass and managing light mulching duties. The pre-sharpened edge performs well out of the box, though it may dull faster than thicker alternatives when tackling coarse or sandy terrain. One notable design choice is the long cutting edges and curved surfaces, which help recirculate clippings—though in thick, wet conditions, some deck buildup was observed, requiring occasional cleaning. Still, for average suburban lawns, it provides a clean, even cut with minimal vibration when properly balanced.

Compared to the Grasscool and UDC options, the budrash blade lacks extensive testing validation and brand pedigree, but it holds its own in real-world usability. It’s best for users who need a no-frills, affordable fix for an aging blade and don’t mow large or challenging yards. While it doesn’t offer the longevity or premium feel of higher-end models, it delivers core functionality at a wallet-friendly price, making it a smart pick for occasional use or as a temporary replacement.

When authenticity and OEM precision matter most, the MTD Genuine 942-0741A blade is the gold standard for compatibility and reliability. As a factory-original part, it’s engineered to exact specifications for 21-inch MTD, Craftsman, Troy-Bilt, and Yard Machines decks manufactured from 1995 onward, ensuring seamless integration with zero guesswork. The perfect spindle alignment and strict quality control mean minimal vibration, optimal balance, and long-term durability—critical for maintaining mower health and cut consistency.

Real-world performance confirms its reputation: the blade excels in mulching mode, finely chopping clippings and returning them to the soil with efficient airflow. Its design supports bagging and side discharge as well, though it lacks the ultra-high lift of some aftermarket variants. At 21″ with a bow-tie center, it fits walk-behind models like the 11A-B0BL765 and SC621E flawlessly, provided users verify their model number against the manual. One limitation: it doesn’t include the same level of rust protection as coated aftermarket blades, so storage in damp conditions may lead to surface oxidation over time.

Against third-party alternatives like Grasscool or UDC, this blade doesn’t offer extras like paint-coated edges or extensive marketing claims—but it wins on trust and consistency. It’s the ideal choice for owners who refuse to risk fitment issues or subpar materials, especially those maintaining older Craftsman or Troy-Bilt mowers. While slightly pricier than some generics, it delivers unmatched OEM assurance, making it the top pick for purists and long-term maintainers who value factory-perfect performance over cost savings.

For owners of Craftsman, Husqvarna, or Poulan mowers with round-center spindles, the Grasscool 21-inch round-hole mulching blade is a precision-engineered solution that eliminates the frustration of mismatched replacements. Unlike bow-tie variants, this blade features a 5/8″ round center hole, making it compatible with a different class of 21″ push mowers—particularly older or mid-tier Craftsman models where spindle designs vary. With a thickness of 5/32″ and a medium lift of 1-1/8″, it delivers strong mulching performance without overloading smaller engines.

Field testing showed excellent performance on dry, medium-height grass, with efficient recirculation and fine mulch output thanks to its contoured design. The blade handled moderate bagging duties well, though side discharge was less aggressive than high-lift models. The protective paint on the edge wears off quickly during first use—expected behavior—and reveals a sharp, ready-to-cut profile underneath. One caveat: because round-hole spindles are less common, users must verify their spindle type carefully to avoid buying the wrong fit.

Compared to the wyevee 331737B, which also serves round-hole systems, this Grasscool model offers broader compatibility across Husqvarna and Poulan lines, making it a versatile choice for multi-brand households. It’s best suited for homeowners with 21″ self-propelled or push mowers needing a dependable, ready-to-install mulching blade without exotic features. While not the thickest or most aggressive option, it strikes a balanced blend of performance, fit, and value—especially for those tired of guessing which blade fits their unique mower.

When it comes to high-performance cutting on 42-inch decks, this 2-pack delivers serious lift and aggressive discharge for riding mowers from Craftsman, Husqvarna, and Poulan. Featuring a 5-point star center hole and 1/6″ thickness, these blades are built for models like the Craftsman DYT4000 and Husqvarna YTH18542, where strong airflow and bagging efficiency are critical. The high-lift design generates powerful suction, making it ideal for bagging leaves or tackling tall grass without clogging.

In real-world use, the blades excel in high-speed mowing and heavy-duty clearing, throwing clippings forcefully into the bag or out the chute. Each 21″ blade is precision-balanced and sharpened, ensuring smooth operation even at full throttle. The 2-pack format is a major advantage for riding mower owners, who typically need two blades—and replacing both at once ensures balanced, vibration-free cutting. However, in mulching mode, the aggressive lift can sometimes blow clippings out instead of recirculating them, reducing mulching efficiency compared to medium-lift alternatives.

Stacked against the Grasscool 42″ medium-lift blade, this set prioritizes discharge power over mulching finesse, making it better for users who bag frequently or mow large, open lawns. It’s also more affordable than USA-made MaxPower blades while offering similar fit and function. For Craftsman LT1000 or Husqvarna YT series owners who want maximum cutting aggression and value, this 2-pack is a smart, practical upgrade that keeps the mower running strong season after season.

Engineered for optimal balance between mulching finesse and deck clearance, the Grasscool 42-inch medium-lift blade is a smart upgrade for riding mower owners who prioritize clean, even mulching over raw discharge power. With a 7/8″ lift and 5-point star center hole, it fits Craftsman LT1000, LT2000, YT3000, and Husqvarna YTH18542 models—provided they don’t use the 6-point star variant. At 5/32″ thick, it’s built to endure regular use while resisting warping under heat and stress.

Testing revealed excellent mulching performance, with clippings finely chopped and evenly dispersed back into the lawn. The medium lift reduces strain on the engine compared to high-lift blades, making it ideal for older or lower-powered tractors. Airflow is smooth, and clogging is minimal, even in moderately thick grass. Like other Grasscool blades, it includes protective paint on the edge and undergoes rigorous performance testing—adding credibility to its durability claims. However, it’s not designed for heavy bagging, where higher-lift models outperform.

Compared to the high-lift 2-pack, this blade trades discharge aggression for mulching efficiency and engine longevity. It’s the better choice for eco-conscious mowers who want to feed their lawn naturally without overworking the machine. Against MaxPower’s USA-made set, it offers similar performance at a lower price, though with less branding prestige. For Craftsman and Husqvarna riders focused on clean, sustainable mowing, this medium-lift blade is a high-value, high-performance pick.

Proudly made in the USA, the MaxPower 561713B blade set stands out as the premium choice for discerning riders who demand durability, precision, and domestic craftsmanship. Designed for 42-inch decks on Craftsman, Husqvarna, and Poulan mowers, this 2-blade set replaces common OEM numbers like 138971 and 532138971 with exact 5-point star center holes and 21″ length, ensuring a secure, wobble-free fit. The powder-coated finish not only protects against rust but also serves as a safety measure—wearing off during first use to reveal a factory-sharpened edge.

In performance tests, these blades delivered smooth, balanced cutting across varied terrain, with minimal vibration even at high RPMs. The medium-high lift profile supports both effective mulching and reliable bagging, striking a rare balance between the two. Being USA-made, they use higher-grade steel that resists chipping and holds an edge longer than many imported alternatives. While they don’t boast the highest lift, their consistent performance and build quality make them ideal for long-term use.

Compared to the Grasscool and generic 2-packs, MaxPower justifies its higher price with superior materials and origin transparency. It’s the best pick for users who value American manufacturing and long blade life over short-term savings. For Craftsman YT series or Husqvarna YTH owners who mow weekly and want dependable, long-lasting blades, this set offers unmatched peace of mind and cutting consistency.

Tailored for AYP, Craftsman, and Husqvarna 21-inch push mowers with round spindles, the wyevee 331737B blade is a focused, no-nonsense replacement for a specific but common niche. With a round 5/8″ center hole and 21-1/4″ length, it fits models like the Craftsman 917375940 and Husqvarna 5521CM, offering a precise fit where bow-tie blades won’t work. Its 0.157″ thickness and carbon steel construction deliver solid durability for regular mowing, while the pre-sharpened edge ensures immediate performance.

In testing, the blade handled typical suburban lawns with ease, producing a clean, even cut and decent mulching results. The curved side installation promotes airflow, though heavy wet grass led to some deck buildup—common in medium-lift designs. The additional coating enhances rust resistance, a plus for seasonal storage. However, due to its specialized fit, it’s useless for users with star or bow-tie spindles, making verification critical before purchase.

Compared to the Grasscool round-hole blade, the wyevee model offers slightly thicker construction and broader AYP compatibility, making it a better fit for older AYP-based Craftsman mowers. It’s best for users who’ve struggled to find the right round-hole replacement and want a reliable, affordably priced option backed by clear model matching. While not the most versatile, it excels in its targeted application, delivering precision fit and solid performance where it matters most.