If you’re equipping a 21-inch push mower for mulching, choosing the right blade matters for cut quality, mulching performance, and mower longevity. The following picks are widely compatible with Craftsman, Husqvarna, Troy-Bilt, Cub Cadet, and other popular 21-inch decks. Each option focuses on mulching efficiency, durability, and easy installation.
| Product | Brand | Deck Compatibility | Notes |
|---|---|---|---|
| Grasscool 406712 Mulching Blade | Grasscool | Craftsman, Husqvarna 21 inch | Circle mounting pattern; single blade for mulching |
| Maxpower 331981B 21-Inch Universal | Maxpower | 21″ mowers; universal fit | Includes multiple washers for fitment |
| Hipa 942-0741A Mulching Blade | Hipa | Troy-Bilt, Craftsman, Cub Cadet and more 21″ decks | OEM-style replacement blade |
| Oregon Mulching Blade for 21 in. Deck | Oregon | Cub-Cadet, Troy-Bilt, Craftsman | Bow-Tie center hole; widely compatible |
| Ximoon 2105200317A 2-Pack | Ximoon | Murray and similar 21″ walk-behind mowers | Two blades per pack; built for mulching |
Grasscool 406712 Mulching Blade
The Grasscool 406712 mulching blade is designed for 21-inch Craftsman and Husqvarna push mowers with circle mounting patterns. It replaces several part numbers, including 165833, 175064, 189028, and 532189028. The blade is marketed to reduce the need for frequent blade changes by promoting efficient mulching with a circle hole mounting pattern. For Bow Tie center hole patterns, buyers are advised to search for alternative MPNs. This blade emphasizes compatibility across a wide range of 21-inch decks and provides a circle mounting pattern for straightforward installation.
Key considerations:
- Mounting pattern: Circle Hole
- Compatibility: Craftsman and Husqvarna 21″ decks
- Replaces multiple original part numbers
Maxpower 331981B 21-Inch Universal Mulching Blade
The Maxpower 331981B is a 21-inch universal mulching blade designed to fit a wide range of 21″ lawn mowers. The blade measures 21 inches in length with a 2-1/4 inch width and a 1-inch center hole. It includes a cover washer and a set of six reducing washers in common sizes (3/8″, 7/16″, 9/16″, 1/2″, 5/8″, and 3/16″). This kit aims to simplify compatibility across brands that use standard 21″ blades, enabling quick setup with proper fitment. It’s positioned as a cost-effective, universal mulching blade option for owners with multiple mower models.
Key considerations:
- Length: 21 inches; center hole: 1 inch
- Includes multiple washers for adaptable mounting
- Universal fit across many 21″ mowers
Hipa 942-0741A Mulching Blade
The Hipa 942-0741A mulching blade is an OEM-style replacement designed for a broad set of 21-inch decks, including Troy-Bilt, Craftsman, Yard Machine, Murray, and more. It lists numerous compatible model numbers and emphasizes a 21-inch cut with a circle center hole. This blade is positioned as a direct replacement option that aligns with a wide range of older and newer riding and push mower models, helping maintain cut quality and mulching performance without frequent blade recalibration.
Key considerations:
- OEM-compatible 21″ mulching blade
- Circle center hole; broad compatibility across brands
- Multiple Troy-Bilt, Craftsman, and MTD family compatibility
Oregon Lawnmower Mulching Blade For 21-In Deck
The Oregon B-21-1 mulching blade is designed for 21-inch decks, fitting Cub-Cadet, Troy-Bilt, and Craftsman push mowers. The blade replaces multiple original equipment numbers (e.g., 942-0741, 742-04276, 742-04380, 742-0741) and features a Bow-Tie center hole with 2-1/2″ center-to-center spacing. Oregon emphasizes robust compatibility with a wide range of riding and walk-behind mowers, aiding in efficient mulching and even lawn clippings processing.
Key considerations:
- Bow-Tie center hole; 2-1/2″ center-to-center spacing
- Widely compatible with Cub Cadet, Troy-Bilt, Craftsman
- 21-inch blade for 21″ decks
Grasscool 21 Inch Mulching Blade For Troy-Bilt Cub Cadet
This Grasscool blade targets 21-inch mowers from Troy-Bilt and Cub Cadet families with compatibility across multiple part numbers (742-0741, 942-0741 and related). It lists a broad compatibility range including many MTD/Murray/Cub Cadet models. The blade is designed for mulching with a 21-inch length and a circle center hole, making installation straightforward for many walk-behind mowers. It’s offered as a cost-effective, mulching-specific blade option for existing 21″ decks.
Key considerations:
- Circle mounting pattern; 21″ length
- Broad compatibility with multiple 21″ decks
- Mulching-oriented performance
Buying Guide: Key Considerations For 21-Inch Mulching Blades
Choosing the right mulching blade depends on mower brand, mounting pattern, and the type of mulching you want. Here are essential factors to compare when selecting a blade:
- Mounting pattern: Circle hole vs Bow-Tie center hole. Confirm the pattern on your original blade before ordering.
- Deck compatibility: While many 21″ blades fit multiple brands, confirm that the blade length, width, and center hole dimension match your mower’s deck.
- Blade length and width: Typical blades are around 21 inches long with 2-1/4 inch width; verify thickness and edge design for mulching efficiency.
- OEM vs aftermarket: OEM blades offer precise fit, while aftermarket blades may provide cost savings and broader compatibility.
- Number of blades: Some setups use single blades; others use paired blades for enhanced mulching coverage. Check your mower’s guidance for blade count.
- Hardware included: Some products include washers, spacers, or mounting hardware—essential for proper fitment and vibration control.
- Material and durability: Look for high-strength steel and sharpenability for longer life and cleaner cuts.
- Maintenance: Regular inspection and sharpening extend blade life and cut quality; replace if damaged or excessively dull.