Fismiuta 21-inch Lawn Mower Mulching Blade - 21" Circle Mulching, Heat-Treated 40MnB Steel, Balanced OEM Fit for Craftsman/Husqvar

Fismiuta's 21-inch circle mulching blade is a heavy-duty replacement designed to fit 21" push mower decks from Craftsman, Husqvarna, AYP and similar models, providing improved impact resistance, cleaner cuts and balanced operation.

When your mower needs a reliable replacement blade that matches OEM fitments like 406712, 532406712, 189028 or 165833, this Fismiuta blade offers a direct-fit option engineered for longer life and better cutting performance. Forged from industrial 40MnB boron steel and heat-treated across the whole body, it addresses common problems such as brittle failure, rapid dulling and vibration that shorten mower life and worsen lawn appearance.

Will this blade fit my Craftsman or Husqvarna 21" deck?

Check the center hole style and part numbers on your current blade or in your mower manual. This Fismiuta blade uses a circular center hole and replaces a wide range of OEM numbers across AYP, Craftsman and Husqvarna model lines.

• Compatible OEM references include 165833, 175064, 189028, 406712, 532406712 and 532189028.
• Fits many 21" push/walk-behind decks — confirm your mower SKU or blade stamping first.
• Designed for circle mulching decks where medium-lift airflow is required.

How does this blade improve cutting and mulching performance?

The blade's medium-lift aerodynamic profile generates a strong vortex that lifts grass into a single-pass shear for an even cut. That airflow also feeds clippings into your bag or mulching chamber more efficiently, reducing re-runs and uneven clumps.

• Medium-lift geometry pulls grass upright for cleaner cuts and consistent mulching.
• Sharper edge area and better edge retention reduce tearing and yellowing of grass.
• Optimized airflow increases bag fill rates, even in damp or dense lawns.

Is the Fismiuta blade more durable than stock replacements?

Yes — the blade is forged from 40MnB boron steel and receives full-body heat treatment to raise toughness and resilience. That combination yields notably higher impact resistance and better protection against sudden breaks from rocks or roots.

• Full-body heat treatment for enhanced structural strength and shock tolerance.
• 35% higher impact resistance versus many low-cost carbon steel blades.
• Powder-coat finish adds rust and abrasion resistance for longer service life.

Will installing this blade affect vibration or motor wear?

Fismiuta blades are digitally dynamically balanced to eliminate high-speed wobble that causes vibration. Balanced operation reduces stress on the spindle and engine, and the coating helps preserve the blade surface to maintain balance over time.

• Digital dynamic balancing minimizes vibration and high-speed wobble.
• Powder coating protects against rust and UV, keeping weight distribution consistent.
• Reduced vibration helps extend motor and deck component life.

Who is this for: Lawn care enthusiasts and homeowners who need a dependable, OEM-compatible 21" replacement blade for Craftsman, Husqvarna or other AYP-based push mowers. Choose this Fismiuta blade if you want a tougher, better-balanced mulching blade that holds a sharper edge longer and moves clippings efficiently into your bag or mulching chamber. Always verify the part number and center hole type on your current blade before ordering to ensure proper fit.