532405380 Mulching Blades for AYP Ariens Craftsman Husqvarna 46 Inch Deck - Heavy Duty Blade Replaces 405380 403107 532403107-2 Pack

What It Is

This is a set of two heavy-duty mulching blades designed for 46-inch cutting decks on AYP, Ariens, Craftsman, and Husqvarna lawn tractors. They replace OEM part numbers 405380, 403107, and 532403107, and are intended for machines with a 46-inch deck that require a specific blade shape for mulching (not bagging or side-discharge).

Fitment & Compatibility

Before buying, verify these three things:

1. Deck size: Must be exactly 46 inches (measured blade tip to blade tip). This blade will not fit 42-inch or 54-inch decks.
2. Blade measurements: OEM specs: 20.5-inch length, 1-inch width, 0.25-inch thickness, with a 5-point star center hole (7/8-inch center hole version also exists—check your spindle). The star pattern is common on AYP/Craftsman decks, but some spindles use a round hole with a keyway. Measure your current blade’s center hole shape before ordering.
3. Model/brand fit: Fits most AYP-built Craftsman, Husqvarna, and Ariens tractors with 46-inch decks from the 1990s onward. Not compatible with MTD, John Deere, or Toro decks—those use different mounting patterns. Cross-reference your model number with the OEM part numbers listed above.

Key Things to Know

• Quality: Heavy-duty 3/8-inch thick steel (thicker than standard OEM blades). Good for mulching leaves and grass, but may require more engine power—not ideal for underpowered mowers (under 20 HP).
• Installation: Direct bolt-on if your deck uses the star center hole. Use a torque wrench (spec: 70–90 ft-lbs) and a blade removal tool. The blades are marked “this side up” and have a slight upward curve at the tips.
• Common gotcha: These blades are for mulching only—they will not fit a bagging or side-discharge deck without modifications. If your deck has a removable mulch plug, you must install it for proper mulching action.
• Balance: Pre-balanced, but always check balance after installation with a blade balancer. Unbalanced blades cause vibration and spindle wear.

Should You Buy It

Buy these if you have a 46-inch AYP/Craftsman/Husqvarna tractor, want heavy-duty mulching performance for leaves and thick grass, and don’t mind the extra weight. Skip if you need bagging or side-discharge blades, or if your deck uses a round center hole with a keyway—those require a different blade. For $29.99, they’re a solid upgrade over standard OEM blades.