134871 Mulching Blade Compatibles with Crafts man 20" Deck, 145106 Lawnmower Mulching Blade Compatibles with Hus qvarna 50DK, 51D, 51MD, H51MDB, 51MDT，Replaces for 146749 532145106 PP22055

What It Is

This is a mulching blade designed to cut grass into fine clippings that decompose quickly, returning nutrients to your lawn. It’s a direct replacement for Craftsman 20-inch deck mowers (model 134871) and select Husqvarna 50-51 series models (50DK, 51D, 51MD, H51MDB, 51MDT).

Fitment & Compatibility

Before buying, verify these three things:

• Deck size: Must be exactly 20 inches. Measure your mower deck’s cutting width (blade tip to tip) if unsure.
• Model match: Fits Craftsman 134871 and Husqvarna 50DK, 51D, 51MD, H51MDB, 51MDT. Also replaces OEM part numbers 146749, 532145106, and PP22055. Check your owner’s manual or existing blade part number.
• Measurements: Blade length is 20 inches, center hole diameter is typically 1 inch (standard for most 20-inch decks), and thickness is about 0.15 inches. Confirm these match your current blade.

Key Things to Know

• Quality: At $23.99 with 4.0 stars (8 reviews), it’s a budget-friendly aftermarket option. Expect decent steel but not premium hardness—may dull faster than OEM on rocky or sandy soil.
• Installation: Easy DIY job if you have a socket wrench and blade removal tool. Torque to 30-40 ft-lbs. Always disconnect the spark plug first.
• Common gotchas: This is a mulching blade (curved, with extra cutting surfaces), not a standard lift blade. It won’t bag or side-discharge as effectively. Also, double-check the center hole shape—some Husqvarna models use a star-shaped hole, but this blade uses a round one.
• Balance: Aftermarket blades sometimes need balancing. Use a blade balancer or a nail in the wall to check before installing.

Should You Buy It

Yes, if you own a compatible Craftsman or Husqvarna 20-inch mower and want an affordable mulching blade for fine-clipping lawns. Skip it if you need a bagging or standard lift blade, or if your deck has a non-round center hole. For the price, it’s a solid value for light-to-medium use.