21 Inch Mulching Blade - Lawn Mower Blade for Cub Cade MTD Craftsman Troy Bilt TB110 TB200 TB320 Some 21" Walk Behind Push Mower Replace Parts 942-0741A 742-0741 742-0741A 942-0741 (2 PCS)

What It Is

This is a set of two 21-inch mulching blades designed for Cub Cadet, MTD, Craftsman, and Troy-Bilt walk-behind push mowers, including the TB110, TB200, and TB320 series. They replace OEM part numbers 942-0741A, 742-0741, 742-0741A, and 942-0741.

Fitment & Compatibility

Before buying, confirm three things:

1. Deck size: You must have a 21-inch cutting deck. Measure the blade length from tip to tip—if it’s exactly 21 inches, these fit.
2. Center hole: These blades have a 5-point star center hole (common on MTD/Cub Cadet decks). Check your current blade’s hole shape; if it’s a round or 4-point hole, these won’t work.
3. Model number: While they fit many MTD-platform mowers, verify your specific model (e.g., TB110, 12A-xxx) against the part number list. Cross-reference with OEM part 942-0741A to be safe.

Key Things to Buy

• Quality: These are aftermarket blades made from hardened steel. They are not OEM but match OEM specs for thickness and balance. Expect good durability for residential use.
• Installation difficulty: Easy—requires a socket wrench and blade removal tool (or block of wood to stop the blade). Torque the center bolt to 30-40 ft-lbs.
• Common gotchas:
  • The star center hole can be tight on some spindles. If it doesn’t slide on, lightly file the spindle.
  • Mulching blades have a curved, high-lift design. Do not use on side-discharge mowers without a mulching plug installed.
  • Always check blade balance after installation using a blade balancer (or nail in a wall). Unbalanced blades cause vibration and damage.
• Price vs. value: $23.99 for two blades is a solid deal. OEM singles cost $15-20 each.

Should You Buy It

If you own a 21-inch MTD/Cub Cadet/Craftsman/Troy-Bilt push mower with a star-center blade and want an affordable mulching upgrade, this is a smart buy. It’s a direct fit for common residential models, and the two-pack saves you money. Avoid if your mower uses a round-center blade or you need a bagging/standard blade.