Arnold (490-100-0082) 3-in-1 Lawn Blade-For 22-Inch Walk-Behind Mowers Universal Fit

What It Is

The Arnold 490-100-0082 is a universal 3-in-1 lawn blade for 22-inch walk-behind mowers, designed for mulching, bagging, and side-discharge. It’s a direct-fit aftermarket replacement for many popular OEM blades, including those from MTD, Craftsman, and Troy-Bilt.

Fitment & Compatibility

Before buying, confirm these three things:

• Deck size: This blade is made for 22-inch cutting decks only. Measure your deck’s blade-to-blade path if unsure.
• Center hole & spindle: The blade has a 5-point star center hole that fits most universal spindles, but check your mower’s spindle shape. It’s not compatible with round-center-hole spindles.
• OEM cross-reference: It replaces MTD 942-0424, 742-0424, and many others. Verify your mower’s model number against Arnold’s fitment list online—this is not a guaranteed fit for every 22-inch mower.

Key Things to Know

• Material & durability: Made from heat-treated steel. Holds an edge reasonably well but may dull faster than premium OEM blades on heavy use.
• Installation: Straightforward—remove the old blade, install with the lift wings facing up. Use a torque wrench to tighten to 30–40 ft-lbs. No special tools needed.
• Common gotcha: The star hole can be tight on some spindles. If it doesn’t seat fully, do not force it—return and verify your spindle type.
• Balance: Each blade comes pre-balanced, but always check with a balancer before installing to avoid vibration.

Should You Buy It

If you own a 22-inch walk-behind mower with a 5-point star spindle and need a solid, affordable 3-in-1 blade, this is a reliable choice. It’s not the longest-lasting option for commercial use, but for residential lawns, it offers good value and easy replacement. Skip it if you have a round-center spindle or need a premium-grade blade for tough conditions.