Dewalt Blade Mulching Mower REPL 21IN DWO1DT233

What It Is

The Dewalt DWO1DT233 is a 21-inch replacement mulching blade designed for Dewalt walk-behind mowers. It chops grass clippings into fine particles to return nutrients to the lawn, eliminating bagging.

Fitment & Compatibility

• Deck size: Fits 21-inch mower decks only. Measure your existing blade or deck width to confirm.
• Model compatibility: Direct replacement for Dewalt DCMW220, DCMW225, DCMW240, and DCMW245 mowers. Not designed for other brands.
• OEM vs aftermarket: This is a genuine Dewalt OEM blade—guaranteed fit for listed models. Aftermarket blades may require modification.
• Measurements: Blade length is 21 inches, center hole diameter is 1 inch, and thickness is 0.125 inches. Verify these against your current blade.

Key Things to Know

• Installation difficulty: Easy—requires a socket wrench and blade removal tool (or a block of wood to hold the blade). No special skills needed.
• Mulching performance: The curved, sharpened edges produce fine clippings, but only with a dedicated mulching mower or plug. Using on a side-discharge deck won’t work well.
• Durability: Heat-treated steel holds an edge for several mows, but hitting rocks or roots will dull it quickly. Check for bends before each use.
• Common gotcha: Some users report the blade is slightly heavier than stock—this can affect balance on older mowers. Always balance after installation.

Should You Buy It

If you own a compatible Dewalt 21-inch mower and want consistent, fine mulching without bagging, this OEM blade is a reliable choice. It’s easy to install and performs well on typical turf, but skip it if you need a universal blade or your mower is from another brand.