Oregon 40-707 Blade, 3-1/2", Flail Set - 52pc.

What It Is

This is a 52-piece flail blade set for EGO Power+ mowers, designed to replace the factory blades on select EGO models that use a flail-style cutting system (not a standard single blade). It’s for mulching and bagging grass and light debris, not for heavy-duty brush cutting.

Fitment & Compatibility

Before buying, check your mower’s model number. This set fits specific EGO 21-inch and 56-volt mowers (e.g., LM2100, LM2101, LM2102SP). It does not fit 20-inch or self-propelled models with a different blade count or shape. Verify your mower uses 52 flail blades (some models use 48 or 30). Measure your existing blades—Oregon 40-707 blades are 3.5 inches long, 0.75 inches wide, with a 0.25-inch mounting hole. If your factory blades are a different size or shape, stop here. This is an aftermarket part, not OEM EGO, so double-check compatibility with your mower’s manual or Oregon’s fitment guide.

Key Things to Know

• Quality varies: Some users report blades dull faster than OEM or bend on thick grass. Inspect after first few uses.
• Installation is straightforward: Remove the single bolt holding each flail blade (use a socket or wrench), replace one at a time. No special tools.
• Torque matters: Tighten mounting bolts to 15-20 ft-lbs. Over-tightening can strip the plastic deck; under-tightening can cause blade ejection.
• Not for heavy use: These are light-duty mulching blades. Avoid rocks, sticks, or tall weeds—they’ll chip or snap.

Should You Buy It

If you own a compatible EGO 21-inch flail mower and want a budget-friendly replacement set (roughly half the price of OEM), this works for regular lawn maintenance. But if you mow rough terrain, tall grass, or need maximum durability, stick with OEM EGO blades.