8TEN LawnRAZOR Mower Blade for Husqvarna HU550F HU550FH HU675FE HU725E HU725FH HU775H 580244001 580244002 (Toothed)

What It Is

This is a toothed mulching blade designed for specific Husqvarna walk-behind mowers, replacing OEM part numbers 580244001 and 580244002. It’s built to shred grass clippings into fine particles for lawn feeding, rather than side-discharging or bagging.

Fitment & Compatibility

Before buying, confirm your mower deck size and model number. This blade fits Husqvarna HU550F, HU550FH, HU675FE, HU725E, HU725FH, and HU775H models only. Measure your existing blade: it must be 21 inches long with a 1-inch center hole and a 0.25-inch thickness. It’s an aftermarket replacement for OEM Husqvarna blades—do not assume it fits other brands or deck sizes. Check your mower’s underside for a single-center-mount blade (no adapter required).

Key Things to Know

• Quality vs OEM: Users report similar durability to Husqvarna factory blades, but the 8TEN coating may wear faster in sandy or rocky soil.
• Installation: Straightforward if you have a socket wrench and thread locker. Torque the center bolt to 35–45 ft-lbs.
• Sharpness: Comes sharp out of the box, but toothed blades dull faster than standard blades—plan to sharpen or replace every 10–15 hours of use.
• Gotcha: The toothed design is for mulching only; it will not work well for bagging or side-discharge. Ensure your mower has a mulching plug installed.

Should You Buy It

Buy this if you own one of the listed Husqvarna models and want an affordable mulching blade that’s a direct-fit replacement for OEM parts. It’s best for homeowners who mow frequently and prioritize fine clipping breakdown over bagging. Skip it if you need a universal blade or plan to switch between mulching and discharge modes.