Which practice is recommended for keeping rotary mower blades sharp and balanced?

Which practice is recommended for keeping rotary mower blades sharp and balanced?

• A. Replace blades annually only
• B. Sharpen with a file or grindstone and regularly check balance
• C. Sharpen with sandpaper only
• D. Ignore balance and continue mowing

Answer: (B)

Keeping a rotary mower blade sharp and true comes from two steps: restoring a sharp edge with a controlled sharpening method and confirming it spins balanced. Using a file or grindstone lets you carefully reshape the edge and restore the proper bevel, removing metal evenly so the blade cuts cleanly rather than tearing grass. After sharpening, checking balance is essential because an imbalanced blade causes vibration, wears the mower hardware, and can lead to an uneven cut. A blade balancer or a simple nail test helps you find the heavy spot and you remove material from that side until it sits level when spun. If the blade is cracked, bent, or cannot be balanced even after adjustments, it should be replaced. For safety, always disconnect power and secure the blade before sharpening.

Keeping a rotary mower blade sharp and true comes from two steps: restoring a sharp edge with a controlled sharpening method and confirming it spins balanced. Using a file or grindstone lets you carefully reshape the edge and restore the proper bevel, removing metal evenly so the blade cuts cleanly rather than tearing grass. After sharpening, checking balance is essential because an imbalanced blade causes vibration, wears the mower hardware, and can lead to an uneven cut. A blade balancer or a simple nail test helps you find the heavy spot and you remove material from that side until it sits level when spun. If the blade is cracked, bent, or cannot be balanced even after adjustments, it should be replaced. For safety, always disconnect power and secure the blade before sharpening.