How to Sharpen Lawn Mower Blades in Less Than an Hour

HOW TO HOW TO Sharpen Lawn Mower Blades Sharpen Lawn Mower Blades

TOOLS & MATERIALS TOOLS & MATERIALS – Work gloves – Scraper – Safety glasses – Socket wrench – Vise – Bastard-cut mill file *BobVila.com and its partners may earn a commission if you purchase a product through one of our links.

STEP 1 STEP 1 Disconnect the spark plug (on a gas mower) or battery (on an electric mower). Disconnect the spark plug (on a gas mower) or battery (on an electric mower).

STEP 2 STEP 2 Remove the lawn mower blade by loosening the mounting nut with a socket wrench. Remove the lawn mower blade by loosening the mounting nut with a socket wrench.

STEP 3 STEP 3 Clean the blade with a scraper. Clean the blade with a scraper.

STEP 4 STEP 4 Run a bastard-cut mill file along the cutting edge, using a one-way down stroke. Run a bastard-cut mill file along the cutting edge, using a one-way down stroke.

STEP 5 STEP 5 Check the blade’s balance by hanging it on a wall. If the blade tilts to one side, remove more material from that side. Check the blade’s balance by hanging it on a wall. If the blade tilts to one side, remove more material from that side.

STEP 6 STEP 6 Reinstall the blade in the lawn mower. Then flip the mower over and reconnect the spark-plug wire or power source. Reinstall the blade in the lawn mower. Then flip the mower over and reconnect the spark-plug wire or power source.

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