How to Sharpen a Mower Blade With an Angle Grinder

Posted by Delta Gatti on Tuesday, March 12, 2024

Introduction

There are several good ways to sharpen lawn mower blades, but one of the quickest and easiest methods is with an angle grinder, an inexpensive, versatile hand-held power tool.

You wouldn’t take care of grass that’s too long by tearing off the end of each blade, would you? But that’s exactly what a dull lawn mower does, leaving the torn grass vulnerable to sun damage and disease. You could sharpen your mower blade with a file (it takes forever!), a rotary tool or a bench grinder, but we’ll show you how to do the job with an angle grinder. It’s fast and easy. If you don’t own a grinder, they don’t cost much to buy and can be used for all kinds of other tasks too.

To sharpen your lawn mower blade, you’ll need a socket or wrench to fit the blade nut. Tough nuts may call for a breaker bar and/or a penetrating lubricant. You’ll also need two clamps, a block of wood and, of course, an angle grinder with a metal grinding blade.

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