Keep your lawn looking great with sharp blades #grasscutting

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Sharpening lawnmower blades—it's that time of year again. Over the years, I've tried various methods, from using a Dremel with a sanding barrel to experimenting with a few gimmicks, but they were all too time-consuming. Now, I rely on an angle grinder with a 60 or 80 grit flap disc for quick and efficient sharpening. Today, I'll show you how to square off the edge to remove nicks without removing too much material and then follow the factory curve to maintain the blade's integrity. Checking the balance is crucial to prevent your lawnmower from shaking excessively; if one side is heavier, grind it down until balanced. Sharp and balanced blades ensure a clean cut and healthy grass, so if you notice brown tops or ragged ends on your lawn, it's time to sharpen those blades.

In this video, I'll walk you through sharpening and balancing a relatively new blade from last year. The first step is to square it off by carefully tipping it up and removing a minimal amount of material. This method ensures there are no nicks left. I start by squaring it off, then proceed to sharpen it using an angle grinder with a flap wheel. The blade isn't in terrible shape, but it could use a bit more depth in some spots. I might make a couple more passes to smooth out a few remaining dings, and then do the same on the other side before continuing.

Once squared off, try to follow the original angle as closely as possible to maintain the factory shape. You'll know you have the right angle on the grinder when the area starts to shine, indicating you're touching all the necessary spots. Make sure to watch for balancing issues and ensure you're working the entire area evenly.

Next, you need to remove the burrs by giving the blade a pass on the bottom. This step is crucial, but remember, you don’t need a knife-like edge as it will dull quickly. After removing the burrs, you may still see some nicks, but grinding too much material off would reduce the blade’s lifespan. Aim to make the blade last as long as possible by being conservative with material removal. Repeat this process for the other side.

To check if the blade is balanced, place it in the center. This particular blade can be tricky to center, but once it’s balanced, you may need to remove a bit more material from the heavier side. Adjust until the blade moves less and feels balanced.

I hope this video helps you understand how to sharpen and balance your own blades. If you notice brown tops on your grass or ragged edges after cutting, it’s a sign your blades need sharpening. The process is straightforward, but remember to balance the blades to avoid causing your lawnmower to shake excessively. Don’t forget to hit the subscribe button below, and I hope to see you in the next video.
00:00 Introduction
01:15 Sharpening the lawnmower blade
05:57 Balan