How To Sharpen Lawn Mower Blades Without Removing

Charlotte Miller

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It’s time for spring lawn mowing, and you need to sharpen your lawnmower blades. You don’t want to remove the blade from the mower because it’s hard work. Fortunately, there are many ways that you can sharpen a lawnmower blade without removing them. Here are some tips on how to sharpen your blades without removing them.

How to Sharpen the Blades of the Lawnmower?

Given below are some ways by which you can sharpen your lawnmower blades without removing them. If you are looking for a professional kyle’s lawn mower repair service for saving time, you can go for it.

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Use a file to remove rust and sharpen the blade of the mower

A rusted blade will not cut grass properly, so use a metal file to rub it on each side until all of the rust is gone. Why did the Rust form in the first place? After working for several years or when exposed to harsh weather conditions such as rain, moisture gets into spaces between teeth that hold cutting edges together and cause corrosion. This makes sharpening very difficult, but following the above process will easily help you get rid of this problem.

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Sharpen Lawn Mower Blades with Sandpaper

You don’t need any special tools other than sandpaper (coarse) and a flat surface to do this. Grind the blade on sandpaper as you would with any fine tool, and then use it as normal. Sanding your blades will not only sharpen them but also remove built-up gunk that’s accumulated over time.

Sharpening Lawn Mower Blades With A Bench Grinder

Using a bench grinder is one of the easiest ways to sharpen lawn mower blades without removing them from your machine. You can either use an electric or gas-powered bench grinder for the sharpening process, depending upon what type of results you are looking for. The downside, however, is that using a power tool isn’t recommended because it may cause damage to your deck if there is an accident during the sharpening process itself.

Using Wheel-Type Sharpening Tool

Another great option to sharpen lawn mower blades without removing them is using wheel-type sharpening tools. However, you need to be very careful while working with these tools because they can cause serious injury if not used properly.

When to Sharpen Your Lawn Mower Blades?

You need to sharpen your lawnmower blades once a year for the best results. If you have been using the same mower blade for several years without sharpening it, then there is no way to give the desired performance as before. Sharpening can also be required when you notice uneven wear on each side of the cutting edge. It’s advisable not to wait until this happens because if one side gets more worn out than the other, then grass may get thrown off in an undesirable direction and cause damage to your plants.

Should Both Sides of a Lawnmower Blade be sharpened?

Both sides of the blade should be sharpened equally even if it does not look worn out. If you do not, then your lawnmower may throw grass in an undesirable direction and cause damage to plants or other objects in your lawn.


If you don’t want to remove the blade from your lawnmower but still need to sharpen it, try using a bench grinder. It will work best if you use a grinding wheel with an 80 grit surface and run it at about 30-60 rpm for 10 seconds or so. You can then polish up the blade’s edge by running it over some 100 grit sandpaper on another flat surface before putting it back in place. Be careful not to grind too much metal off, though, as this could lead to problems later down the line, such as wobbling blades causing uneven cutting and damage to other parts within your lawnmower engine.