How To Sharpen Lawn Mower Blades

If there is one thing that most people don’t think about when they are using their mower, it has to be the blades. Even though the blades are one of the most important parts of any mower, it is often the one part that is the most neglected. That’s probably because most people don’t know that not only do blades need to be sharpened on a regular basis, but they often need to be sharpened before the lawn mower is used for the first time. That’s right. Most lawn mowers come with blades that are dull, and this is done merely for safety reasons.

Another thing that keeps people from sharpening their blades is not wanting to spend the money to take it to a sharpening service. That’s okay, because today I am going to give you one of the best lawn mower sharpening guides you will ever receive. This guide will show you just how easy it is to sharpen your blades.

Step One

The first thing that you will need to do is remove the blade. You can do that by locating the nut that holds the blade to the underside of the deck and loosening it with a wrench. However, before you start to remove this nut you’ll need to use a little caution. You will want o remove the spark first so the mower doesn’t accidentally start while you are removing the blade. You can do this by disconnecting the spark plug from the mower. You might also want to consider wearing heavy leather gloves to prevent the blade from cutting you while you are handling it.

There is one final thing you might want to do before you remove the blade, but this part really depends on whether you think you need to do it or not. Some people mark the blade with a bit of spray paint so they know which way to re-install it. If you don’t feel like you need to do this, then you can skip it but it does make it easier to re-install the blade.

Step Two

Wearing your gloves, insert the blade into a vise and grab your file. Start by sharpening the top side of the cutting edge. Use even strokes and push down and to the side. Make sure that you use the same amount of strokes on each side of the blade to keep the blade balanced. It usually takes less than 40 strokes on each side of the blade to sharpen it. During this step, don’t try to put a razor-sharp edge on the blade. That will only result in the blade dulling faster. Instead, just sharpen it to about the sharpness of a butter knife.

Step Three

Now that you have sharpened your mower blade, it is time to make sure it is still well balanced. You can do this by hanging it from the center hole on a nail. If one side tilts, then file a little bit more metal off that side until the blade balances. This is a trick that I learned by reading some comments by professional blade sharpeners posted in the comment sections of various lawn mower reviews.

Step Four

The last step is putting the blade back on the mower. Make sure that you re-install the same way it came installed (this is where the spray paint comes in handy) and be sure to securely tighten the bolt holding the blade to the mower. You are now ready to mow your lawn with a newly sharpened blade.