10 Best Lawn Mower Blade Sharpener Reviews of 2020

The best lawn mower blade sharpener refers to an essential tool to prepare a highly appealing lawn specifically in mowing seasons. You have to sharp the lawn mower blades so that your lawn could be mow in a tidy and effective manner through the blades. Moreover, if the mower blades are accurately sharpened, then they won’t cause any harm to your grass.

Sharpened and professional blades take no or less time for cutting the grass. These blades can also reach the edges of your lawn easily. If you possess old blades or if they have become dull over time, then you need to sharpen them for seeing effective results. The best way to sharpen a lawn mower blade is with a blade sharpener. It is very easy to use a blade sharpener.

Plus, these tools are cost-effective for maintaining the sharpness of your lawn mower blades. Here, we will discuss some of the best lawn mower blade sharpeners available on the market. To help you out with how to select the most perfect blade sharpener for yourself, we have also provided a detailed buying guide here.


How to balance and sharpen lawn mower blades?

For maintaining a healthy and green lawn, gardeners need to grind their blade edge regularly. The sharp edge of your blade cuts cleanly and evenly. Thus, it assists you in reducing the time you spend mowing the lawn. Therefore, you should sharpen your lawn mower blade twice every season. If you have not sharpened a lawn mower blade before, then here are some tips that you can use while sharpening the lawn blade.

1. Eliminate the spark plug

A spark plug stops the motor from operating accidentally. One can tape or tie it back for stopping it to come closer near the cap.

2. Turn the lawn mower on another side

It is good to turn the lawn mower upside down. Make sure that the carburetor and air filter are on the upper side. By doing so, you can prevent oil from dripping to the filter.

3. Remove your blade

For clamping the edge, one can wedge a short around 2*4 between the blade and the deck. Using a large wrench, you can loosen the nuts. Turn the wrench counterclockwise and then, remove the bolt and blade.

4. Sharpen your blade

Now, sharpen the blade edges by clamping it with a blade sharpener. Keep the lawn mower blade sharpener at the same angle. Keep on filing until the blade edges are sharp.

5. Keep the accurate filing angle

Make sure that you keep the original cutting angle all the time while filing the blade edge.

6. Examine the balance

For checking the balance of your blade, you need to hang the blade on some nail. Make sure that the file keeps on that side while the edge remains horizontal a bit.

7. Reinstall the blade

Prior to put a screw in the bolt, it is necessary to reinstall the blade edge. Now, wedge the short 2*4 back inside and tighten that bolt with the socket bar and breaker. Also, you have to ensure that it’s balanced before installing it. If it is unstable, then it will result in vibration and damage the bearings of the blade.

Safety Factors to Consider While Using Lawn Mower Blade Sharpeners

Safety is utmost important when using a blade sharpener, especially if you are a beginner. Electric blade sharpeners are pretty safe as compared to other sharpening procedures. Therefore, you must keep some safety tips in mind while using a lawn mower blade sharpener. Here are a few safety tips for you!

  • Go through the user’s manual and understand the working principles of a blade sharpener.
  • Never use oil or lubricants on electric blade sharpeners.
  • Examine the machine always before using the blade sharpener each time.
  • Fully concentrate while sharpening otherwise you might get hurt if the knife slips.
  • Never touch the tool with bare hand if the switch is turned on.
  • Keep the blade angle intact for effective results.
  • Switch off the lawn mower and clean it once you are done with the sharpening process.

10 Best Lawn Mower Blade Sharpeners

*Below, you'll find our more detailed reviews, but you can also click the links above to see current prices or read customer reviews on Amazon.

best lawn mower blade sharpener

Via Amazon.com

If you are in search for the best lawn mower blade sharpener, then opt for the Work Sharp Knife & Tool Sharpener. It is best for both novices and professionals. The blade sharpener can sharpen all types of blades and knives. Also, the procedure of operating this tool is pretty simple. 

With the help of diamond belts, you can repair or sharpen ceramic belts too. The blade sharpener even comes with quality belts, which improve the tool’s flexibility. Thus, it turns out to be a versatile product. As there are medium, coarse, and fine belts comprised, the blade sharpener fulfills different tasks faster. You can employ its granular belt to repair damaged blades. On the other hand, its medium belt works best for sharpening generalized knives, whereas its slender belt is meant for honing and sharpening serration or offering touch-ups to blades.

Finally, the tool’s precision guides are something to notice. They refer to some of the best features of Work Sharp knife and tool sharpener. This is so because they offer results, which are repeated, fast, and consistent.


  • Comes with a 1-year warranty
  • Features adjustable handles
  • Unique and flexible abrasive belts
  • Ideally sized and highly versatile
  • Smooth operation


  • Consumes a lot of time
  • Not best for heavy operation
best lawn mower blade sharpener

Via Amazon.com

There are diverse kinds of garden tools present out there. If you want the best lawn mower blade sharpener, then SHARPAL all-in-one lawn mower blade sharpener is what you need. One can use this versatile tool for various purposes and along with various tools. Using this product, the task of sharpening blades seems like an easy and convenient task.

With the help of SHARPAL sharpener, users do not have to buy any additional tool sharpener for other garden tools. The tungsten carbide sharpener is helpful for edge setting on dull double-beveled equipment. The flat tungsten carbide works great for single-beveled edges. In addition, it even comes with a ceramic rod, using which you can polish various kinds of blades.

At the tool’s back, you will find a large sharpener. Using this wide-angle sharpener, you can sharp thick blades easily. There is even a tungsten carbide pre-set for sharpening pruners and shears.


  • Comes with a 3-year warranty
  • Features a safety hand guard
  • Multi-tasking and versatile tool
  • Highly efficient, durable and flexible
  • Offers great performance


  • Follow instructions carefully
best lawn mower blade sharpener

Via Amazon.com

Corona AC8300 Sharpening Tool is perfect for all types of blades for equipment in the garden, lawn, construction, or landscape agriculture. It is a super carbide file that measure about 5 inches. The solid carbide employed in this design is a high-quality durable item, which guarantees its long-lasting life.

The blade sharpener features a great functionality, where it is very comfortable for holding. It is very simple to use due to the non-slip rubber grip. Plus, it prevents the blade from slipping and ensures that you remain secure when sharpening. However, it is recommended to practice the angling for the tool edge. It will prevent unproductive strokes.

This blade sharpener from Corona is perfect for people who seek portability. This is so because the blade sharpener features a convenient and small size, which you can easily fit in your pocket or tool bag.


  • Perfect for all types of blades
  • Pocket-sized and lightweight blade sharpener
  • Features a comfortable, non-slip grip
  • Unique design and highly durable


  • Takes lots of time while sharpening lawn mower blades
best lawn mower blade sharpener

Via Amazon.com

Lawn mower blades require to be sharpened occasionally. The best lawn mower blade sharpener is Magna-Matic MAG-9000 blade sharpener, which is made in the USA.  This product has been there on the market for some time now. It even has an incredible reputation. The sharpening blade will definitely offer a professional cut.

The sharpener’s design is really simple to use and makes the sharpening process a quick one. The amazing thing about this blade sharpener is that this tool can sharpen blades within just 60 seconds. Also, the blade sharpener can sharpen any blade size. In addition to this, this sharpener features a high-speed voltage functioning. This will help you in saving on the electricity bills. Along with its unique design, this sharpener is pretty durable and reliable that takes care of both flat and straight blades. Plus, you can easily carry it around as this portable tool is designed in such a way.

Magna-Matic MAG-9000 Blade Sharpener is a commercial lawn mower blade sharpener. It sharpens tools at a 30-degree angle. It is great for both left-handed and right-handed blades.


  • Sharpens blades within 60 seconds
  • Very simple to use      
  • Highly durable and reliable due to quality built
  • Fast sharpening


  • A bit pricey
best lawn mower blade sharpener

Via Amazon.com

Dremel A679-02 Sharpening Kit is designed for sharpening blunt lawn mower blades effortlessly. It can even be used to sharpen other outdoor tools. It is extremely affordable as compared to other blade sharpeners. You can use this portable electric kit for a massive range of gardening tools. These tools include lawn mowers and chainsaws.

Dremel sharping kit features a precision guide, which can help you in restoring sharp edges on tools that you are working with. People who own a rotary tool can screw this Dremel product onto that tool, where it would be the housing cap. The sharpening kit from Dremel comes with various attachments that makes it compatible with lots of tools, such as cordless options.

Along with a user’s manual, this sharpening kit includes lawn mower sharpening attachment, garden tool attachment, four sharpening stones, a wrench, gauge, and insertions. The four sharpening stones are 932, 455, 454, and 453. Therefore, this sharpening kit is a multi-purpose product that gardeners can use for maintaining all the outdoor tools by keeping them efficient and sharp.


  • Compatible with both corded and battery-powered tools
  • Comes at an attractive price
  • Very simple to use
  • Portable and small


  • Not recommended for heavy usage
best lawn mower blade sharpeners

Via Amazon.com

This blade balancer comes from Oregon who is a well-known leader in guide bars, chain saw, forestry accessories, and sprockets. Oregon is a unit of Blount International and is a leading supplier and manufacturer of lawn mower blades as well as other outdoor tools’ parts.

Oregon lawn mower blade balancer is manufactured with premium quality zinc die-casting. If you use this tool for sharpening blades on a frequent basis, then it offers a smoother, finer cut to the lawn mower blade. The blade balancer reduces wear and tear of the engine and prevents vibrations. It makes sure that you get an even sharpening of the blade for extending the machine life.

Oregon blade balancer offers accurate blade balancing for increasing the mower life and reducing vibrations. It works best on circular blade patterns. However, it accommodates all kinds of mower blade holes and enables for a precise and quick balancing. Place this balancer on a leveled surface and then, keep the blade onto it. For starting the balancing process, use the cone. After keeping it in place, the blade will either fall or stay horizontal depending on the distribution of the material.

Once you have identified which portion is heavier, slightly grind your blade and examine it on the balancer. Keep on repeating the process until the blade gets balanced. After getting the precision you require, you can continue to work efficiently.


  • Comes at an exciting price
  • Adjusts to all blade hole sizes
  • Balances for lesser vibration
  • Sturdy base for allowing secure balancing
  • Enhances blade longevity and performance


  • Takes time to practice how to use this blade balancer
best lawn mower blade sharpeners

Via Amazon.com

AccuSharp GardenSharp Tool is a very useful equipment. This blade sharpener sharpens blades having a single edge on scythes, shears, lawn mowers, or others. For carrying out this function, the blade sharpener constitutes a diamond-honed tungsten carbide blade. This material does not require oil to function.

The most interesting thing about this AccuSharp blade sharpener is that one can wash this tool in dishwashers. Also, its finger guard helps in protecting your fingers or hands from cuts. The GardenSharp tool is designed for sharpening all single-edged or difficult to sharpen tools in the tool shed. This range of tools include lawn mower blades, limb loppers, scythes, shovels, pruning shears, and hoes.

One can sharp all these things to a razor edge easily and quickly using this sharpening blade. The reversible diamond-honed tungsten carbide blade brings back the cutting edge to the new condition. AccuSharp blade sharpener does not rust, where you can clean this blade with water and soap. To make things easier, just wash it in a dishwasher.


  • Manufactured in the USA
  • Features a diamond-honed tungsten carbide blade
  • Comes at a reasonable rate
  • Perfect for all kinds of gardening equipment


  • One cannot exert pressure for sharpening blades due to its small size and plastic-built
  • Requires stiffer plastic or better arrangement of more screws.
best lawn mower blade sharpeners

Via Amazon.com

If you are looking for a pretty cheap blade sharpener, then Arnold BSK-1 lawn mower blade sharpener is what you need. It is so convenient to use this blade sharpener. Using this grinding wheel, you can sharpen the lawn mower blade easily while it remains there on the lawn mower.

The best thing about this blade sharpener is that it works on both cordless or corded drill. The sharpener features a preset angle, which aligns with the lawn mower blade for grinding a new face. As the sharpener is pretty cheap, it arrives with certain limitations. Here, it becomes difficult to keep an even angle correctly.

Meanwhile, this blade sharpener from Arnold is not a good idea for badly damaged blades. However, it is not a bad idea to try this product due to its attractive price tag. So, you are surely going to like this mower blade sharpener for the fact that you can sharpen the blades without removing it from the lawn mower. So, now hurry up and get this blade.


  • Very simple to operate
  • No need to remove blades for sharpening using this tool
  • Cheaper lawn mower blade sharpener


  • Not ideal for badly damaged blades
best lawn mower blade sharpeners

Via Amazon.com

This multi-purpose sharpener can bring all your dull blades and knives back to the original state in a few minutes. Remarkably, this blade sharpener features a dual grit area. Its coarse grit area comes handy when you need to reshape the edge of the blade, whereas the medium grit helps to add final touch-ups.

People can use any sharpening oil or lubricants for honing the tools quickly using the puck. You need to hold the tool tightly while begin to hone the tool. After that, keep the puck on the tool’s edge and start to move it in a circular motion while rotating the puck all over the entire blade. You need to repeat the entire procedure for the other side of your lawn mower blade.

Lansky Lawn and Garden Multi-Purpose Sharpener is perfect for hatches, axes, machetes, shovels, and all types of lawn mower blades. Moreover, this stone features a tapered edge for more convenience.


  • Cost-effective
  • Simple design and multi-purpose
  • Portable and handy
  • Sharpen all types of garden tools rapidly


  • Gives uneven finishing on tools
best lawn mower blade sharpeners

Via Amazon.com

All-American mower blade sharpener is another great option for sharpening both standard and mulching blades. It is a cost-effective option available on the market. This blade sharpener holds the blade easily and securely so that you have a great experience in a shorter period of time possible. Also, you can sharpen your blades while enjoying the security of fingers hassle-free.

The mower blade sharpener is highly portable, which makes it easier for carrying around. It is also flexible. The sharpener even comes with a cordless grinder. It is pretty lightweight and features an M8 by 1.25 adapter pin. This adapter pin is responsible for combining various grinders to the main assembly. This blade sharpener just takes a few minutes to sharp several blades.


  • Durable and simple to use
  • Perfect for all blade sizes
  • Compatible with both mulching and standard blades
  • Comes with an adapter pin
  • Sharpens multiple blades simultaneously


  • Not to use with hot water

Buying Guide for the Best Lawn Mower Blade Sharpener

It is not an easy task to select the best lawn mower blade sharpener even for users who own a small lawn mower. Here, you have to consider several factors and follow some guidelines before buying a lawn mower blade sharpener.

best lawn mower blade sharpener

Just figure out what features are the most crucial to you:

Kinds of Lawn Mower Blades

As you know, there are various kinds of sharpening items present out there. Before you step out to buy a sharpener, you must know about the different kinds of lawn mower blades available. So, let’s have a look at the different kinds of blades.

Usually, there are two kinds of lawn mower blades as per the degree of effectiveness and efficiency you need.


It is a long-lasting sharpening blade, which comes in 2-in-1 designs. This blade is the most well-known kind of a lawn mower blade sharpener. It provides the accurate range of airflow. Plus, it offers clean cutting along with the grass clippings’ faster discharge.


It is another kind of blade sharpener. This multipurpose blade comes in three-in-one designs. It is great for effective and efficient mulching of grass clippings. This blade sharpener is usually used for riding lawn mowers.

Design and Quality

Before you purchase a blade sharpener, it is necessary to make sure that its quality is great. Also, it is not necessary that expensive sharpeners will have a premium quality. Check out the eminence of a product by reading its reviews online before making the final decision.


Blade sharpeners are used for increasing the efficiency of the blade and sharpening the edges of the blade. Its main role is to enhance the blade life. So, it becomes necessary that the blade sharpener you use must be long-lasting and durable. Thus, choose a blade that will last for some years.

Ease of Use

The sharpener’s usability rests upon whether user is left- or right-handed. It is also vital to consider how comfortable will be your sharpener when using. If it is not at all comfortable, then there’s no point in buying it. A good blade sharpener reduces the range of effort users require and make them less tired too.


Definitely, the sharpening process needs to be a safe and comfortable operation. However, a sharpener should refine the blades’ edges in a minimum time possible. The speed matters here as if a sharpener runs faster, it could overheat the blade and harm you. At the same time, highly accelerated blade could fall off.

Mounting System & Grinding Wheel

The mounting system features the T-slot design. This system assists to mount the mower blades safely. Also, it takes extra care that a sharpening tool could adjust with the mower blades easily.

Additionally, you have to consider the grinding wheel. Make sure this wheel doesn’t burn the mower blades. Plus, there needs to be a significant range of the tempered glass.

Quick Change & Vision Guards

Change guards help in removing the grinding wheel faster and also, in the burr removal. Also in several cases, it is even useful for increasing the sharpening process. On the other hand, vision guards help you in protecting your eyes from materials released while you sharpen your blade like metal clippings, etc. This guard is essential to keep eyes protected.

Sharpening Ports

If you want to arrange continuous sharpening angles such as 20 degrees, 25 degrees, 30 degrees, 35 degrees or so, it is essential to think about the sharpening ports’ role.

Power Cables

Power cables are the power source, using which you can sharpen the mower blades. Thus, it is vital to switch off the power source and other tools related to a power cable. Plus, also keep a check of when you require to change the spark plug.

Frequently Asked Questions Regarding Best Lawn Mower Blade Sharpener

Q1: At what angle do you need to use a blade sharpener?

A: After a while, mower blades become dull and may require sharpening. When you sharpen, the filing requires to be finished at the similar angle as per the original angle. Thus, the performance does not get affected. The sharpener’s bottom surface must not be sharpened because it can modify the complete sharpening angle. When you sharpen the blade, the upper surface requires to be filed only. The angle normally should be around 40-45 degrees. However, the best angle is 30 degrees. It keeps the blade more effectively and efficiently.

Q2: What else can a lawn mower blade sharpener sharpen?

A: You can use a lawn mower blade sharpener for sharpening a massive variety of tools, which include various kinds of knives, axes, and saws. To know what your blade sharpener can do, it is better to refer to the user’s manual.

Q3: When you should sharpen your lawn mower blade?

A: The answer to this question depends on just how frequently you use the mower blades. If you use the lawn mower at just home, then you have to sharpen the blades just one time in a year. In case, you use your mower more often, then you need to sharpen the blades more frequently. It even applies to the people who belong to the mowing business.

Meanwhile, the best time for sharpening the mower blade is while you begin noticing a decrease in performance. You should replace the blade immediately if it is damaged.

Q4: Is it possible to sharpen mower blades using the power drill?

A: Sure. One can even sharpen the blade using a sharpening stone and a power drill. Start the drill and run it on your dull blade. However, there’s no particular period on how often you need to sharpen blades. It is fine to file the mower blades every 3-4 weeks for maintaining the sharpness. It will also decrease the cases of the mower blade becoming dull.

Q5: How much tight your mower blades should be?

A: Once you have accurately tightened the mower blades, it is necessary to make sure that the blades are reinstalled back adequately into the lawn mower. Be careful as this process could lead to injuries or accidents if not taken care. So, the mower blades’ tightness plays a vital role. The blades have to be kept between 70 ft. and 90 ft. pounds of torque for riding lawn mowers. For walk-behind mowers, it should be between 38 ft. and 50 ft. pounds of torque.

Q6: How much sharp your mower blades need to be?

A: The mower blades require to be violently sharp, but they should not be razor-sharp at the same time. You have to touch the blade without getting injured or being cut. Furthermore, a mower blade having razor-sharp edges will not cut the grass effectively. This is so because it may roll over and cause the blades from being chipped. The sharper your blade is, the earlier it would become dull. Hence, it decreases the blade life ultimately.


Work Sharpener is the best product available out there. It is the choice of the editor for a reason. If it’s not what you want, then Sharpal blade sharpener is an incredible choice. Check out other mowers too as all constitute some of the best products out there. So, which is the best lawn mower blade sharpener according to you? Tell us in the comment section below and ask your queries too. We would try to get back to you really soon!

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