[Top 5] Best Grit For Sharpening Lawn Mower Blades with Buyer’s Reviews

Hello,

Sharpening the blade process improves the overall appearance of the lawn and helps prevent damage to the mower. Hence, it prolongs the life of the machine. 

But choosing the right grinding wheel for blade sharpening can be a challenge. Accordingly, different types of grinding wheels have different levels of wear and are more suitable for certain types of blades. 

In this article, I will explore the best grit for sharpening lawn mower blades. Specifically, I’ll dive into the benefits and drawbacks of using each product. Then I make recommendations based on my research and analysis. 

By the end of this article, you’ll better understand which is best for your mower blade. Thanks to this, you can achieve a manicured lawn. 

So let’s dive into this article!

Best Grit For Sharpening Lawn Mower Blades Reviews

A suitable grinding wheel for sharpening your mower blade is essential for maintaining a healthy and attractive lawn. Keep scrolling to discover my picks!

Product Image
Benchmark Abrasives 4.5" x 7/8" Premium High Density Jumbo Zirconia Type 29 Flap Discs 4 1/2 for Angle Grinder, Sanding Discs, Finishing - Grinding Wheels 4 1/2 Inch (10 Pack) - 60 Grit
NEIKO 11143A 10 Pack Zirconia Flap Discs 4-1/2 for Angle Grinder, 60 Grit Flapper Wheel, Angled T29 Grinding Wheel 4.5 Inch Flap Disc, 7/8" Arbor Grinding Disc, Flap Wheel for Wood & Metal Sanding
DEWALT Grinding Wheel, General Purpose for Metal, 4-1/2-Inch x 1/4-Inch x 5/8-Inch (DW4523)
BHA Metal and Stainless Steel Cut Off Wheels for Die Grinders, 4” x 1/16” x 3/8” - 25 Pack
Oregon Economy Lawn Mower Blade Sharpener & Grinder, Heavy Duty, 1/3 HP Motor, Adjustable (88-025)
Tiltle
Benchmark Abrasives Premium Flap Discs
NEIKO Premium Zirconia Flap Discs
DEWALT Grinding Wheel
BHA Cut Off Wheels
Oregon Economy Sharpener and Grinder
Editor's Rating
⭐4.9
⭐4.9
⭐4.8
⭐4.7
⭐4.7
Prime
Amazon Prime
Amazon Prime
Amazon Prime
Amazon Prime
Amazon Prime
Product Image
Benchmark Abrasives 4.5" x 7/8" Premium High Density Jumbo Zirconia Type 29 Flap Discs 4 1/2 for Angle Grinder, Sanding Discs, Finishing - Grinding Wheels 4 1/2 Inch (10 Pack) - 60 Grit
Tiltle
Benchmark Abrasives Premium Flap Discs
Editor's Rating
⭐4.9
Prime
Amazon Prime
Product Image
NEIKO 11143A 10 Pack Zirconia Flap Discs 4-1/2 for Angle Grinder, 60 Grit Flapper Wheel, Angled T29 Grinding Wheel 4.5 Inch Flap Disc, 7/8" Arbor Grinding Disc, Flap Wheel for Wood & Metal Sanding
Tiltle
NEIKO Premium Zirconia Flap Discs
Editor's Rating
⭐4.9
Prime
Amazon Prime
Product Image
DEWALT Grinding Wheel, General Purpose for Metal, 4-1/2-Inch x 1/4-Inch x 5/8-Inch (DW4523)
Tiltle
DEWALT Grinding Wheel
Editor's Rating
⭐4.8
Prime
Amazon Prime
Product Image
BHA Metal and Stainless Steel Cut Off Wheels for Die Grinders, 4” x 1/16” x 3/8” - 25 Pack
Tiltle
BHA Cut Off Wheels
Editor's Rating
⭐4.7
Prime
Amazon Prime
Product Image
Oregon Economy Lawn Mower Blade Sharpener & Grinder, Heavy Duty, 1/3 HP Motor, Adjustable (88-025)
Tiltle
Oregon Economy Sharpener and Grinder
Editor's Rating
⭐4.7
Prime
Amazon Prime

#1. Benchmark Abrasives Premium Flap Discs – Best Overall

Benchmark Abrasives Premium Flap Discs

 “Sharpening mower blades with these discs is easy

 Specifications

  • Brand: Benchmark Abrasives
  • Material: Aluminum Oxide, Zirconia
  • Diameter: 4.5 Inches
  • Grit Number: 60

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Product Reviews

My first impression of these discs is that they seem much better and more durable than other expensive discs I’ve used. 

I would put them on par with the Wolverine disc I used from the local welder supply store. They cost three times more.

Efficiency

First, I find the versatility of these discs to be unparalleled. I can see why they are for use with angle grinders ranging in size from 4-1/2″ to 5″.

Second, the uniform particle size and premium blend of ingredients make a difference in their performance. 

In the past, I have used other disks that are inefficient and fast to fail. But these Benchmark Abrasives discs work well and last a long time.

Third, the T29 cap design is ideal for aggressive material removal and surface mixing. They have become an essential tool in my workshop. So I don’t think I will switch to any other brand soon.

Besides using these discs on my lawn mower, I use them to sand an old blade and groove floor that has two coats of paint that are decades old. 

While sanding wood with these discs is messy, they provide much better results than using a belt sander or random orbital sander.

In addition, these discs are well worth the price. Besides, I appreciate that the manufacturer pays attention to customer satisfaction. I feel confident that I am receiving a high-quality product.

In short, I could work much faster with these discs and get much better results overall.

Convenience

Sharpening mower blades with these discs is easy. Specifically, they attach easily to angle grinders. They can then quickly remove any dullness or nicks. 

Hence, you have blades that are sharp and ready to cut. This process is straightforward and can be done by experts and DIY enthusiasts.

Pros

  • Flexible
  • Durable
  • High-quality materials
  • Ideal for many surfaces
  • Fit angle grinders from 4.5 inches to 5 inches

Cons

  • The sanding process using the discs can be messy.

#2. NEIKO Zirconia Flap Discs – Best for Efficiency

NEIKO 11143A 10 Pack Zirconia Flap Discs

 “The discs performed an outstanding job of cleaning the metal plate and sharpening the dull blades.”

 Specifications

  • Brand: Neiko
  • Material: Zirconia Alumina
  • Diameter: 4.5 Inches
  • Grit Number: 60

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Product Reviews

I am satisfied with the results, and this product delivers. The discs did an excellent cleaning metal plate and sharpening dull blades job on my lawn mower. They allowed me to complete the task much faster than expected.

Efficiency

I chose the 60-grit option. It worked well for cleaning rust on metal plates. Also, it sharpens dull blades.

One aspect of Benchmark Abrasives Premium Discs that I appreciate is their quality. According to the manufacturer, these angled-lidded discs have industrial-grade zirconia abrasives. 

Thus, they ensure durability and extend the life of the disc. Besides, I noticed that they withstand high temperatures and pressure. So they are ideal for sharpening hard-to-sharpen materials other than mower blades.

Regarding specs, each disc is 4.5 inches in diameter with a shaft size of 7/8 inches. Thanks to that, I can use my 13,000 RPM angle grinder.

Besides, I use them to sharpen machetes, axes, and other items that require sharp blades. And they give me surprisingly good results. I find it a benefit because I don’t have to buy separate discs for each tool.

But the discs can wear out relatively quickly, depending on the intensity of my use.

Convenience

Regarding ease of use, these cover discs are easy to install and remove from my angle grinder. The 7/8″ shafts come in standard sizes. So they fit snugly and securely onto the grinder spindle.

Besides, changing discs is quick and easy. I used a wrench to loosen the nut holding the previous disc in place. Next, I could slide the NEIKO Zirconia Flap Discs onto the correct spindle.

In addition, I can switch from job to job with minimal downtime. Besides, these discs are to fit many angle grinders. So it is easy for me to change them as needed.

Besides, they get into tight spaces and hard-to-reach areas. It allows for a more natural wrist angle when sanding. Also, when using these discs, they produce minimal vibration. So I am comfortable using it for a long time.

I also appreciate that they come in packs of 10. So I always have a few on hand when needed.

Pros

  • High efficiency
  • Optimal design
  • Durable
  • Affordable price
  • Fit most angle grinder models

Cons

  • Wear down more quickly than some others.

#3. DEWALT Grinding Wheel – Best for High-Quality Material

DEWALT Grinding Wheel

 “With the great benefits of durability, I am certain that I will be able to use it for a long time.”

 Specifications

  • Brand: DEWALT
  • Material: Aluminum Oxide
  • Diameter: 4.5 Inches
  • Grit Number: 60

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Product Reviews

I highly recommend this product for its quality. With the outstanding advantages of durability, I am satisfied that I can use it for a long time. Find out my experience with this product!

Efficiency

An outstanding feature of this grinding wheel is the high-performance aluminum oxide grain. It gives the grinding wheel a long life and allows for the removal of a wide range of materials. Hence, it doesn’t take long to sharpen my mower blades.

Also, I pay attention to the high grain concentration of the grinding disc. It allows active grinding. 

In addition, I was surprised that the wheels ran while I sharpened them quite hard. This feature can handle and operate the grinder more easily.

Besides the high-performance nut, our proprietary blend of materials ensures a durable, long-lasting wheel. I have used this product many times and am impressed with its longevity. To date, the wheel shows no signs of wear and tear.

Convenience

This wheel has 3-full fiberglass panels. This part adds durability and makes me feel more secure when using it. Accordingly, the fiberglass panels absorb vibrations during operation. 

So I don’t worry about the wheel breaking. As someone who values safety, this feature gives me more peace of mind when using the sharpening stone.

In addition, the 4.5-inch wheel is compatible with most angle grinders on the market. Hence, I don’t need to go out and buy a specialized grinder to sharpen my mower blades.

I noticed that the DEWALT Grinding Wheel for sharpening blades has a standard size for angle grinders, like the NEIKO product mentioned earlier. I appreciate this feature because I can use it with my angle grinder without problems. 

Besides, I have not encountered any slipping or losing wheels during use. It is a testament to its safe suitability. Hence, I feel confident and secure during use.

Pros

  • Durable material
  • High grain concentration
  • Fit most angle grinders
  • Do not slip or loosen during use

Cons

  • Wheels may leave visible scratches or marks on the surface.

#4. BHA Cut-Off Wheel – Best for Compatibility

BHA Metal and Stainless Steel Cut Off Wheels

 “The BHA Cut Off Wheel has amazed me. I recently sharpened my mower blades.”

 Specifications

  • Brand: BHA
  • Material: Aluminum Oxide
  • Diameter: 4 Inches
  • Grit Number: 60

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Product Reviews

I am impressed with the BHA Cut Off Wheel I recently used to sharpen my mower blades. Let’s find out why I love this product!

Efficiency

BHA cutting wheels are highly efficient and built for cutting action. I can use them to sharpen my stainless steel blade. 

Besides, the wheels can handle the most challenging jobs with ease. Hence, sharpening my mower blades became easy. I could cut clean and sharp on my equipment with no problems.

But there are a few downsides to these clipped wheels. Firstly, I found them to be quite noisy during use. I find this problem a bit annoying. They generate a lot of dust. So I recommend you wear masks and eye protection when using them.

In short, they are very versatile and can cut through many materials. So they are perfect for many types of jobs. Also, their thickness ensures a long service life. This feature is critical to anyone who regularly uses these wheels.

Convenience

In terms of convenience, these removable cutting wheels fit my angle grinder perfectly. The package of 25 high-end metal cutting discs is very convenient. 

Hence, I don’t have to worry about running out of disks early. Also, each disc has a diameter and thickness to match my mower blade.

What sets these cut-off wheels apart is their compatibility with different tools. Specifically, I’ve used them with die grinders, gas mowers, and power tools. 

As a result, they work very well. I appreciate the versatility these split-cut wheels offer. Thanks to it, I can use them with many tools, depending on my needs.

Besides, I find them designed to last a long time. The thickness of the wheel ensures extended service life and increased durability.

So I won’t have to replace them as often as other cutting discs. This feature is essential to me because I use these wheels often.

Pros

  • Durable
  • High-performance
  • Good value for the price
  • Compatible with a variety of tools

Cons

  • Do not work well on thicker materials.

#5. Oregon Economy Sharpener – Best for Heavy Duties

Oregon Economy Lawn Mower Blade Sharpener and Grinder

 “It’s fascinating to me. It’s simple to use. It works perfectly and save my time”

 Specifications

  • Brand: Oregon
  • Power Source: Manual
  • Weight: 41.4 pounds
  • Horsepower: 0.33 hp

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Product Reviews

I have a Black+Decker BEMW472BH, and sharp blades are vital to my lawn mowing. The bench grinder does not maintain the factory chamfer. 

So I started looking at blade grinders. And this product seemed to be the best option within my budget.

Efficiency

First, the Oregon Economy Sharpener has a quiet motor with a relatively low sound. It doesn’t vibrate much at all, and it starts smoothly. 

Second, the blade grinder features an 8-inch hard grinding wheel with 36 grit that removes metal quickly and at the right angle.

I find the motor bogged down if too much pressure is applied to the blade. But when the pressure is kept steady, it works perfectly fine and does the job quickly. 

It only took me 1-2 minutes to sharpen my first blade. Then I can sharpen four more blades before the end of the night. Also, I’ve tried to do this task on the thicker commercial ones with no problems.

I am pleased with my purchase and have recommended it to some of my lawn care business friends. They also find this to be the best choice for their work. 

But the mulch blade adapter may not work with all blade types. Thus, keep that in mind before you buy.

Convenience

It only took me a minute or two to get the hang of this product when I received it. So I think anyone will find the process of using it simple.

One thing that I love about this grinder is that it can sharpen any blade length. It is unlike others limited to a 6-inch or 5-inch grinding depth.

Besides, it has simple height adjustments with the handle and the adjustment knob. Also, the reverse switch allows both left and right blade sharpening. I find this feature to stand out from other brands. 

Thus, it helps me do the task with left- and right-handed blades without causing hand or arm fatigue. The machine also has a rubber base to help reduce vibrations during use and keep the machine stable.

Yet, this blade grinder is heavy. So it is challenging to move around, but I found it is only a minor problem because the machine is designed to be stationary.

Also, it is relatively expensive compared to other options. But the quality of this machine is worth the price. This investment will pay off in the long run by delivering high-quality, efficient blade sharpening.

Pros

  • Powerful motor
  • Fast and smooth grinding
  • For both left and right-handed people
  • Simple adjustment
  • Less vibration and quiet

Cons

  • High price

How To Find The Best Grit For Sharpening Lawn Mower Blades?

Buying Guide

With so many grit options available, it can be challenging to choose. But with this guide, you can find the best tool. Specifically, I will discuss the following factors:

  • Specifications
  • Blade condition
  • Blade material
  • Sharpening method
  • Blade size and shape
  • The durability of grinding tools
  • Personal preference

Get started now!

Specifications of Sharpening Tools

Lawn mower blade sharpening

One specification to consider is the speed of the sharpening tool. Some tools, such as bench grinders, have a high pace that can quickly remove material from your blade. 

In this case, you need coarser grinding to avoid overheating and damaging your equipment. Other tools (sharpening stones or files) are slower and may require finer grain for smoother, more precise grinding.

So, consider the shape and size of the sharpening tool. Some tools may be more suitable for sharpening certain types of blades or for reaching certain areas of your equipment. 

Thus, you may need an abrasive compatible with the tool’s shape and size for optimal results. Also, I recommend looking at the compatibility of the grit with the sharpener. Some grinding wheels may not be compatible with certain types of sharpening tools, such as diamond-on-stone sharpeners.

Read more: 2 Blade Vs. 4 Blade Lawn Mower – Which Should You Choose?

Brand

Sharpening a lawn mower blade by women

In my experience, the brand can affect the quality and efficiency of the sharpener. Specifically, a well-known and reputable brand can provide high-quality grinding tools. 

In particular, they have products that are suitable for mower blades. They can have high-quality materials and features that help sharpen their blades more efficiently. Alternatively, a reputable brand may offer a warranty or guarantee.

I recommend reading reviews and researching the brand of what grit wheel for sharpening mower blades. This process can provide valuable insight into the tool’s reliability. Plus, you’ll know in advance of potential problems or downsides.

Blade Condition

Blade Condition

You need to consider the condition of the blade. I recommend using a coarse grinding wheel (80 or 120) if it is too blunt. The goal is to remove the damaged metal and create a new edge. 

After removing the nicks and chips, you can use a finer grinding wheel. I recommend 220 or 320. They can help you refine the edge and create a sharper cut surface.

Remember to use a suitable sharpening stone. Using a too-coarse wheel can remove too much metal and reduce the lifespan. 

Meanwhile, a grindstone that’s too fine may not produce a sharp enough edge and can lead to jagged cuts in your lawn.

Blade Material

Also consider blade material

Considering blade material is essential in ensuring the blade is properly sharpened and ready to mow your lawn. Each material has unique properties.

The most common materials used for mower blades are steel and titanium. Steel blades are more affordable than titanium blades. But they may need to be sharpened more often. 

Meanwhile, titanium blades are more durable. But remember that they need a different approach when it comes to sharpening.

When sharpening a steel blade, I recommend a medium grindstone, like 220 or 320 (usually sufficient). Also, you should only use a coarse emery stone like 80 or 120 if the blade has nicks or chips. 

On the other hand, fine grit stones (600 or 800) can also be suitable for fine-tuning the edge and creating a sharper-cut surface.

For titanium blades, you should use a fine grinding stone. Titanium blades are stiffer than steel blades. Hence, coarse grinding wheels can cause micro-cracks that weaken your equipment. Meanwhile, a fine grindstone will produce a sharper edge without damaging the blade.

Sharpening Method

Sharpening Lawn Mower Blade Method

Various sharpening methods are available. Each method has its unique properties. The most common grinding methods for mower blades are:

  • Using a sharpening stone: The hand tool sharpens manually by running back and forth over the stone
  • Using a bench grinder: A stationary tool uses a rotating grinding wheel.

A medium grit, like 220 or 320, is usually sufficient for steel blades when using a sharpening stone. You should only use coarse grit with a crack or splinter. 

Meanwhile, fine grit can refine the edge and create a sharper cut surface. When sharpening a titanium blade with a stone, a fine grinding stone can avoid small cracks that could weaken your tool.

On the other hand, when using a bench grinder, a coarse grinding wheel such as 36 or 60 can be used. The purpose is to remove nicks or chips and create a new edge. Yet, touch lightly when using the sharpener to avoid removing too much metal.

Besides the sharpening method, use the correct technique when sharpening mower blades. The blade must be securely held in the work clamp or clamp. Also, you must keep the stone or grinder at the proper angle.

Blade Size And Shape

Size And Shape of Blade

The blade’s size refers to its overall length and width. Longer blades may require more sharpening with the sharpener. With this in mind, you can even sharpen the entire equipment. 

Smaller blades may need finer grinding to ensure that they are not over-sharpened. Thanks to that, they don’t lose their edge too quickly.

Besides, the shape of the blade affects the sharpening process. Blades with a curved shape (on rotary mowers) may need a different approach than straight-shaped blades (on roll mowers). 

In particular, curved blades may require finer grinding. The goal is to ensure the edge is sharpened evenly along the curve. Meanwhile, straight blades may require coarser grinding to remove nicks or chips.

The durability of sharpening tools

Lawn mower blade sharpening tools

An unstable sharpening stone will quickly wear out and become less effective at sharpening the blade. 

This problem can lead to uneven edges or blades that quickly lose their sharpness after use. Also, it can lead to the need for more frequent grinding. Hence, you will spend time and money on maintenance.

Meanwhile, a durable tool will maintain its sharpness over time. Thus, it gives a clean, consistent edge on the blade.

Personal Preference

Personal preference plays a role in choosing the best type of sharpener. I must note that what works for you may not work for another. 

So it is essential to consider personal preference when choosing the best sharpening stone for mower blades.

Some people prefer a finer grind for a sharper, cleaner cut. Meanwhile, others prefer coarser grinding for a more durable edge. They can withstand harsh cutting conditions.

On the other hand, some people are willing to spend a lot of money on well-known brands. Meanwhile, others may want a more affordable option. Thus, remember to try different options.

Read more: What Is The Best Way To Clean A Lawn Mower? Helpful Tips For Gardeners

FAQs

Can Mower Blades Be Too Sharp?

Yes. The blade may tear the grass rather than cut it cleanly if it is too sharp. Hence, this can result in a ragged, uneven appearance. 

Also, it can make the lawn more susceptible to disease and pests. Besides, too sharp blades can be dangerous to handle. They can cause serious cuts and injuries.

What Angle Should You Sharpen Lawn Mower Blades?

It is 30 degrees. It’s essential to maintain the original angle of the blade to ensure optimal performance and prevent damage. Some blade sharpeners may have built-in guides to help achieve the correct angle.

Do Lawn Mower Blades Need To Be Sharpened?

Yes, they do. Dull blades can tear the grass rather than cut it cleanly. So they will be uneven and potentially cause stress on the lawn. Also, sharpening can help prolong the mower’s lifespan by reducing wear and tear on the engine.

How Sharp Should The Edge Of A Mower Blade Be?

The edge of a mower blade should be sharp enough to cut the grass cleanly without tearing or damaging the blades. But it should not be too sharp. This condition can cause damage to the lawn and potentially be dangerous to handle.

Conclusion

Above is a list of the best grit for sharpening lawn mower blades in 2023. I’ve picked these to help you choose the best grindstone for your needs.

I also recommend Benchmark Abrasives Premium Discs. It is the best product for the price on this list.

Hence, you can ensure that your mower blades are always in optimal condition. So invest in the right sharpening tools! 

Thank you for reading!

5/5 - (2 votes)