Best Circular Blade Sharpeners – Professional Grade Tools (2021)

| Last Updated: March 31, 2021

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Circular saws are incredibly versatile, and pretty soon you may find yourself using them so much that your blades are becoming dull.

But lucky for you, there is a tool that can fix that!

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Read on to learn more about circular blade sharpeners and all they can do for you.

Comparison of the Best Circular Blade Sharpeners

  • 370W power, 2850 RPM running speed
  • Works with blade sizes 3.15"-27.5"/80 - 700 mm
  • Highly accurate and easy to operate
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  • ​​Best 120-volt Saw Blade Sharpener
  • ​9-amp motor
  • ​Die-cast aluminum
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  • ​Editor's Pick
  • 250-watt motor
  • Works up to 2850 RPM
View Latest Price →Read Customer Reviews
  • Best Handheld Saw Blade Sharpener
  • ​Diamond file sharpener
  • Great for maintaining other blades
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What to Look for When Buying a Circular Saw Sharpener

So how will you find the product option that is best for you? These machines are fairly straight-forward, but some of them may involve some safety considerations. Don't forget, proper safety including personal protective equipment (PPE) is important in all steps of a project, from planning to clean-up!

Don't forget to use ear and/or eye protection!

Hands need a break? Check out our article on chainsaw gloves! These top-quality choices are great for most rough tasks!

Noise Level

It kind of goes without saying that sharpening anything can be a pretty noisy task. However, some sharpeners are louder than other options.

You are going to want to find a sharpener that reduces that ear splitting shriek to something a little bit more manageable. While quieter machines do exist, we always recommend using some sort of ear and eye protection while operating any machinery when debris is present!

Vibration Level

Vibration level is related to noise, but it goes much further beyond that. The more your machine vibrates, the more likely you as the user are to slip up and potentially hurt yourself.

The safest machines are the ones that vibrate the least when you are operating them. If you find your machine vibrates more as it gets older, you may want to double-check your maintenance or invest in some gloves.

Ease of Use

Sharpening your own blades can be a daunting task! Take away some of your stress and find yourself a machine that is easy to operate and quick at sharpening your blades. 

Review of the Best Circular Saw Blade Sharpeners

Now that you have a sense of what to look for with these tools, let’s check out some actual products:

Best Overall:
Mophorn Circular Saw Blade Sharpener


  • Can be used to sharpen a variety of different tools beyond just circular saw blades, including chisels and drill bits
  • Has an ergonomic handle for increased comfort while operating
  • Recommended for use with saws having twelve to fifteen TPI
  • Mophorn provides good customer service
  • Durable, built to last


  • Some users report their products arrived without an included face shield
  • You will likely need to tighten the handle upon arrival

What Are People Saying?

People are loving the intentional design on this model. The handle is engineered for maximum ergonomics, so the product is incredibly easy to operate, even for long periods of time. If you need to sharpen a ton of blades at once, this model should be your go to!

What We Love About It

We appreciate the range of sharpening capabilities that this model provides. It is not just built for circular saw blades, but can branch beyond even blades in general to items such as drill bits.

Who’s This Perfect For?

If you are working with a specific set of circular saw blades, namely those with twelve to fifteen teeth per inch, this model is the best sharpener choice for you. It is incredibly efficient at working with blades in that TPI range.

Final Thoughts

This Mophorn sharpener is an excellent overall sharpener that will be able to handle anything you need sharpened, but works particularly well with a certain type of circular saw blade. Plus, you will be able to use it for long periods of time thanks to the ergonomic design, so you can bang out your sharpening all at once.  

Best 120 Volt Circular Blade Sharpener:
Universal Circular Saw Blade Sharpener


  • Motor block tilts twenty five degrees to both the left and to the right in order to adjust for different blade tooth configurations
  • Strikes a great balance between being durable enough to last and being lightweight enough to transport
  • Comes with both an emory wheel and a diamond wheel
  • Has a sturdy aluminum base
  • Easy to operate


  • Feels a little on the flimsy side
  • Angle setting is not accurate

What Are People Saying?

People love how sturdy this sharpener feels to operate. If you are looking for something that is built to last and allows for maximum user safety, you will not be able to find a better option than this model.

What We Love About It

We appreciated that this model included an additional cutting wheel. Most circular saw sharpeners come only with the standard diamond wheel, but this model included a emory wheel as well.

Who’s This Perfect For?

A lot of users report being thrilled about how easily this tool can adapt to sharpening blades with different tooth configurations. If you are the type of worker who uses circular saws to cut a ton of different materials, and as a result you have a lot of blades with a wide range of teeth per inch, you will want to work with this sharpener because it can handle them all.

Final Thoughts

This is a top notch model with some excellent features, including a motor block with the ability to tilt at different angles to sharpen a wide range of different blades. Plus, it is light enough to haul it along anywhere you go. These qualities combine to make this model a great choice for professional woodworkers and metalworkers.                  

Editor's Pick:
Techtongda Round Circular Saw Blade Sharpener


  • Versatile, can also be used to grind material such as plastic, wood, aluminum, and more
  • Easy to use and to adjust the cutting edge of the feed angle
  • Has an adjustable surround shaped pallet to hold the blade
  • Durable, will last for hundreds of saw blade sharpenings
  • Does not produce a ton of noise while using


  • Requires a pretty substantial amount of time to set it up
  • Slide tolerance is on the looser side

What Are People Saying?

One of the reasons we chose this option as a top option was the overwhelming response from users about how easy this product is to operate. The idea of sharpening your circular saw blades on your own can be intimidating for some people, but we promise that with this model, you will find the whole process straightforward and simple.

What We Love About It

We were extremely impressed at how quiet this is! For such an effective sharpener, you would think it would make a ridiculous amount of noise while it is getting to work, but it is surprisingly silent.  

Who’s This Perfect For?

As mentioned above, this sharpener is a great option for people who are new to the idea of sharpening their own blades. But beyond just that, the model will also work exceptionally well for those who do not want to spend a ton of money on a one trick pony: this sharpener will not just go to town on circular saw blades, but will also work well on a ton of other materials.

Final Thoughts

We were so impressed by this product’s lack of noise, its ease of use, and its versatility that we had to choose it as our number one pick. Whether you are new to sharpening blades, or looking for something to take your sharpening to the next level, you will not fail to be impressed by this model.                    

Best Handheld Circular Blade Sharpener:
Samurai Kanzawa Japanese Saw Diamond Sharpener


  • Versatile: users report also using it for deburring, and for sharpening drill bits, pole saws, and tree saws
  • Sharpener has diamonds on both sides of the blade
  • Works particularly well on heat treated blades
  • Smaller than many other models
  • Durable, will last for a long time


  • Screw to set the ratchet is difficult to access

What Are People Saying?

One of the craziest reviews we heard in regards to this product is that it is so effective that one user was even able to use it to smooth out their toenails after clipping them. You really cannot find a product that is more efficient (and safer) than that!  

What We Love About It

We appreciate the size of this sharpener. You might think that because it is smaller than some other models, it is less functional, but you would be dead wrong. In fact, the more compact size makes this product easier to maneuver than other models.

Who’s This Perfect For?

If you work a lot with circular saw blades that have been treated with heat, you will not be able to find a better model for sharpening those specific blades than this product option right here.

Final Thoughts

This sharpener stands out from the rest of the crowd because it can be used on a wide variety of different saw blades, not just those that are circular. In addition, it is a fantastic option for heat treated blades, which can be complicated to work with.

BestEquip Round Circular Saw Blade Grinder


  • Works well on a bunch of different types of circular saw blades
  • Grinds most blades quickly and efficiently
  • Does not vibrate while sharpening
  • Durable, will last for a long time
  • Wheel is diamond tipped


  • Does not provide the most precise angles for sharpening
  • Does not come with included usage instructions

What Are People Saying?

People are really stoked about the versatility of this model. It comes with multiple arbor adapter sizes for different kinds of sharpening blades, so you will be able to change out blades easily if you so choose.

What We Love About It

We were absolutely blown away when we saw the price listed for this model. How is it that something of such high quality can be offered at such a low price point? This sharpener is a steal of a deal and we recommend hopping on it as soon as possible.

Who’s This Perfect For?

If you are new to sharpening your own circular saw blades, this model is a great option for you. It is safer than many of the other brands – users report it does not jump when grinding, so if you are a little intimidated, this sharpener will help to put you at ease.

Final Thoughts

Trying to strike the right balance between a high quality option and one that will not destroy your budget? Look no farther! If you are looking for something versatile and something that has some more advanced safety features, you will find the sharpener of your dreams right here. 

When Would I Use a Blade Sharpener?

It can be difficult to justify spending extra money on a blade sharpener if you are not entirely sure what you can use it for. Here are the top uses for a circular saw blade sharpener:

Circular Saw Blades

Okay, we get it, this one is kind of obvious. But when you think about all the different things you use a circular saw for, and how expensive it can be to replace circular saw blades regularly, it makes sense to invest in a sharpener specifically for this tool.

Other Kinds of Saw Blades

The fun thing about circular saw blade sharpeners is that they do not really know the difference between blades from a circular saw and blades from other saws. So you can totally use your sharpener to hone blades from other saw models, such as pole saws.

Drill Bits

You can even branch out beyond blades themselves and use your circular saw blade sharpener to put an edge on other tools that may have lost their bite. One common use for this kind of sharpener is to work on drill bits.

How to Use a Circular Blade Sharpener

  1. Make sure your sharpener is securely mounted to a flat, stable surface.

  2. Choose the correct sharpening wheel – diamond for blades with carbide tips, emory for blades with steel tips. (If you need to change out the wheel, you will have to use a screwdriver to remove the blade guard and reattach it. You will also need a wrench in order to remove the existing wheel.)

  3. Clean the saw blade you want to sharpen. Soak it in laundry detergent and water for a half hour, then use a brush to scrub it. Spray it with rust preventive solution after drying it.

  4. Attach your blade to the sharpening arm.

  5. Set your sharpener to the appropriate degree scale.

  6. Lock the sharpening arm in place.

  7. Sharpen every other tooth the first round, then adjust the angle and sharpen the teeth you did not sharpen the first time around.

Check out the video below for a more in depth overview of this process!

Benefits of Investing in a Quality Circular Blade Sharpener

It can be tempting to go with the cheapest models for these machines, and not invest in quality. But that would be a huge mistake! Here’s why it is worth it to spend a little more:


The last thing you want to do is sink money into a tool that will not work well for you in the long term. Blades will always get dull – you want a sharpener that will be able to hone your blades for years and years to come.


Sharpening circular saw blades is certainly useful, but wouldn’t it be nice if your tool could do a lot more? Higher quality sharpeners often have the capability to hone a wide variety of different work tools, not just circular saw blades.

Ease of Setup

There is very little that is more annoying than a new, fun tool that arrives in the mail…and then takes hours and hours to put together. Do yourself a favor and choose a sharpener that is easy and quick to set up.


Circular blade sharpeners can quickly become one of the handiest tools you have in your workshop. With the wide range of sharpening capabilities these little beauties boast, you will find yourself having a solid return on your investment in no time. Make sure to go with one of our models reviewed above – we promise you will not be disappointed. 

People Also Ask

Sharpening your own blades can be fairly complicated. Here are some of the most frequently asked questions we get regarding this process:

Is it Worth Sharpening Circular Saw Blades?

You can always go get your blades professionally sharpened, but that process can be expensive. While investing in a circular saw blade sharpener definitely has a higher start up cost, in the end, you will be able to save a substantial amount of money by sharpening your own blades.

Do Diamond Blades Get Dull?

Unfortunately, even the sharpest and toughest substance in the world, diamonds, will eventually become dull. They can last for quite a while, but they will need some help at some point. Obsidian is usually the best material for sharpening up your diamond blades.