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How To Sharpen A Circular Saw Blade? | 5 Easy Steps

Having a sharp circular saw blade is important. A sharp blade helps get the job done efficiently while putting less stress on your saw. Saw blades can be very expensive so sharpening them yourself can help you save some money while extending your blade’s lifespan.

Most home improvement stores sell blade sharpeners but if you’re on a budget that may be out of your price range. In this article, I’m going to explain the step by step process of how to properly sharpen your circular saw blade.

This is what you will need to get complete the job.

  • A table clamp or a vice grip
  • A black sharpie
  • A diamond file

5 Easy Steps To sharpen A Circular Saw Blade Properly

Step-1: Removing The Saw Blade

You can’t sharpen the blade while it’s still attached to the circular saw. It makes sharpening the blade much more difficult. It also increases the risk of an accident. So the first step is simple. We have to remove the blade from your saw. Safety should always be your top priority. Accidents can happen whether you’re a novice or an expert carpenter so make sure you unplug your saw.

Newer model saws have a blade release switch which makes this step much easier but if you have an older model saw it will require a wrench to loosen the arbor nuts.

Step-2: Secure The Blade

Now that the blade has been removed from the saw it’s time to move on to the next step. For this step, you will need to set up your table clamp or vice grip. It doesn’t matter which one you use. Once your clamp is set up, you will place the blade inside of the clamp, securing it from moving while you sharpen it.

Keep in mind you don’t want to over-tighten the clamp down on the blade or it could possibly bend the blade rendering it useless. You will want the blade facing up with the teeth towards you.

Step-3: Marking The Blade

After you have secured the blade in your clamp it’s time to mark it with your sharpie marker. You will want to mark the top point of the blade also known as the teeth. Afterward, remove the blade from your clamp and flip it over. Repeat the same process again marking the top tooth of the blade.

You’re marking the blade so you know when you have sharpened it full circle. It prevents double sharpening. The bevels are on every other tooth. That is why you have to flip the blade and make a second mark otherwise your technically only sharpening half of the blade. After you have marked the blade it is time to move on to the most important step.

Step-4: Filing The Teeth

So you’ve removed your blade from your saw, secured it in your clamp, and marked the teeth on both sides. Now it’s time for the most important step, sharpening the blade. Obviously for this step you are going to need your diamond file.

A normal file will work but I recommend a diamond file because it will make this much easier for you. You want to apply the same amount of strokes and pressure to each tooth so that they are all sharpened the same. This ensures that the blade will cut straight. Any inconsistencies may impair the way the blade cuts through wood.

Start with the first tooth that you marked. Remember to pay attention to the bevels. They are on every other tooth of the blade. Now take your file and run it back and forth on the plane of the tooth once.

If the tooth appears to be sharp then you can move on to the next tooth. Continue to repeat this process. You will have to loosen your clamp to spin the blade to get to the other teeth. Do this until you reach the mark you started at.

Once you have finished you will remove your blade from the clamp and flip it over. Repeat this process on the other side of the blade until you are finished.

Step-5: Installing The Blade

Now that you are finished sharpening your blade you can now begin to install it back in your circular saw. Remove the blade from the clamp. Be careful when removing it because now you have freshly sharpened teeth. If you forgot how you removed the blade then all you need to remember is that the teeth face in the direction the saw cuts.

Most circular saw blades have an arrow that shows the direction of rotation. Blades are meant to pull the wood towards the saw. Make sure the blade is installed correctly and securely then you’re finished.

Final Verdict

So if you followed these five steps correctly you should have a renewed circular saw blade. Learning how to sharpen a saw blade is a handy skill that can also help you save a little bit of money.

Like I had mentioned before there are electric saw blade sharpeners but they can range anywhere from $50-$500. So until you can afford one at least you know how to do it on your own.

Enjoy using your newly acquired skill and remember safety comes first.

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James R. Robertson
James R. Robertson

James R. Robertson is an expert advisor in all types of saws. His hobby is using different types of saw tools and has over 8 years of experience. Based on his experience with different types of saws, he is sharing his opinion about various saws. So that a beginner can get started right away. Happy reading!

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1 thought on “How To Sharpen A Circular Saw Blade? | 5 Easy Steps”

  1. Circular Saw’s work capability depends on its blade sharpness. If it’s blade sharpness is bad its service is show low performance. Thanks for you to given this guideline.


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