How To Sharpen A Circular Saw Blade? | Easy Tips To Save You Money & Your Saw

Behind every successful circular saw and completed project; is a strong circular saw blade.

Keeping your circular saw maintained and well-kept for effective use is one thing, however, it’s also important to know how to sharpen a circular saw blade.

Why would you need to know this? Well, a sharp circular saw blade will allow you to complete your projects smoothly, and every cut made will be quality.

Want to read the entire article, but don’t have enough time on your hands? We’ve created a quick overview for you, in the list below:

  • To sharpen a circular saw blade, you’ll need a file, clamp, marker – and of course, the blade!
  • Four smooth strokes back and forth will get your blade’s teeth sharp with ease
  • All teeth, no matter the direction or material use, can be bevelled
  • Sharpening a circular saw blade is a cheaper and more efficient alternative than replacing the blade
How To Sharpen A Circular Saw Blade

What You Need: Preparing The Blade

Preparation is key when it comes to sharpening your circular saw blade. Without proper preparation, you won’t have the proper technique or the tools in order to get the job done.

So, what exactly do you need in order to sharpen your blade? Don’t worry, we’ve got you covered.

What You’ll Need:

  • Circular Saw Blade
  • File
  • Table Clamps
  • Wrench (for older circular saw models)
  • Tape or a marker

Preparing The Blade

Now that you have theorems required to sharpen your blade, it’s time to get to work. Firstly, if you haven’t already – the blade will need to be removed from your circular saw. 

Your circular saw will either require you to use a wrench to loosen the blade, (in older models) or will have a switch to easily release the blade, which is often found in new models.

To finish the preparation process, you’ll need to clamp the blade in a position that has the teeth pointing directly towards you, in a vertical position.

The blade must be tightened to a comfortable tension, as too loose with have the blade unable to be clamped, and too tight will have the blade bending it even breaking. 

When sharpening the tip of the circular saw blade, you’ll also need to take into consideration the direction the teeth are pointing.

If the teeth point towards the same direction, you will be able to complete the filing in one attempt – however blades with teeth that do not follow a single direction can take two or multiple passes in order to sharpen them successfully.

These are the first steps to make when sharpening a circular saw blade.

Aligning The Teeth

Aligning the teeth is one of the most important parts of the process when you’re looking to sharpen your circular saw’s blade. 

Firstly, you’ll need to mark the starting tooth – which you can do with a simple black marker or even a piece of tape. 

Why would you be marking the teeth? Well, the marker will indicate a complete rotation of the blade, giving you a clearer idea of when to start and finish. 

Filing The Blade

Now you’ve reached the most fun part of sharpening a circular saw blade – filing. This is where you’ll need to grab your file and begin work. We’ve made this easier for you to follow, by our numbered list below:

  1. Your file will need to be held flush against the tooth
  2. Make four smooth strokes, backwards and forwards along the plane of the tooth. Make sure you keep an eye on the sharpness of the teeth when doing so. If the tooth is sharp, you can move onto the next tooth
  3. Continue onto the next tooth, continuing the same backwards and forwards motion, with the same amount of strokes used on each tooth – until they’re sharp.
  4. Release the blade’s tension every third or fourth tooth and rotate this around, making sure you’ve kept an eye on the tooth you have originally marked.
  5. After sharpening the circular saw blades, you can move onto the next set of teeth.
  6. Place your circular saw blade back into the circular saw when not in use

Of course, this list, there are some variables you can face when sharpening circular saw blades, as all blades are not made the same. What happens when you come across teeth that are bevelled?

When sharpening a circular saw blade that is bevelled, make smooth strokes as you normally would on a blade with all the teeth facing the same direction, make sure to skip every second or third tooth to remain consistent.

The Final Say

Now you’ve read the entire article, there should be no reason as to why your blades are still dull.

A sharp blade is imperative when it comes to cutting, and by following this guide you’ll find that dull blades are no longer a concern of yours.

I’d love to hear your thoughts, however. Is there a technique you use, or perhaps something I missed? Let me know in the comments below.

Frequently Asked Questions

How often should I sharpen a circular saw blade?

There’s no one-hat-fits-all answer to this question, as it will depend on the amount of work you do, the materials you cut – and also the circular saw you’re using. If you find the blade becoming more sluggish upon your cuts, and the teeth dull – it’s time to sharpen your blade.

What are the benefits of sharpening my blade as opposed to buying a replacement?

For starters, circular saw blades can be expensive if you’re constantly replacing them, especially if you’re using it daily, cutting heavy materials such as masonry, or thick pieces of wood. This is one of the most benefits sharpening a circular blade has.

James Thomas

James Thomas

Tool Enthusiast

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