How to Sharpen a Circular Saw Blade with a Dremel

How to Sharpen a Circular Saw Blade with a Dremel

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Over time, the blade on your circular saw will become duller. Anybody who has tried to shave with an old razor blade can tell you exactly what effect this can have.

The blade struggles to cut through objects that it would have previously sliced through with ease.

It may even end up mangling the thing that you’re trying to cut. Most people manually sharpen their circular saw blades using a file. It’s a long and tiring process. But did you know that it’s possible to use a Dremel instead? Here we’re going to take a closer look at what a Dremel is and how to sharpen a circular saw blade with a Dremel.


What is a Dremel



What is a Dremel?

A Dremel is essentially a multi-tool, which means that you can use it for a variety of purposes. It includes a handheld base, onto which you can attach a variety of different accessories to the head.


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When you switch the Dremel on, the head rotates. This rotates whatever accessory that you’ve attached to the head. As a result, you can use a Dremel to cut through wood, glass, and metal. However, there are also accessories that allow you to handle more delicate jobs that involve working with electronics and plastics.

It’s all about getting the right head for the job.

Most people use their Dremels for small repair jobs around the home. Its shape also makes it ideal for working with small materials, such as those you may use in crafts projects.

A Dremel is an extremely versatile tool that should find its way into your toolbox. It also has an alternate use as a blade sharpener, assuming you know how to use it.


Using Your Dremel to Sharpen a Circular Saw

Using Your Dremel to Sharpen a Circular Saw

So, now you’re wondering how to sharpen a circular saw blade with a Dremel.

Here are the steps.

Step 1

Find a square slab of wood and attach a cylinder to the center of it. This cylinder should have the same diameter as the hole in the center of your circular saw blade.

Step 2

Add a strip of wood to the underside of your slab. This should be thick enough to secure the slab in place for the next step.

Step 3

Take another slab of wood and chisel a strip running all of the way down it. This strip must be large enough to fit the strip on the bottom of the slab with the cylinder.

The aim here is to create a mechanism that holds that slab with the cylinder in place while you’re using your Dremel to sharpen the blades. You may also be able to use a vice, secured to the strip of wood underneath the slab, for the same purpose.


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Step 4

You can now slide the saw blade down the cylinder until it rests upon the slab. Make sure that the blade tips hang over the edges of the slab, or else you won’t be able to reach them.

Step 5

Attach a small circular cutting head to your Dremel. Now, secure the Dremel at a 90-degree angle to the saw blade, on the left-hand side

Step 6

Set the circular saw blade so that the longer outer curve of each tooth will run against the Dremel. Mark the tooth that’s closest to the Dremel. This prevents you from double sharpening.

Step 7

Activate the Dremel so that it runs while secured in place. Now, hold the edges of your circular saw blade and lightly brush the outer edge of the marked tooth against the running Dremel. You only need to do this for a second or two.

Step 8

Move the saw blade back and rotate to the next tooth. Repeat the process. Do this until you’ve gone all the way around the blade and have returned to the marked tooth.

Step 9

Flip the Dremel so that it’s on the right-hand side. Remove your saw blade from the cylinder and flip it around. Repeat steps 7 and 8, thus sharpening both sides of the blade’s teeth.

Step 10

Turn the Dremel so that the circular part of your cutting head directly faces the tips of your circular saw’s teeth.

Step 11

Press the tip of each tooth against the Dremel blade for a couple of seconds each to sharpen the tips as well as the curves.


This technique isn’t easy to set up. You have to find ways to secure your circular saw blade in place, as well as the Dremel.

However, once you’ve built or found a suitable mechanism, it takes a matter of seconds to sharpen each tooth of the circular saw’s blade. This is a job that often takes several minutes when doing it manually with a file.

As always, take the proper safety precautions before attempting this. Do not use this technique if you can’t keep both the Dremel and circular saw blade secure. Wear goggles and keep your fingers away from the Dremel blade while it’s in use.


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