When And How You Should Change Your Circular Saw Blade

how to change a circular saw blade

Last updated on August 27th, 2020 at 06:12 am

Dull blades are a pain in the behind. If your circular saw blade is dull or damaged in any way, then it’s time for you to change it for a new one.

You need to do this because, whatever type of saw you’re using, whether it’s a circular saw, a compound miter saw or even a table saw, your saw is only as good as its blade.

With a bad or dull blade, you’ll find it very difficult to use your saw. Working with it will become hard and painstaking, even though other parts of the saw are as good as new.

Related: The 10 Best Circular Saws Of 2020 Reviewed

When should you change your circular saw blade?

There’re several reasons why you might need to change your circular saw blade.

The first one is when the blade is dull. If your circular saw blade is dull, it will become difficult to cut through the wood or material you’re cutting.

The side of the blade will start to burn through the wood instead of cut through it easily. When you notice this, then you know you need a new circular saw blade.

how to change a circular saw blade

Another reason why you might want to change your circular saw blade is when you’re working on different materials and you’re using different blades.

Circular saws can be used to cut different types of materials. You just have to change the blade to the specific blade that matches that material.

A blade meant for cutting wood will not be good for cutting granite.

So, if you don’t have two different circular saws for the two materials, then you have to switch the blades each time you want to cut another material.

To avoid that though, you can just buy different circular saws with blades for the different materials you work with.

Additionally, even if you’re not cutting different materials, you might also need to change blades depending on the type of cut you want to make.

There are different blades for rough cuts, finish cuts, cross cuts and even rip cuts. So, if you have only one circular saw, then will have to change the blades depending on the type of cut you’re trying to make.

How to change your circular saw blade

Step 1: Unplug the power cord or remove the battery

unplugged circular saw

This is a very important step for obvious reasons. You don’t want the circular saw accidentally starting when you have your hands there trying to swap the blades.

Do this before any other thing. If you have a corded circular saw, unplug it from the power outlet. If you have a cordless circular saw, remove the batteries.

This is very important. Don’t skip this step.

Related: 5 Best Skilsaw Circular Saws For Professional Woodworkers

Step 2: Make sure you have the right replacement blade

circular saw blades

A 10 inche blade circular saw needs a 10 inche blade and a 7-1/4 inche blade circular saw should have a 7-1/4 inche blade.

Don’t try to be smart and try to fix a 10 inche blade into a 7-1/4 inche circular saw or vise versa. Use the appropriate type of circular saw blade.

Step 3: Secure the blade guard and arbor

Every circular saw comes with a blade guard that covers the blade. You need to place your saw on a solid surface and pull back the blade guard to expose the blade.

Next, engage the arbor lock if your circular saw came with one. If yours don’t have an arbor lock, press the circular saw blade against a wooden surface to secure it in place.

Step 3: Loosen the arbor nut from it

The next step is to loosen the arbor nut using the wrench that came with your circular saw. On a direct drive circular saw, you need to rotate the wrench in a counterclockwise direction to loosen the nut and rotate clockwise for a worm drive circular saw.

Slide the blade out once you’ve loosened the nut.

Related: The Best Plunge-Cut Saws For Long Rip Cuts

Step 4: Replace the worn out blade with your new blade

Once the old dull blade is off, you can slide in the new blade into the arbor, slut in the nut and tighten it. Take note not to over tighten the arbor nut, as the nut tends to tighten even further as you cut with the saw.

So, there’s little risk of under tightening the nut. Just tighten it firmly, and you’ve successfully replaced your circular saw blade.

Step 5: Test the circular saw

Once the new blade is in place, replace the battery or plug the cord into your power outlet and give it a test run to make sure everything is secure and running properly.


Depending on the type, quality or brand of circular saw you’re using, there may be a slight difference on how you change your own particular circular saw.

But in general, the process remains the same. Also make sure to consult the manual that comes with your circular saw for the exact steps to change your circular saw blade.

If you’re have any further doubts, you can also consult the manufacturer to provide you with more instructions on how you can change or replace your circular saw blades.

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