What Is The Best Way To Change Blades On a Circular Saw?

A circular saw is an essential tool for any woodworking or construction project, and it’s important to know how to change the blades properly. Whether you need to switch out a dull blade or switch to a different type of blade for a specific task, it’s important to follow the right steps to ensure safety and efficiency.

In this article, we will guide you konw how to change a circular saw blade, including the tools you will need and some safety tips.


Tools you will need:

New circular saw blade

Wrench or Allen key

Safety glasses


Dust mask

Workbench or other sturdy surface

Clamps (optional)


How to change a circular saw blade

Part 1. Removing a Circular Saw Blade

  1. Unplug the saw’s cord or battery.If your saw is corded, unplug it from the power source. If it’s cordless, remove the battery. This will prevent any accidental startup while you’re changing the blade.

  1. Set the blade to the highest position.Raise the saw’s blade to its highest position by adjusting the depth of cut. This will give you more room to access the blade nut.

  1. Press and hold down on the saw’s spindle-lock button.The spindle-lock button is usually located on top of the saw’s motor housing, and it prevents the blade from spinning when you’re removing or installing it. Hold down the button firmly to lock the blade in place.

  1. Unscrew the spindle nut and washer with a wrench.Locate the blade nut and washer on the saw’s blade arbor, and use the wrench to turn the nut counterclockwise. Be careful not to lose the washer, as you’ll need it when you install the new blade.

  1. Push the blade guard up to remove the old blade.After you’ve removed the nut and washer, gently pull the old blade out of the saw’s blade housing. If the blade guard is in the way, push it up to release the blade.

Part 2. Installing a New Saw Blade

  1. Clean the inside of the saw’s blade guard. Take a few minutes to clean the inside of the blade guard with a cloth or a brush. This will remove any sawdust or debris that might have accumulated in the housing.


  1. Remove the knockout from the blade if the saw spindle is diamond-shaped. Some circular saws have a diamond-shaped spindle that requires you to remove a knockout from the center of the blade before installation. Use a screwdriver to tap the knockout out of the blade’s center hole, and discard it.

  1. Set the new blade onto the saw’s spindle.Carefully slide the new blade onto the saw’s arbor, making sure that the blade teeth are facing in the right direction. Most saw blades have an arrow indicating the direction of rotation, so align the arrow with the saw’s blade rotation direction.

  1. Hold down the spindle-lock button. Once the new blade is in place, hold down the spindle-lock button again to prevent the blade from rotating.

  1. Use your wrench to turn the blade nut clockwise until it’s hand-tight, then use the wrench to give it an extra quarter-turn to ensure that it’s secure. Don’t over-tighten the nut, as this could damage the blade or the saw.


Tips for Changing Circular Saw Blades:

  • Use clamps to hold the saw in place while changing the blade.
  • Always wear safety glasses, gloves, and a dust mask to protect yourself from debris.
  • Make sure the saw is turned off and unplugged before you start working on it.
  • Use the right size blade for the task at hand.
  • Always check the blade’salignment before and after installing a new blade.
  • Tighten the blade bolt as much as possible without over-tightening.
  • Test the saw after changing the blade to ensure that it is working properly.



Changing the blades on a circular saw is a simple task that can be completed in a few steps. It is important to follow the proper safety procedures and use the right tools to avoid injury. Always make sure that the saw is turned off and unplugged before starting, and wear the appropriate safety gear. Choosing the right saw blade for the task at hand and checking its alignment before and after installation can help to ensure accuracy and safety. By following these steps, you can change the blades on your circular saw with ease and confidence.


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