How to Change Blade on DeWalt Circular Saw: A Step-by-Step Guide

Changing the blade on a DeWalt circular saw is a necessary skill for any woodworker, carpenter, or DIY enthusiast. Knowing how to properly and safely replace your saw blade can not only extend the life of your saw but also ensure that your cuts are clean and precise. As with any tool, maintenance is crucial, and that includes replacing worn or damaged blades to keep the saw in top working order.

A hand holding a Dewalt circular saw. The blade being removed and replaced with a new one using the provided wrench

A circular saw is a powerful tool, and thus, safety is paramount when performing any kind of maintenance. Prior to changing the blade, it’s essential to ensure that the saw is turned off and unplugged. This eliminates the risk of accidental starts while you are handling the blade. Selecting the right blade for the job is just as important, and this depends on the material you plan to cut and the type of cut you need to make.

Key Takeaways

  • Replacing a saw blade is key to maintaining a circular saw’s performance.
  • Safety measures are critical when handling sharp blades and power tools.
  • Choosing an appropriate blade affects the quality of the cut.

Safety Precautions

When changing the blade on a Dewalt circular saw, the safety of the user is paramount. I ensure that all necessary safety precautions are taken to prevent accidents and injuries.

Prepare Work Area

Before I begin, I make sure to prepare my work area. This means verifying that the surface on which I’m working is stable and clear of any debris that could cause the saw to shift or tip. I check that the saw is unplugged or the battery is removed, effectively preventing the tool from activating accidentally.

Wear Safety Gear

I always wear safety goggles to protect my eyes from particles that might fly up while changing the blade. If there’s a lot of dust, I’ll also wear a dust mask to avoid inhalation of fine particles. It’s critical to use the appropriate safety gear to minimize the risk of injury.

Identifying the Right Blade

When choosing a blade for my DeWalt circular saw, it’s crucial that I match the blade to the type of material I’ll be cutting and ensure that it fits the saw perfectly.

Blade Types

The two primary types of blades I consider are crosscut blades and combination blades. Crosscut blades are designed with more teeth to give a smooth finish when cutting across the grain of the wood. In contrast, combination blades are a versatile option, featuring a tooth count that balances between ripping and crosscutting capabilities. I make sure to pick the type that suits my project’s needs.

Size and Compatibility

To determine the correct size, I measure the blade diameter that my DeWalt saw can accommodate. Most importantly, the chosen blade must match the arbor size of the saw for a proper fit. Blade depth is another factor I pay attention to; this refers to how deep the blade cuts into the material. Getting the right blade depth is essential for efficient cutting and the longevity of my saw. It’s important not to forget that my choice must be compatible with the specific model of the DeWalt circular saw I’m using to ensure safety and optimal performance.

Removing the Old Blade

Before I begin removing the old blade from my DeWalt circular saw, I always ensure that the saw is not connected to any power source and that it’s completely safe to handle. The key tools for this procedure are the blade wrench and an understanding of how to properly engage the spindle-lock button.

Power and Safety

I start by confirming the power supply is disconnected; this ensures there’s no risk of the saw accidentally starting while I’m working on it. Safety is paramount, so I check the power cord is unplanned from the mains, and if it’s a cordless model, I remove the battery entirely. I wear protective gloves to prevent any cuts from the old blade’s teeth.

Loosen the Bolt

Next, I locate the spindle-lock button on my saw. I press and hold this button to prevent the blade from rotating. While keeping the spindle-lock button engaged, I use the blade wrench that came with my saw to loosen the bolt that holds the blade in place. On my DeWalt saw, this is usually done by turning the wrench counterclockwise. If the arbor nut is tight, I apply firm, steady pressure with the wrench until it loosens. With the nut and bolt loosened, I can now lift the blade guard and carefully rotate the blade until it’s free from the saw. I make sure to keep the lever or guard well out of the way to avoid snapping it back into place inadvertently.

Installing the New Blade

When I change the blade on my DeWalt circular saw, I make sure to carefully align the new blade and perform the necessary checks before use. This ensures safety and accuracy in my cuts.

Align and Secure

First, I take the new blade and ensure that its arrows are pointing in the direction of the saw’s rotation. This is crucial for proper blade function. I place the blade on the arbor, carefully fitting it over the arbor’s flanges. The side with the label should face outwards to be visible when the saw is in use. I then replace the washer and the arbor nut, hand-tightening them to secure the blade in place. It’s vital to keep the blade steady while I tighten the arbor nut with the wrench provided with my saw or according to the manual.

Final Checks

Before I complete the blade-changing process, I double-check that the new blade is firmly secured against the inner arbor flange, and there is no wobbling or misalignment. The nut and bolt should be snug, but not overly tight as this could damage the saw. Lastly, I ensure the saw’s shoe is not in contact with the blade and adjust if necessary. These precautions ensure the blade will operate correctly and safely during use.

Operation Tips and Maintenance

In this section, I’ll guide you through the essentials for effective use and regular maintenance of your DeWalt circular saw to ensure precise cuts, longevity, and safety.

Effective Use

When operating a circular saw, precise cuts depend greatly on the following:

  • Saw Blade: Always ensure my saw blade is appropriate for the material I’m cutting. For instance, when working with plywood, a blade with more teeth will produce a smoother cut.
  • Bevel Angle: I adjust the bevel angle accurately for any bevel cuts, making sure the adjustments are tight to avoid any movement during the cut.
  • Clamps: I use clamps to secure the material firmly, which not only prevents kickback but also helps in achieving straighter cuts.
  • Sawdust Management: I keep the saw’s path clear of sawdust to maintain visibility and accuracy. Sawdust can also be a safety hazard if not managed properly.

Regular Maintenance

To keep my circular saw functioning effectively and for a longer period, I adhere to these maintenance practices:

  • Blade Inspection: Regularly check and change a circular saw blade as needed. A dull blade can cause strain on the motor and may produce a kickback.
  • Motor: I keep an eye on the motor for signs of wear or overheating. The motor’s ventilation should be clear of obstruction to prevent overheating.
  • Cleaning: After each use, I clean the saw to remove any accumulated sawdust, which can compromise both the saw’s performance and safety.
  • Storage: Storing the circular saw in a cool, dry place ensures no unwanted moisture can cause rust or other damage.

By adhering to these guidelines for effective use and regular maintenance, a DIY enthusiast like myself can ensure that circular saws remain in top running condition and safe for every project.


Changing the blade on a DeWalt circular saw is a straightforward process when the correct steps are followed. Initially, I make sure the saw is disconnected from any power source to prevent accidental startup. It’s essential to use a stable platform to lay the saw down while swapping out the blade.

Safety is paramount, so wearing gloves to protect my hands from the sharp edges of the blade is part of my routine. I locate the blade locking mechanism—often referred to as the arbor lock—and press it to prevent the blade from moving. Using the wrench provided with the saw or an appropriate tool, I loosen the bolt securing the blade.

Once removed, I line up the new blade with the arbor, ensuring the teeth are facing the right direction for cutting. The bolt is then securely tightened, and the blade guard is repositioned. Before resuming the use of the saw, I double-check all components to make sure everything is properly secured.

By following these steps with attention and care, I find that the blade change is not only efficient but also maintains the high performance expected of DeWalt tools. It is advisable to refer to specific model instructions for minor variances, such as blade size and type. For additional guidance, I often consult How To Change Blade On Dewalt Circular Saw or watch informative tutorials like DeWalt Circular Saw Blade Change to ensure I am adhering to the best practices.

Frequently Asked Questions

In my experience, changing the blade on DeWalt circular saws is straightforward if you follow the proper steps. Here, I’ll address some common queries and provide specific instructions to ensure a safe and successful replacement.

What steps are needed to replace the saw blade on a cordless DeWalt circular saw?

To replace the blade on a cordless DeWalt circular saw, I ensure the saw is switched off and the battery is removed. Then, I press the spindle lock to secure the blade, unscrew the bolt with the provided wrench, and carefully replace the blade, reversing the process to secure the new blade in place.

What is the procedure to install a new blade on the DeWalt DCS570 Circular Saw?

When installing a new blade on the DeWalt DCS570, I make sure to disconnect the saw from any power source. I then retract the blade guard, use the wrench to loosen the blade screw, align the new blade with the rotation markers, and fasten it securely with the screw.

How can I remove the blade from a DeWalt circular saw using the removal tool?

I utilize the removal tool that comes with the circular saw to remove the blade. By locking the blade in place with the blade lock mechanism, I turn the removal tool to loosen the arbor nut and remove the blade.

Can you change the blade on a DeWalt circular saw without using any tools, and if so, how?

Some models may allow tool-free blade changes where I simply activate the spindle lock mechanism, rotate the blade by hand to loosen it and replace it with a new one. It’s important to always check the user manual to confirm if this option is available for your specific model.

What safety precautions should be taken while changing the blade on a DeWalt reciprocating saw?

When switching out the blade on a DeWalt reciprocating saw, I always disconnect the saw from power, wear protective gloves, and ensure the blade is cool to the touch. I carefully handle sharp edges and keep the trigger lock engaged to prevent accidental activation.

What process should I follow to change the blade on a DeWalt 4 1/2 inch circular saw?

For the smaller DeWalt 4 1/2 inch circular saw, I follow a similar procedure to larger models: make sure the saw is powered off and the battery is detached, press the spindle lock, remove the flange with the provided wrench, and switch out the blade. I always double-check tightness and proper placement before restoring power.

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