In some cases, it is necessary to replace the blade of your circular saw. Here is a short tutorial with all the steps on how to change a circular saw blade.
Most of this will depend on the specific circular saw you have on hand, but this article will go through a few steps to show you how to replace a circular saw blade in general terms but also for two specific types of circular saws:
- Ryobi Circular Saw.
- Craftsman Circular Saw
When to change a circular saw blade?
When your circular saw blade begins to wear out, you must replace or sharpen it to ensure optimum cutting power. You will quickly realize this when the cut takes longer than usual. Also, according to certain types of materials, it is sometimes necessary to use a specific blade.
Reasons for changing a circular saw blade:
- the saw blade has become blunt
- the circular saw blade is damaged
- the saw blade has become rusty
- another material is to be sawed with the saw
- for jigsaws: straight cuts are not made, but curved cuts (or vice versa)
How to Change a Circular Saw Blade
Step 1. Unplug the saw power cord or remove the battery
Disconnect the power supply if using a standard circular saw or remove the battery if using a cordless.
Obviously, this is a very important step because you do not want to accidentally pull the circular saw blade while you are handling it during the change!
Important note: Make sure to use the blade size for which the circular saw is designed!
Step 2. Remove the blade guard of the circular saw
Place the circular saw on a safe surface and remove the blade guard so that the blade is exposed. If your circular saw has a safety lock, engage it.
The shaft is the axis on which the blade is located, and locking it will keep the nut stable when you loosen it to release the blade.
If you don’t have an safety lock, you must push the blade into a wooden surface to keep it stable for the next step.
Step 3. Slide the worn blade
Insert your wrench on the arbor nut, then turn it in the same direction as the blade turns.
This will be counterclockwise for a direct drive saw, or clockwise for a worm saw.
Once the arbor nut is unscrewed, you can slide the blade.
Step 4. Put the new circular saw blade
Take your new blade and slide it onto the shaft, just the opposite of how you removed the previous blade.
Replace the nut and tighten it with your wrench.
Make sure not to over tighten and also keep in mind that the nut tends to tighten even more when cutting, so the risk of loosening is quite low.
So just tighten it well, and you’re ready to cut.
Step 5. Test the circular saw
Replace the battery or reconnect the power outlet, and then test it.
Make sure there are no excessive vibrations and that everything seems secure and ready to start cutting.
How to remove the blade from a circular saw?
To properly remove the blade, you must do to the following sequence:
- For your own safety, be sure to disconnect the electrical cord from the network or remove the battery
- For easier replacement, install the tool on a flat, hard surface. To start unscrewing the bolt, it is necessary to press on the locking spindle, which blocks the rotation of the disk when unscrewing
- Unscrew the bolt using the special wrench provided Pull out the bolt and remove the pressure washer holding the saw blade.
- Move lower guide lever to raise protection
- Remove the sawing circle
Which side should the blade be on a circular saw?
When changing the circular saw blade, it is of course also important to pay attention to the later and correct running direction of the blade. If this is not obvious from the saw blade itself through markings, this is usually also in the saw’s operating instructions.
With a hand-held circular saw, the saw blade is normally clamped in such a way that it runs counterclockwise and the teeth only hit the workpiece from below.
The direction in which you open and close the screw depends on whether it is a right-hand or left-hand thread.
A normal thread is usually a right-hand thread. With circular saw blades, however, you are often dealing with a left-hand thread. This can be opened the other way around.
A good rule of thumb is: “As I run, I go up”
If the saw blade runs to the left, the nut or Allen screw should also open to the left.
As a rule, the operating instructions should be able to provide information about this. Alternatives would be to look up on the Internet (at the manufacturer) or to have the blade changed in specialist shops (but usually only works with hand-held circular saws ).
I have wrote another helpful guide on how to change a jigsaw blade. Click here to read it.
How to Change the Blade on a Craftsman Circular Saw
Craftsman circular saws are portable power tools powered by either a battery or cord. The circular saws have a replaceable lathe blade with several sharp teeth that rotates quickly to cut materials such as wood and plastic.
As the circular saw is used, the material cut by the saw will slowly break the blade down, causing it to look dull. As the blade dulls, it becomes more difficult to cut materials and the blade will draw more power from it.
Many types of blades can be sharpened when dull, however, unless you sharpen the blade yourself, the cost of sharpening the blade will often outweigh the cost of purchasing a new one.
Steps to change the blade of a craftsman circular saw:
- Turn off the saw and disconnect the power cable from the wall, or remove the battery.
- Place the saw on the side of your work table so that the guard is raised and the blade rests next to the table.
- Press the “Spindle Lock” button, located on the top of the saw to hold the blade in place.
- Insert the blade wrench into the center bolt on the blade, then turn clockwise to loosen.
- Remove the bolt and outer washer, then slide the blade out of the spindle and through the blade slot at the bottom of the saw.
- Place the new blade on the spindle, then secure the outer washer and bolt using the blade wrench.
Tips and Warnings
- On most Craftsman saws, the blade key is stored on the saw itself.
- If you don’t have the blade key, it can often be replaced with a hex key or adjustable wrench, depending on the model of the saw.
- Remember to unlock the blade after you have replaced it.
How to Change the Blade on a Ryobi Circular Saw
Ryobi manufactures many types of power tools, outdoor products and paint supplies. The Ryobi line of circular saws are designed to make precision cuts in a variety of surfaces, including wood and PVC.
The saw blade contains several teeth that rotate quickly to slide through the material to be cut. After regular use, the material begins to tarnish the blade, making it more difficult to make cuts.
When signs of tarnishing, such as difficulty making cuts, stronger cuts and burn marks on the side of the wood, are identified, change the blade of your circular saw.
Steps to change the blade of a Ryobi circular saw:
- Unplug the saw power cord from the wall outlet or an extension cord.
- Press and hold the spindle lock button to prevent the blade from moving. The spindle lock button is located above the blade on the top of the middle of the saw.
- Loosen and remove the screw in the center of the blade with the saw blade while holding the spindle lock button.
- Remove the washer and the outer washer from the blade shaft.
- Lift the blade guard, then remove the blade.
- Wipe a drop of oil, included with the saw, on the inner flange ring, which is the part in contact with the center of the inside of the blade.
- Wipe a drop of oil on the outer washer of the blade, which is the washer in contact with the center of the outer part of the blade.
- Lift the lower blade guard, then place the blade on the spindle.
- Hold the spindle lock button once more, and replace the washer and the outer washer of the blade.
- Install the blade screw in the spindle, then tighten with the blade wrench.
Changing a circular saw blade is usually an easy process these days, as you can see from these simple steps. Whether you use a standard, mini circular saw or a cordless circular saw, the work remains the same.
Anyway, after you start to do the circular saw blade several times, you will know how to change a circular saw blade like a pro!
How do I know if my circular saw blade is blunt?
It’s easy to judge that a saw blade has become blunt.
If you have to use excessive force when sawing and press the circular saw into the workpiece to get a cut and there is no cut at all when sawing without pressure, the saw blade is too blunt.
What is a circular saw blade?
A saw blade for the circular saw is a round blade with teeth in different numbers (depending on the material) that you can clamp into the device. Due to the radial uses, it usually wears evenly.
These round saw blades can be used not only for table saws but also for other saws (cross-cut saws, circular hand saws, etc.) – provided the holder and sizes match.
How many teeth must a good circular saw blade have?
Circular saw blades with a number of teeth less than 25 are suitable for cutting wood very often, while those with a greater number of teeth are used for thin thicknesses.
The type of material to be cut also affects the number of teeth that the blade must have to ensure optimal results and a good finish of the cut.
Plastic and aluminum, for example, require blades with a high number of teeth, from 40 to 80 or even more depending on the specific cases.