Why Your Miter Saw Blade is Coming Loose?

Why your miter saw blade is coming loose?

The reason your miter saw blade is coming loose is because of a damaged spring. A loose bolt or a worn plate is another reason your miter saw blade is coming loose.

Damaged spring

A spring holds the head of the miter saw in place. When you move the head down to make a cut, the spring pulls it back up. If the spring is damaged, it won’t be able to pull your miter saw back up, causing the blade to become loose, which could be dangerous.

To fix the tension spring, you must find the right replacement part and put it in place. You can follow our simple step-by-step guide below on how to replace it. You’ll be back up and running in no time.

Loos bolt

A loosened bolt is also one of the main reasons your miter saw blade is coming loose. Once the bolt on your saw blade is not well tightened, your miter saw blade would become loose. It would be best to tighten it correctly so your miter saw blades can start working effectively. You can see our simple DIY steps on how to tighten it below.

Worn plate

If your miter saw blade is coming loose, the wear plate is worn out. The wear plate is located between the saw’s base and the blade. You may turn the base in any direction thanks to the wear plate. However, this part will eventually wear down over time and cause the saw blade to become loose because the blade is attached to the saw.

To resolve this issue, you must replace the worn plate. Below is a simple guide you can follow to replace a worn plate in your miter saw blade.

How to fix a miter saw blade that is coming loose?

You can fix a miter saw blade that is coming loose by replacing the damaged spring. Tightening the loose bolt in the miter saw blade or replacing a worn plate is another way you can fix a miter saw blade that is coming loose.

Replace the spring

Your miter saw blade would keep coming loose if the saw’s spring is damaged. You will need to replace it when you notice a damaged spring. Here is a simple step to follow;

Unplug the miter saw.
Unscrew the guard link screw and the two screws on the mounting plate.
Remove the mounting plate’s center screw, washer, nut, and small washer, and then detach the mounting plate from the blade guard.
Remove and replace the damaged spring, ensuring that the spring ends catch the tabs inside the blade guard.
Reattach the mounting plate, ensuring it catches the spring tabs.
Tighten the big washer and screw on one side, then the small washer and nut.
Reinstall the blade guard on top of the blade.
Tighten the back screw on the mounting plate.
Replace the blade guard on top of the blade.
Tighten the mounting plate’s rear screw first, then the front screw, and reattach the blade linkage and screw.

Tighten the bolt

A loosed bolt is one of the vital causes of a loose blade. To fix this, you must ensure the bolt on the blade is well-tightened. Here is how to tighten it;

Unplugged your miter saw.
Tighten the arbor nut, which holds the blade in place, with a spanner, Allen key, or a socket wrench.
If your saw has a shaft lock, use it to keep the blade from moving while you turn the arbor nut.
If the saw lacks a shaft lock, use a clamp or vise grip to secure the blade while tightening the nut.
Tighten the nut in the opposite direction of the saw blade’s rotation. Otherwise, every time you use the saw, the rotation of the blade would unscrew the bolt, causing the blade to lose!
If the miter saw is in a right-handed circular, tighten the bolt in a clockwise direction.
If the miter saw is in a left-handed circular, tighten the bolt in a counterclockwise direction.
To prevent the nut from spinning, use a wrench to grip the outside flange (rim).
With your other hand, turn the nut in the opposite direction that the blade spins by using a spanner, Allen key, or socket wrench.

Note: Ensure you follow your manual guide while employing the above guide. Also, always check the blade of your circular saw frequently to ensure it is correctly aligned and adjusted.

Replace the plate

Over time, due to frequent rotation, your plate will become worn. If your plate becomes worn, it will cause your blade to keep coming loose. You will need to replace it to fix this issue, and below is a simple step on how to fix it;

Unplug the miter saw.
Remove the fence, then the kerf plates.
Remove the center bolt and all of the pieces attached to it. (Take note of how they are so you can easily reassemble them at the end)
Separate the saw from the base once it has been removed.
Remove the worn plate, clean the surrounding region, and replace it.
Reattach the saw to the base and replace the bolt from below.
Replace the washer, roller bearing, washer on top, and nut.
Tighten the nut just enough that you can move it freely but not too readily – there should be some stress on it.

Note: Always use your manual guide in every step while replacing it.

Why your Dewalt miter saw blade is coming loose?

The reason your Dewalt miter saw blade is coming loose is because the bearing is bad. The Dewalt miter saw blade is built so that the bolt on the blade is well-tightened and cannot easily loose. So, once you notice your Dewalt miter saw blade is coming loose, you need to check the bearing.

Here is how to check it;

Unplug your Dewalt miter saw.
Remove the outer flange, the blade, and the inner flange.
Remove any washers and bushings, then the spindle assembly by unscrewing the screws that hold it to the saw.
After removing the spindle assembly, spin the bearings to determine which one is faulty.
Bearings should be smooth and quiet at all times.
If one of the bearings is not, then it is damaged and needs to be repaired.

After checking your Dewalt miter saw blade and you notice a bad bearing, then you need to replace it. Here is how to replace it;

Use a bearing puller to remove the bad bearing in the shaft.
Tap a new bearing onto the shaft with a socket that only touches the bearing’s inner race to avoid damage.
For the bearing inside the sleeve, use a bearing puller to separate the sleeve from the spindle.
Then, use a socket that only touches the outer race of the bearing and tap it free with a hammer.
Put the sleeve on the shaft, and then use a socket that only touches the inner race of the new bearing to put it on. This will keep the bearing from getting damaged.
Use a hammer to put it in place.
Put the arbor screw into the shaft and tap it with a hammer to ensure the bearing is in the sleeve.
Don’t tap on the shaft itself because that could damage it.
To seat the bearing, you may have to switch between tapping on the inner race with a socket and tapping on the end of the shaft.
Reinstall the spindle assembly back into the saw.
Reinstall washers and bushings back on.
Put the inner flange, blade, and outer flange back together again.

Why your Ryobi miter saw blade is coming loose?

The reason your Ryobi miter saw blade is coming loose is because the blade is bent or wrapped. This can happen due to overheating. To see if the blade is bent or warped, take it out of the saw, put it on a completely flat surface, and look at it from the side.

You should see if the blade is completely touching the surface. If it isn’t, it is warped. You can also use your finger to push down on all of the edges. If it moves up and down, then it is bent. You need to replace the blade of your Ryobi miter saw if you notice any of these signs.

Here is how to replace it;

Unplug your Ryobi miter saw.
Rotate the bottom blade guard upward to reveal the Phillips-head screw that secures the blade bolt cover.
To see the hex-head blade bolt, loosen the screw and rotate the blade bolt cover up and out of the way.
Insert the spindle lock button and rotate the blade bolt until the spindle lock fully engages, preventing the blade bolt from rotating.
Using a 10-millimeter/12-millimeter combination wrench, loosen the blade bolt.
The blade bolt is lefthand threaded, which is the opposite of typical threading.
To loosen and remove the bolt, turn it clockwise. Take note of the location of the outer washer and remove it as well.
Apply a small amount of machine oil to the inner blade bolt washer.
Install the new saw blade by sliding it up past the lower blade guard and onto the blade spindle.
At the front of the saw, the blade teeth should point downward.
Saw blades frequently contain rotation arrows that might assist you in double-checking that the saw is set up to revolve in the proper direction.
To lock the spindle and reinsert the blade bolt, press the spindle lock button.
The blade bolt should be tightened counterclockwise.
Reinstall the blade bolt cover.
Reinstall the blade bolt cover screw.