Why does my circular saw keep stopping?
The reason why your circular saw keeps stopping is due to dull/broken blade, worn motor brushes, or frayed cord. Other reasons that could cause your circular saw to keep stopping is because of a loose arbor nut, a malfunctioned motor, a warped blade or an excessive sawdust.
When to Replace a Circular Saw Blade?
A blade is one of the important parts of a circular saw. To work using your circular saw, the blade is responsible for the cutting of your workpiece either for making cross-cuts, rip-cuts, or a combination of both.
However, due to the heave usage of the blade, it tends to be worn out over time. Thus, a dull circular saw blade is one of the most common reasons why your circular saw keeps stopping.
What Causes Worn Circular Saw Motor Brushes?
Motor brushes in a circular saw deliver electric current to the wires inside the circular saw motor. Although their function is significant in making your circular saw operate, the motor brushes tend to wear down over time. Once the motor brushes start to wear down, the circular saw might start to perform poorly and eventually cause your circular saw to keep stopping.
That’s why it is important to check your motor brushes from time to time and to look out for any indications that it needs replacement such as poor performance of circular saw, burning smell, circular saw not working or keeps stopping, or frequent sparks.
Frayed Power Cord
If the power cord is damaged, it is most likely that your circular saw will keep on stopping. It is best to check the outer shell of the power cord first since this wear down after some time. However, the damage might not be seen externally but rather, in the interior of the cord. Frayed interior wires of the cord might be due to your cable often tangled or squished under a heavy object. A frayed power cord is a usual culprit as to why your circular saw keeps stopping.
Loose Arbor Nut
One of the reasons why your circular saw keeps stopping is due to a loose arbor nut. The arbor nut attaches your blade to the saw. So, if it is loose, then it is likely the cause of your circular saw problem. You can fix this by tightening any loose parts in your circular saw. If it is damaged, then it needs replacement.
Malfunctioned motor
A malfunctioned motor might be the reason why your circular saw keeps stopping.
A common culprit of a malfunctioned motor is the motor brass. One indication that your motor brass is damaged is when your circular saw makes a hissing or clicking noise. Thus, your motor brass needs a replacement.
Warped or damaged blade
If the blade of your circular saw is warped or damaged, you don’t have any other reason to keep it. Aside from it is not safe for you to work using a damaged blade, it could also give you an inconsistent performance.
The teeth of your blade might get caught on the wood which is a clear proof that your blade is damaged. If you have a warped blade, it is most likely to pinch your workpiece. Either way, using your circular saw with a damaged or warped blade is not advisable and should be replaced immediately to prevent any hazards.
Excessive Sawdust
Another reason why your circular saw keeps on stopping is due to excessive sawdust that built-up in your circular saw motor. Once the motor gets clogged with sawdust, it will be hard for the motor to let adequate air to cool its place. This will lead to an overheated motor and suddenly refuse to operate.
How to fix a circular saw that keeps stopping?
Your circular saw that keeps on stopping can be fixed by replacing your dull/damaged circular saw blade, changing your worn motor brushes into a new set of brushes, switching your frayed cord with a new one, cleaning excessive sawdust in the motor, or securing the arbor nut.
How to Replace a Dull or Damaged Circular Saw Blade?
A great way to fix your circular saw that keeps on stopping is to replace your dull or damaged blade by following these steps:
- Unplug or remove the battery of the circular saw.
- Move the guard aside.
- Remove the bolt attaching the blade to the machine by loosening the bolt using a blade wrench.
- Hold the blade either by using pliers or vise grips.
- If you use the pliers, hold the circular saw blade using the pliers and loosen the bolt with a blade wrench.
- If you use the vise grips, you can lock the vise grips in one place of the blade and loosen the bolt smoothly with a blade wrench.
- Once you have loosened the bolt, you can remove the bolt and the flange
- Hoist the blade out.
- Clean the area if it is dirty.
- Set the new blade in the blade area by following the arrow direction printed on the blade.
- Put back the flange in place.
- Re-fasten the bolt and lock the new blade using either the pliers or vise grips.
- Secure it with the blade wrench.
- Once the bolt is secured, take the vise grip off.
How to Change Circular Saw Motor Brushes?
To find out if your circular saw motor brushes need a replacement and to eventually switch them with a new set of motor brushes, here are the steps:
- Unscrew the motor brush cap.
- Pull the old motor brush away from the brush holder.
- Check if it is worn down and replace the old motor brushes with the new set of brushes.
- Push the new set of brushes inside the brush holder.
- Slide the brush cap and screw it back.
How to Fix your Frayed or Broken Circular Saw Power Cord?
Fixing your circular saw that keeps stopping might be due to a frayed or broken power cord. These are the things you need to do to fix it:
- Remove the screws attached to the gear housing by using either a screwdriver or a screwdriver drill.
- Remove the gear casing once all screws are unfastened.
- Loosen the screws that secure the cable.
- Unfasten the screws holding the wires by using a flathead screwdriver
- Pull the wires out of the string relief.
- Push the new cord inside the string relief.
- Thrust the wires inside the wire holder and secure them by putting back the screws.
- Put the wire holder back in its place as well as the cable.
- Tighten back the screws which hold the cord.
- Fit the gear casing back on and fasten the screws to secure the casing by using either screwdriver or the screwdriver drill.
Why does my Ryobi circular saw keep stopping?
The reason why your Ryobi circular saw keeps stopping are due to a weak battery or damaged blade. Here are the steps to fix your Ryobi circular saw that keeps stopping:
- Unplug your Ryobi circular saw.
- Push the lock gate and turn it in a direction where you could go all the way in.
- Hold on to that direction.
- Remove the arbor nut using a blade wrench.
- Look out for the arrow instruction printed on the blade holder.
- Follow the direction on the holder when placing the blade.
- Turn upside the holder and set the blade in.
- Put back the flange on top and secure it with the arbor nut using a blade wrench.
- Don’t over-tighten the nut.
- Check the battery of your Ryobi circular saw.
- If it has a 1.5A or 2.0 Amp battery, consider changing the battery to a 4.0 amp.
Why does my Bosch circular saw keep stopping?
Your Bosch circular saw might have been stopping because of shabby motor brushes. To fix your Bosch circular saw that keeps stopping, follow the steps:
- Take off the rear panel of the washer and the drive belt.
- Unfasten the screws attached to the motor casing.
- Remove the plug of the motor.
- Hold the motor and take it out
- Pull the brushes out and replace them.
- Put the motor back and secure it by tightening the screws on the motor casing.
- Place the rear panel of the washer and the drive belt back as well.
Why does my Makita circular saw keep stopping?
A damaged cord or worn motor brushes might be the reason why your Makita circular saw keeps stopping. The following are the steps that you can do to fix it:
- Take the casing of the saw handle by removing the screws.
- Remove the casing.
- Unfasten the screws in the cord clamp.
- Take away the two cord wires attach to the switch.
- Remember where the white and black wires mount.
- Pull the string relief out of the cord.
- In case the string relief has cracks and is brittle, consider replacing it as well.
- Push the new cord inside the string relief.
- Place the new cord into the saw and secure it with the cord clamp.
- Affix the screws on the cord clamp.
- Put back the switch in its place and tuck the wires inside.
- Re-attach the handle casing by re-fastening the screws.
- Unfasten your motor brush caps.
- Pull out the motor brushes and check their condition.
- If it is worn down, install the new motor brushes.
- Slide the new motor brushes inside the brush holder.
- Secure it with the brush cap by re-fastening the screw.
Why does my Milwaukee circular saw keep stopping?
Your Milwaukee circular saw might keep stopping due to a dull blade. To replace the blade of your Milwaukee circular saw that keep stopping, these are the following procedure:
- Turn over the Milwaukee circular saw.
- Push the small button on the back and try to loosen the arbor nut on the blade using the blade wrench.
- Once the nut has loosened, take it off.
- Turn the guard a bit and lift the old blade.
- Slide the old blade out of the blade holder.
- Make sure that the print on the new blade is on the outside when you put the new blade inside the holder.
- Tighten the arbor nut.
- Release back the guard and lock in place the nut.
- Make sure that the arbor nut is not over-tighten.
Why does my Hitachi circular saw keep stopping?
Some of the causes why your Hitachi circular saw keeps stopping are damaged cords or worn-out motor brushes. Here are the steps to fix your Hitachi circular saw that keeps stopping:
- Remove the casing using the screwdriver drill.
- Take off the screws attached to the cord clamp.
- Get the switch and unfasten the screws securing it.
- Slide the old cord out of the cord protector.
- Thread inside the cord protector the new cord.
- Put the new wires inside the switch.
- Put the switch back and re-attached the cord clamp by re-fastening the two screws back.
- Tuck in the wires inside the casing.
- Re-attach the casing by securing it with the screws.
- Open the brush holder by unfastening the brush cap.
- Pull the motor brushes out and inspect their condition.
- If it has word down, replace it with a new one.
- Slide the new brushes inside the holder.
- Secure it with the brush cap by re-fastening the cap.
Why does my Craftsman circular saw keep stopping?
A warped/defective blade or excessive sawdust in the motor might be the culprits as to why your Craftsman circular saw keeps stopping. The following are the steps to resolve that problem:
- Unplug or remove the battery of the Craftsman circular saw.
- Use a wrench to loosen the bolt attached to the blade.
- Turn the wrench and arbor nut in a clockwise direction.
- Take the washer off.
- Move away from the blade guard and slide the new blade inside.
- Be sure that the new blade is under the blade guard.
- Put the retaining washer back and the arbor nut.
- Tighten the nut by turning it counter-clockwise.
- Release the spindle lock and secure the blade with the wrench.
- Open up the Craftsman circular saw and clean the parts of the motor that might have excessive sawdust.
