When a power tool like an angle grinder stops working, it’s often due to a problem with the carbon springs. Although this may seem like a complex failure, there is a creative and inexpensive solution that uses the inside of a common battery to repair carbon springs.

This method not only restores the functionality of your tool, but also takes advantage of materials you already have at home. If you want to see how to repair it, watch the following video made by Amazing Smart:

How to fix your grinder with a battery

With this creative and economical technique, you can extend the life of your angle grinder by using accessible materials. Give it a try and see for yourself how effective this solution is!

Materials Needed

1. Common battery (preferably AA or AAA, depending on what you have available).
2. Angle grinder with damaged or worn carbon springs.
3. Small pliers to handle the pieces.
4. Screwdriver (suitable for opening the angle grinder housing).
5. Electrical or shrink tape (optional, to secure the spring if necessary).
6. Cutter or blade to open the battery.

Procedure

Step 1: Disassemble the angle grinder

• Turn off and disconnect the tool from any power source to avoid accidents.
• Using a screwdriver, remove the angle grinder housing to access the internal components.
• Locate carbon springs, which are usually near the engine. If they are damaged, identify which part requires repair.

Step 2: Remove the inside of the battery

• Using a cutter or blade, carefully open the metal battery housing.
• Remove the inner contents. Focus on the carbon rod inside the battery, as it will be the key component for this repair.

Step 3: Adjust the spring

• Adjust the carbon rod removed from the battery, making sure it matches the dimensions and shape of the original carbon spring. If necessary, you can file or sand it to give it the correct shape.
• If necessary, cut the spring to fit it to the proper length.

Step 4: Install the new spring

• Place the adapted rod in place of the original spring. Make sure it is securely fastened and in contact with the necessary components so that it can conduct electricity properly.
• If necessary, use electrical or shrink tape to secure the installation.

Step 5: Reassemble the Grinder

• Once the new spring is installed, check that everything is in place and close the tool housing again with the screws.

Step 6: Test the tool

• Plug in the angle grinder and turn it on to check that it is working properly. If everything is fine, you will have completed the repair successfully.

Useful tips

1. Be cautious when opening the battery:
   • Handle the battery with care, as some internal components can be toxic or dangerous if they come into contact with the skin.
2. Wear gloves and goggles:
   • Protect your hands and eyes while working to avoid accidents with sharp tools or electrical components.
3. Make sure a good electrical contact:
   • Check that the spring is properly positioned to ensure efficient conduction of electricity.
4. Test before closing:
   • Before you fully assemble the tool, test it to make sure it works to avoid having to open it again.
5. Save leftover spare parts:
   • Battery debris can be useful for future repairs, so keep it in a safe place.