Why my Milwaukee Impact Wrench Smell Burning?

If you’ve ever used a Milwaukee impact wrench, you know that they can be powerful tools that make quick work of tough bolts and nuts. However, if you’ve ever noticed a burning smell emanating from your Milwaukee impact wrench, it might be cause for concern. It could indicate a problem with the tool that needs to be addressed.

In this article, we’ll explore some common causes of this burning smell and what you can do to fix it. So, let’s dive in and discover why your Milwaukee impact wrench might smell like it’s on fire.

why my milwaukee impact wrench smell burning

Causes of the burning smell

There are several potential reasons for your Milwaukee impact wrench emitting a burning smell. Some of the most common causes include:

Worn motor brush

The motor brushes in your impact wrench are responsible for conducting electricity to the motor. If these brushes are worn or damaged, they may produce a burning smell as they rub against the motor. A study by the University of Illinois found that motor brushes are the most likely cause of electric motor failure.


Another potential cause of a burning smell in a Milwaukee impact wrench is overheating. If you’ve been using the tool for an extended period, the internal components may start overheating and produce a burning smell.

Dust and debris

Dust and debris can accumulate inside your impact wrench over time, especially if you use it in a dirty or dusty environment. This build-up can clog the air vents, causing the tool to overheat and emit a burning smell. It’s important to regularly clean the tool and remove any dust or debris to prevent this issue.

Electrical issues

Another potential cause of a burning smell in a Milwaukee impact wrench is an electrical issue. If the wires are shorted, or the connections are loose, it could cause the tool to malfunction and produce a burning smell.

See Also: How to Repair Impact Wrench – Complete Guide?

How to troubleshoot the smell-burning issue

If you’re experiencing a burning smell in your Milwaukee impact wrench, there are a few steps you can take to troubleshoot the issue:

Step 1:

Check the motor brushes; If the motor brushes are the issue, you’ll need to replace them in order to fix the problem.

Step 2:

It’s essential to allow the tool to cool down after prolonged use to prevent overheating and extend its life.

Step 3:

Clean out any dust or debris inside the tool. If dust or debris has accumulated inside the tool, it could be causing the burning smell. Clean the tool carefully using a can of compressed air or a soft brush.

Step 4:

If an electrical issue is causing the burning smell, you’ll need to inspect the wiring and connections for any damage or looseness. If you find any issues, make the necessary repairs to fix the problem.

Preventative maintenance to avoid future burning smells

In addition to troubleshooting the issue if you’re already experiencing a burning smell in your Milwaukee impact wrench, there are also some preventative measures you can take to avoid this problem in the future. These include:

  • Keeping your impact wrench clean and well-lubricated can help prevent dust and debris build-up and reduce wear and tear on the internal components.
  • Please don’t push the tool beyond its maximum capacity. Each power tool has a maximum capacity, and it’s important not to exceed this limit to avoid overheating and other problems.
  • As mentioned earlier, allowing the tool to cool down after extended use is vital to prevent overheating and extend the tool’s life.
  • Keep your tool in a dry, secure location when not in use. Proper storage can help protect your impact wrench from damage and extend its lifespan. Make sure to store the tool in a dry, safe place when it’s not in use to prevent any accidents or damage.


What can cause the electric motor to burn?

Several factors can cause an electric motor to burn out. One of the most common is overloading, which occurs when the motor is asked to do more work than it can handle. The burning smell when using your Milwaukee impact wrench could be due to either using a motor that is not suitable for the task at hand or applying too much strain on the motor with a load that is too heavy.

Other factors leading to motor burnout include inadequate ventilation, which can cause the motor to overheat, and failure to maintain and lubricate the motor properly. Occasionally, faulty wiring or manufacturing defects can also contribute to motor burnout. To avoid this issue, it is crucial to accurately match the motor to the load and keep it properly ventilated and well-maintained.

Is my Milwaukee impact wrench supposed to spark?

If you’re using your Milwaukee impact wrench and noticing sparks flying from the tool, you might wonder if this is normal. While it’s not uncommon for sparks to appear when using an impact wrench, it’s essential to pay attention to the intensity and frequency of the sparks.

If they seem excessive or a burning smell accompanies them, it could indicate a problem with the tool or the fastener you’re working on. It’s best to consult the manufacturer or a qualified repair technician if you’re unsure about why your tool is producing sparks.

Why does my power supply smell like burning plastic?

If the power supply is malfunctioning or overheats, it can cause the plastic housing to melt or burn, leading to an unpleasant smell like the plastic burn. It’s essential to address this issue as soon as possible, as a faulty power supply can damage other components within your computer or even start a fire.

If you continue to smell burning plastic from your power supply. It’s best to shut off your device and unplug it immediately before seeking professional assistance.


Finally, a burning smell in a Milwaukee impact wrench could be caused by various issues. Including worn or damaged motor brushes, overheating due to extended use, clogged air vents or dust build-up, and electrical problems such as shorted wires or loose connections.

By following the troubleshooting steps outlined above and taking preventative measures to maintain your tool, you can help prevent this issue from occurring and ensure your impact wrench continues to perform at its best. Remember, proper maintenance is key to keeping your power tools in top condition and ensuring their longevity.

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