What Size Air Compressor Do I Need For Impact Wrench?

What Size Air Compressor Do I Need For Impact Wrench?

Air compressors are an essential tool for many DIY enthusiasts and professionals, and they are commonly used in conjunction with impact wrenches. Impact wrenches are powerful tools that are used for tightening and loosening nuts and bolts, and they require a significant amount of air pressure to operate effectively. In this article, we'll explore the key factors that determine what size air compressor you need for an impact wrench so without any further ado let's take a look at it.

What Is An Impact Wrench?

An impact wrench is a tool that is used to tighten and loosen nuts and bolts. It uses a combination of torque and hammering action to apply a high amount of force quickly. Impact wrenches come in various sizes as well as are powered by either electricity or compressed air.

Understanding Air Compressor Size:

The size of an air compressor refers to the volume of air it can produce, typically measured in cubic feet per minute (CFM) . The higher the CFM rating the more air the compressor can deliver and the more power it can provide to your tools. When selecting an air compressor for an impact wrench, it's essential to consider the CFM requirements of your tool.

What Size Air Compressor Do I Need For My Impact Wrench?

The size of the air compressor you need for your impact wrench depends on several factors and the most important factor is the size of the impact wrench itself. A larger impact wrench will require a larger air compressor to provide enough air pressure and volume to operate effectively. Another important factor is the amount of work you will be doing with your impact wrench and if you will be using your impact wrench frequently and for long periods you will need a larger air compressor that can sustain continuous use.

Impact Wrench CFM Requirements:

The CFM requirements of an impact wrench vary depending on the size and type of the tool. Smaller impact wrenches typically require less CFM than larger ones. For example, a 1/2-inch impact wrench may require 4-5 CFM, while a 3/4-inch impact wrench may require 7-8 CFM. Additionally, some types of impact wrenches such as those with twin hammers or advanced torque settings may require more CFM than others.

Calculating CFM Requirements:

To determine the CFM requirements of your impact wrench, you can consult the user manual or check the specifications of the tool online. Once you have this information you can calculate the minimum CFM rating that your air compressor needs to deliver. To do this, you'll need to multiply the CFM requirements of your impact wrench by 1.5. This calculation takes into account the fact that air compressors typically require a higher CFM rating than the tool itself to operate effectively.

Example Calculation:

Let's say you have an impact wrench with a CFM rating of 4.5. To determine the minimum CFM rating you need for your air compressor you would multiply 4.5 by 1.5, which gives you a minimum CFM rating of 6.75. Therefore, you would need an air compressor with a CFM rating of at least 6.75 to operate your impact wrench effectively.

Other Factors to Consider:

In addition to the CFM requirements of your impact wrench, there are a few other factors to consider when selecting an air compressor.

These include the tank size, the horsepower rating, and the duty cycle. A larger tank size can provide more consistent air pressure while a higher horsepower rating can deliver more power to your tools.

The duty cycle refers to the amount of time the air compressor can operate continuously without overheating and it's important to select a compressor with a duty cycle that matches your needs.

Frequently Asked Questions FAQ:

How Much Air Pressure Do You Need For An Impact Wrench?

The required air pressure for an impact wrench typically ranges from 90 to 100 psi (pounds per square inch).

Can I Use An Electric Impact Wrench With An Air Compressor?

No, electric impact wrenches are designed to be powered by electricity and cannot be powered by an air compressor.

Can I Use A Small Air Compressor With A Large Impact Wrench?

No, a small air compressor will not be able to provide enough air pressure and volume to operate a large impact wrench effectively.

What Are The Air Requirements For 1 Impact?

The air requirements for a 1-inch impact wrench vary depending on the specific model and manufacturer but typically require around 10-12 CFM (cubic feet per minute) of air volume and 90-100 psi (pounds per square inch) of air pressure.

Will A 100 PSI Air Compressor Run An Impact Wrench?

The compatibility of an impact wrench with a 100 psi air compressor is contingent upon the particular specifications and needs of the impact wrench. While some impact wrenches may work with a 100 psi air compressor others may require a higher psi to operate effectively.

It's important to check the manufacturer's specifications for the impact wrench to ensure that the air compressor is suitable for the job.


Selecting the right size air compressor for your impact wrench is essential to ensure that your tool operates effectively and efficiently.

By calculating the CFM requirements of your impact wrench and considering other factors such as tank size, horsepower rating, and duty cycle, you can choose an air compressor that meets your needs and delivers the performance you require. If you find this article helpful then share it with others and have an amazing day.

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