It uses rotating mass to create high-torque impact, which is then transferred to the shaft and onto your stubborn bolt or nut.
Yes, small air compressor can run air impact wrench as it delivers enough air pressure for this job..
Now, CFM requirements pneumatic impact wrench can have is around 3 to CFM.
The bigger the compressor is, the longer you can run before you have to stop and refill..
Now, small air compressor with tank size of around 6 to 20 gallons can run pneumatic impact wrench..
But here's the catch the smaller the tank, the more often the compressor will have to cycle on and off to refill it, and it can also mean waiting around for the pressure to build back up..
duty cycle means the compressor can run for half the time, and then it needs to rest for the half while 100% duty cycle means the compressor can run continuously..
small air compressor might not have the power as larger one, except it can still keep your impact wrench running effectively..
Meaning, you want compressor with CFM, which is around 3 to CFM in the case of small air compressor..
small air compressor with tank size of around 6 to 20 gallons should deliver enough air pressure to run air impact wrench that can remove lug nuts..
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