Impact gun CF per burst?

[JHZR2]

Hi,

Any estimates for a good, high torque impact gun (like an IR) how many CF are used per burst?

I think they are rated at, say, 7-10 CFM at 90 PSI, but one doesnt fire the gun for a minute straight when doing five lugs on a tire... It is maybe 5 seconds or 10 seconds each... Is that a good rule of thumb?

But Ive never actually timed it, so I dont really know.

Any estimates?

Thanks!

 

[Trav]

Less than 1 CFM per 10 sec burst i would guess. It doesnt take a big compressor to run one.
Large CFM compressors come into play with DA sanders, grinders, cutoff wheels and such as well as some large CFM spray guns.

I have a few IR guns some real expensive but my favorite is still this one and an old CP (not central pneumatic).

http://www.ebay.com/itm/Ingersoll-Rand-2...=item1c2e249969

 

[SuperDave456]

At least a 20 gallon tank, closer to 30 would do you better.

I bought one thinking that my 3 gallon 2hp job would work. I was wrong. You get half a second of good torque then almost nothing.

I then decided to buy an electric impact because it did not. I'm actually impressed with the one I picked up from Craftsman. Shop around and you can probably get a deal.

 

[JHZR2]

I have a great IR electric cordless and a Milwaukee corded. It was more for general interest... Thanks!

 

[eljefino]

I've run my impact gun well beyond the duty cycle of a 2 hp 120V 15 amp compressor. Driving lag screws for a woodshed was a nice workout.

I sometimes wonder about air tools, seems like sound and fury doing nearly nothing.

 

[Jakegday]

Originally Posted By: eljefino


I sometimes wonder about air tools, seems like sound and fury doing nearly nothing.

Plain and simple, they save time. And lots of it. And for auto mechanics, time equals money.

 

[Chris142]

My 1/2 Impact guns (IR,MAC and a HF Earthquake) will bust a lugnut loose as soon as I pull the trigger. I used my IR231 to bust the lugnuts on my Peterbilt off at home with only a 20gallon tank. I was able to get 5 off then wait for the compressor to catch back up.


IMO a 1/2 impact does not use a lot of air considering the power it puts out