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Tool Talk Discussion Forum

Maybe a stupid question, air tools and cfm

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scott#2

02-03-2008 15:06:00




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I see some of the bigger air tools need 20 cfm to run. I have a 14 cfm pump on a 60 or 80 gallon tank (cant remember). Will the air in a fully charged tank be good enough to run these bigger guns for say 10-15 second spurts to break large nuts and bolts? Or is this wishful thinking?

Thank You,

scott#2




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NCWayne

02-04-2008 16:27:26




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 Re: Maybe a stupid question, air tools and cfm in reply to scott#2, 02-03-2008 15:06:00  
If you read the fine print in the catalogs and tool guides, the air consumption listed for most impact tools are actually rated on a 15 second burst anyway. In other words if a tool is rated at 15 cubic feet of air consumption then in reality it needs 60 cubic feet a minute or 1 cubic foot a second to operate to spec. I learned this from an IR rep several years ago when specing a compressor for my service truck to run a 1 inch drive impact. It needed right at 60 CFM to run properly and the only hydraulic driven compressors commonly available were in the 35 CFM range. With a little research I found a hydraulic driven, VAN-AIR brand,k rotory screw compressor with 80CFM capibility at 150 psi. Needless to say my 1" drive has never been as strong as it is with plenty of flow and pressure.

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Stumpalump

02-03-2008 20:52:35




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 Re: Maybe a stupid question, air tools and cfm in reply to scott#2, 02-03-2008 15:06:00  
Yes it will run them.



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Charles (in GA)

02-03-2008 19:08:18




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 Re: Maybe a stupid question, air tools and cfm in reply to scott#2, 02-03-2008 15:06:00  
Given a large air hose and high flow couplers, a decently large compressor tank will give you that short burst of air several times, but be prepared to wait for it to pump back up.

Don't forget the regulator if you have one, make sure it is a high enough CFM capacity too.

Charles



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rustyj

02-03-2008 15:25:22




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 Re: Maybe a stupid question, air tools and cfm in reply to scott#2, 02-03-2008 15:06:00  
I have a compressor about that size, and it operates one of my CP (US) impact wrenches, but it doesn't have the power for the other one. And thay are the same style and mfgr. It will run air sanders a while, but i do have to stop after a time to let it catch up. It will keep the pressure for a production type spray gun, and some other things. You might have to let the compressor rest for a while, if using it continuously. If ya need continuous air, at pressure, better buy bigger!

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