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Old 09-05-2005, 06:54 PM
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Help with an Air Compressor

Hi folks. This is my first post and I hope I ask it in the right way.
Im presently looking for a new Air Compressor and I was reading some threads last night. I saw a good a good thread on air comps. and had a couple of questions. first what exactly is SCFM i've always heard of CFM's
Second. Im looking at 2 compressors at home depot and the 2 differences ar the first is 7-hp 2 stage, 80-gallon tank, 12.6 scfm@80 psi,max pressure is 175 psi. Now that one is at the store. The second one is on there site the specs are about the same except I noticed the engine is different maybe bigger.
and it is rated at 22 2/25.1 scfm @90/175 now both comps.are on the site so what IM asking are these good enough comps to do for a home Novice.
Or should I consider another Brand. I have a Sata nr/95 and fixing to get a couple of Iwata's. I heard the sata is a hog it requires at least 13 1/2 cfm @ 40 I was told and the rest of the stuff is regular tools no need to go and list them. I will be leaving town in the morning so let me say thanks now and I hope to get a couple of kickbacks before then so thanks... Randy

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Old 09-05-2005, 07:01 PM
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I Have The First One You Mentioned From Home Depot, And It Is Plenty Big Enough For Any Home Shop. I Usually Have Two Air Tools Going At One Time And It Is Plenty Big Enough For Anything You Will Need.if You Are Doing Any Painting You Will Wont To Add A Dryer System To It, I Have A Devilbiss Dryer Desiccant And It Is Well Worth The Money. Hope This Helps, Mike.
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Old 09-05-2005, 07:22 PM
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SCFM is the real number you watch for, if you see ACFM on a compressor w/ no SCFM rating, do not buy it. ACFM stands for assisted tank CFM or assisted CMF, this rating is a garbage rating, means it has a garbage pump on a big tank and they are trying to make it sound good. SCFM means constant flow from the pump. If ya want to make out a little cheaper, you could buy a cheaper HF compressor, get the 400 and somthing dollar 60 gallon compressor, this compressor has lots of ACFM ratings but no SCFM ratings, then get a replacement pump, get as big as your willing to pay but still staying with the HF's motor rpm rating ( all the pumps have a min/ max RPM and to obtain the good CFM numbers the motor should turn those optimal RPM's ), you could end up with a 15-20 SCFM unit for a couple hundred less than the 12 CFM unit.
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Old 09-05-2005, 07:39 PM
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Randy I would suggest buying a compressor that puts out 20+ cfm... Body tools eat up allot of air and allot of guns require 12-14 cfm... If you buy a compressor rated at 13, by the time you choke it down with water traps ( notice I said traps not one) and air hoses then regulators you can be assured you are not gettng the specified cfm at your gun.... I have one of those CH compressors that are 2 stage supposed to be 7 hp continiuos... that is really only 4hp if you go by the amps the motor puts out... That is the only true way to see what you are buying.... Dont buy a compressor with less than 18 amp motor IMO... allot of DIY guys make due with much less compressor, but if you are going to spend 800 dollars why not spend 1100 dollars and get one you wont ever have to replace ( hopefully) and can run any tool you have.

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Old 09-05-2005, 09:54 PM
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Thanks a lot guys. IM not just a noobie you can call me super noob LOL.
I will be leaving tomoroww for a month but IM glad I found this board.
but thanks a lot...Randy
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