Wanted to know how much cfm in getting from my compressor at 25 psi if it gives 7.2 cfm at 40 it's a craftsman professional compressor 27 gallon 150 psi max

If you don't have any air leaks, the cylinder head gasket is probably bad on the pump. Easy fix for less than $10. you can get the parts you need here:
http://www.mastertoolrepair.com/sears-craftsman-919195411-p-48270.html or ebay.com. For around $50 you can get the whole rebuild kit.

Nicholas:
It is possible to replace the regulator with a higher capacity regulator. Almost all air tools warn against using more than 90 PSI, and I think that your regulator is limited to 90 PSI for safety reasons... (but why on a compressor capable of 150 PSI I don't know). If you need more pressure, buy a replacement regulator (doesn't have to be Sears) and use a 1/4 inch nipple or a short length of air hose to connect it to your compressor.

Hi, I have a sears compressor I will take the gauge and have them check for a problem, and will replaced it good luck.

Is it possible that this compressor is wired for 220V and you are plugging it in to 110V? Or did it just start doing this?

A screw type compressor will be the better solution. Screw compressors are made to run. You can also get screw compressors with variable speed with means electrical savings. Ingersoll has screws that are up to 150 psi. Atlas Copco has screws that I know go up to 175 psi. I don't know if it's still available but the Government had assistance plans or grants if purchasing a compressor with a power savings feature.

The two most important specs are CFM at 90 psi (that's how fast the compressor can compress more air when the tank starts to run low) and how big the tank is. Virtually any compressor that has a top pressure rating 20 psi higher than you need for your tool (which is usually about 90 psi) and that has a tank of a couple of gallons will work. But the smaller the tank, the shorter time you can operate the tool before the compressor has to kick in. And the lower the CFM at 90, the longer you will have to wait for the tank to come up to pressure again so you can operate the tool at full pressure. If this is for occasional use and you aren't in a hurry, you don't need much of a compressor at all. If you want to operate continuously, then you should get something with a CFM at 90 psi that is higher than your tool's CFM consumption. Keep in mind that impact wrenches don't operate continuously like paint sprayers do. Good luck. Vote if you found this helpful. Al K

The spec is 25-30 ft lbs.

Here are the specs.

http://shoppingcart.msservicecompany.com/msservice_net/product_files/D22629/d22629.pdf

my ace air compressor which is 26 gallon 5 hp will not get over 60psi what is wrong with it please?

Not that I have read up on. But if I remember right you can go to IR home page and get a number to call a tech or even order a book on it.

Home Use: Compressed-air power tools can dramatically decrease the amount of time spent on a project. Many homeowners will use smaller, portable units (either hand-carried or wheeled) that move easily from the garage to the house, yard or roof. Common air toolsAir Tools such as brad nailersAir Nailers, reversible drillsAir Drills, and impact wrenchesAir Impact Wrenches require about 0–5 CFM (Cubic feet per minute — units in which air flow is measured). It's important to know if the compressor you purchase will drive the air tool you'll need for your project. For example, smaller air nailersAir Nailers run on 2 to 5 CFM at 70 to 90 PSI, while larger shearsShears, sandersSanders and polishersPolishers require up to 10 or more CFM and 100 to 120 PSI. Business Use: Air compressors used for business/professional applications are often classified “industrial grade.” They're packed with features that let you take on more demanding jobs with more horsepower, more CFM, more PSI and more (longer) run times. Though some industrial-grade compressors are portable, many are stationary units with large-capacity, ASME certified air tanks (up to 120 gallons), greater HP, more CFM air volume and faster recovery time to run a wide variety of air tools for as long as you need them to do the job.