Question about Craftsman Air Tools & Compressors
Your compressor is to small
Posted on Jul 25, 2017
Pneumatic tools are rated in cfm (cubic feet per minute). Your 1 HP air compressor is rated at probably not more than 3 cfm while the 1/2 " impact driver needs at least 8 cfm, maybe 12 chm of air.
The compressor must provide more chm than tool rating needs.
It is a problem, by the time you look at five horse power air compressors and larger, a lot of electric power is needed. A circuit of 220 volts, 20, 30, or more amps would be required to run those large expensive compressors.
If you can, return the air tool and get a good electric tool instead.
Leave those high air volume air tools to shops that are so equipped to use, or invest if you must.
Posted on Jul 25, 2017
After buying an air compressor there are some issues that should be taken care of. This page has only discussed the proper guideline of using an air compressor. I hope you will find your answer.
Posted on Apr 18, 2019
You don't have enough air pressure,use your lug wrench.
Posted on Jul 24, 2017
The compressor tank has to be ten gallon or better
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Posted on Jul 24, 2017
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Posted on Jan 02, 2017
It sounds like you may have a broken reed on the diaphragm plate. This is located at the block. Remove the cover, and look for a cast metal assembly with fins. It will be attached to the side.
Posted on Apr 23, 2009
Make sure you have at least 90 pounds of air and if you do you need to oil the wrench air tool oil pour some in the where the air line hooks up ..air tools need to be oiled daily cause compressed air cause water vapors to build up when you use it and then when it sits it begins to rust a bit and the oil stops this ...
Posted on Nov 17, 2009
Tips for a great answer:
May 30, 2014 | Chicago Pneumatic 1/2" Air Impact Wrench
Mar 28, 2011 | Ingersoll Rand Air Tools & Compressors
Air Tool consumptions are based on 15 seconds per minute (25%) of tool use.
Usage rates refer to the total time that air is flowing through the tool. If your applications result in more extensive usage, calculate air tool requirements as
(25%) 15 seconds = rated scfm x 1
(50%) 30 seconds = rated scfm x 2
(75%) 45 seconds = rated scfm x 3
(100%) 60 seconds = rated scfm x 4
Your impact wrench is rated a 8 CFM Cubic Feet Per Minute Usage
SCFM is Standard Cubic Feet per Minute (pre-compressed air volume)
I would be more concerned that the plumbing from the compressor tank could support the 8 CFM required by the 1/2" Impact. Remember the Air compressor will recover the pressure loss regardless of size. The only problem your going to have for "small jobs" is if you use too small of an air line to supply the impact wrench you are not going to get the full torque that it will produce to the drive head. In other words... a 1/4" supply line or 1/4 fittings anywhere in the system just isn't going to cut it even at 120 PSI. If you have the patience... a 5 gallon tank compressor that has the output volume required should be all that you need. I have been a mechanic over 4 decades and rarely have to use a 1/2 in impact for very long. Examples of 1/2" vs 3/8" useage. Wheel nuts, crankshaft pulley center bolt, some starters, steering, suspension and rear end parts. Other than that a 3/8" Impact works great.
One other thing you can do if you have an Air-Peen portable tank (with added fittings) is to add that in line with your output hose when your using the impact wrench so that you have longer use times.
I know this does not answer your what SCFM compressor is required question but it will resolve your needs. I just can't see telling someone that is a "small jobs" user to buy a larger compressor when really all they need is more volume for a brief period of time. The re-plumbed 1/2 inch output / in-line Air-Peen tank is a much cheaper and reasonable work around and you can disconnect that tank when your not using the impact wrench.
Lastly... if your inpact wrench has a SMALL male air fitting everything above will be a waste of time. You have to get that volume into the tool without restriction so that the rool will work properly for you.
Thanks for choosing FixYa.
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