Question about Air Impact Wrenches

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How many cfm do i need to break 100 ft lbs with a 1/2 in wrench?

There is a small regulator output to 3/8 id hose

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Set the regulator at 90 psi, that is the recommended pressure for most 1/2 inch guns. the guns effectiveness peaks around 90 psi. more than that could damage the gun. mike

Posted on Jan 04, 2009

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Kobalt 350 impact runs without trigger pressed


Sounds like a problem with the throttle valve.
you will have to remove the air inlet (item# E) then pull the spring out (item# 37) and look to see if you find any foreign objects, if not the proceed to pull the throttle valve (pin cover) (item# 37) and check the seal (item# 34) for wear.
Follow this link for the parts manual:
http://pdf.lowes.com/useandcareguides/879686002796_use.pdf

Dec 31, 2013 | Kobalt 350 ft-lbs Air Impact Wrench...

1 Answer

What the maximum working torque for a Ingersoll Rand 1/2 2705P1?


Ingersoll Rand 2705P1 1/2 inch 40-200 ft lb Industrial Duty Impact Wrench
Max Torque 400 Ft-Lb

Pneumatic Impact Wrench, Industrial Duty
Pistol Grip Style
Standard Anvil
Square Drive Size 1/2 In
Torque Range 40-200 Ft-Lb
Max Torque 400 Ft-Lb
Average CFM @ 15 Second Run Time 4.2
CFM @ Full Load 23
Max Bolt Capacity 5/8 In
Free Speed 8500 RPM
Pin Retainer Type
Required Pressure 90 PSI
Air Inlet 1/4 In
Min Hose 3/8 In
Overall Length 6 3/4 In
Weight 2.55 Lbs
Country of Origin: USA
CR 4Z942

Mar 28, 2011 | Ingersoll Rand Air Impact Wrenches

1 Answer

Im going to buy a compressor ! What is the min scfm comp that will run this tool for small jobs on my car?


Hi and welcome to FixYa, I am Kelly.

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

follows.


(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.
Kelly

Mar 09, 2011 | DeVilbiss Excell ET501 12" Impact Wrench

1 Answer

My air impact runs without squeezing the trigger.


if u take the tail outa ur gun u will see that da gause filter inside has broke up.it gone inside and holding da valve open pick it out wit a seal pick r somethin

May 27, 2010 | Ingersoll Rand Air Impact Wrench 1/2in....

2 Answers

Dont know where to put oil in Craftsman 1/2 " Impact wrench


I just bought one of these also. Manual says oil goes into "the air inlet" which I'm thinking is where you attach the hose. That way the oil is sprayed throughout the interior of the gun once you run air through it.
Question for you: I can't get an impact socket onto this gun, almost seems like the square hole is too small. (yes, both are 1/2" drive). How do you get a socket on this stupid thing?
(man that sounds like I'm an idiot, but I've spent a half hour leaning all my body wight, wiggling, etc. and can't get a damn socket on)

Apr 29, 2010 | Craftsman 1/2" Impact Wrench

1 Answer

My Aircat 1404BG impact gun stopped working.


most of the problems accure from being dry try 2 or 3 drops through the air intake fitting every so often depening how much you use your air tools, it may be time for a new one but i would try the air tool oil first before bying a new one, i hope i helped.

Jan 02, 2010 | Impact Aircat AC1603 3/4" 1330 Ft - Lbs...

1 Answer

Loaned impact wrench tried to use after returned will not stop rotating unless air is unplugged


typical ---get it serviced there is small platic type o/ring on trigger in the handle that gets brittle and breaks up,mine went just after easter ..make sure ,when fixed to add a few drops of transmission fluid to th e air inlet every time you useit

Jul 28, 2009 | Chicago Pneumatic 1/2" Air Impact Wrench

2 Answers

1/2 air impact wrench will not turn socket. Air just comes out the small vents on the bottom of the handle. Any suggestions?


Make sure the fitting are tight on the hose and gun. Also make sure that the switch for forward/reverse is solidly in one position, if it is not it will cause what you described.

Jul 09, 2009 | Craftsman Tools 1/2" Air Impact Wrench...

1 Answer

Wrench Troubleshooting


In line oiler Lubrication is critical to extending the life of your valuable air impact wrench and increase productivity. An air tool that has not been properly lubricated will result in low power output. The usual culprit is a dry motor starving for some oil. Your impact wrench is an expensive investment and you must take the time to properly lubricate it. The easiest and quickest way to make surein line oiler it is constantly lubricated is to install an in line oil lubricator. One of these will insure your air tools are receiving oil every time they are used. In line lubricators attach right into the air hose and you fill them with the correct lubricating oil. (see your manufacturer's specs.). You should also do routine external lubrication through the hammer case grease fitting. A well lubricated air impact wrench will deliver more torque, last longer, run quieter and increase productivity. Don't forget to add an in line oiler to your next impact wrench or air tool. It will pay for itself several times over.

Aug 27, 2008 | Impact Aircat AC1603 3/4" 1330 Ft - Lbs...

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