Staple gun I have is leaking air ?

by Doug
(Eugene, Oregon)

Duo Fast Staple Gun

Duo Fast Staple Gun

The duo-fast staple gun I have is leaking air through the hole that the staples come out.


It is NOT shooting staples, just continuous air.

What's wrong with it? It is a Duo-fast staple gun, a heavy duty one! The air is just streaming out of the hole that staples should come out. Nothing happens when I pull the trigger or bump the nose onto the work bench.
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Doug, sounds like a seal has gone. I suspect that it's had more than a bit of use, based on the photo. (Thanks for that), though I cannot tell the model from the photo.

There are some "O" rings that might be the problem. Spares are available from ITW,

*12 092729 1 O-Ring, Lower Valve Piston
*13 004163 1 O-Ring, Lower Valve Piston
*14 402974 1 O-Ring, Lower Valve Piston

Go here: www.itwindfast.com and follow the links to your model where you can find the parts schematic.

Cheers,

Bill

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Staple depth adjustment?

by Robert
(Vancouve Island BC Canada)

Adjust the depth of a staple by using a combo nailer stapler gun.

I have a Campbell Hausfeld Compressor, 3 year old model, and a combo nailer and stapler.

I am unable to adjust the depth of the staples. At present, the staples are entering the wood almost 1/8 of an inch below the surface.

Suggestions on adjusting this would be appreciated.
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Hi Robert, and hello to beautiful Vancouver Island.

If your stapler is driving the staples too far into the wood, then the force of the staple gun could be too high.

How do you adjust the force of the staple Gun. Typically there's an adjustment on your gun that will allow you to mechanically adjust the stroke depth, often somewhere near the trigger?

Failing that, you may be able to adjust the depth by adjusting the air pressure to the staple gun.

Your compressor should have a regulator on the discharge line. Your setup will also likely have two air gauges.

One compressed air gauge shows the pressure in the tank, and the other (usually closest to where the air discharges to the air hose coupling or right on the regulator itself) will show what the downstream pressure is set at. The downstream pressure is the air pressure that your staple gun will receive through the air line.

What's that pressure setting of that downstream side air regulator?

You turn the knob on the regulator to either increase or reduce the downstream air pressure to your air tool.

In your case, you want to lower the air pressure to your stapler. Reduce the air pressure until the staple seats to the level you wish.

Careful you don't set the pressure too low so the staples don't seat all the way, or below the MOP (minimum operating pressure) of the staple gun.

See the REGULATORS page on this site for more information on compressed air regulators.

Cheers,

Bill

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Construction site - framing nailers air supply.

by Caleb
(Canada)

Air supply on a construction site - framing nailers.

I have two 7cfm compressors running together to feed about 10 framing nailers. From the compressor i go through a air drying system (to eliminate freezing in subzero temps), then through 200'-300' of 3/8 hose to a 30 gallon pig tank which has a 10 coupler manifold built on to it. Then each gun has 100'-300' of hose feeding them. The compressors regulators are set at 130 psi but the guns still have a hard time sinking the nails. Especially when shooting rapidly. How could I fix this problem?
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Caleb,

Double the size of the air pig and increase the the manifold / lines to the framing nailers to reduce pressure drop.

If that doesn't speed them enough, move the air pig closer to the nailers (shorter hoses) to improve performance.

Cheers,

Bill

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How to spray a multispeck paint?

by Lazarus
(Toronto Canada)

The paint company is asking to use a compressor with a 6.9 cfm rating at 100 psi to spray their paint.

They also require specific air gun and needle.

The paint will be sprayed from a pressure pot having a separate pressure for the paint and for the air to the gun. Maximum pressure is 50-60 psi for fluid @ 6.9 cfm and 40-50 psi @ 6.9 cfm for air.

Question 1 what rating in cfm does the compressor need to be to pressurize both air and fluid eg 6.9 @ 40psi Or 6.9 @ 100 psi

2) can two compressors be used, one for fluid and one for air if compressor of 6.9 cfm is unavailable

3) can a compressor of let say 4.3 cfm @ 90 pounds be used and if so will the application be done but at a slower rate?
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Hi Lazarus...

Regarding question 1 - for sake of simplicity, let's agree that you need 60 PSI for both applications? Therefore, to be safe, you will need a compressor that will generate about 14 CFM of compressed air at 60 PSI.

2) I can see no reason why you could not use two compressors, regulated to the correct pressure, to supply the pot and the gun. As long as sufficient flow and pressure is arriving at each in a timely manner, the pot and the spray gun shouldn't care if the air is from one tank or two or one compressor or two.

3) Possibly, the but the math to determine that is your problem, not mine. :-) See the calculating CFM link on the Sitemap page under CFM / SCFM / Flow / Pressure Issues.

Cheers,

Bill

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