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Double nail - Air Tools & Compressors

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Possibly the trigger valve

Posted on Apr 27, 2014

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Posted on Jan 02, 2017

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DOUBLEFIRINF AND JAMMING. DONT HAVE A MANUEL SO NEED TO KNOW WHAT NAIL TO USE AND THE ANGLE


Double fire is usually caused by trying to use a bump fire trigger system as single fire (place on work then pull trigger). If however the gun double fires when bump firing, replace the trigger valve. Some nailers have the ability to select bump or single fire. The selector for bump or single fire is usually on the trigger or just above or below the safety actuator. Other brands offer different triggers available as a part number.
When trying to determine what nail to use, look for the model number of the nailer. Letters associated with the model number will give you a clue. Example; the letters RN in the model number indicates Round head Nail. The angle of the nail is easy to determine. Just measure the angle formed by the path of the driver and any straight line of the rails.

Apr 11, 2015 | Air Tools & Compressors

1 Answer

My gun has always from day one punches out 2 nail and jams up or not, is there an adjust ment for this problem


Nailers will double fire or at times, the driver will hit two nails with one stroke. The first issue is caused by sensitive trigger or worn orings and the second problem is caused by faulty nails (too close together in strip ) or the driver is bent slightly allowing the driver to strike the head of the second nail in line. One way to prevent double fire is to use the single trip trigger (usually white plastic). With this trigger, you must lift the gun off the work, release the trigger and press the gun against the work and pull the trigger. If you are using the black bump fire trigger and it double fires, replace the trigger valve. The issue of the driver blade hitting two nails with one stroke can be solved by examining the driver blale for damage. The blade should have a taper on the side that faces the nails. This taper is there so that as the driver hits the first nail the taper will gently push the rest of the nails slightly into the rails out of the way. If generic nails are used, make sure that the nails are designed with the proper spacing and angle. Easy test. With the gun on its side, place a strip of nails on top of the rails with the heads aligned with the angle of the rails. Move the strip of nails so that the first nail is in the path of the driver and the heads are still aligned with the rails. The first nail should align perfectly with the angle and path of the driver. If the head of first nail is in the path of the driver however the shaft of the nail is angled toward the rails, the driver blade may hit two nails. If the point of the first nail is in the path of the driver and the head is angled back toward the rails, you may have miss fire. If the nails are perfectly aligned with the rails and the path of the driver and the driver is hitting the second nail, grind more taper at the bottom inch of the driver. Good luck

Oct 14, 2011 | Stanley Bostitch N88rh Framing Nailer...

1 Answer

Shooting two nails at once


Problem of double fire is very common with nailers (the gun very quickly fires twice), however two nails at once can only happen if the wrong gauge nails are used in the gun. A 15 g nailer can very easily pass two 18 g nails or, with more difficulty, pass two 16g nails. To help prevent the driver blade from hitting two nail heads at once, most drivers are slightly tapered at the tip so that the driver will hit the first nail and the tapered part will push the other nails back into the rails slightly. Remove the head of the nailer and pull out the driver. Measure or compare the thickness of the driver to the thickness of the nails. If you are using 15 gauge nails, check the driver for taper. The tapered part should face the rails. If not tapered, try carefully grinding a taper keeping the tip cool so that you do not loose the hardness. You could also check for other brands of 15 g nails. There is a big difference in quality among brands of nails. Good luck with your repair.

May 31, 2011 | Porter Cable FactoryReconditioned DA250BR...

1 Answer

2 nails shoot at the same time


It could be just from using poorly clipped or collated nails. I have noticed that with some cheaper nails, the clipped heads are not all lined up properly. If a nail has rotated slightly during the collation proccess, the unclipped portion of the nail head protrudes over the previous nail in the clip. This causes the heads of two nails to be struck at once. Another problem I've encountered is collation wire that doesn't shear off with each nail. An ever lengthening strand of wire protrudes into the nail chamber and eventually the driver snags this wire as it drives a nail. This jerks the clip forward forcefully forcing more than one nail into the chamber or causing the next nails in line to rotate slightly, thus exposing the unclipped portion of the nail heads to the driver.

Mar 13, 2010 | Tools & Hardware - Others

1 Answer

It is shooting 2 brad nails at a time - is there some type of adjustment?


the first thing that i look at when a gun is double shooting is the nails. if i have the right nails then i check the driver( part of the gun that hits the nail) if the driver is fine( not bent or broken or worn) then your nose( chamber that holds the nail right before being shot out) is worn or broken. either way to answer your question , no , double shooting is not only dangerous but a complete waste of time, ps rate , tks

Feb 15, 2010 | Air Tools & Compressors

1 Answer

Shooting two nails instead of one


i would double check the plunger to make sure its resetting after each fire.

Oct 30, 2009 | Senco FP18 FinishPro 18 - Gauge Brad...

1 Answer

Nail gun- double feed


Nail guns either have a switch or a seperate trigger assembly for two options - automatic, or 'bump' fire, and sequential fire. Sequential firing may be best for you since the nose must be fully depressed and the trigger pulled for each nail.

If you're stuck with bump firing, practice your technique. Double fires often occur when the workpiece bounces back into the nose of the gun; learn to 'bounce' the gun off the material to avoid this second contact.

If you're getting double fires in sequential mode, the problem could be more serious. I keep a can of aerosol silicone lubricant on hand to clean and lubricate the feed mechanism and magazine. Make sure your tool is clean and lubricated before each use, including the 3-5 drops on the air coupling.

Check that your air pressure is not set too high. Overdriving nails reduces their effectiveness and can cause tool malfunction.

This problem could also be caused by worn out O-rings or other parts within the tool. If you're not comfortable servicing the tool yourself, take it in for repair/maintenance work.

Another important thing to remember: With tools like this, you get what you pay for. A cheap nailgun will never function as well as a quality nailgun.

Oct 14, 2009 | Tools & Hardware - Others

3 Answers

My bostitch rn46 seems to double or triple shoot nails frequently. Am I not using the tool properly or could there be a mechanical problem with the tool?


if u are right nails for gun,then make sure when u put coil in and feed in front of firing pin the nails are straight with pin and connecting wires are not bent causing nails to fall out of alingnment.

Oct 02, 2009 | Stanley Factory Reconditioned Bostitch...

1 Answer

Cambell-hausfeld framer


its double firing, after firing gun pull back, what is happening is when you fire a nail your pushing the gun back onto the wood and its putting another nail in

May 08, 2009 | Campbell Hausfeld 2" 18GA Brad Nailer

3 Answers

Senco 600 framing nailer / double hitting(nailing)


double nailing is usually caused when you apply to much pressure on gun causing it to fire on the recoil lighten up just tap it on the surface to be nailed

Apr 18, 2009 | Tools & Hardware - Others

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