Why does it fire two nails constantly? - Air Tools & Compressors

It appears to be a known issue

FinishPro® 18Mg - Senco

https://www.senco.com > docs > manuals-and-parts-charts

PDF FinishPro® 18Mg. 18 Ga. Brad Nailer. NFD81UMG Revised Mar. 11, 2014 (Replaces ... Fire." B First, ? pull trigger, then. ? push safety element against work surface for operation each time ... ? Double Action et ? Restriction. Dans certaines ...

FAQs ' SENCO

https://www.senco.com > faqs

A Restrictive Trigger tool will reduce the possibility of double fire and may reduce the speed of operation compared to a Dual Action Trigger tool. Call Customer ...

SOLVED: Shooting two nails instead of one - Fixya

https://www.fixya.com > support > t3317376-shooting_...

Question about Senco FP18 FinishPro 18 - Gauge Brad Nailer, 5/8" - 2" ... I would double check the plunger to make sure its resetting after each fire. Helpful 0 ...

nailer double nailing - Fine Homebuilding

https://www.finehomebuilding.com > forum > nailer-do...

Oct. 25, 2003 - I have a brand new bostich framing nailer and it is constantly double nailing and getting jammed. ... consider the senco framer I recently saw packaged with an 18 gage stapler for only $199 at Lowes. ... You can make the best of nailers double fire. ... Podcast 331: PRO TALK With Cabinetmaker Ben Scott ...

insure that there is no debris ie., free from filings from the nails used or or ceck the feeder ports where the nail enters before it lives the port ( check for damage orifice or abstractions to it

is this a gas cartridge type of nailer? It could be the effects of gravity on the spray nozzle. try pushing down in normal position but dont fire it. quickly move to ceiling then try firing. I am not a fan of this type of nailer as they are problematic and finicky.

If gun firing but nails not being driven could be one of two basic problems:
1. Nail jammed in magazine not allowing nails to move up.
Empty magazine, does follower move to top of magazine. Push gun against work piece, does fan motor start? Yes - jam in magazine or lock out bar not operating. (this would allow nail un to fire when out of nails)
2. Piston/driver not returning fully after firing, hence driver blade on top of next nail instead of behind it. This could again be caused by a jammed nail or just a nail head. Another case of not returning is the combustion chamber not making a good seal, check O rings on framer (they are steel rings on bradders) it may just need a good clean it is surprising how dirty they can get and if not cleaned a build up of dirt could break a seal. If not been cleaned for a long time worth checking piston rings, worst case scenario dirt builds up around the rings and stick fully in requiring new piston if the rings will not come out.
Nail guns work on the principle that an explosion pushes the piston driver forcing a nail into the work piece, after the explosion a vacuum is created and it is this that 'sucks' the piston/driver back up the cylinder.

First, check that you are using the proper nails. The FP602 needs Full Round Head nails with plastic collation. If you are using Clipped Head nails with the paper tape collation the angle of the nails not let the driver catch the next nail and drive it into your work.
If you have the correct nails, check the magazine to make sure the nails are feeding all the way up to the driver. If there is anything blocking the way or if the spring on the feeder isn't taught enough to pull the clip all the way up the driver won't be able to catch the next nail and drive it in.

could be a jammed nail in the nose assembly, try removing all the nails and dry firing. If still the same after making sure nothing stuck in the nose, you probably have an issue with the firing valve or piston.

There are two issues that people have with nailers that sound the same however are totally different. Firing more that one nail at a time can be taken as; two nails being driven with one fire or the nailer vary rapidly firing a second time almost instantly after firing the first nail and each time only drive one nail. Problem of double fire (either type) 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 nail head. If you are sure that 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 effect the hardness. You could also check for other brands of 15 g nails with slightly more spacing between the nails. There is a big difference in quality among brands of nails. Good luck with your repair

Professional-grade varieties are automatic, and fire a nail directly upon pulling the trigger. A semi-automatic nail gun is more appropriate for beginners, since it requires a two step process: pull the trigger and then tap the barrel against the wood. This safety feature protects the user from accidentally firing a nail gun and injuring himself or others.

Professional-grade varieties are automatic, and fire a nail directly upon pulling the trigger. A semi-automatic nail gun is more appropriate for beginners, since it requires a two step process: pull the trigger and then tap the barrel against the wood. This safety feature protects the user from accidentally firing a nail gun and injuring himself or others.