Air compressor with finish nailer, drop in regulated pressure

40m is a long hose for a little compressor, what type of gun are you running on it, Finish gun or framing gun, these compressors are not suitable for framing guns, they can't handle the amount of air required.

I would be first checking for small leaks on all your joins, shorten the hose, cant see why you need 40m for home use, longest hose I have is 20m, never had a need for any longer 1/4 hose is also small, my ones are all 3/8., I have a small Maxus compressor for little things, it works perfectly well with my finish guns and staplers, but would not bother putting the framing gun on it, I have a bigger compressor for that.

You can also adjust at what pressure the compressor cuts in, you may need to adjust this to cut in quicker.

My Hitachi finish and coil nailers run from 70-120 (Manufacture Specs), I have them set around 100-110 without any problems.

Originally Posted by s3rialthriller

Running a little senco 18ga forgot to add

How many shots you doing before it drops ?

Also yes a water trap is a good idea, or that water will end up in the gun, they don;t tend to like that long term.

Don;t forget to feed the gun a few drops of oil before every use, and half daily if using all day.

I have a little direct drive compressor I use for the nail guns if I am doing something away from the workshop.
It's a cheap GMC with a 50l tank and 6 CFM pump bought many years ago for $99 and I can't kill it.

The only thing I had to do in order to use it with the framing gun was replace the regulator that only allows for maximum pressure to be changed for another regulator that cost me as much as the compressor, that allows to change the cut in pressure as well as the cut out pressure. With the old regulator, since the differential was 40 PSI, I had to crank the top cut out pressure past 120 PSI in order to get it to cut in at 85. Not good.
So now I can lift the cut in pressure to 95 yet keep the cut out pressure at 110 and the framer pushes in 90 mm nails and even ring shank nails with no problem.

Correct description is a pressure switch with adjustable differential.

Originally Posted by s3rialthriller

Maybe 3 or 4. Is it normal for regulated pressure to drop or should be constant? I've never thought you had to go and change it up every few shots.
Senco say that they are oil free and have a no oil sign so what's your take on that?

3-4 shots is not enough, I would get 15-20 shots with my finish gun using the small Maxus compressor before it cuts in, and the last nails would still be driven all the way.
My mate has a small Project Air compressor, have used it to do a fence once with him, the coil gun uses more air per hit, and it would get at least 10-15 shots before cutting in, the last two nails needed to be hit in by hand.

Start by decreasing the hose length, I bet that's causing you some issues, NO you should not need to readjust the pressure once initially set.

If the Senco says oil free, then don't oil it.

Is it the FinishPro18BMg ?, if so the operating pressure is from 70-120, dial it up to 100-110 and try it out.

If you increase the cut in pressure from 70 to 100, you increase the cut out pressure to 150 and that may not be safe.

Yep ... fitted by a repairer not by me.

Close it once drained any water

https://www.youtube.com/watch?v=KVP_A7eGYxw