Air Gun Purchase

Any questions about tools or supplies. Post your compressor/gun questions here.



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PostPosted: Sun Nov 17, 2019 9:27 pm
Starting a new tread here....looking for a gun using a 20 Gal 2 HP compressor. Compressor rated at 8.8 CFM @ 40 PSI or 7.4 CFM @ 90 PSI. I wanted to get the Iwata AZ# HTE 2 which runs at 7-7.5 CFM @ 29 PSI depending on the tip. Some people put the AZ3 in a LVLP category cause it does use low CFM's. Should I trash the idea and find a gun that runs at lower CFM. Sprayrit or others? I'll be spraying a bumper cover or a fender at a time ....not a whole car. Any suggestions...thanks V

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PostPosted: Mon Nov 18, 2019 2:43 pm
You can probably get away with one small panel at a time.
But remember, the compressor pump is replacing air in a tank that
is most likely more than 90 psi, so the cfm the pump is replacing will
be at a lower level than that 90 psi rating.
The higher the tank pressure ( resistance to the pump) the lower
the cfm from the pump.
So you'll be low on keeping up.
Also, if it's a low cfm gun, it probably will put out less paint and fan size
so it'll take longer to cover a panel, making the compressor run low.
You really need a larger compressor.
I used a conventional gun when I had only a small compressor.
They use less air.
A Bink 7 copy by Astro is under $100.00 and can spray at a lot lower psi
than they call for, I sprayed at 35psi and it did fine, I had a 3/4 hp compressor
and it kept up on a entire car I sprayed.
JC

(It's not custom painting-it's custom sanding)



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PostPosted: Mon Nov 18, 2019 4:14 pm
Went to astro site and all they're conventional guns are 8-12 more than the Iwata. Would adding a 10 gallon tank into the mix help?

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PostPosted: Mon Nov 18, 2019 5:23 pm
Okay, guns are like hollow car engines.....Compressors with decent tanks are the engine's displacement and the compressor is also the engine's horsepower.
Go with little tank size+ little horsepower= a darn near empty engine that wont' run right.
And I'll also say that.... I'd rather have a decent horsepower/tank compressor and a piece of crap gun for spraying than....a great expensive gun and that compressor you are trying to make work here..... And, no we are not picking on you here....many guys here have spent considerable time and money trying to "get by" with smaller compressors.
Metal, wood, fiberglass, we work it all... www.furniturephysicians.com We can restore the irreplaceable!



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PostPosted: Mon Nov 18, 2019 5:55 pm
The output on my compressor does say 7.4 CFM @ 90PSI. Is this accurate.....if so then I'm ok with Iwata (considering I'm doing panals....not the entire car). Correct?

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PostPosted: Tue Nov 19, 2019 8:57 am
vza wrote:Went to astro site and all they're conventional guns are 8-12 more than the Iwata. Would adding a 10 gallon tank into the mix help?


That 8 to 12 is at 60 psi, like I said, it sprays fine at 35 psi which drops
that cfm in half.
HVLP guns can't do that.
JC

(It's not custom painting-it's custom sanding)



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PostPosted: Tue Nov 19, 2019 10:38 am
Which astro gun is it exactly? Also have been hearing about the devilbiss sri pro that's rated at 4 cfm's is that a possibility? Not really bent on a hvlp gun just want one that would work w my compressor and do a good job. A larger comp w 220vac is not going to happen as I have no 220 serv in the garage. Thanks v

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PostPosted: Tue Nov 19, 2019 11:54 am
vza wrote:Which astro gun is it exactly?


It's the "Binks 7" copy. AS7SP
There are a lot of different brand copies out there.
I have one, it sprays really well.
Now that I have a larger compressor I use HVLP's but only
because they give less clouds and are easier to clean.
But that siphon feed is still the best for metal flake.
(not to be confused with metallic)

http://www.spraygunworld.com/products/A ... PAS7SP.htm
JC

(It's not custom painting-it's custom sanding)



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PostPosted: Sun Dec 01, 2019 10:20 am
I wound up going with a 'mini' gun. I picked up a Devilbiss SRI PRO(came with 1.0tip) cause it was rated at a lower CFM but now all of the base and CC say to spray with a 1.3tip. The largest tip the SRI accommodates I believe is a 1.2. What now. V

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