Cheap paint gun?

[jonnybox]

Want to get a cheap paint gun for putting on etch and high build primer, so far I've found the sealey gold series s701 and s701g (around 25 on the bay)

I've got a 50 ltr 3hp sealey compressor (SAC05030) which apparently has a 8.75cfm air dispacement, so this should be adequate.

My question is has anyone used these guns before and will my compressor handle be up to it, and if not can anyone recommend a gun to suit my comp.

Also everyone keeps telling me my comp won't power a DA sander but at 8cfm...why not??

 

[ajlelectronics]

Because displacement is less relevant. What you need to know is how much air is puts out. This is known as FAD (Free air delivery) and will be lower than the displacement.

 

[stormin]

The 8.75 CFM specified is the FAD or free air delivery of that compressor. It does seem quite low for a 3hp and it seems the outlet regulator may be the restriction. It may be worth buying a better filter regulator, and feeding it direct from the tank, bypassing the fitted unit.

You'll need a filter unit anyway for spraying.

I think other people have recommended the Sealey gun on here and I don't think you'll do much better for the price. It's available in quite a few different set-ups too, 1.6, 1.8 and 2.0mm so you should be able to find one to suit your compressor and intended spraying.

You may still struggle with the DA sander, the air consumption given is an average figure, if you keep the trigger fully open it'll draw far more air than that. You'll have to keep stopping to allow the compressor to keep up and you'll still be giving the thing a hard time. Depends on how much you want to use it.

 

[pedrobedro]

I used one of those guns on my SIP 3hp compressor which sounds about the same as your Sealey and it works fine. Your compressor will power a da sander but not for prolonged periods, you will be waiting for it to catch up with the air requirements all the time and get very frustrated due to the above mentioned FAD as the tool needs about 90psi constant and the pump cannot supply it.

 

[rikrobson]

cheap ones at lidl at the moment

 

[steveo3002]

what are you painting with it? would a mini gun do ?

 

[Chipper]

The gravity 701 is available in 1.4, 1.7 and 2.0, and they're very cheap setups. Gun should be less than £40. I use one for what you want to, i.e. primers / high-build, Jotun epoxy, and have sprayed rubber roofing paint as well. That comp puts out enough air for the gun. I'd run a line direct off the tank and have a reg as far away from the comp as practical.

 

[FranV8]

On compressors vs powering tools that require 90 psi to work - I was lucky when I bought my second hand that it's a 10 bar (150psi) machine - so as long as the capacity is thereabouts rarely does it drop to a level that would affect the tool.

I was looking around Machine Mart yesterday, and all the hobby stuff more or less is 8 bar, even ones using practically the same pump.

I guess my point is, if you're ever looking around for another compressor, worth comparing the pressure of the machine, the extra couple of bar I've found helpful.

On your machine - 8.75 FAD sounds spot on. I've found that using 1hp = 3cfm (FAD) to be pretty accurate for what is effectively a rule of thumb. This seems to hold true of belt vs direct drive machines too.

 

[jonnybox]

I forgot all about this thread!

thanks for the good info.

Im painting both sides of my car (fiesta xr2i) so quite a small car.

Just seen another hvlp sealey gun S741 but it has a 15cfm air consumption!

Lidls doing spray guns? is there anything they dont do?

Good tip about running a direct line straight from the tank, any idea what bits i will need to do that? I've got a seperate sealey filter / regulator £20 job so will that be ok? i might get a regulator to go on the bottom of the gun too.

 

[Chipper]

HVLP does mean high air consumption, even my mini took 9cfm.
Some cheapo guns are badged "HVLP" but aren't, presumably to make them more appealing.
The gold grav is fine for primers and hosing on high-build, doesn't need loads of air and the setups were £7 each when I got mine (few yrs back though). One advantage is you'll be able to get spares, where most no-name stuff is pretty chuckaway.

You'll need to undo the plug on the tank, which is probs fairly stiff / threadsealed. Then it depends on the thread size and preferences, I put male quick-releases on mine, you could have a ball valve and connector or whatever you fancy.

Could use a little gun-mounted regulator, mini-filter, or nothing at all. I got mini filters on some but they're always dry, so either they're crap or the reg/trap does it's job

 

[denisstark]

HVLP does mean high air consumption, even my mini took 9cfm.

actually hvlp means high volume, low pressure

 

[Chipper]

Oops, I meant the air use, not what the letters stood for, should've worded it better. Meant true HVLPs want more air than conventionals.