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Old 11-29-2007, 04:18 PM
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Harbor Freight Gun Adjustment

I have a harbor freight gun that I have an adjustment question on.

How do I adjust the airscrew at the base of the handle?
Online I found "turn it until the air volume stays the same". I am not sure what that means.
Do I adjust that screw then set the air pressure with the regulator (at the base of the gun?

Also, I have the Harbor Freight regulator. Does the arrow on the back of it point toward the gun or toward the compressor?
I thought I knew the answer but the package said the oppostire of what I expected.
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Old 11-29-2007, 06:07 PM
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Is this a paint gun? Sandblasting gun? Undercoating gun? Nail gun?

Brian
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Old 11-29-2007, 06:33 PM
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Hvlp

Oops
it's their HVLP paint gun.

Not if it makes a difference but it is model H827W
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Old 11-30-2007, 06:28 AM
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I do not believe the H827W is a true HVLP gun. The 43430 is HF's HVLP gun of choice IMO.

Vince
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Old 11-30-2007, 07:16 AM
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Can't help on actual psi settings but the arrow is air flow DIRECTION which would be INTO the gun,The air adjust knob on the bottom is usually backed out,wide open unless your painting something small. The purple hvlp usually runs around 45 on the regulator guage with the trigger fully pulled back.
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Old 11-30-2007, 08:26 AM
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Quote:
Originally Posted by 302 Z28
I do not believe the H827W is a true HVLP gun. The 43430 is HF's HVLP gun of choice IMO.

Vince
I was taken on one of these guns, I don't know why they can call this an hvlp. .
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Old 11-30-2007, 08:30 AM
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Gun confusion

Thanks for the tip. I will try it out today.


I looked at the gun online. It was gravity feed. I just ran to the store and swapped it out. The HVLP gun is on sale for $19.


I ordered my first gun on ebay as an HVLP kit. It turned out to be from Cal-Hawk but the handle was stamped with the same number at the gravity feed gun from harbor freight. I actually bought the HF gun because I tore the seal on the first one.

To make a long story short, does that mean my first gun was not HVLP if it was stamped with the same model number as the HF gravity feed gun?

How will the HVLP gun be different?
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Old 11-30-2007, 09:20 AM
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Quote:
Originally Posted by kaw550

How will the HVLP gun be different?
The H827W and the 43430 gun look the same. The 43430 gun will not have the H827 on the side. I have used the 43430 gun extensivly and can assure you it is HVLP. I was also taken online by the H827 being advertised as an HVLP gun when it is not.

Vince
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Old 11-30-2007, 10:16 AM
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Here's a Link to a write-up on adjustment of the HF 43430 gun. I've got two of these.
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Old 12-01-2007, 07:08 AM
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So now that we estabiseded that my last gun was not hvlp, what can I expect from the hvlp gun?

Will I notice less overspray?
Will it apply paint differently?

Will it need more or less air?

I had no problems the last time around. I wasnt sure if I should expect any with this gun.
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Old 12-01-2007, 01:01 PM
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I sometimes think if there's a difference between cheap chinese products it might be that they're made in different provinces of china where those school girls are up there getting $4.50 a month.

When it says precision on chinese products like lathes or mills, I think precision means the truck driver takes the same road between the foundry and the shipping port each time.
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Old 12-01-2007, 03:17 PM
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The HF 43430 "purple gun" works just fine but..... and there are always a few but (butts?)

They are air hogs. The instructions say 23# at the inlet. Wrong. Depending on what you are spraying, 45 to 60 psig is closer to the real figure along with the corresponding air volume.

With the high inlet pressure, be prepared for a LOT of overspray....on everything. My shop has gray in places that for sure aren't supposed to be that color.

Economics - you end up with the costs of more paint. If it's overspray, it isn't going on what you are painting.

As a note - last week I happened to see a Spike Network show, Truck U where they were using an Iwata 400LPV gun. The host said you need 20psig inlet pressure for that gun. He was wrong. The instructions specifically say 14 - 16 psig. From experience, I've gone as low as 10psig inlet pressure with my DuPont ChromaBase -- minimal overspray and great atomization and coverage.

So, with that said, there are better choices then the HF 43430, but it will do an acceptable job knowing the gun's limitations.

Dave
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Old 12-01-2007, 09:40 PM
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I've said it before,The HF guns are Sata knockoff's. The HVLP purple gun is a Jet 90. I have a newer Jet-90 RP and it's almost a carbon copy, Only difference is it sprays at 46# instead of 50 or more and sprays base like perfect but you end up using more paint due to the waste. HVLP my butt, The purple gun is a "compliant" gun at best. I have the purple touch up hvlp and it's a direct copy of Sata's Minijet 3. I know because I have a 3. Only difference is the air cap which the HF only has 1 hole per horn vs Sata which has 2, AND, The Sata air cap will screw right on the HF mini.
Now,
Dave, Ive done extensive study with a LPH-400 LV with an air cap.
Depending on your air supply,regulator,filter, Setting it at the recommended is NOT a guarantee of 10 at the cap. Due to the fact of using the Devilbiss bulb filter AT the gun inlet, I have to run 20# to get my 10 at the cap.I still can't believe I'm losing that much cfm thru that filter,but the guage don't lie.
As long as your getting enough air to atomize the paint,screw it.
Some run 20# with the purple air cap,which recomends more like 8-10.
I "try" to use guns as they are intended but depending on your AIR set up, things may be a little different to achieve desired results.
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Old 12-02-2007, 05:40 AM
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Quote:
Originally Posted by Bee4Me
Now,
Dave, Ive done extensive study with a LPH-400 LV with an air cap.
Depending on your air supply,regulator,filter, Setting it at the recommended is NOT a guarantee of 10 at the cap. Due to the fact of using the Devilbiss bulb filter AT the gun inlet,.............Some run 20# with the purple air cap,which recomends more like 8-10.
I "try" to use guns as they are intended but depending on your AIR set up, things may be a little different to achieve desired results.

Ya got me with the air cap - haven't "invested" in one. Like you say, start with the owner's manual and work from there. They're just like a woman, no two alike . At the recommended 16psig, I just blast too much overspray and end up drooling the paint down a panel so I normally set the gun at 14# to start with. I play with fire - and don't use the last chance bulb air dryer thogh have one and have tried it - and find that the gun become awkward. So far - no problems. Possibly I haven't completely converted my mind to the fact that it's an HVLP, not the siphon feeds that I used until my current stable of guns.
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