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Hi Guys

I recently asked a question about finishing with Aerosols and from the responses I got I have decided to try spraying my finishes.

I already have this compressor but I wanted your advice as to whether it is suitable for spray finishing?? I will probably start with 'Rockhard' and then move on to 'nitro'.

The specs are : rotational speed.........................2850 rpm
max pressure.............................8 bar
air displacement.........................7 cu ft/min
electric motor............................1.5hp
receiver....................................24 ltr
cylinder head bolt torque setting...8.8nm (6.5lbf ft)

I have absolutely no idea what any of that means

Many thanks for your help.

Mat

It should be fine for spraying a single guitar at a time. If you tried spraying continuously, either spraying several guitars at once, or something larger it would build up alot of heat by running all the time, causing excessive moisture buildup.

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I didn't mean to say it, but I meant what I said.
http://www.brackettinstruments.com/

It is a higher capacity unit that I use at this time and it has so far sprayed 5 guitars and since I only use it for spraying and it does not run for long period of time. Get a good water trap and filter for it and enjoy. A higher capacity compressor is on my wish list but since the old one is surviving other tools are above it.

Fred

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Fred Tellier
http://www.fetellierguitars.com
Facebook page http://www.facebook.com/pages/FE-Tellier-Guitars/163451547003866

I have a compressor like this for spraying guitars. As long as you do one guitar at a time you're fine.

_________________
Cat-gut strings are made from kitten guts, stretched out to near breaking point and then hardened with grue saliva. As a result these give a feeling of Pain and anguish whenever played, and often end up playing themselves backwards as part of satanic rituals.

Typhoon Guitars
http://www.typhoon-guitars.com

Any compressor can get water contamination from condensation. I suggest you use a water filter or separator. They are not that expensive and can save you much frustration.http://www.grizzlyindustrial.com/produc ... lter/G6261
You should be able to find them locally. I use a water and oil filter.
That compressor should be more than what you need. What happens as you spray the compressor runs and builds heat. As the air heats up it will release water vapor and this will condense . The filer will take care of that . If you don't you can get blushing in the finish
john hall

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John Hall
blues creek guitars
Authorized CF Martin Repair
Co President of ASIA
You Don't know what you don't know until you know it

Thanks for the help and advice

If you are using nitro or any other flammable finish, make sure you unplug the compressor while spraying (or put the unit out of the area). I have a 60 gallon Kobalt that I bought off CL. Brand new. Nice thing about it is I can pump up to 50 psi and have plenty of air for a coat. But also, I am not using flammables.

You will be suprized by what is out there if you look. I searched about one month before I found a big tank compressor (at the same price you will pay for new, smaller ones). The bigger ones will tend to have inter-coolers too.

Mike

what you need to know (and you gave the 'answer') is the cubic feet/min that the compressor puts out @ 40 psi...your figures state 7 cu. ft./min, but don't include the applicable psi,but I'm guessing with a number that high for a 1.5 hp compressor it is @ ~40 psi...from looking at the picture it appears as if the unit is screw driven, which to me means that output specification is probably a tad high for real world usage....I think that using a gravity feed gun (HVLP I assume) and a smaller air nozzle you should be OK, but on the limits....

as I noted, it appears from the picture as if the unit is screw driven, which means its oil less and you won't need an oil trap, though you WILL need a moisture trap...if you find yourself running the compressor much while spraying you will probably need to set up a proper spray system, which is at least 25' (3/8")of hose to your moisture trap (going up on the air for most of it's length then down to the trap), then run your gun's air hose (5/16" minimum and preferably 3/8") from that...why?, because you need that amount of line to let the air cool down and condense, otherwise the moisture will not be properly trapped by the filter ( a REAL spray system would have 25' of iron pipe....you can also hook up a dessicant filter at your gun for a final removal of moisture (and oil too boot)...the dessicant filter should be hooked up to a pressure pot's inlet if you go that route (as you don't want any stray moisture being fed into the fluid container)...assuming you are spraying one guitar at a time I would think that a gravity feed gun would be the route to follow...

You didn't list how many gallons the tank is. I think a large size is important. i have a little 1.5 gallon tank compressor and it runs out of air very quick. Its perfect for an airbrush and my finish nailer but with a regular air gun it runs out fast.

It says 24 liter which is about 5 gallon. They do not go by gallon in other parts of the world.

_________________
Cat-gut strings are made from kitten guts, stretched out to near breaking point and then hardened with grue saliva. As a result these give a feeling of Pain and anguish whenever played, and often end up playing themselves backwards as part of satanic rituals.

Typhoon Guitars
http://www.typhoon-guitars.com