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Old 11-13-2007, 09:36 PM
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compressor question

Im looking at buying a spray gun wondering what size compressor I would need to run a spray gun and my cut of wheel? I have a simple 5 to 10 gallon 1hp now and it simply doesnt work well with the cut of wheel. I cant afford anything real expensive..any suggestions?
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Jason

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Old 11-13-2007, 10:44 PM
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You did'nt say what kind of spray gun, they can be anywhere from (on a full size gun) 4 or 5 CFM up to 15 to 16 CFM for a HVLP type, so we need more info on that. Most cut-off tools, as you have found, need quite a bit of air and most of the time a 4 1/2" electric grinder with a cut-off wheel works better. What kind of painting are you thinking of doing? Auto? Woodworking? What other tools might you be running? For car painting you can get by with a 10 + CFM "econo" type compressor that can be bought in the $400 range and HF has some decent guns that are VERY cheap, the 43430 "purple" gun that is so popular is on sale right now for only $19.95 and it is a darn good gun at that price.
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Old 11-14-2007, 03:41 PM
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i just want to spray my chassis..not planning on doing the body myself..i think your right it would be better to get a grinder for cutting..that spray gun you mentioned from HF what size compressor would i need to run that..sounds like a good one for the little work i have planned for it
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Old 11-14-2007, 05:06 PM
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I'm not exactly sure what cfm you need to spray, but to run the air tools you'll need some good cfm capabilities. You could probably run an impact off the little compressor fairly well, since it's only intermittent use.

For a grinder or something running for more than a ziiiip, ziiip, ziiiip, ziiiiip, ziiiiip...... expect to pay a fair amount for a good compressor. Check the bargain corner and craigslist (free local ebay) for a well maintained used one to save money. Residential use for a new heavy duty unit is almost overkill in my opinion since they're not used all that often. Then again, you know when the tank is drained, made sure the duty cycles were not exceeded, etc.
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Old 11-14-2007, 06:53 PM
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That particular gun would require at least 10 to 12 CFM but it does a really good job for BC/CC body painting. Since you are only going to use it for frame work they have a decent gun for around $15 that would only require a compressor half the size of one in the CFM range I mentioned. I say "decent" gun for 15 bucks but I mean for chassis work and I would not want to paint a body with it but I suppose it could be done. Don't buy ANY compressor with a direct drive oil-less pump since those things are junk and I do mean junk! ALL of them! If you have 220 power available then spring for the 10-12 CFM "econo" compressor because they will cost very little more than one half the size and you can do a heck of a lot more with it. The compressors I am talking about will have a 15 AMP motor with about 3 1/2 real (running) HP but will probably have a phony "peak" rating of 6 to 7 HP which is meaningless but that is unimportant if the CFM is in that range. These things usually have a 60 gallon vertical tank which makes them stationary so if you need something more portable you can probably find one of about the same capacity (CFM) mounted on a smaller tank with wheels, these will perform just as good as the stationary models but will be easier to move around. If you are limited to 110 power then your choices are very limited and about the only advice would be to buy the most CFM you can find on one and don't plan on painting anything larger than that frame.
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