Air Compressor

sisterpine · #1 04/01/14, 12:29 PM

You folks are my private consumer guides LOL and I need to replace a dead craftsman 8 gal oil less electric air compressor. Unfortunately I had to leave my "almost new" dewalt air compressor in Montana when I moved.

The new compressor will be used primarily for spraying paint, filling a few tires, using air wrenches , nailers, etc.

Requirements:

8+ gallons (got to be able to get it into the truck- weight) maybe 6 gal if it recharges fast?
Wheels
Electric
150 psi at least max
quiet operation
vertical or horizontal,
one or two tanks

considering craftsman and Campbell hausfeld at this point. Experienced advice please! TIA sis PS I will not be ticked off if you suggest something, I decide to buy it and then it self cremates!

farmerj · #2 04/01/14, 12:31 PM

What are the cfm requirements for the paint sprayer. That's more important than anything else you've given so far.

sisterpine · #3 04/01/14, 01:18 PM

Looks like 70-90

sammyd · #4 04/02/14, 12:35 AM

70-90 Cfm @ 150 psi? Not gonna get that from any small compressor.
Why on earth do you need that kind of performance?

idigbeets · #5 04/02/14, 05:59 AM

Nah that's really high for a paint sprayer. I know a home mechanic who does a lot of auto body work for friends, family etc, who ran his paint sprayers off a craftsman 33 gallon 150psi compressor. As long as you aren't doing long pulls of the trigger, anything around that size and larger will work.

A quick google... http://www.engineeringtoolbox.com/ai...ols-d_847.html

shows 20psi for paint.

sisterpine · #6 04/02/14, 09:29 AM

Thanks folks, I will recheck the information given to me by my brother to make sure I am not mistaken....which I likely am LOL. sis

Harry Chickpea · #7 04/02/14, 11:24 AM

Spraying paint - auto-body paint, wall paint, airbrush paint? I doubt you need anything that big for casual use.

plowjockey · #8 04/02/14, 09:19 PM

Deleted post not what you were looking for.

Earthling · #9 04/03/14, 12:04 AM

If you use an HVLP spray gun you won't need all the pressure or that much CFM. Today's HVLP guns use less air than the older conventional guns. As mentioned, 150 lbs pressure is a lot. In forty years, I've never cranked mine up that high. Also, I doubt you will find a "quiet" air compressor. I have a blurb about compressors on my tractor page. It ain't much but maybe can shed some light. http://www.goldfinch-acres.com/B21.html

Dutchofsc · #10 04/03/14, 04:27 AM

Ch is a good brand and has served me well. HVLP guns use low pressure, about 20 or 30 psi, but at a high volume. High volume low pressure guns usually need a big tank or a high cmf rating. 150 psi is overkill, and possibly dangerous. 90 psi is the OSHA max for air and many tools will break if you go much above that. Even for large impact guns more volume at 90 psi is the trick to get more power.
I have a 60 gallon ch unit, and with my HVLP gun, I was able to paint an entire motorcycle, frame, all parts and tins on just 3 recharge cycles. This would not work for your application, because of portability but it is a good compressor.
I would recommend a compressor that uses oil, and to use good synthetic oil after the break in period. I have seen too many oil less compressors burn up. Always use compressor oil, not regular oil because it will build up on the valves. I once witnessed an $8000 industrial compressor get trashed because someone used the wrong oil.
Beat of luck, let us know what you get.

Sent from my iPad using Homesteading Today

agmantoo · #11 04/03/14, 08:31 AM

On a top quality air compressor the best you are going to get is about 4 CFM per horsepower. Disregard the HP rating that is highly touted to be the number that represents the output of the air compressor. Those units have a motor that has an SP in the description and they do not make the HP advertised. The horsepower stated is an advertising gimmick! This SP is a meaningless means of influencing a buyer to buy a unit. A slower running machine (1050 to 1150 RPM) instead of a higher rpm undersize compressor will be quieter and longer lasting. I would never buy an oil less compressor and the suggestion regarding going with a synthetic oil is right on.

sisterpine · #12 04/03/14, 09:40 AM

The painting will be buildings not vehicles. We already have the paint sprayers (just stored not at home) brother says he had an 8 gal sprayer before and it worked fine but I remember it being pretty darned loud. Am going to get the make and model of the paint sprayer and see what it needs. thanks again, sis

nosqrls · #13 04/03/14, 04:32 PM

IR makes a ---- nice Industrial compressor. 8 gal either electric or gas. wheel barrow style. electric is 110 or 220 flip of the switch. 11.3 cfm at 90 I believe. All cast iron. in the navy we used IR compressors that where 50+ years old ship was decommed rip out air compressor rebuild and into a new ship or one in use. Ingersoll rand are tough but not cheap 700 to 900$ .

farminghandyman · #14 04/03/14, 09:35 PM

most single stage compressors are not designed to pump over 125 psi,

most likely the 60 or 70 was PSI rather than CFM,

I have this little compressor and it is only 50 CFM at about 125 PSI.

so I think your air requirements are off,

but I would guess if you can find some with about 10 CFM it will handle most ever thing you need,