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Old 11-18-2013, 01:58 PM   #1
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Question Question about air compressors for garage

Did some searching, but just wasn't finding the answer I am looking for.

I am getting ready to purchase an air compressor. I have taken note of the types of attachments that I want to have with it. So far, the biggest air hogs are 1) paint sprayer 2) air impact 3) air ratchet

Going off the rule of applying 1.25 x required CFM for the tool, I have found that I need 8.875 CFM @ 60psi (for the sprayer) and 6 CFM @ 90psi for the ratchet and impact.

I have found a decent air compressor 8 gal, oiled that puts out 3-6 SCFM @ 40 psi and 3-6 SCFM @ 90 psi.


Is this still too small for a paint sprayer, or will this be ok? I'm trying not to break the wallet as I am on a budget.

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Old 11-18-2013, 04:07 PM   #2
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Sorry, I don't have the answer but I edited your title so people know you aren't looking for on-board air. Hopefully someone will chime in soon.

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Old 11-18-2013, 04:18 PM   #3
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Based on the specs I can't see why it won't work. Make sure to get some sort of moisture/oil catch if you're painting with it. 8 gallons is about the smallest I'd go for anything. I had a 2 gallon one for a little while and it sucked. I have an 8 now and it runs all my air tools just fine. I got it because it was portable. If you can afford a 10 or 12 gallon those would be even better but 8 is still good
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Old 11-18-2013, 04:32 PM   #4
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Sorry, I don't have the answer but I edited your title so people know you aren't looking for on-board air. Hopefully someone will chime in soon.
Well, its not really just for painting. Could you maybe change it to question about an air compressor for garage? I just have paint sprayer there because that appears to be the biggest air hog of all of them.

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Old 11-18-2013, 04:35 PM   #5
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Based on the specs I can't see why it won't work. Make sure to get some sort of moisture/oil catch if you're painting with it. 8 gallons is about the smallest I'd go for anything. I had a 2 gallon one for a little while and it sucked. I have an 8 now and it runs all my air tools just fine. I got it because it was portable. If you can afford a 10 or 12 gallon those would be even better but 8 is still good
So if something can push that much air at a higher pressure, it should be able to push more at a lower pressure? Or will the volume always be the same that its pushing?
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Old 11-18-2013, 09:38 PM   #6
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Could you maybe change it to question about an air compressor for garage?

Lol - That was my second choice for the renaming. (done)
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Old 11-18-2013, 09:51 PM   #7
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It maybe too small for painting. It will do it, but will run all the time. Will not be strong enough for some air tools either like an impact gun, but will fill your tires up.
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Old 11-18-2013, 10:10 PM   #8
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It maybe too small for painting. It will do it, but will run all the time. Will not be strong enough for some air tools either like an impact gun, but will fill your tires up.
Won't be enough for an air impact wrench? Husky 800lb air impact requires 4.5 cfm @ 90psi

The compressor I found provides 3-6cfm at 90 psi and 3-6 cfm @ 40 psi. What am I missing in the description? I thought I had plenty to play with ( going off the suggestion to multiply the requirement by 1.25 for extra )

And surely an 8 gallon tank can do more than just fill up my tires. This isn't a pancake or hotdog compressor that I am looking at.

I couldn't get the link to go through on the Home Depot app but here is what I am looking at.

If I have this all wrong, please explain to me how to pick the appropriate compressor.
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Old 11-19-2013, 04:50 PM   #9
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No one else has any feed back on SCFM and PsI ratings to help make things more clear?
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Old 11-19-2013, 07:03 PM   #10
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Sorry I dont have any useful info about what size you will need.but I know I have been thru 2 oilless compressors within 6-7 years.I bought a Bel Aire compressor,not oilless,28 gal.Just adding the oilless ones dont seem to last,thats all,carry on.
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Old 11-19-2013, 07:37 PM   #11
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Quote:
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So if something can push that much air at a higher pressure, it should be able to push more at a lower pressure? Or will the volume always be the same that its pushing?
Yes. You may have to buy regulators to fine tune it especially with painting but it will work. Keep in mind those max ratings are you letting it fully charge then it runs constantly. That's not always great. If you're painting or using a lot of air tools you should think about going a little larger unless you really need the portability. Also Black Friday is coming soon so that may help
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Old 11-19-2013, 09:08 PM   #12
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Thanks for the info. My use will be sparingly, like when working on the vehicles or tasks around the house. As far as the paint sprayer, it will be used sparingly as well. We are thinking of painting soon and I really don't want to have to mess with a roller if I don't have to. Would rather spray as much as I can. I have found some other sprayers with Max CFM of 4 @ 90psi

Either way, if something like this will work for the weekend warrior then that's all I need. I am keeping an eye out for Black Friday , that's for sure.
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Old 11-21-2013, 10:48 AM   #13
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I know the "oilless" compressors are loud as hell. Ill never own another one! Get the Cast iron style with an exposed cylinder and a dipstick and they are way quieter. Ive had both. the noisy craftsman wont die... ( the only Craftsman tool thats held up !?)
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Old 11-21-2013, 03:08 PM   #14
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Yeah I was looking at the craftsman. My budget is ~$300 for a decent tank and the craftsman non-oiled one is 33 gallon with 50% duty cycle and 165 psi max and pushes 5.1cfm @ 90 psi and 6.8cfm @ 40psi.

From what I have learned so far, this should do exactly what I need. I am however continuing to look for the same specs with same price for the oiled but I am finding most are out of my set budget range.
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Old 11-21-2013, 06:06 PM   #15
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Yeah I was looking at the craftsman. My budget is ~$300 for a decent tank and the craftsman non-oiled one is 33 gallon with 50% duty cycle and 165 psi max and pushes 5.1cfm @ 90 psi and 6.8cfm @ 40psi.

From what I have learned so far, this should do exactly what I need. I am however continuing to look for the same specs with same price for the oiled but I am finding most are out of my set budget range.
Not to trash Craftsman stuff,I own a lot of there stuff(riding mower,tools,etc) & soon am getting a chainsaw from Sears but I had a craftsman one & just this summer it crapped out.I didnt even use it that much & was kept garaged.Its the last oilless one I owned.I know the oiled ones are more money(just paid 800 for my bel Aire).But seeing I spent 350ish on a H.D. one & another 300 or so on the Craftsman I decided to spend a little more & get a real good one.Maybe I just have bad luck though.
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Old 11-21-2013, 07:02 PM   #16
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I'm hoping to get a belt driven compressor when I have a shop but for now , and for weekend projects it fits what I need. My other option is the Husky 33 gal. Same stats and price.

There is a Dewalt one that is oiled that is like to have but just right outside of my limit.

Appreciate all the feedback y'all.

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