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View Poll Results: What kind of Air Compressor do you have?
Oil-less less than 10 gal 6 2.06%
Oil-less 10-20 gal 17 5.84%
Oil-less over 30 gal 42 14.43%
Oiled less than 10 gal 5 1.72%
Oiled 10-20 gal 26 8.93%
Oiled 30-50 gal 40 13.75%
Oiled over 50 gal 150 51.55%
don't know 5 1.72%
Voters: 291. You may not vote on this poll

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  #91 (permalink)  
Old 01-10-2006, 09:47 PM
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I'm considering making a thread based on CFM supply @90spi... that's standard psi they rate supply at, right?

Given some values from itty-bitty-$59.99 compressor to big industial units I'll make a thread and a corresponding poll. Or Oldred could do it. He knows alot about this stuff.

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  #92 (permalink)  
Old 01-27-2006, 11:52 PM
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Air compressors

I have to agree with Oldred, Having worked in the Heavy Equipment and truck Industry for over 35 years, I have seen one air tank explode, it took out a concrete block wall . It happened at knight . When we came in the next morning the compressor was still running. I personaly have a 25 year old IR. It is a 5hp two stage on a 80gallon tank, I think I will wear out before it does.

OLD HEMI
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  #93 (permalink)  
Old 01-28-2006, 09:51 AM
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Just for those who still think they can't explode


http://www.doli.state.mn.us/airtank.html

Last edited by oldred; 01-28-2006 at 09:58 AM.
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  #94 (permalink)  
Old 01-29-2006, 08:52 AM
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compressor

I have an IR 5hp dual stage 80 gal 175 max psi. Makes I think 25 cfm @90 psi. I never want for air although haven' t tried sandblasting yet.
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Old 02-05-2006, 06:46 PM
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nissan

Quote:
Originally Posted by fast neutron
Does anyone on here have a 30gal. oil-less Craftsman compressor? I'm seriously thinking about one for my first compressor but not sure about their durability. I guess what I'm wondering is will this thing heat up and fry itself if I put a big air demand on it, i.e. greater than the 6.2 scfm @40psi advertised.

Thanks,

Matt
I have a 6 hp. 60 gal. craftman oilless. runs great just can't sand or sand blast for long periods. I am selling it for $200.00 OBO. I am buying an IR-T30 brand new. I had a new one for 9 years with no problems. went out of business.
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Old 02-05-2006, 07:04 PM
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I guess I am a little late in the discussion, but......

My bigger compressor is a 5hp "black max" (sanborn?) with a 60 gallon tank. It works ok for a home shop like mine. Its not really big enough for a production shop though.

I need to mount it permanently and plumb lines instead of dragging a hose everywhere though.


I have a small portable one I haul around when needed. It a 5hp briggs on a 20 gallon tank. Comes in handy in salvage yards, painting a house, for roofing, etc.

Brian
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  #97 (permalink)  
Old 02-09-2006, 06:48 PM
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Quote:
Originally Posted by Brian_B
I guess I am a little late in the discussion, but......

My bigger compressor is a 5hp "black max" (sanborn?) with a 60 gallon tank. It works ok for a home shop like mine. Its not really big enough for a production shop though.

I need to mount it permanently and plumb lines instead of dragging a hose everywhere though.


I have a small portable one I haul around when needed. It a 5hp briggs on a 20 gallon tank. Comes in handy in salvage yards, painting a house, for roofing, etc.

Brian
my great-uncle has one at his cottage up north. It's a bit overkill for what it's used for, which is filling tires and air-cleaning stuff a few times a year. But, overkill is adequate for me.
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  #98 (permalink)  
Old 02-10-2006, 02:33 AM
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I was going to start a new thread regarding air compressors but hopefully someone will answer my question:

WHAT PSI RATING DO I NEED TO GET?
DOES THE CAPACITY HAVE ANYTHING TO DO WITH THE TOOLS IT WILL OPERATE?

I want to be able to use ALL my air tools, including an impact wrench, grinder, cut off wheel, sander and 3/8" drive ratchet
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Old 02-10-2006, 03:32 AM
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Quote:
Originally Posted by Riot Racing
I was going to start a new thread regarding air compressors but hopefully someone will answer my question:

WHAT PSI RATING DO I NEED TO GET?
DOES THE CAPACITY HAVE ANYTHING TO DO WITH THE TOOLS IT WILL OPERATE?

I want to be able to use ALL my air tools, including an impact wrench, grinder, cut off wheel, sander and 3/8" drive ratchet
I am certainly no expert, but you need to know the CFM of your tools at what pressure the require. Then buy a compressor large enough to supply that.

Even different brands of the same tools require different amounts of air. For example: Central pneumatic (harbour freight-cheap tools) DA requires 8 CFM @ 90 PSI. The Hutchins 3500 (good quality) requires 11.0 CFM @ 90 PSI. I can't even find the requirements for my old Ingersoll-Rand one (probably tooo much).

I do know from experience that a small compressor will not keep up with the older siphon feed paint guns and my DA. Those were my two biggest air users. Thats why I ended up with the black max listed above.

Hope that helps a little,
Brian
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  #100 (permalink)  
Old 02-10-2006, 09:25 AM
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Riot, ANY compressor will have an adequate PSI rating, it's the CFM you have to be concerned about. This has been covered in detail in this thread and others so if you will search "compressor" you should find tons of info on how to select a compressor and how NOT to get ripped off while shopping for one. A great many compressor outfits simply lie about what their units are capable of and you really should familiarize yourself with the workings of these things before you plop down your hard earned money. Read this entire thread and don't fall for those phony HP numbers and over-sized tanks because CFM is what counts NOT horsepower and tank size!
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  #101 (permalink)  
Old 02-10-2006, 12:53 PM
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hassel free moister removal

.. found a nice little addition one may want to add to your compressor. I have had this product on my unit for the past 4 months just to test and see if it would do as advertised, and to my surprise it has. This valve senses a pressure change and monetarily opens to allow the moister to vent out of the tank. This occurs at the beginning and end of each cycle. It happens quickly and I imagined it would in time not keep the tank dry...... well it is working out great I have checked the tank after one and two months time elapses and the tank is water free... here is the link http://www.harborfreight.com/cpi/cta...emnumber=42221
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  #102 (permalink)  
Old 02-10-2006, 02:26 PM
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Pepi, That little outfit works great! I usually am a bit reluctant to recommend gadgets from HF but that one is a super bargain
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  #103 (permalink)  
Old 02-13-2006, 07:59 AM
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oldred, I know what you mean, I like stuff that works as designed, and this is one of those... for sure
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  #104 (permalink)  
Old 02-13-2006, 09:02 AM
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Air dryer

I have one of these a little reluctant to use only rated at 100 psi. My compressor shut off is 175 psi. I have a drain from a truck air tank
with a pull cord.I pull the cord several times a day.
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  #105 (permalink)  
Old 02-13-2006, 05:39 PM
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Any ideas??

I have a sanborn/coleman powermate 60gal 2 stage (B4900) pump. It seems lately that it's taking alot longer pumping up to pressure. I took the top off and the cylinders look great valves look okay. ANy ideas?? would replaceing the valve be a good palce to start??


MIke
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