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  1. #11
    Silver Member catskinner's Avatar
    Join Date
    May 2010
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    201
    Location
    SE MI
    Tractor
    AC 170

    Default Re: air compressor

    hockey pucks makes good mounts when bolting to the floor.

  2. #12
    Elite Member sandman2234's Avatar
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    Dec 2005
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    4,091
    Location
    Jacksonville, Florida
    Tractor
    JD2555

    Default Re: air compressor

    Raspy nailed it right! CFM is the question that needs answering!
    I had a compressor for sale that a friend was interested in, but he bought a "bigger one" from the box store. He couldn't run his impact wrench with the new one for a complete set of tires (doing a tire rotation)without having to wait on it to build up. He came over with his impact and we did my truck tires with that air compressor and it never even slowed down. He ended up buying mine and hooking the two up in tandom. He uses the cheap one for airing up tires and such, and mine (or both of them together) when he needs some serious air.
    The size of the tank has very little to do with the performance of the unit as a whole.
    David from jax
    A serious accident is one that money won't fix.

  3. #13
    Platinum Member
    Join Date
    Feb 2012
    Posts
    837
    Location
    sioux city, ia
    Tractor
    Oliver 1855, Case 1840, Cub 1550

    Default Re: air compressor

    I have a IR 60 gal 2 stage, bought new in 1987, works great, no problems and is still on pallet. Makes it is easy to drain tank. I installed 2' lenght of 1/2" hydralic hose and plumbed garage with 1/2" galvanized pipe, sloped down hill back to tank. I use IR synthetic oil. A two stage will give you 150 psi +, and single stage 125 psi max. Be sure to get enough CFM, check max use on your tools.

  4. #14
    Epic Contributor Bird's Avatar
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    Mar 2000
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    36,990
    Location
    Texas

    Default Re: air compressor

    A two stage will give you 150 psi +, and single stage 125 psi max.
    That used to be correct, and as a general rule still is, but there are exceptions. I've had this Industrial Air by Coleman PowerMate for over 6 years. It comes on at 125 psi and kicks off between 150 and 155 psi running on 120 volt.

    And prices have sure gone up. I paid $536.08, including sales tax, at Northern Tool in Sept. '05. But Northern Tool doesn't have these anymore.
    Bird

  5. #15
    Platinum Member Raspy's Avatar
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    Dec 2006
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    875
    Location
    Northern Nevada
    Tractor
    NH TC29DA Bolens G14 Skytrac 5028 Dodge Cummins Jeep Rubicon Grizzly 700

    Default Re: air compressor

    Larry,

    230 volts at 15 Amps is only 4.6 horsepower. If that is the "max" it can draw it must be full locked rotor amps, not running amps. So it's more likely about 3 horsepower.

    More important information is the cu ft output at 90 PSI.

    Overstated horsepower figures are common in the industry.

    Another clue is to look at the motor plate and see what it says. If it says SPL, it means it's less than advertised on the compressor spec sheet. If it says 5 Horsepower, it means 5 running horsepower.

    People should buy the biggest compressor they can afford and have power to run, for a shop, or match the output in CFM to the tool they want to operate. 18 CFM at 90 psi will comfortably run a 12 CFM tool at 90 psi, etc.

    And single stage compressors will generally put out more CFM in the practical working range, than two stage compressors. Two stage is for working pressures over about 130 lbs.

    I just hate all the misleading advertising that goes on.
    John

    I only exaggerate enough to compensate for being taken with a grain of salt.

  6. #16
    Epic Contributor Bird's Avatar
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    Mar 2000
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    36,990
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    Texas

    Default Re: air compressor

    John, after some class action lawsuits, some of the exaggerated horsepower ratings came way down, although I'm no sure they all came down far enough. You know I once had a "3.5 hp" oilless Craftsman by DeVilbiss and they later went to labelling the same compressor as "4 hp". And now I think they're rated at 1.6 running hp. I also used to have this same model Puma air-compressor when they were labelled as "6 hp". The dealer told me at that time that they called them an "imitation 6 hp" and showed me one of their actual 5 hp motors that, of course, was much larger. I see the Puma is now labelled as 3 hp and I'm not sure that isn't still exaggerating a bit.
    Bird

  7. #17
    Platinum Member Raspy's Avatar
    Join Date
    Dec 2006
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    875
    Location
    Northern Nevada
    Tractor
    NH TC29DA Bolens G14 Skytrac 5028 Dodge Cummins Jeep Rubicon Grizzly 700

    Default Re: air compressor

    Bird,

    Exactly.

    Have you seen the 6 HP shop vacs that run on a 15 amp 120 volt circuit? I think they take the gallon size of the barrel and call that the HP. It would be OK if nobody believed them, but................oh well.
    John

    I only exaggerate enough to compensate for being taken with a grain of salt.

  8. #18
    Epic Contributor Bird's Avatar
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    Mar 2000
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    Texas

    Default Re: air compressor

    Quote Originally Posted by Raspy View Post
    Bird,

    Exactly.

    Have you seen the 6 HP shop vacs that run on a 15 amp 120 volt circuit? I think they take the gallon size of the barrel and call that the HP. It would be OK if nobody believed them, but................oh well.
    My 12 gallon Craftsman shop vac is labelled as a 5 hp. You don't think that's an exaggeration, do you?
    Bird

  9. #19
    Platinum Member westbrooklawn's Avatar
    Join Date
    Apr 2005
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    644
    Location
    North Carolina
    Tractor
    kubota L3400HST

    Default Re: air compressor

    The specs on the Eaton compressors look very good, and the 5 year unlimited warranty is exceptional. Another thing I like about their website is that they give db ratings for their compressors. Their $541 single stage is 74db (pretty quiet), and 11.2 cfm at 90lb. That seems like a lot of compressor for the money, however shipping isn't include so that may drive the cost up considerably. Does anyone have experience with these compressors?

    3 - 25 HP Air Compressors : Piston Air Compressors for Sale : EatonCompressor.com
    L3400HST, L463 FEL, Markham toothbar, Markham Grapple, Woods BH80-X, 5 1/2' United box blade,6' Leinbach scrape blade, Pallet forks, 5' King Kutter RM, 56" First choice tiller, Leinbach rake

  10. #20
    Super Member two_bit_score's Avatar
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    Dec 2008
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    6,840
    Location
    Texas -from the brush and pear to the piney woods
    Tractor
    110 TLB

    Default Re: air compressor

    Best you can get: Rolair.


    Rolair Systems



    .

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