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  1. #1
    mrbtd's Avatar
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    Air compressor size

    I have a newer 30 gallon upright air compressor I have been using about 10 months now. When I use my die grinders for clean up or a little ginding it always seems to turn on - Is that normal ?

    When using impact wrench, ratchets or my nailer I am not having any trouble.


  2. #2
    Quote Originally Posted by mrbtd View Post
    I have a newer 30 gallon upright air compressor I have been using about 10 months now. When I use my die grinders for clean up or a little ginding it always seems to turn on - Is that normal ?

    When using impact wrench, ratchets or my nailer I am not having any trouble.

    YES! You are using more air with the die grinder! I have notice the same thing with mine! The nailer is start-stop. The impact wrench will use more air than the nailer pending on what you are working on.

  3. #3
    Bill, I have a 33 gallon 6.5 HP twin cylinder 240 volt A/C.

  4. #4
    mrbtd's Avatar
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    I was using it again today..I double checked the tank is not leaking @ all but after only a minute it fires up. Almost like it cant keep up with the demand.

    I was under the impression it sat there full of air and then waited till it was partiall empty and then refilled the tank ?

  5. #5
    Moderator RX951's Avatar
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    my 25 gallon horizontal craftsman does that when I use a die grinder.
    Die grinders chew up alot of air. But remember, if the pressure regulator is set at 125psig for example, it may be kicking on to refill at 90 or 100psig. So, 20-30 psig drop every minute aint bad using a die grinder. Thats normal.

  6. #6
    ADSR's Avatar
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    what's the CFM @ 100 PSI? This is the real key to making enough air.

    I have a 60 gallon tank and my unit puts out 18 1/2 CFM @ 100 PSI

  7. #7
    GOT BOOST? Dockside's Avatar
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    Ya thats normal. Die grider is constantly using air, impacts dont use any where near the amount die grinders,drills and grinders use.

  8. #8
    Altezza01's Avatar
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    i have a 3 gallon and it stays on all the time when i'm using any tool

  9. #9
    mrbtd's Avatar
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    Thanks everyone....Nice to know I am not alone here. I am going to play with the pressure regulator a bit maybe I will get a slight improvement. I remember reading a spec for the max the tool can handle and I have been ignoring it.

  10. #10
    cheatin' piston popper addicted's Avatar
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    [email protected] psi is the key. All air tools are rated at that pressure. most newer compressors have a sticker on them listing the various tools that it can power, and for how long.

    I have a 60 gal 2 cylinder, 5 hp IR compressor with a dryer and it cycles when i use a grinder. At work I have a 40hp 50+ cfm IR with 2 300 gallon tanks that's the ticket if you have an extra room in your house and about 30K to spare

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