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Thread: Workshop Air Compressor ?

  1. #1
    VladTepes's Avatar
    VladTepes is offline Major Part of the Heart and Soul of AULRO Subscriber
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    Workshop Air Compressor ?

    Chasing an air compressor for the workshop.

    The rider is I want to get one cheap, but not a cheap one !

    This means a 2nd hand unit will probably be the best option as new QUALITY ones are poisonously expensive.

    I'd want one that flows 16cfm+ so I can use it for a bit of blasting / painting.

    If its electric it would need to be 10 amp as I have no 15A sockets available. If a decent petrol one came on teh market I would consider it but I think electric would be less hassle and I could store it away from thieves easier when not in use (in the carport is where I use it).

    Thoughts?
    It's not broken. It's "Carbon Neutral".


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    You will be limited to about 200lpm Free air flow with a 10 amp electric unit. I've got a Supercheap direct drive one that hasnt died yet that will allegedly deliver that much but it is a bit small for my needs.
    Second hand units seem to start at about $600 and are expensive for what they are , I was at a clearing sale a while ago where a nice Com-Pac unit went for about $400.00 but it had modifications welded to the tank

    Aldi apparently occasionally have a 15 amp belt drive unit but i've never seen one in the flesh ( and 've been looking)

    Regards,
    Tote
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  3. #3
    VladTepes's Avatar
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    200lpm is only about 7cfm. Not much use for much.

    Oh and I did mean at least 12cfm not 16, though 16 would be MUCH better.

    Is it possible (without damaging it) to run a 15A unit on 10A circuit? I haven't got a 15A outlet (rental house) but will get one run if/when I buy a house in future.

    Advantages / disadvantages of direct vs belt drive?
    It's not broken. It's "Carbon Neutral".


    gone


    1993 Defender 110 ute "Doris"
    1994 Range Rover Vogue LSE "The Luxo-Barge"
    1994 Defender 130 HCPU "Rolly"
    1996 Discovery 1

    current

    1995 Defender 130 HCPU and Suzuki GSX1400


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    You probably won't damage the unit if you could plug it into a 10amp socket, the 15amp has a larger earth so it doesn't fit into 10amp one.

    Theoretically you could blow you fuse (depending on the load on the circuit) as 15amp sockets normally have their own circuit (at least they do when I have electricians do them for me)


    Richard

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    If you're limited to 10A and only doing intermittent blasting/painting, how about a smaller/cheap compressor and an additional larger (separate) receiver to give you additional air storage for blasting/painting.
    Later when you've got a decent power supply you could flog the cheapie off and probably not lose much, then buy a decent one.

    Steve
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    You'll have to go petrol. I have an old Clisby 17CFM compressor I bought new many years ago. It pulls about 14amps from memory. It *just barely* runs the sand blaster I made. It's much better with the 2nd 8CFM compressor running as well.

    D/A sanders will run slowly, painting is fine ... it runs any spray gun easily. By wanting to sand blast though your going to be absolutely hammering the guts out of it and waiting for it to re-pressurise ( I made a PA blaster which works brilliantly).

    Maybe two 12CFM compressors plugged into seperate circuits in your house could be the trick

    seeya
    Shane L.

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    Sounds like you need to run two smaller compressors in parallel, but even so they're not that cheap.
    2 direct drive 40l Bunnings compressors should get you about 240l/min of air, fine for spraying but a little small for blasting.

    My mate ran an aldi one with a better brand one, not spectacular in their air delivery and quite a bit louder than a better quality compressor.

    Do you really need to sand blast or can you use a grinder to clean stuff up? I find I don't use air tools at all, it's easier to run an extension cord and power everything than run a compressor and have everything air driven.

  8. #8
    Homestar's Avatar
    Homestar is offline Super Moderator & CA manager Subscriber
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    Quote Originally Posted by VladTepes View Post
    Is it possible (without damaging it) to run a 15A unit on 10A circuit? I haven't got a 15A outlet
    Being an Electrician I can't condone that sort of thing, but maybe my 17CFM that draws 13 amps may just be plugged into a 10 amp outlet...

    I don't use it all the time - just a bit on the weekends, and the only time I have a drama is if someone turns the kettle on while it is running as it is on the same circuit.....

    Everyone in the house now knows not to do that if they can hear it running...
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.

  9. #9
    VladTepes's Avatar
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    A mate tells me he bought an Aldi one last year and uses it for just the sorts of things I'll usually be doing when working on the bike. He's quite happy with it especially atthe price and with the Aldi warranty.

    He reckons they will likely come on sale early-Mid September again. (That's when he got his last year)

    SO assuming I can find a way to get a 15A one to plug into a 10A circuit please help me here sparkies- how would one do that in THEORY (not, of course, that one would LOL )
    It's not broken. It's "Carbon Neutral".


    gone


    1993 Defender 110 ute "Doris"
    1994 Range Rover Vogue LSE "The Luxo-Barge"
    1994 Defender 130 HCPU "Rolly"
    1996 Discovery 1

    current

    1995 Defender 130 HCPU and Suzuki GSX1400


  10. #10
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    Quote Originally Posted by VladTepes View Post
    A mate tells me he bought an Aldi one last year and uses it for just the sorts of things I'll usually be doing when working on the bike. He's quite happy with it especially atthe price and with the Aldi warranty.

    He reckons they will likely come on sale early-Mid September again. (That's when he got his last year)

    SO assuming I can find a way to get a 15A one to plug into a 10A circuit please help me here sparkies- how would one do that in THEORY (not, of course, that one would LOL )
    Don't forget the startup current, that'll be the killer, you'll pop the circuit breakers if it's low amperage wire on startup. If you end up running two, ensure they are set to "start" at different pressures so you don't end up with two compressors starting at the same time.

    I only have 10amp power points in my shed. I have no qualms about running two air compressors off the circuit though. It's 40amps from the main meterbox on the house, through to the shed (I climbed up into the house roof and verified the weight/size of the cable heading through the roof before it heads underground. If there's any issues, it'll pop the lower amperage breakers in the shed before the 40amp "shed" circuit breaker in the meter box either way.

    The bigger issue would be if we have the big reverse cycle A/C's in the house running, you would probably then be approaching the capacity of the power cable running upto the street with the compressors running in the shed.

    seeya,
    Shane L.

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