[Jewelry making - Article 00201] - Re: [Orchid] Air tools

[Dave Arens]

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    Hi Epaul, 

>     I am intrigued by your idea. What cleaning solution are you using?
>     When I think "air powered blow gun" what comes to mind is the hand
>     held power sprayer (like the coin-op car wash wand, only about 6"
>     long). Is that what you are referring to? 

    It really depends on what I'm trying to clean. I've used alcohol,
    acetone, alcohol-water-soap & water-soap mixtures. They've all worked
    well. 

    Actually the 1st sprayer I made was from a regular air blow gun, the
    type usually seen in garages & gas stations. They're basically a push
    button valve with a short length of 1/4" copper tube attached. I
    drilled a small hole in the 1/4" tube & inserted a 1/16" tube with
    the open end pointing down stream. The other end of the 1/16" tube
    was attached to a plastic hose that's put in the liquid to be
    sprayed. When the button is pushed, the air rushing by the 1/16" tube
    causes a venturi effect & draws the liquid from supply. This same
    principle is used in all siphon feed spray guns, perfume atomizers &
    garden hose attachments for spraying fertilizers & insecticides. 

>     I suppose an air brush wouldn't have enough pressure to do any
>     good, but what about the $10 sand-blaster from Harbour Freight
>     (about the same size as an air-brush)?

    It all depends on what you're trying to do with it. how large the
    orifice is & how much air pressure you apply. I think most steamers
    operate around 70 psi. With an air compressor & regulator, you can
    adjust the pressure to anything between a few psi & the max the
    compressor is capable of, usually around 125 psi. 

Dave

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