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Question about sand blaster PSI?

Discussion in 'The Garage' started by jjlaughner, May 22, 2003.

  1. jjlaughner

    jjlaughner 3/4 ton status

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    Location:
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    I have a sand blaster I bought from a garage sale. Its a gravity feed Craftsmen, pistol grip with trigger, 5gallon tank, and it has some course grain white sand in it.
    I was blasting away today at about 65-70 PSI and it was dooing pretty good, up'd to 80 and of course it works better and uses about twice the sand.
    Does anyone else use a sand blaster? what PSI you run them at? I am definatly buying a blasting box of some sort soon!
     
  2. Stomper

    Stomper ΜΟΛΩΝ ΛΑΒΕ GMOTM Winner

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    I blast at 80 psi. But on my blaster I can adjust the sand flow.
     
  3. TONYP

    TONYP 1/2 ton status

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    we have the kind at work here...must blast at 150psi cause it blow your hand back when you step on the air... /forums/images/graemlins/thumb.gif
     
  4. gravdigr

    gravdigr 1/2 ton status

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    I'm a professional sandblaster. I carve granite monuments (headstones). A couple things you need to think about are nozzle size and compressor output. We use a 3/16" nozzle orifice for the small blast cone. Sandblasters for doing metal work like car frames and sich can use up to 1/2" but need massive airflow. We use a lindsay 125cfm compressor pushing 100psi. We can go higher but it tends to burn the rubber stencil. If you blast in a place that you can recover your media I suggest using no1 dry crushed silica sandblasting sand. It's what we use and I can get a good 10-20 reuses out of it, granted when it gets turned to powder it is sucked out our exhaust system so I don't have to deal with the sand when it is unusable i just add new.

    here is my 1,000lb sandblaster in the background
    http://community.webshots.com/scripts/editPhotos.fcgi?action=showMyPhoto&albumID=73097086&photoID=73098363&security=mvtXNV

    this is a smaller blaster (on the right) that we use steel bead media with.
    http://community.webshots.com/scripts/editPhotos.fcgi?action=showMyPhoto&albumID=73097086&photoID=73098401&security=bhsHaY

    and this is the compressor we use.
    http://community.webshots.com/scripts/editPhotos.fcgi?action=showMyPhoto&albumID=73097086&photoID=73098423&security=lauoTR
     

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