Blasting media for aluminum frame

Discussion in '1911 Gunsmithing' started by 1911enthusist, May 9, 2019.

  1. 1911enthusist

    1911enthusist Active Member

    120
    Feb 7, 2019
    What blasting media can I used to sandblast my aluminum frame prior to Durakote. I heard 120 grit sand at 80 psi @ 6 inches away. Can I just get silica sand from Home Depot or special order from Amazon?
     
  2. tac45

    tac45 What me worry ? Supporting Addict

    Mar 4, 2012
    TTT specializes in blasting media. !

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    Journeyman1234 likes this.

  3. pistolwretch

    pistolwretch Dremel jockey Supporting Addict

    Aug 26, 2011
    I use 120 grit Aluminum Oxide only.
    It is expensive, comparatively.
    PSI determination is difficult.
    Measured at the compressor outlet or at the gun?
     
    SparkyAZ likes this.
  4. 1911enthusist

    1911enthusist Active Member

    120
    Feb 7, 2019
    Compressor outlet

    I am looking at the 240 or 120 grit on AMazon
     
  5. pistolwretch

    pistolwretch Dremel jockey Supporting Addict

    Aug 26, 2011
    Be aware of the health hazards associated with atomized silica
    sand.
     
    SparkyAZ and claybuster like this.
  6. pistolwretch

    pistolwretch Dremel jockey Supporting Addict

    Aug 26, 2011
    Pressure at the compressor is not equivalent to pressure at the nozzle.
    Lots of factors in play.
     
    dclevinger and SparkyAZ like this.
  7. Bender

    Bender Supporting Addict Supporting Addict

    Aug 15, 2011
    Respirator is a must with silica
     
  8. Combat Weapon Systems

    Combat Weapon Systems Gunsmith

    115
    Mar 31, 2019
    I use 120 grit Aluminum Oxide and run from 40psi - 60psi at the compressor outlet. That works for my setup you will just have to do a little testing. Get some scrap pieces and blast them at different pressures see what kind of finish you get. The higher the pressure the deeper the blast media will etch the surface.
     

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