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Thread: Cleaning bronze castings

  1. #1
    Join Date
    Oct 2000
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    Padanaram, MA USA
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    Default Cleaning bronze castings

    I've had a couple of parts cast for the current project.
    What are the effective tools for cleaning and polishing?

  2. #2
    Join Date
    Dec 2001
    Location
    Northern NSW Australia
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    73,431

    Default Re: Cleaning bronze castings

    Depending on how rough they are I use one of the sand paper flap discs on an angle grinder in progressively finer grit then a felt buffing wheel loaded with abrasive . It's not fast but the results are good.
    '' You ain't gonna learn what you don't want to know. ''
    Grateful Dead

  3. #3
    Join Date
    Sep 2010
    Location
    Rushworth Australia
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    2,510

    Default Re: Cleaning bronze castings

    Would an upside-down belt sander work ok Peter? Or do the belts get choked up?

  4. #4
    Join Date
    Jan 2005
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    Deepest Darkest Wales
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    Default Re: Cleaning bronze castings

    Depends on the shape and size of the casting....

    Done hundreds of bow risers in aluminium and magnesium using a one and a half inch wide free belt sander (no platten), but for smaller stuff something like a black and decker powerfile might go well.
    Creationists aren't mad - they're possessed of demons.

  5. #5
    Join Date
    Jun 2010
    Location
    PNW, an island west of Seattle
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    Default Re: Cleaning bronze castings

    It all depends on what the part looks like. But, one can do a lot of cleanup work with a right angle air powered die grinder. Fit with sanding discs in whatever grit is needed. Follow them with red, blue, grey scotch-brite discs. These won't get you to polished but close enough for me.

    A stationary belt sander is also quite handy.

    Jeff

  6. #6
    Join Date
    Mar 2011
    Location
    Mukilteo, WA
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    1,908

    Default Re: Cleaning bronze castings

    The scotch brite disks for grinders or air tools are fast and leave a silky smooth finish.

  7. #7
    Join Date
    Feb 2000
    Location
    San Francisco Bay
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    11,687

    Default Re: Cleaning bronze castings

    And when you're done, you'll understand why they charge what they do for polished bronze hardware ! The cost is really in the time it takes to do the handwork.

  8. #8
    Join Date
    Mar 2002
    Location
    huntington, VT
    Posts
    96

    Default Re: Cleaning bronze castings

    Norton makes some nice deburring wheels. they are sort of a spongy rubber matrix with grit...i find them very useful for surface work not need ing a grinder

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