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  1. #1
    Join Date
    Jun 2012
    Posts
    19

    Aluminum 7075 surface finishing.

    I have some parts that I am facing off in a cnc machine. Its the top of some 1/2" places that are about 6" x 1". These are cosmetic pieces and I have them anodized type III hard coat black for the customer. I have to tumble the parts for a very long time before sending it to anodizing and there are still some swirls you can see behind the anodizing. Is there like a wire cup brush that I can use to chuck in a holder and run it across the top to smooth out the finish?

    I was looking at buying some brass wire cup 2" brushes but didnt know if they would be to rough on the surface. I know they make brushes in nylon, stainless steel, brass, aluminum, etc. I can take a scotchbrite and scuff it for about 2 mins and almost get them out. What is the best to use on aluminum for a smooth finish?

  2. #2
    Join Date
    Mar 2014
    Posts
    1

    Re: Aluminum 7075 surface finishing.

    Use 128 grit bead blast media.

    Sent from my SM-N900T using Tapatalk

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