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Finish Grinding Disc Recommendation

Discussion in 'Builds and Fabricators Forum' started by fyrmn, Feb 10, 2021.

  1. Feb 10, 2021
    fyrmn

    fyrmn Member 2022 Sponsor 2021 Sponsor 2020 Sponsor

    High Desert AZ
    Joined:
    Apr 29, 2006
    Messages:
    152
    What discs are you using for finish grinding?
     
  2. Feb 10, 2021
    jeep peep69

    jeep peep69 Member 2021 Sponsor

    redding ca.
    Joined:
    Dec 8, 2007
    Messages:
    471
    120 grit flap disks from benchmark.
     
  3. Feb 10, 2021
    FinoCJ

    FinoCJ 1970 CJ5 Staff Member 2021 Sponsor 2020 Sponsor

    Bozeman, MT
    Joined:
    Jul 18, 2013
    Messages:
    4,501
    I have moved to flap disks as well...much smoother finish....
     
  4. Feb 10, 2021
    givemethewillys

    givemethewillys Been here since sparky ran it. 2022 Sponsor 2021 Sponsor 2020 Sponsor

    New Kent, VA
    Joined:
    Jun 21, 2005
    Messages:
    1,801
    Agree with flap disks. However, if you're talking about cleaning up random paint, bondo, and skuz from a panel after grinding, then paint stripping disks can't be beat. I get my stuff from benchmark abrasives too. 4 1/2" x 7/8" Benchmark Abrasives - Paint & Rust Stripping Cup Wheel - 10 Pack: Wall Surface Repair Products: Amazon.com: Industrial & Scientific

    edit: sidenote- I'm annoyed now, because I ordered a 5 pack of these just a few days ago for $30. A 10-pack wasn't available, or I just didn't see it. On benchmark's site, they had a 10-pack, but with shipping it came out to $50!
     
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  5. Feb 14, 2021
    sterlclan

    sterlclan Member 2022 Sponsor 2021 Sponsor

    exploring the...
    Joined:
    Feb 21, 2009
    Messages:
    3,717
    for general finish grinding , bondo and paint or just cleaning sheet metal I use 3m flex discs in 36 grit. flap discs for finishing welds. Hard grinding discs for thicker steel and weld prep.
     
  6. Feb 14, 2021
    Dave Deyton

    Dave Deyton Member

    Fuquay-Varina, NC
    Joined:
    Oct 12, 2003
    Messages:
    553
    A lot of times to take down the high parts of the weld I will use a thicker cut-off wheel its edge to take it down some. I like to use the Roloc grinding and Roloc Scotch Brite discs after that. I have used the flap discs for welds on thicker steel and liked the finish it left. Too heavy grinding on the metal for too long can warp the metal also. The majority of problems I have had to fix from welding in patch panels was because I was too impatient and tried to move too fast.


    Dave
     
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