De-burring after drilling?

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  • Jordan
    I. Am. Canadian. 🇨🇦
    • Jul 2020
    • 3508
    • Southern Ontario, Canada

    #1

    De-burring after drilling?

    I'm looking for suggestions/techniques on how to de-burr a barrel after porting.

    I think I'm going to do something to my KP - it's a bit louder than I like.
  • Grendel
    MCB Member
    • Jul 2020
    • 1980
    • Lexington, SC

    #2
    You can just ream the inside of the barrel to remove the burrs or use a de-burring bit

    https://ezburr.com/

    Blind De-burring bit like in the above link.

    Click image for larger version  Name:	0575505-23.jpg Views:	0 Size:	5.7 KB ID:	184273


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    • Ecapnation
      MCB Member
      • Jul 2020
      • 4330
      • South Central Long Island

      #3
      Flex hone it.

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      • Spider!
        MCB Member
        • Jul 2020
        • 541
        • Houston

        #4
        I have filled a brass insert I made with steel shot and compound, then put it in the lathe at low speed for a while. Anything like a rock tumbler would also work. Just needs to let the shot tumble. You can partially stuff the barrel to isolate the section you want to deburr. It is slow.
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        • Jordan
          I. Am. Canadian. 🇨🇦
          • Jul 2020
          • 3508
          • Southern Ontario, Canada

          #5
          Unfortunately I don't think any of these suggestions will work with my budget and equipment limitations. 🙂

          They did spark a couple ideas, so I should be able to come up with a solution.

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          • Meleager7
            MCB Member
            • Jul 2020
            • 2180
            • Ontario, Canada

            #6
            How are you going to index your work to next drill position, so the holes don't end up all janky?
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            • Jordan
              I. Am. Canadian. 🇨🇦
              • Jul 2020
              • 3508
              • Southern Ontario, Canada

              #7
              Originally posted by Meleager7
              How are you going to index your work to next drill position, so the holes don't end up all janky?
              I've got a couple ideas, but I'm still working through all the details in my head.

              Can't be any worse than stuff PPS has put out over the years, either way. 🙂

              Comment


              • Meleager7
                Meleager7 commented
                Editing a comment
                ok, i trust ya to keep that jank in check!!
            • Kit
              MCB Member
              • Jul 2020
              • 455
              • Cali

              #8
              I have used a round rod with a slit cut into the end and a strip of sand paper to make a flapper wheel.

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              • woouulf
                Haters gonna hate...
                • Jul 2020
                • 2259
                • Victimville Californica

                #9
                Old Reds swab with 1200 grit wet / dry sand paper wrapped around it... I
                use the strait shot swab that doesn't fold and it fits inside a hand drill... I use the same without sandpaper and use polishing compound for brass barrels...
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                • flyweightnate
                  MCB Member
                  • Jul 2020
                  • 1903
                  • Dallas, TX

                  #10
                  I've had luck with a flex hone. They're only around $20.

                  A stack of rubber washers with a long bolt and nut through them makes for a good expanding mandrel; you might be able to wrap this in sandpaper to get the size just right. Probably need a good fit on the washers to begin with, though. 5/8" might be close enough if you wrap it with enough paper.

                  For indexing the barrel, cut a block of wood into an octagon, then bore it, then slit it. Clamp it tightly on your barrel, and you'll always be able to index 45 degrees. Just don't unclamp it until you're done!
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