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  1. Home
  2. General Discussion
  3. How to drill 1mm diameter holes? My drills won't even hold the bit!

How to drill 1mm diameter holes? My drills won't even hold the bit!

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  • NeverDieN Offline
    NeverDieN Offline
    NeverDie
    Hero Member
    wrote on last edited by NeverDie
    #1

    Trying to enlarge some holes on an incorrectly fab'd PCB. I have a 1mm diameter drlll bit, but it turns out none of my drills will hold it--their chucks have a more than 1mm diameter void when closed. I never knew until now, when the chips are down. So, for the future, what drills will hold small bits like this?

    As a one-off, I held the bit with a pair of pliers and crudely rotated the PCB around it to drill the 3 holes, but it was awkward and I never want to have to do that again. As a one-off, it did work though.

    monteM 1 Reply Last reply
    1
    • NeverDieN NeverDie

      Trying to enlarge some holes on an incorrectly fab'd PCB. I have a 1mm diameter drlll bit, but it turns out none of my drills will hold it--their chucks have a more than 1mm diameter void when closed. I never knew until now, when the chips are down. So, for the future, what drills will hold small bits like this?

      As a one-off, I held the bit with a pair of pliers and crudely rotated the PCB around it to drill the 3 holes, but it was awkward and I never want to have to do that again. As a one-off, it did work though.

      monteM Offline
      monteM Offline
      monte
      wrote on last edited by monte
      #2

      @NeverDie https://www.aliexpress.com/item/32738503593.html special bits, that has the same diameter of the tail side, and will fit the standard drill. Or you can buy a drill with small jaws, or just another chuck, that will fit your drill.
      I am using dremel tool with a drill chuck bought separately https://www.dremel.com/us/en/p/4486-2615004486

      V 1 Reply Last reply
      2
      • monteM monte

        @NeverDie https://www.aliexpress.com/item/32738503593.html special bits, that has the same diameter of the tail side, and will fit the standard drill. Or you can buy a drill with small jaws, or just another chuck, that will fit your drill.
        I am using dremel tool with a drill chuck bought separately https://www.dremel.com/us/en/p/4486-2615004486

        V Offline
        V Offline
        virtualmkr
        wrote on last edited by
        #3

        @monte Thank you for sharing, just ordered the bits.

        1 Reply Last reply
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        • mfalkviddM Offline
          mfalkviddM Offline
          mfalkvidd
          Mod
          wrote on last edited by
          #4

          A few turns of (Scotch) tape to make the drill bit fit might be good enough to beat the PCB rotation method.

          1 Reply Last reply
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          • P Offline
            P Offline
            PeteKnight
            wrote on last edited by
            #5

            You need a Pin Vice (or vise if you're across the pond and want to butcher the Queen's King's English)...

            https://www.ebay.co.uk/itm/143450664932?epid=2305158887&hash=item2166536fe4:g:g-AAAOSwnO1d2YjH&amdata=enc%3AAQAHAAAAoNgdTu9H35nxAzYb88y%2Bd%2BnDpgfsjI2QXCJzOGcO0bj4xAlrbUz9IScDEEydVAxUQ2Fv%2FQXkfPURAH3PWftlQIbAploXhvcmwP4%2F%2FY1YNgXeglqfwkTWyP%2BQkgvRuss8OI4OkverPgiUT%2BBftCZcFLqrm6LdeKgcz8uqo4pMxnLx4AtDgoQHTnSznUbSxLM4jDkUGLECVv%2Bqaptf8fgnWu0%3D|tkp%3ABk9SR8DLmJnqYA

            Pete.

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