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  • Drilling a cast iron enameled sink

    for those of you that have never drilled an enameled cast iron sink, here's the steps involved.

    it a 3 step process.



    #1 drill the 1/4'' pilot hole through the enamel and cast iron sink.

    #2 drill the porcelain/ enamel with the carbide porcelain cutter. this is a spring loaded diamond shaped bit designed to score through the enamel and limit the chipping to within the scored area.


    #3 drill through the inner circle with the carbide cutter. this will cut through the porcelain and cast iron.



    make sure to keep the area as dry as possible to prevent the cast iron dust from rusting into the sinks finish. also notice the magnet i keep there to collect the shavings.

    also verify that there are no casting webs where you plan on drilling as it would be difficult to tighten the fixture with a hunk of cast iron protruding below.

    also practice on a scrap sink first as 1 mistake or chip will require an expensive replacement. this could be a granite top, tile, or self rimming sink.

    the 3 piece kit is sold by relton and comes in a variety of sizes. this one was 1.25''. most common for sinks. i also have a 1.75'' cutter.

    this particular job was for an electrician who was installing an ise disposal air switch. all i did was the drilling. took 10 minutes plus the 2 phone calls from adam

    rick.
    Attached Files
    Last edited by PLUMBER RICK; 04-01-2009, 02:09 AM.
    phoebe it is

  • #2
    Re: Drilling a cast iron enameled sink

    What was the RPM on the drill?

    Comment


    • #3
      Re: Drilling a cast iron enameled sink

      Two phone calls?
      The second one was because you started talking again during the disconnect process of the previous one.

      Thanks for the tip on the little reel for the 1/8" jetter leader,it works great for the price.But when someone says goodbye you can expect a callback when you start talking when it's too late to catch the flip of the phone.Especially when I know how much you like the guy outside of yours and mine's area.


      Back in the eighties we found it cheaper to drill a seven foot "lime green" kohler caribbean and plumb the jaccuzzi in ourselves.The homeowner was cool with the posssibility of a wild chip so it took off the stress.

      Comment


      • #4
        Re: Drilling a cast iron enameled sink

        did the same thing with my parents kohler tub.

        had it drilled and plumbed in copper for the spa.

        it's ok adam, it was a flat rate drill charge


        bill, as far as speed goes, i like the 1/2'' milwaukee magnum drill that maxes out around 600 rpm.

        for the 1/4'' pilot i use medium speed to drill the porcelain and cast. for the porcelain cutter i use slow speed and easy pressure as it's spring loaded. i watch the cutting and will rock as needed to assure a full circle score. typically the area i drill is not perfectly flat.

        the last hole, i start off slow to clear the inner porcelain and speed up on the 1/4'' cast. slow also keeps the dust down.

        keep the magnet handy and keep it dry and clean.

        of the 100 or so holes, i've been very lucky

        rick.
        phoebe it is

        Comment


        • #5
          Re: Drilling a cast iron enameled sink

          That sure looks like my Relton porcelain cutter kit. Have you been in my tool box again?

          Mark
          "Somewhere a Village is Missing Twelve Idiots!" - Casey Anthony

          I never lost a cent on the jobs I didn't get!

          Comment


          • #6
            Re: Drilling a cast iron enameled sink

            Nice little tutorial Rick.

            Comment


            • #7
              Re: Drilling a cast iron enameled sink

              I like your what looks to be a homemade welded arbor.

              Comment


              • #8
                Re: Drilling a cast iron enameled sink

                Do you use tape or something to keep the bit from wandering?

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                • #9
                  Re: Drilling a cast iron enameled sink

                  Originally posted by ToUtahNow View Post
                  That sure looks like my Relton porcelain cutter kit. Have you been in my tool box again?

                  Mark
                  when he gives it back can to send it to me i need to add a hole
                  Charlie

                  My seek the peek fundraiser page
                  http://observatory.mountwashington.o...nal&fr_id=1040


                  http://www.mountwashington.org/weather/conditions.php

                  new work pictures 12/09
                  http://public.fotki.com/hvachawk/

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                  • #10
                    Re: Drilling a cast iron enameled sink

                    Originally posted by ToUtahNow View Post
                    That sure looks like my Relton porcelain cutter kit. Have you been in my tool box again?


                    Mark
                    not yet, but maybe saturday

                    Originally posted by TozziWelding View Post
                    I like your what looks to be a homemade welded arbor.
                    not homemade. it's available from relton.

                    Originally posted by EasyEman View Post
                    Do you use tape or something to keep the bit from wandering?

                    the 1/4'' pilot hole will bite pretty easy into the porcelain. once it does. the rest of the bits will follow since their arbor is a smooth bore.

                    rick.
                    phoebe it is

                    Comment


                    • #11
                      Re: Drilling a cast iron enameled sink

                      Not an enamal sink but this baby will drill anything else
                      Mag Drill pix.
                      Set up and ready to go

                      Cutting

                      Finished hole

                      The bits


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                      • #12
                        Re: Drilling a cast iron enameled sink

                        Hi Tozz, bought one about 1 1/2 years ago. How did I ever get by without one!
                        Nice, upside down on a flange
                        I can build anything You want , if you draw a picture of it , on the back of a big enough check .

                        Comment


                        • #13
                          Re: Drilling a cast iron enameled sink

                          I'm assuming that's an electromagnetic frame drill?


                          I was always concerned about the heat created by drilling cast iron, and the possibility of te ceramic cracking days/weeks/months later after I did it.
                          Last edited by DUNBAR PLUMBING; 04-02-2009, 10:43 PM.
                          Northern Kentucky Plumbers Twitter Feed | Plumbing Videos

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                          • #14
                            Re: Drilling a cast iron enameled sink

                            Originally posted by DUNBAR View Post
                            I'm assuming that's an electromagnetic frame drill?
                            Sure is a mag drill. We use a chain when drilling out of position. One of the little red headed Haggerty kids might pull the plug!
                            I can build anything You want , if you draw a picture of it , on the back of a big enough check .

                            Comment


                            • #15
                              Re: Drilling a cast iron enameled sink

                              Originally posted by toolaholic View Post
                              Sure is a mag drill. We use a chain when drilling out of position. One of the little red headed Haggerty kids might pull the plug!
                              What does all of this mean? Ignorant to Mag drills.

                              J.C.

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