Molding duplication problem.

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  • LCHIEN
    Internet Fact Checker
    • Dec 2002
    • 20977
    • Katy, TX, USA.
    • BT3000 vintage 1999

    Molding duplication problem.

    Need to make some toe molding to match for Daughter's house.
    .75" x 1.57" overall the two upper left roundover radii are 3/32" and 3/16".

    I'm figuring the only way to make something close is the left sketch two pieces glued together but you get a square inside curve instead of an S-curve like the sample shown.

    Is there any reasonable way to make the inside part of the S-curve to look like the sample and the sketch on the right? Other than a custom molding bit. Can't even use a standard roundover bit which makes a 90 part of the curve and I only want about 45 of arc. And then the inside curve needs 135 of arc.

    I'm thinking making the glue-up two parter and then using a small bead of caulking smoothed with a fingertip to take away the sharp inside corner. Still not perfect.


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    Attached Files
    Last edited by LCHIEN; 04-02-2024, 12:28 AM.
    Loring in Katy, TX USA
    If your only tool is a hammer, you tend to treat all problems as if they were nails.
    BT3 FAQ - https://www.sawdustzone.org/forum/di...sked-questions
  • GrumpyDad
    Established Member
    • Jul 2020
    • 165
    • Midwest
    • Ryobi BT3100, BT3000, Sawstop PCS

    #2
    Check if your local cabinet shops have a Woodmaster planer/molder machine. They make hundreds of heads that can crank out miles of molding


    Attached Files
    Harumpf!
    GrumpyDad

    Comment

    • LCHIEN
      Internet Fact Checker
      • Dec 2002
      • 20977
      • Katy, TX, USA.
      • BT3000 vintage 1999

      #3
      Originally posted by GrumpyDad
      Check if your local cabinet shops have a Woodmaster planer/molder machine. They make hundreds of heads that can crank out miles of molding

      Yeah, they only need 10 feet.
      Loring in Katy, TX USA
      If your only tool is a hammer, you tend to treat all problems as if they were nails.
      BT3 FAQ - https://www.sawdustzone.org/forum/di...sked-questions

      Comment

      • mpc
        Senior Member
        • Feb 2005
        • 981
        • Cypress, CA, USA.
        • BT3000 orig 13amp model

        #4
        Ever make a "scratch stock" tool? Basically grind a piece of stiff sheet metal into the shape you want and drag it, held at an angle like a card scraper tool, over the workpiece multiple times to make the shape. For the shape you need, the table saw and a dado stack can remove the rabbet-like portion, then trim that upper corner with a router round-over bit. Then use the scratch stock to create the "S" shape. buzzing off a corner left when making the rabbet.

        That's what I'd try.

        Another option that just popped into my head: a bowl-and-tray router bit might be able to make the rabbet leaving a rounded inside corner, then you'd simply need basic round-over bits.

        mpc

        Comment

        • Black walnut
          Administrator
          • Aug 2015
          • 5451
          • BT3K

          #5
          Cut the filet out with a dado blade or two passes with table saw. Use a plunge ogee for the inboard roundover and a roundover for the top roundover.
          just another brick in the wall...

          Boycott McAfee. They placed an unresponsive popup on my pc.

          Comment

          • leehljp
            Just me
            • Dec 2002
            • 8441
            • Tunica, MS
            • BT3000/3100

            #6
            Not quite what you want but similar:


            This one might work, but the position is the key:
            Findbuytool's industrial grade traditional table edge router bits are in stock and ready to ship today. Use our bits to create decorative profiles on various tables, such as desk tops, coffee tables and end tables. Suitable for all router tools.
            Hank Lee

            Experience is what you get when you don't get what you wanted!

            Comment

            • LCHIEN
              Internet Fact Checker
              • Dec 2002
              • 20977
              • Katy, TX, USA.
              • BT3000 vintage 1999

              #7
              So this is what I came up with. Two piece molding instead of one. The small roundover is more like 1/8" than my original guess of 3/32".

              The blue painted one is the original; the unfinished one is the clone.

              If they don't like the square inside curve, I'll put a bead of caulking in it smoothed with a fingertip.

              It won't be adjoining existing molding directly, it will be across the room.
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              Last edited by LCHIEN; 04-05-2024, 01:24 AM.
              Loring in Katy, TX USA
              If your only tool is a hammer, you tend to treat all problems as if they were nails.
              BT3 FAQ - https://www.sawdustzone.org/forum/di...sked-questions

              Comment


              • capncarl
                capncarl commented
                Editing a comment
                Nothing wrong with filling in a corner with caulk. A plastic spoon makes a good tool for making the inside curve you are looking for.
            • dbhost
              Slow and steady
              • Apr 2008
              • 9229
              • League City, Texas
              • Ryobi BT3100

              #8
              Sorry, just now seeing this thread, and you came up with the solution I was going to recommend since it is painted, just ease the inside curve with some caulk...
              Please like and subscribe to my YouTube channel. Please check out and subscribe to my Workshop Blog.

              Comment

              • LCHIEN
                Internet Fact Checker
                • Dec 2002
                • 20977
                • Katy, TX, USA.
                • BT3000 vintage 1999

                #9
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                Here's a test bead. Is DAP latex trim caulk the right stuff? Lasts a long time?

                Needs to be a little thicker, I think, I just used a finger tip.
                Attached Files
                Last edited by LCHIEN; 04-08-2024, 03:53 PM.
                Loring in Katy, TX USA
                If your only tool is a hammer, you tend to treat all problems as if they were nails.
                BT3 FAQ - https://www.sawdustzone.org/forum/di...sked-questions

                Comment


                • capncarl
                  capncarl commented
                  Editing a comment
                  Prime before caulking.

                • LCHIEN
                  LCHIEN commented
                  Editing a comment
                  Prime before caulking? Sounds like sound advice.
              • LCHIEN
                Internet Fact Checker
                • Dec 2002
                • 20977
                • Katy, TX, USA.
                • BT3000 vintage 1999

                #10
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                Glued the strips to the larger piece and also used a pin nail every foot or so and then clamped lots of clamps because the thin piece was only .150" thick and needed it to be flush tot the larger piece.

                30 feet all done. Except for the caulking of the inner joint after priming.

                Impressed myself. 24 year old BT3000 cut a lot of deep rips over 1-1/2 inches thick without any issue. Each 6-foot board required about 4-5 deep long rips.
                Last edited by LCHIEN; 04-16-2024, 12:43 AM.
                Loring in Katy, TX USA
                If your only tool is a hammer, you tend to treat all problems as if they were nails.
                BT3 FAQ - https://www.sawdustzone.org/forum/di...sked-questions

                Comment

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