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Thread: Here's a stupid question

  1. #1
    Join Date
    Feb 2008
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    Louisburg, KS
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    Default Here's a stupid question

    I want to make a Longworth Chuck like the pic attached. Getting the arcs right in Designer is a snap. Assigning the 3/16" cutting bit with a cut-thru gives me just the diameter of the bit. How do I make those cut-thrus larger than the diameter of my 3/16" cutting bit so they will accomodate a 1/4" bolt?
    Attached Thumbnails Attached Thumbnails Myoporum Bowl 1- 18 800.jpg  
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  2. #2
    Join Date
    Jan 2008
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    New Iberia, la.
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    Default

    go to lowes and get a 1/4" straight edging bit, assign a 3/16" to the project and install a 1/4; when ask to do. stair step the cut a 1/4" at a time for whatever thickness board.
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  3. #3
    Join Date
    Feb 2008
    Location
    Tucson, Arizona
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    Default

    Draw the closed arcs to size and apply a cutpath with a 1/8" bit and a .063" inset. You can adjust the size of the inset for a little wiggle room.
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    Last edited by SteveNelson46; 03-25-2017 at 10:28 AM.
    Steve

  4. #4
    Join Date
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    Default

    Steve.....can I do that with 1.187 Can't open your mpc.
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  5. #5
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    Default

    Never mind.....figured it out - thanks.
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  6. #6
    Join Date
    Nov 2008
    Location
    Vancouver Island
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    Default

    Even simpler, draw your arc. Copy and paste it onto itself. Select both arcs. Connect the ends. (Looks like one arc but it is now a closed double arc.) Apply the 3/16" cutting bit and give it a -1/32 inset.
    Attached Thumbnails Attached Thumbnails double arc.PNG  
    Attached Files Attached Files

  7. #7
    Join Date
    Feb 2008
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    Tucson, Arizona
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    2,401

    Default

    Here it is in 1.187
    Attached Files Attached Files
    Last edited by SteveNelson46; 03-25-2017 at 10:52 AM. Reason: Changed upload with correct file
    Steve

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