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Thread: "Old timers" has set in...

  1. #1
    Join Date
    Dec 2009
    Location
    Newnan, GA
    Posts
    503

    "Old timers" has set in...

    I need to cut a 10" X 10" hole in a piece of plywood. I'll be using my PC690 and a guide bushing. The OD of my bushing is 1/2" and using a 1/4" straight bit. I get the difference as 1/8" (1/2" minus 1/4" divided by 2). Pretty straightforward so far.

    Do I cut my template 10" plus 1/8" or 10" plus 1/4"?? Can't seem to wrap my foggy brain around this. Guess I could cut one and find out but no need if you can help.

    Thanks in advance for your help.

    joe
    "When the horse is dead, GET OFF."

  2. #2
    Join Date
    Dec 2012
    Location
    Bedford, NH
    Posts
    1,286
    1/4" (=1/8" each side)
    Thoughts entering one's mind need not exit one's mouth!
    As I age my memory fades .... and that's a load off my mind!

    "We Live In The Land Of The Free, Only Because Of The Brave"
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  3. #3
    Join Date
    Mar 2012
    Location
    Napa Valley, CA
    Posts
    916
    Yes, 1/8" offset on each side = 1/4" total

    Easier on the router (and bit) if you rough-out with a jigsaw and only clean up the last 1/8" or so with the router

  4. #4
    Join Date
    Dec 2009
    Location
    Newnan, GA
    Posts
    503
    Thanks Al and Jerry. 1/4" is what I was thinking but couldn't convince myself of it. I appreciate the help.
    "When the horse is dead, GET OFF."

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