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The Perfect Circle

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  • #161389
    thedude306
    Moderator
    Foam Lake, SK

    I forgot I had this little gem and pulled it out for my breakdown table. I got it for making speaker holes but it quite the little jig and really easy to use. Does a 14.5″ R max circle and 1.5″ min.

    Brad T
    Self employed Pro since 2014!!

    #161399

    That looks nice, Brad. Are the holes standard PC base? Looks like it is made out of aluminum or something.

    Orange County, CA

    #161418
    theamcguy
    Pro
    Fayetteville, NC

    That looks really nice. How does it work?

    Automotive Pro
    Fayetteville, NC
    (and also the World's Fastest Poster)

    #161456

    I will let Brad weigh in, but you put a nail or screw in the hole on the arm and that acts as a pivot. You secure the router to the other end, center the bit in the hole and then you change the diameter of the cirlce with the knob and move the router closer or farther aware from the pivot. Lock it down when you have the diameter you want and away you go.

    Orange County, CA

    #161461
    thedude306
    Moderator
    Foam Lake, SK

    yup, that’s exactly it. I put a roll pin in the end so I drill a pilot hole and away you go. Standard PC holes that are going to get the treatment for the bosch.

    Brad T
    Self employed Pro since 2014!!

    #161469
    jponto07
    Moderator
    Bloomington, IN

    Definitely a useful jig to have. I saw one at Rockler a while back and decided to make one from some stuff lying around the shop.

    Also made a table mounted router version. I’ll post a pic if I can locate one. The table mounted version relies on a straight bit with a bearing.

    Jon P.
    Timber Carpentry & Construction
    https://www.facebook.com/timbercarpentry/
    Instagram

    #161476
    jponto07
    Moderator
    Bloomington, IN

    I found it. It’s a JP Thein design…

    http://www.jpthien.com/cj.htm

    I’ve built both router jigs and a variation of his separator from the information on his website. IMO, it’s worth the read.

    Edit: correction, JP Thein apparently did not post plans on how to make a circle jig for a hand held router, just a table mounted version.

    Jon P.
    Timber Carpentry & Construction
    https://www.facebook.com/timbercarpentry/
    Instagram

    #161489
    RonW
    Pro
    Holladay, Tn

    I have seen the perfect circle a few time. Always tell myself I gonna get one. For some reason I never have.

    Ron

    A Working Pro since 1994!

    Member since March 26, 2014.

    #161491
    ChadM
    Moderator
    East Palestine, Ohio

    The perfect circle is a nice jig. I have a couple in the shop that I made out of plywood – a smaller on that will do up to 15″ and a big one that does up to 42″.

    Chad

    A Working Pro since 1993

    Member since 12/07/2013

    #161521

    Sweet accessory! I have a shop made wood one that isn’t a worthy of a photo. ..lol!

    Andrew

    A Working Pro since 1995!

    Member since March 26, 2014.

    #161526

    I will definitely remember this jig should the day come when I need to make a perfect circle… Very cool!

    John S

    #161557
    DirtyWhiteBoy
    Pro
    Honolulu,, Hi.

    Oh that look like da kine for the circles.
    What do you hook up a router to it?

    Dirty

    A Working Pro since 1988!

    Member since January 26, 2013.

    #161586
    thedude306
    Moderator
    Foam Lake, SK

    Made out of AL and I will get some shots of the router hooked up and of it in action.

    Brad T
    Self employed Pro since 2014!!

    #161603
    NJBuilder
    Pro
    Brick, NJ, 500,000 HAM

    I’ve never made a perfect circle but never needed too either lol

    #161853
    Anonymous
    Inactive

    Looks really cool, Made out of AL it will last forever

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