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  1. #16
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    Jul 2005
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    The truing up (brass jaws) could work, but they would have to be at least partially clamped on something to take up the slack in the scroll mechanism of the chuck.
    A simple method that is used in many engineering shops. Is to open the jaws on to an old bearing ring ie the outer part of a ball bearing. Then machine the inside of the jaws, as the bearing ring is ground and hardened it makes an ideal mandrel to hold the jaws true for machining.

    What I like about idea is that its simple and effective and thats hard to beat.
    Inspiration exists, but it has to find you working. — Pablo Picasso


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  3. #17
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    Sep 2008
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    Texas
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    Thanks Artme and Hughie. I appreciate your replies.

    Would really like to build Ad's oval turning device, but I visualize it with roller bearings, ball bushings, hardened and ground "slider" shafts, etc. But that would take some $$ and a machine shop. Sadly I have neither. It's a great design, elegant in its simplicity.
    Richard in Wimberley

  4. #18
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    Flinders Shellharbour
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    Hi Tex,

    have a look at this link, they are over your way and by far the cheapest I have found on line, might be do-able over time with this mob

    http://www.vxb.com/ballbearings.html...FQkwpAodTWwj1g
    Inspiration exists, but it has to find you working. — Pablo Picasso


  5. #19
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    Sep 2008
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    Texas
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    Hi Hughie,
    Thanks for the link (added to my favorites list). They have a lot of good stuff. I can do metric. Same as inches only different. Looks like the device could be built for less than $250 US for parts. Maybe another hundred to have some steel plasma cut and a little machine work. A great little machine design project like I used to love about 20+ years ago. Doubt if I could get funding approval from the Chief, but will keep thinking about it.
    Richard in Wimberley

  6. #20
    Join Date
    Jan 2008
    Location
    the Netherlands
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    83
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    Richard, a simple and effective solution for turning finials.
    Looks great.
    Ad

  7. #21
    Join Date
    Nov 2007
    Location
    belgrave
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    61
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    Brilliant!
    anne-maria.
    T
    ea Lady

    (White with none)
    Follow my little workshop/gallery on facebook. things of clay and wood.

  8. #22
    Join Date
    Sep 2008
    Location
    Texas
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    Thanks Ad and T.L. Appreciate your response.
    Richard in Wimberley

  9. #23
    Join Date
    Apr 2007
    Location
    Adelaide Hills, South Australia
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    4,337

    Default

    Quote Originally Posted by Ozkaban View Post

    Clever idea. I'm impressed you managed to get them to centre so well.
    ...on the idea Texian.

    But, is it so critical about the jaws being exactly on centre if the piece doesn't have to be remounted? Worst that can happen is that you lose a tad off the possible width of your blank.

    ...
    Stay sharp and stay safe!

    Neil



  10. #24
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    Sep 2008
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    Texas
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    Quote Originally Posted by NeilS View Post
    But, is it so critical about the jaws being exactly on centre if the piece doesn't have to be remounted? Worst that can happen is that you lose a tad off the possible width of your blank.
    Not critical at all Neil. At least not for me. I did not mean to suggest that mine center perfectly, just close enough that the wood looks well centered by eyeball. I use the tailstock and a center mark to align that end of the blank before tightening the jaws. I did make a half dozen practice finials. One was not too bad and the rest were mediocre. More practice needed.
    Richard in Wimberley

  11. #25
    Join Date
    Nov 2007
    Location
    Dundowran Beach
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    76
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    19,922

    Exclamation

    Just had a squirt around the internet and came across the Beale Chuck Puck.

    Solves the problem if holding 3/4" and 1" square stock very nicely. Have a squizz for yourself.

  12. #26
    Join Date
    Sep 2008
    Location
    Texas
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    That's a dandy little doodad, and only US$12, plus shipping of course. But what if all your stock is 7/8". I know, rip it down to 3/4". Thanks Artme. A very handy item for those who can't or would just rather not make their own.
    Richard in Wimberley

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