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  1. #1
    Join Date
    Aug 2008
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    Tennant Creek, Aust
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    Default How to Hold This?

    I have this piece of aluminium 140 x 20mm
    That I would like to if possible to cut out the 70mm centre so I can use it later.
    My problem is that I don’t have a chuck large enough, is any I hold it on a 9 x 20 lathe?





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    Ratty 05/2004 -05/07/2010 COOPER 01/08/1998-31/01/2012

  2. #2
    Join Date
    Aug 2011
    Location
    Melbourne
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    4,779

    Default

    Mount on a face plate and trepan it?

    Or mount on a rotary table and gang drill using 5mm drill bit.

    Or, measure out, centre punch and drill on a drill press. Then use a jig saw.

    Simon

    Sent from a galaxy far far away
    Girl, I don't wanna know about your mild-mannered alter ego or anything like that." I mean, you tell me you're, uh, super-mega-ultra-lightning babe? That's all right with me. I'm good. I'm good.

  3. #3
    Join Date
    Jun 2007
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    Vic
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    48
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    544

    Default

    how about holesaw?
    I have done 1" thick with holesaw before

    20170706_185615.jpg

    20170706_203028.jpg

  4. #4
    Join Date
    Oct 2008
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    N.W.Tasmania
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    1,407

    Default

    Quote Originally Posted by simonl View Post
    Mount on a face plate and trepan it?


    Sent from a galaxy far far away
    If you don't have a faceplate, you could always mount as large as reasonably possible stub of round bar, or even a chunky piece of plate into the largest chuck that you have, face it off and then use cyanoacrylate adhesive to mount your aluminium workpiece. If trepanning you could use the tailstock for support, or if using a holesaw, obviously that is not so easy to arrange additional support, but the holesaw itself becomes the support at the cost of "the dump" being left with a hole in it. Good luck.

  5. #5
    Join Date
    Nov 2007
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    melbourne australia
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    3,228

    Default

    So the 70mm centre piece is the waste that you want to keep for a future project? What operations do you want to perform on the resulting ring after removing the centre?
    Chris

  6. #6
    Join Date
    Mar 2011
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    Southern Flinders Ranges
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    Default

    Holesaw in a drill press/mill or chuck it in a four jaw and holesaw in the tailstock if you can clear the jaws.
    Could also drill a small hole and cut the centre out with a scrolling blade in a jigsaw.

  7. #7
    Join Date
    Aug 2008
    Location
    Tennant Creek, Aust
    Age
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    Default

    Thanks for your replies every one, I never thought of using hole saws to cut that deep.
    My plan is to make a holder for a LED ring light to mount on my drill
    DSC_5325_zpsydugi2lx.jpg
    I used a hole saw took a while but got through OK.

    Ratty 05/2004 -05/07/2010 COOPER 01/08/1998-31/01/2012

  8. #8
    Join Date
    Nov 2017
    Location
    Geelong, Australia
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    57
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    2,651

    Default

    Good tip with using a holesaw on thick material is to drill one or more smaller holes that the holesaw teeth will cut into. Helps to clear the swarf out of the gullets of the teeth.

    Steve

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