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  1. #1
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    Apr 2012
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    Default Parting the easy way

    There has been a bit of chatter in here recently about parting, this addition to your parting tool will simplify parting on pretty much any problem lathe, it stops HSS and carbide digging in and chipping and parting can be performed a considerable distance from the chuck without tailstock support.

    Some pics below and a short vid here https://www.youtube.com/watch?v=hsBhJXjB8fA

    The 1st parting block was a bought one and i just welded some lugs onto it then fitted a blade and linished it flat for the support bracket to sit flush against. It worked pretty good so I made one to hold a carbide blade.
    Attached Images Attached Images

  2. #2
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    Sep 2012
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    Default

    Hi John, Guys,

    Neat idea, using the work piece as a steady rest ! Very effectively stopping dig in.
    Best Regards:
    Baron J.

  3. #3
    Join Date
    Dec 2013
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    Default

    Great idea, I might give it a try.
    I wonder if 1- 2 bearing wheels would be better than a block to not mark any surface being parted off.
    Using Tapatalk

  4. #4
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    Nov 2007
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    melbourne australia
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    Default

    Quote Originally Posted by shedhappens View Post
    There has been a bit of chatter in here recently about parting
    Tee-hee. Nice idea John.
    Chris

  5. #5
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    Default

    Quote Originally Posted by BaronJ View Post
    Hi John, Guys,

    Neat idea, using the work piece as a steady rest ! Very effectively stopping dig in.
    Hi John,
    Newtons 3rd law states that for every action (force) there is an equal and opposite reaction, it was just a matter of
    putting those forces close together.

  6. #6
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    Default

    Quote Originally Posted by Dave J View Post
    Great idea, I might give it a try.
    I wonder if 1- 2 bearing wheels would be better than a block to not mark any surface being parted off.
    Hi Dave, yeah maybe.... but then you would need some sort of slide for the brgs to attach to so the tool could be advanced into the job.
    The brass slide was a simple choice, i did throw around other ideas before making the one for the carbide insert blade but decided i liked the simplicity of the bronze slide. It sits on the stock not the part and seems to do the job.
    If you can come up with better ideas that would be gr8, these 2 were what i made a while ago and always thought of them as unfinished prototypes....

  7. #7
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    Default

    Quote Originally Posted by jack620 View Post
    Tee-hee.
    Chris i always thought that you were smarter than the average bear

  8. #8
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    Dec 2013
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    Quote Originally Posted by shedhappens View Post
    Hi Dave, yeah maybe.... but then you would need some sort of slide for the brgs to attach to so the tool could be advanced into the job.
    The brass slide was a simple choice, i did throw around other ideas before making the one for the carbide insert blade but decided i liked the simplicity of the bronze slide. It sits on the stock not the part and seems to do the job.
    If you can come up with better ideas that would gr8, these 2 were what i made a while ago and always thought of them as unfinished prototypes....
    Had a few beers tonight, so wasn't thinking of the roundness of the stock up and down as parting off.
    Using Tapatalk

  9. #9
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    Aug 2019
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    Revesby - Sydney Australia
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    I don't understand what this does, apart from steading the work piece in one direction.


    Why not just use a steady, which would do it in 3 directions?

  10. #10
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    Much quicker to setup than a steady. And you don't need to steady the workpiece in three directions anyway. The workpiece wants to move up when it encounters the parting blade.
    Chris

  11. #11
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    Quote Originally Posted by jack620 View Post
    The workpiece wants to move up when it encounters the parting blade.
    Mostly.

    On a bad day in my youth, I made the job bend up on top of the blade.
    Bounce, wobble, bend.



    I always thought two hacksaw blades, in a custom frame, was the foolproof solution.
    One on top, one underneath, tapered toward each other.
    You slide it from the large gap toward the small.

  12. #12
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    Sep 2010
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    Lebrina
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    Excellent idea that would be an absolute game changer where thin shafts and/or smaller lathes were concerned.
    Simple and effective.

  13. #13
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    Quote Originally Posted by Karl Robbers View Post
    Excellent idea that would be an absolute game changer where thin shafts and/or smaller lathes were concerned.
    Simple and effective.
    Hi Karl, I think they could be made larger if there was a requirement, the ones in this post will do 60mm diameter, the carbide one I use on my CL410, for example I can hang 300mm of 50mm dia stock out of the chuck and work my way down the length slicing off 1/4" spacers, using a centre to support while parting is a bit hairy and slow.

  14. #14
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    Sep 2004
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    Dardanup W.A.
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    Quote Originally Posted by nigelpearson View Post
    Mostly.

    I always thought two hacksaw blades, in a custom frame, was the foolproof solution.
    One on top, one underneath, tapered toward each other.
    You slide it from the large gap toward the small.
    That has to be an improvement on standing behind the lathe with a std. hacksaw, in which the blade has been reversed. That has been my go to parting method for some time

  15. #15
    Join Date
    May 2018
    Location
    Cairns, Qld.
    Posts
    41

    Default Parting Off Tool Support

    Great idea with the support above the work.

    This method works well for me on a basic hss tool...

    011.jpg 012.jpg Definitely helps prevent the tool nodding downwards.

    I haven't seen one of those split tools shown in another post for years. Are they still available anywhere?

    Just yesterday I received the more up to date inserted carbide-tip tool that I'd ordered last week. A quick test on some aluminium round showed a remarkable performance. Un-necessary to use the jack screw thingy of course.
    H614

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