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Thread: Parting tool

  1. #16
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    Notting Hiĺl (Melb) or Echuca
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    Quote Originally Posted by phaser View Post
    Question :
    What is the best, most forgiving type of parting tool ?
    As a novice, using a 9 inch Hercus, my learning is that a rigidly mounted blade is essential... and the only way it has worked for me is a rear mounted tool (upside down as mentioned) on a T slot cross slide. This has parted steel on Dad's lathe with little stress on me.
    Any attempt to use a front mounted parting blade on Ali or steel is definately something I will not repeat.
    Brass has been fine.
    So what ever tool and holder, rigidity is number one... Then of course, on centre and sharp and appropriate lube.
    cheers
    David

    ------------------------------------------------
    A society grows great when old men plant trees whose shade theyíll never sit in. (Greek proverb)

  2. #17
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    Jul 2016
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    Melbourne
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    30
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    Quote Originally Posted by Dave J View Post
    That looks great, but he does have a rigid machine.
    Always wondered why the factory supplied carbide parting tips don't come sharpened with the right side higher, so the part comes off first nice and flat and the nib is left on the stock and removed after the part has left.
    I always sharpen my HSS this way.
    Most of my carbide parting tips are formed with the right side slightly higher and further forward, most of them are taegutec.

  3. #18
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    Jan 2019
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    Adelaide
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  4. #19
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    Quote Originally Posted by caskwarrior View Post
    Most of my carbide parting tips are formed with the right side slightly higher and further forward, most of them are taegutec.
    Never have known that, good to know thanks. The one I have from many years ago is straight.
    Using Tapatalk

  5. #20
    Join Date
    Nov 2012
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    Mid North Coast NSW
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    Quote Originally Posted by 4me View Post
    I bought one of those a while back.
    It leaves an aweful rough surface on the face so no good..

  6. #21
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    Nov 2012
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    Mid North Coast NSW
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    Quote Originally Posted by Dave J View Post
    Never have known that, good to know thanks. The one I have from many years ago is straight.
    I have 2 or 3 already HSS tools that are sharpened that way but they don't have much of a reach. I can only part small stuff with them and so I need one that will go a lot further.

  7. #22
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    Nov 2012
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    Mid North Coast NSW
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    I know my mini lathe is 8mm tool height but my AL350A is something weird like 14 or 16 mm. I'll have to check.

  8. #23
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    Jan 2019
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    Adelaide
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    Quote Originally Posted by phaser View Post
    I bought one of those a while back.
    It leaves an aweful rough surface on the face so no good..
    Yes, one surface is rough the other a lot better, I guess it comes down to making sure the blade is lined up perfectly with the cross slide. I don't worry about it so much just face the rough end.

  9. #24
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    Nov 2012
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    Quote Originally Posted by 4me View Post
    Yes, one surface is rough the other a lot better, I guess it comes down to making sure the blade is lined up perfectly with the cross slide. I don't worry about it so much just face the rough end.
    No both surfaces end up very rough and with pitting and galling.

  10. #25
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    sydney ( st marys )
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    The tool may not be sharpened correctly or set correctly or there maybe an issue with machine ridgidity, is the tool cutting through the material okay or are you hearing or feeling a binding sound, are you parting with feed and using coolant, what material are you parting,and if under power what diameter, speed and feed are you using.
    Is the tool set up to part close to the chuck?
    Do you have minimal over hang of the tool?

  11. #26
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    Nov 2012
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    Mid North Coast NSW
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    The AL350A has a tool height of 18mm.

  12. #27
    Join Date
    Jan 2004
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    Mackay North Qld
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    4,694

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    Tubal Cain,the American one, AKA Mr Pete has a U Tube video.

    https://www.youtube.com/watch?v=w0N6K9y2i2M

    It reinforces many comments made here, but worth watching.

    Grahame

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