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  1. #1
    Join Date
    Jul 2008
    Location
    near Warragul, Victoria
    Posts
    3,718

    Default Taper turning attachment

    This project might suit the Hercus . It appears to be based on the SB 9 lathe

    Homemade taper attachment | The Hobby-Machinist - The FRIENDLY Machinist Forum

  2. #2
    Join Date
    Jan 2004
    Location
    Mackay North Qld
    Posts
    6,446

    Default

    I have same article and its another gunadoo that will wait until the lathe gets moved into the shed. At the moment it is in the garage and too close to the wall to access properly.It certainly seems a very cost effective upgrade.

  3. #3
    Join Date
    Oct 2004
    Location
    Southern Highlands NSW
    Posts
    1,894

    Default

    There's another TTA design that has been mentioned on this forum, with plans in a PDF file of about 1MB, to suit Hercus.
    The designer Bernie O'Dea claims advantages over a conventional TTA.
    I can't find it here now, but I have a copy I can send anyone who asks.

    Jordan

  4. #4
    Join Date
    Jan 2004
    Location
    Mackay North Qld
    Posts
    6,446

    Default

    The rice planter and the fork lever doover appeal to me as they are low tech.
    In third world countries they are relatively easy to make and save the operator a lot of back breaking work while improving productivity.

    I am a sucker for simple but useful mechanisms.

  5. #5
    Join Date
    Jan 2014
    Location
    Northern Beaches, NSW
    Posts
    288

    Default

    Quote Originally Posted by nadroj View Post
    There's another TTA design that has been mentioned on this forum, with plans in a PDF file of about 1MB, to suit Hercus.
    The designer Bernie O'Dea claims advantages over a conventional TTA.
    I can't find it here now, but I have a copy I can send anyone who asks.

    Jordan
    Jordan,
    I'd be interested in those plans if you can lay your hands on them.


    Thx
    Jon

  6. #6
    Join Date
    Oct 2004
    Location
    Southern Highlands NSW
    Posts
    1,894

    Default

    Here's the Bernie O'Dea taper attachment.

    Bernie O'Dea Taper Attachment.pdf

    Jordan

  7. #7
    Join Date
    Aug 2006
    Location
    Melbourne
    Posts
    1,105

    Default

    Quote Originally Posted by nadroj View Post
    There's another TTA design that has been mentioned on this forum, with plans in a PDF file of about 1MB, to suit Hercus.
    The designer Bernie O'Dea claims advantages over a conventional TTA.
    I can't find it here now, but I have a copy I can send anyone who asks.

    Jordan
    So does this type have any disadvantages over a conventional TTA?

  8. #8
    Join Date
    Oct 2004
    Location
    Southern Highlands NSW
    Posts
    1,894

    Default

    On the face of it (not having one), it looks like there's no greater disadvantage than if you have a rear toolpost fitted (a bonus feature?).
    Needs to have a slotted cross slide though, or at least a flat one that can be drilled and tapped, to mount the auxilliary slide.

    Jordan

  9. #9
    Join Date
    Feb 2010
    Location
    Geelong
    Posts
    20

    Default

    Hi,

    The attachment appears to be above the lathe bed and doesn't use the low mounting point on the back of the bed that Hercus used for their attachment. It can be used with any lathe bed with a similar profile bed to the Southbend. Applicable to lathe beds with or without the taper turning attachment mounting point.

    The rear toolpost which I took to be a rear parting tool is not but is the cutting tool mounted upside down and on a dovetail slide controlled by the sine bar at the back.
    The cutting toolpost is on a freely moving dovetail slide which, as the text mentions, is not directly operated by the cross slide but is positioned from the rear. A sub-slide similar to what I believe may be found on larger lathes. It appears as though the turning tool is on the back to avoid any link passing under the work to be turned which would reduce the lathe swing even further than the T slot cross slide would.

    The details which would make or break this design would be the fine cross and the sinebar adjusters.

    --
    David

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