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Thread: Lathe "work truing" tool

  1. #1
    Canobi's Avatar
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    Red face Lathe "work truing" tool

    This is one of those very handy tools you eventually use all the time, and it's very simple to make:



    I cobbled this tool together from items I had on hand, most of which is scrap I've salvaged from here n there so cost me time only, which wasn't very long.

    I considered a press fit for the bearings but decided to bolt them in place as it to give it more flexibility, I'm fixing up a mill I got recently and it can also be used as an edge finder.

    Job was simple, face, turn to size, drill, tap (M6 x 15), champfer, flip round, trim to length, repeat first four steps.

    In this case though, it was a bit large for my small quick change toopost holder:



    It held it very tightly though, so left it where it was and tried something new by doing a bit of light milling on the lathe. A 10mm two flute stub end mill took care of the cutting and just judged the cut depth by feel and eye, which went well all considered:



    I then cleaned up the edges? flipped it round and it was a perfect fit:



    For those that don't know how this kind of tool works on a lathe, here is a short demonstration video I made:

    Last edited by Canobi; 06-19-2017 at 09:00 AM.
    It's not the destination but the journey you take to get there that matters.

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  3. #2
    olderdan's Avatar
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    This is a well known tool but well worth posting for those yet to discover it and nicely presented.
    I assume the other bearing is for bar stock, unlike face truing this needs some care as it works like a wobbler in reverse. In this use the bearing can not move so the work will if going slightly over centre try to climb over the bearing, nuff said.
    Maybe useful also to mention re tightening the jaws after use.
    I hope this is taken in the spirit of being helpful for the novice turner.

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  5. #3
    Canobi's Avatar
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    Quote Originally Posted by olderdan View Post
    This is a well known tool but well worth posting for those yet to discover it and nicely presented.
    I assume the other bearing is for bar stock, unlike face truing this needs some care as it works like a wobbler in reverse. In this use the bearing can not move so the work will if going slightly over centre try to climb over the bearing, nuff said.
    Maybe useful also to mention re tightening the jaws after use.
    I hope this is taken in the spirit of being helpful for the novice turner.
    Absolutely, I am that novice turner lol, so thank you for mentioning the extra details I forgot to include.
    It's not the destination but the journey you take to get there that matters.

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    I am a novice novice turning and I do not see what it does.

    But thanks for posting, eventually I usually catch on.

    Ralph

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    Smile No Time to expalin... Just get in.

    Quote Originally Posted by olderdan View Post
    This is a well known tool but well worth posting for those yet to discover it and nicely presented.
    I assume the other bearing is for bar stock, unlike face truing this needs some care as it works like a wobbler in reverse. In this use the bearing can not move so the work will if going slightly over centre try to climb over the bearing, nuff said.
    Maybe useful also to mention re tightening the jaws after use.
    I hope this is taken in the spirit of being helpful for the novice turner.
    Every time I see your avatar, the little white pooch, I think of the attached file. So I decided you need to see it.

    If you left click on it, it should get bigger.

    Regards,

    Ed
    Attached Thumbnails Attached Thumbnails Lathe "work truing" tool-no-time.jpg  

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  9. #6
    Canobi's Avatar
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    Quote Originally Posted by Ralphxyz View Post
    I am a novice novice turning and I do not see what it does.

    But thanks for posting, eventually I usually catch on.

    Ralph
    Did you watch the demo vid, it shows you how it's used (well one side of it anyway)?
    It's not the destination but the journey you take to get there that matters.

  10. #7
    Ed ke6bnl's Avatar
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    I made one a while back and use it often.
    1950 F1 street rod
    1949 F1 stock V8 flathead
    1948 F6 350 chevy/rest stock, no dump bed
    1953 chevy 3100 AD for 85 S10 frame going for a 4BT cummins motor, NV4500
    1968 Baha Bug with 2.2 ecotec motor, king coil-overs,P/S
    2000 National Sea Breeze 5th wheel trailer
    1998.5 Dodge 2500 4x4 Cummins,

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    Yup, I watched it but did not see anything but the bearing rotating, what am I supposed to be seeing.

    What does the tool do?

    A few words and then the video might make sense.

    Sorry but I am brand new to using a lathe.

    I do not see where this would "true a lathe" it might indicate a lathe not being "true" or being true.

    I do not understand a "trueing tool".

    I can see how it might be used to indicate a tool post, if the tool post/tool holder was not perpendicular to the face of the
    test piece that would be obvious, but that is an indicator not a trueing tool.

    Ralph
    Last edited by Ralphxyz; 06-19-2017 at 08:11 PM.

  12. #9

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    Ralph, you may be over thinking this.... If you notice the title of the original post ... Lathe "work truing" tool . This tool is used to true the "work" that is in the chuck. If you look at the video again, you should see that at the start of the video, the item in the chuck is far from true but after making contact with the bearing... it is repositioned in the chuck and no longer wobbles. The tool trues the work... not the lathe or any component of the lathe.

    Hope this helps,

    Regards,

    Ed

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  14. #10
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    Thanks Canobi! We've added your Lathe Truing Tool to our Lathe Accessories category,
    as well as to your builder page: Canobi's Homemade Tools. Your receipt:




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