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Tru-Trace Lathe Tracing Attachment

Discussion in 'QUESTIONS & ANSWERS (Get Help Fast Here!)' started by Nels, Aug 7, 2011.

  1. Nels

    Nels United States Founder Staff Member H-M Supporter

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    Last edited by a moderator: Nov 19, 2011
  2. Tony Wells

    Tony Wells United States Vice President Staff Member Administrator

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    They are used on lathes to cut profiles and contours that would be difficult or near impossible manually. A flat template is created that mounts on it and contact is maintained on the template by a tracer pin that is connected to a hydraulic valve. The hydraulics control the X axis of the lathe, so that when you engage the Z axis feed, the cutting tool makes a cut that matches the template. The templates are a little tricky to make, as you have to allow for the contact pin diameter.

    I imagine that they aren't all that popular nowadays, with CNC all over the place, but at one time, production shops used them extensively. I ran one on an American Pacemaker for a while. Kind of boring after a few days of watching it. They don't thread, but turning and boring work they do pretty good.
     
  3. george wilson

    george wilson United States Global Moderator Staff Member Director

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    I have a little Lehigh(sp?) mechanical tracing attachment I've used for many years. It just is a hardened steel block with a built in linear bearing that moves the tool in and out. A follower stylus moves against a template you make from 1/8" steel flat stock.

    It has always worked just fine.
     
  4. 4gsr

    4gsr Global Moderator Staff Member Director

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    I don't claim to be an expert at this stuff, but that one on ebone has a missing piece to it. it's missing the template holder that holds your template.
    I threw away two tracer valves when I cleaned out my Dad's old shop when we sold the old homestead. :crying: years back.

    Ken
     
  5. Glmphoto

    Glmphoto United States Active User Active Member

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    Can we get a few photos of that unit?
     
  6. tarmo120

    tarmo120 Estonia Active User Active Member

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    I believe this is the same attachment that Keith Fenner is using on his big lathe.
    He has quite a few videos on how it works and shows.
     

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