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46331Re: updated tool post / chuck / accuracy adjustments

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  • n5kzw
    Apr 2, 2007
      It might also be worthwhile to remove the chuck and put a DTI on the
      taper inside the spindle to ensure the spindle is not bent.


      --- In atlas_craftsman@yahoogroups.com, William Abernathy
      <william@...> wrote:
      > Bison (made in Poland makes the best cheap chuck in this size.
      Before you write
      > off your existing chuck, you should do the following:
      > 1) Inspect the mounting threads on both the chuck and the spindle to
      make sure
      > there's no swarf or other crud there throwing you off.
      > 2) Take the chuck off its backing plate and make sure the backing
      plate is true
      > on your machine. It's possible for the chuck to run true on its
      backing plate,
      > and the plate to run true on a different lathe, while the plate and
      chuck mount
      > all wiggly on yours. The only way to be sure is to verify that the
      backing plate
      > runs true, and if not, to true it.
      > 3) If the first two tests pass, then you may be able to regrind the
      jaws to hold
      > true. You need to do this with the jaws loaded.
      > <SNIP>
      > Best of luck,
      > --William
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