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Makeing an adjustable backplate

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  • Makeing an adjustable backplate

    I'm making the backplate for a Bison 5C chuck. I was going to just cut the aligning hubs as close to perfect as I could (my spindle is bolt-on with a alignment ring). Then I saw on a site where a guy made a plate for a 3-jaw but cut the ring something like 0.010" over size and added 4 adjusting screws radially to take out the tir once everything was mounted in working conditions.

    Since the collet chuck isn't adjustable like an indie 4-jaw this really appeals to me. I figure 4-set screws with transverse locking screws retaining the set-screws via brass plugs should be ideal.

    What I'm wondering about is the end treatment of the aligning screws where they bear against the spindle ring. Should there be some sort of shim between the screw and hub to take wear or spread the force out. Brass, spring steel or something like that, a few thou's thick?
    Any ideas? and does anyone have a picture of how Bison did this on the more expensive adjustable chuck?

    Thanks as always.

  • #2
    Opps!


    [This message has been edited by SGW (edited 10-14-2002).]
    ----------
    Try to make a living, not a killing. -- Utah Phillips
    Don't believe everything you know. -- Bumper sticker
    Everybody is ignorant, only on different subjects. -- Will Rogers
    There are lots of people who mistake their imagination for their memory. - Josh Billings
    Law of Logical Argument - Anything is possible if you don't know what you are talking about.
    Don't own anything you have to feed or paint. - Hood River Blackie

    Comment


    • #3
      Drill the ends of the screws and Loctite in some brass pads?
      ----------
      Try to make a living, not a killing. -- Utah Phillips
      Don't believe everything you know. -- Bumper sticker
      Everybody is ignorant, only on different subjects. -- Will Rogers
      There are lots of people who mistake their imagination for their memory. - Josh Billings
      Law of Logical Argument - Anything is possible if you don't know what you are talking about.
      Don't own anything you have to feed or paint. - Hood River Blackie

      Comment

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