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new drawbar for my 8250 clausing mill

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  • new drawbar for my 8250 clausing mill

    Now that I've learned how to remove my ER collet holder (small brass hammer, very quick strikes), I've got to make a new drawbar to fix the one I bent (large brass hammer, very heavy strokes).

    It's 3/8X16. not hard to make, and I have, but it was out of 1018 steel. I didn't case harden it.

    the question, what should these be made from? should they be case hardened?


  • #2
    The cheapo draw bars you buy for $15 are not hard at all so its easy to pull the threads. We found welding a grade 8 bolt on the end will make a long lasting draw bar.

    So the threads are the only part you would like to case harden, but you can get away with not doing anything.


    • #3
      If you want something a little more durable, something like 1144 might be a good choice.

      You might see if you can find a setup stud that's long enough to adapt. I've seen 1144 and 4140 listed in various catalogs as the material those are made of.
      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


      • #4
        I've got a Dorian R8 drawbar, and it's made from hardened 4140. The hex drive piece and the R8 threaded section are bomb-proof.
        "Twenty years from now you will be more disappointed by the things that you didn't do than by the ones you did."


        • #5
          I just buy cheap old threaded rod for draw bars and put a couple nuts on top.
          There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. -Ernest Hemingway
          The man who makes no mistakes does not usually make anything.-- Edward John Phelps


          • #6
            The used Burke I had, came with a drawbar made out of a piece of B-7 hardened all thread with a coupling nut pinned to the end of it, I used it that way for 5-6 yrs, then sold the mill with the same drawbar, never had a problem with it.