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K&T cat 40 tool holders

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  • K&T cat 40 tool holders

    My friend bought a K&T horizontal boring mill that supposedly has a Cat-40 spindle but cannot find tool holders that fit. He has bought several holders, but none of them will tighten up on a tool. I have not looked at it yet so wondering if anyone here knows if K&T has some secret means of getting the tool holder to hang onto a tool, or did he get some wrong info, and maybe the spindle is 50 taper? He also said there is a compression spring in the bottom of the socket, and no draw bar. I can't go there today, so fishing for ideas on what to look for. It's been years since I last ran anything that K&T made.
    “I know lots of people who are educated far beyond their intelligence”

    Lewis Grizzard

  • #2
    If there is no drawbar that explains why they won't tighten up . A 50 taper looks massive compared to 40, will swallow it. A BT 40 is the same taper as the Cat but with metric thread.

    I think we need some measurements
    in Toronto Ontario - where are you?

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    • #3
      Originally posted by Dave C View Post
      My friend bought a K&T horizontal boring mill that supposedly has a Cat-40 spindle but cannot find tool holders that fit. He has bought several holders, but none of them will tighten up on a tool. I have not looked at it yet so wondering if anyone here knows if K&T has some secret means of getting the tool holder to hang onto a tool, or did he get some wrong info, and maybe the spindle is 50 taper? He also said there is a compression spring in the bottom of the socket, and no draw bar. I can't go there today, so fishing for ideas on what to look for. It's been years since I last ran anything that K&T made.
      Your post is a bit confusing. It makes it sound like your friend expects a CAT40 tool holder to "squeeze" a tool like an R8 collet.

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      • #4
        There is no provision for a draw bar. The socket is a blind hole with a compression spring in the bottom. The more I thought about it, it would make sense that the spindle is equipped with a quick change socket, which may require compatible tool holders. I need to do some research.
        “I know lots of people who are educated far beyond their intelligence”

        Lewis Grizzard

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        • #5
          Sounds like you need ”pull stud”

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          • #6
            Originally posted by tomato coupe View Post
            Your post is a bit confusing. It makes it sound like your friend expects a CAT40 tool holder to "squeeze" a tool like an R8 collet.
            Sorry for the confusion. I dashed off this post shortly after my friend called asking for help. He is not familiar with CAT 40 tooling, and his discription was not really clear. I should have waited until seeing the machine in person before posting the question.
            “I know lots of people who are educated far beyond their intelligence”

            Lewis Grizzard

            Comment


            • #7
              Originally posted by Dave C View Post
              There is no provision for a draw bar. The socket is a blind hole with a compression spring in the bottom. The more I thought about it, it would make sense that the spindle is equipped with a quick change socket, which may require compatible tool holders. I need to do some research.
              The modern standard quick change is via a pull stud installed in the drawbar threaded hole, but there are also an external quick change systems - i.e. Erickson quick change system. Perhaps its something like that
              Last edited by Mcgyver; 03-11-2019, 03:10 PM.
              in Toronto Ontario - where are you?

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