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Help me put this to use please-P&W "centering" indicator

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  • Help me put this to use please-P&W "centering" indicator

    I purchased an old Pratt & Whitney tool. It has a MT-4 taper, a small T-Slot adjustable DI mount and I suspect is best suited for use in a lathe or mill.
    I am lead to understand it is a bore gauge tool but I am wondering if anyone can anyone offer some other uses for it mainly for my lathe which is an old Sheldon EXL-44-B with a MT-5 spindle taper which, of course, I can get a sleeve for to adapt it to MT-4.
    Thanks
    Howard
    4/DSC01422.JPG

  • #2
    No image! ???

    Ken

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    • #3
      What you're describing is a P&W "Work Locating Indicator" which was designed for use on a jig bore to precisely locate work relative to an existing hole. It would be useful on a milling machine too but I'm having a difficult time seeing a productive use for it on a lathe. I'm curious did you get anything else with it other than an indicator? It originally came as a set with a proving bar in a mahogany case.

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      • #4
        I hope the image is back?
        I have a horizontal mill with a vert attachment and a vertical mill waiting (a long time) for restoration so I think I'll keep it for now.
        It appears as if the MT4 taper can be easily changed out to another shaft/taper type.
        I didn't get any box or proving bar. Is the proving bar a calibration tool?
        Thanks
        Howard



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        • #5
          The proving bar was placed in the jig bore spindle and also used to indicate a hole.

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