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Machinable Non Compressable Insulator And Other Materials Choices

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  • Machinable Non Compressable Insulator And Other Materials Choices

    I've decided I need to make some electrical tool height setters for my machines with a fairly small foot print.* I've figure out my design so they will have a lot of over travel and good repeatability, but I am wondering about the anvil or touch surface.* The analog indicator type I am using now seem to have a steel surface, but they are softer than the tools and they will ding fairly easily if you make a mistake.* Because I do a lot of flood machining I was thinking stainless might be the ticket.* 304 for the body, and 303 or 416L for the anvil with an acetal insulator.* A harder machinable insulator might be better, but I am not sure what.

    Definitely NOT something like HDPE since its compressible, and spring pressure over time might cause it to extrude and drift. I don't really have room for an off material setter to to be used all the time.* Adding soft buttons and macros to semi automate the tool height set is pretty easy for my controls.* It would improve my machine times, and reduce my necessity to deburr between tool changes more easily creating consistent parts.
    *** I always wanted a welding stinger that looked like the north end of a south bound chicken. Often my welds look like somebody pointed the wrong end of a chicken at the joint and squeezed until something came out. Might as well look the part.

  • #2
    Have you considered machinable ceramics such as macor?

    Sent from my Nexus 6 using Tapatalk

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    • #3
      That's an option and it may work. I notice they list its thermal properties.

      I guess I should have specified electrical insulator. I see it is an electrical insulator too. I wonder how it will hold up to the anvil coming back up against it repeatedly.
      Last edited by Bob La Londe; 11-16-2017, 04:25 PM.
      *** I always wanted a welding stinger that looked like the north end of a south bound chicken. Often my welds look like somebody pointed the wrong end of a chicken at the joint and squeezed until something came out. Might as well look the part.

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      • #4
        round carbide insert glued to sheet of aluminium oxide?
        Wont get much harder than that.
        Location: Helsinki, Finland, Europe

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        • #5
          Check out the different kinds of Garolite at www.mcmaster.com.
          Kansas City area

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          • #6
            If you can get your hand on some ceramic circuit board substrate, it's extremely flat, hard and insulating. Compressive stress is at 2600MPa, I recall as I spent half of yesterday browsing ceramic substrate datasheets.....
            If you bond a hard metal to it you should be golden.

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            • #7
              Originally posted by ikdor View Post
              If you can get your hand on some ceramic circuit board substrate, it's extremely flat, hard and insulating. Compressive stress is at 2600MPa, I recall as I spent half of yesterday browsing ceramic substrate datasheets.....
              If you bond a hard metal to it you should be golden.
              Easy peasy: https://www.ebay.com/itm/10pcs-TO-24...EAAOSw3ydV2IXy

              Machinable... well diamond grinding..
              Location: Helsinki, Finland, Europe

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              • #8
                G10 maybe? Fiberglass composite, extremely durable, easy to machine though it it a little hard on tooling. Cuts well but its pretty abrasive

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