1 1/2 internal npt thread


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Thread: 1 1/2 internal npt thread

  1. #1
    Pridefull's Avatar
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    Default 1 1/2 internal npt thread

    Greetings

    Could someone please explain how to calculate values for npt thread and for preparation hole.

    I need to make 1 1/2 internal npt thread lenght of the thread would be 32 mm and i would like to start 5mm in front of the part.

    I am using a fanuc controler with 2 line g76 code

    Thanks in advance



  2. #2
    Registered metlshpr's Avatar
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    Default Re: 1 1/2 internal npt thread

    1 1/2 internal npt thread-taper-pipe-thread-program-procedure-jpg

    WANNA GO FASTER


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    Default Re: 1 1/2 internal npt thread

    In the second block of G76, R = L/32 where L is the total axial movement of the tool. Negative for external and positive for internal, in right-to-left machining.



  4. #4
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    Default

    Thanks

    for lenghts i figured it out I'm having dificulties calculating major and minor diameter since there is so much limited information on the internet



  5. #5
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    Default Re: 1 1/2 internal npt thread

    All info can be found in the machinist handbook for the major and minor sizes. The above attachment information was gathered from there.

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1 1/2 internal npt thread

1 1/2 internal npt thread