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Thread: Higbee thread

  1. #1
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    Default Higbee thread

    Hi there, I am from NZ and am not familiar with NH Higbee threads. I believe it is an American pipe thread used in the fire service? Can someone give me some code example for machining a 2.1/2" 7.5 TPI NH HIGBEE thread on an Okuma. I,m not sure if it is a Taper thread. Thanks in advance.

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    Hi, thanks for the reply. It was very helpful. Is this particular thread a taper thread? Thanks.

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    Quote Originally Posted by Dadger47 View Post
    Hi, thanks for the reply. It was very helpful. Is this particular thread a taper thread? Thanks.
    NH threads are straight, no taper. PM me your email address, and I'll send you the relevant pages from Machinery's Handbook.

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    If you search PM, there are several postings regarding how to program a higbee cut on a 2 axis lathe.

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    Default

    Higbee is a term used for a type or style of removing the first incomplete thread. It isn't a Thread specification as such.

    R


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