1. Greenfield Tap and Die (GTD) 1/2" Self Opening Die Head

    Not to be confused (as I did in earlier post) to the Geometric Die Heads.  After much digging around I have found tons of Geometric Die Heads, a few odd brands but nothing like the GTD one pictured below.

    This GTD version seems to be adjustable over a particular range of diameters.  The markings on the chasers (the only ones with it) say 18 18.  Typical Type D chasers are specific to diameter and tpi - say 5/16-18 for instance.  This GTD version is marked 1/2" so basically the 18 18 chasers would be useful for 5/16-18 and not much else I am afraid.

    The D type chasers are available, yet to find the J Hook looking ones that are used in the GTD Model.

    Wp Image 1393249715 Wp Image 1671042768 Wp Image 949426688 Wp Image 229793107 Wp Image 2061126736 Wp Image 717175601

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  2. Trial Run on Geometric Die Head

    Took apart and cleaned up this odd ball Geometric Head....on the hunt for chasers now.  The chasers in it are odd.  They say 18 18.  From what a can gather the head is adjustable so it can do 18 tpi on a range of sizes...5/16 the only one useful?

    [video width="1920" height="1080" mp4="http://lincolnsmithy.com/wp-content/uploads/2017/06/VID_20170617_154803.mp4"][/video]

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