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  1. #1
    Join Date
    Jun 2007
    Location
    Toowoomba, Qld
    Age
    31
    Posts
    0

    Default Need to borrow some taps and dies

    Does anyone have some 3/8" UNF Left & Right hand taps and dies I can borrow?

    If not UNF then any other fine thread. If not 3/8" then similar size.

    It's for an entry in the AWRs toolmaking competition

    Cheers,
    Andrew

  2. #2
    Join Date
    Jun 2007
    Location
    sydney ( st marys )
    Age
    64
    Posts
    4,887

    Default

    Why dont you just give yourself the practice and cut them on your new lathe.

  3. #3
    Join Date
    Jun 2007
    Location
    Toowoomba, Qld
    Age
    31
    Posts
    0

    Default

    I can't cut left hand threads on my lathe

  4. #4
    Join Date
    Feb 2009
    Location
    Kyabram, Victoria, Australia
    Age
    46
    Posts
    96

    Default

    Quote Originally Posted by funkychicken View Post
    I can't cut left hand threads on my lathe
    cut a right one and turn it around

  5. #5
    Join Date
    Jun 2007
    Location
    Toowoomba, Qld
    Age
    31
    Posts
    0

    Default

    Quote Originally Posted by Matty5700 View Post
    cut a right one and turn it around
    Somehow I doubt that'd work

  6. #6
    Join Date
    Nov 2008
    Location
    Canberra
    Posts
    184

    Default

    I bet you can cut left hand threads on your lathe. Put one extra idler gear (it doesn't matter how many teeth it has, it won't change the pitch) on the gear train and left hand she will cut. This is how it was done on many old fashioned lathes made for the amature. You can make an internal screwcutting tool out of silver steel and possibly not need a tap or a die

    A small tip about taps if you end up buying any. The toolshop usually sells them made of HSS with the threads ground. These are expensive. It is also possible to get good carbon steel taps which are much much cheaper and don't have ground threads. Carbon steel taps are at least as hard as HSS, but can't stand as much heat. Why you need hand taps to take heat I'm not sure. If your tool shop doesn't have carbon steel taps they can probably order them in for you. Personally I never buy HSS taps.

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