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  1. #1
    Join Date
    Jan 2006
    Location
    Blue Mountains NSW Australia
    Posts
    408

    Default Does anyone know the die size for tyre inflation valve?

    I have to cut a thread on some brass tube for connection of airbag suspension on my vehicle. I can find my gauges at the moment and was wondering if anyone new the size. None of my dies fit so I need the size so I can purchase the die.

    Thanks all

    Fossil

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

    Default

    i dont think you would be far out with 5/16 x 32unf

  3. #3
    Join Date
    Jan 2004
    Location
    Mackay North Qld
    Posts
    6,446

    Default which aprt of the tire valve

    Hi Fossil
    I think you are referring to the valve dustcap thread.

    if not the Wikipedia says this about SCRADER valves which are practically standard.:

    The Schrader Valve's Dimensions

    The standard Schrader valve has the following thread:

    External Thread

    * METRIC: 7.7 mm OD, thread root diameter is 6.9 mm x 0.794 mm pitch.
    * IMPERIAL: 0.305 in OD, thread root diameter 0.302 in x 32 tpi (threads per inch)

    Internal Thread (the valve core)

    * METRIC: 5.30 mm OD x 0.706 mm pitch
    * IMPERIAL: 0.209 in OD x 36 tpi.

    None of the above tally with pitch or diameter sizes in my Drills and taps booklet,I think it may be a special.

    If adapting to the external dust cap thread why not get a metal dust cap and silver solder a connection.

    Grahame

  4. #4
    Join Date
    Nov 2007
    Location
    Adelaide
    Age
    58
    Posts
    1

    Default

    Hi Fossil,

    Very late in on this one, sorry.

    if you want to cut a thread on the outside of the tube, some of the better quality valve tools have a die in the bottom for re-threading damaged tyre valve stems. google: "schrader valve tool 4-way"

    Without knowing what you want to achieve, I'd suggest another alternative may be to visit a tyre place that does truck tyres. you may be able to find a suitable already threaded tube or bolt-in valve stem that you can work with (for example - valves on bus & truck wheels). You might see something you like in the catalogues here: http://www.rlmdistributing.com.au/products.html
    Look under: Tyre Valves & Tyre-Related Accessory Products
    » haltec catalogue
    » wonder products

    good luck in your quest
    david

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