Brass nuts on boiler stays?

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Brass nuts on boiler stays?

Home Forums Beginners questions Brass nuts on boiler stays?

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  • #48260
    Tony Martyr
    Participant
      @tonymartyr14488
      I am beginning to make boiler stays from 3/16 drawn bronze bar; the nearest job to a batch production task on the whole engine project. I don’t relish the job of having to make the equivalent number of bronze nuts. even if I had the bronze hex bar, particularly as I have lots of 4BA brass nuts in stock.
      The question is – since these nuts and the stay ends will be silver soldered does it matter that they are made of brass and not bronze?
      Tony
       
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      #4951
      Tony Martyr
      Participant
        @tonymartyr14488
        #48270
        John Baguley
        Participant
          @johnbaguley78655
          Hi Tony,
           
          You don’t really need the nuts at all if both ends of the stays are going to be silver soldered. You only need them if they are to be caulked with soft solder (Comsol etc.). Nowadays, most people just use plain copper rivets for stays with the heads inside the firebox if they are all silver soldered.
           
          John

          Edited By John Baguley on 05/02/2010 15:01:05

          #48277
          Tony Martyr
          Participant
            @tonymartyr14488
            Hi John
            I looked at using long 1/8″ copper rivets but decided to go down the traditional route described in various books. I also found drawn bronze stays are not only stronger but machine beautifully.
            The only mistake I have (nearly) made is to forget that the external stay heads have to be thin for the bottom two rows otherwise there is insufficient clearance between the frames.
            I think will use brass nuts on the inside of the firebox and make sure the stay end is well silver soldered – not a task I am looking forward to but with a cyclone burner and a heat shield across the tube face I hope all will be possible.
            Meanwhile 5 stays at a session ensures I don’t get tired and do something silly – like breaking a tap.
            Tony
            #48278
            John Baguley
            Participant
              @johnbaguley78655
              Hi Tony,
               
              At least the threaded stays won’t fall out or move at the worst possible time
              Brass will be fine for the nuts. It’s been used since LBSC days for stay nuts. I still use them for the boilers I build with caulked stays (shock, horror )
              John
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