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Emma Victoria pump

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Emma Victoria pump

Home › Forums › Model Engineer. › Emma Victoria pump

Viewing 5 posts - 1 through 5 (of 5 total)
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  • 30 November 2013 at 12:48 #136722
    Bill Dawes
    Participant
      @billdawes

      Hi all, just making the pump for Emma. This is a fabricated version and the author Henry says clamp components together for silver soldering.

      What I am pondering on with this is how do you clamp parts together, obviously you need to in someway, and still have the joint clearances required for the solder to flow.

      I have tried in the past, wiring things together but this has never been ideal as it is ok to hold the bits together but not very good at preventing lateral movement. (At least the way I did it, possibly my lack of expertise)

      I assume if clamps are used they would need to be minimal size to reduce the heat sink effect.

      Bill D.

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      30 November 2013 at 12:48 #37618
      Bill Dawes
      Participant
        @billdawes
        30 November 2013 at 16:25 #136727
        JasonB
        Moderator
          @jasonb

          If its two flat surfaces or even mating curved surfaces put a couple of punch marks in one which will raise a slight burr around the mark and hold the surfaces apart just enough for the solder.

          I keep a couple of toolmakers clamps just for soldering as they get a bit rusty after heating a few times.

          Don't overdo the clamp pressure as you can find that when heated the parts will bend especially if they are brass or bronze, just enough to keep them in place

          Edited By JasonB on 30/11/2013 16:26:03

          30 November 2013 at 21:50 #136757
          Bill Dawes
          Participant
            @billdawes

            Yes, read about that before somewhere, should have remembered that one.

            Thanks Jason.

            Bill D.

            1 December 2013 at 15:10 #136815
            john kennedy 1
            Participant
              @johnkennedy1

              Its ok to clamp it if its left undrilled. If you drill it first it will go oval..guess how I know.

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