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  1. #11
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    Re: Next project... Stacking them up

    AMAZING! This is just great. Keep us posted.
    pithy likes this.

  2. #12
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    Re: Next project... Stacking them up

    I've been practising polishing for the past couple of days.
    Turns out that Bronze is a sod to polish nicely, because is quite 'soft' it smears.
    Tiny pieces are even worse, because there is no nice way to hold them.

    THe minute hand looks nice and shiny to the naked eye




    But it looks rough as a ploughed field under a 40x microscope:




    For the moment the minute hand is good enough, even it its not perfect.
    The facets are nice and crisp, and overall its shiny.
    Ill get some more practice with the hour hand.
    I think the case will be easier - its big enough to hold onto after all.

    Dave
    1afc likes this.
    Learning Patience one dropped part at a time.

  3. #13
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    Re: Next project... Stacking them up

    Bit of an update. I've been doing a little bit on the Porsche engine, a little on this.

    I polished the hour hand as well, then it was time to make some inroads on the case.
    Spring bar holes, drilled lugs as I like the simplicity for changing straps.



    Then drill a hole for the stem to go through.



    And make the case back snap on. I've still got to bevel the edge of the back.





    Before making the crown and cutting the stem to the correct length I made delrin movement spacer, to hold the movement in position.



    Then it was time to make a start on the crown. Bronze of course :)
    I took this photo because the swarf is tiny, but looks just like 'real' swarf.
    The drill is 0.5mm for scale.



    Thats about the right size, this is a hand winder after all:



    Then a rough clean up with some files on the case. You can start to see the beautiful curve / facet thing coming out.



    After finishing the crown, tapping it and fitting to the case I remembered that the case side is actually bevelled... So a crown recess is in order.
    Bosh the case in the mill, and make one :)



    My vision for this case is a nice combo of curves and King Seiko Hi Beatesk flats.
    To make the facets as flat and reglar as Seiko manage will be a feat, but I'm going to try :)

    First I need a jig to use. After a dose of thinking about I put a hunk of brass in the big lathe and turned a plug thats a nice tight fit in the inside of the case.



    I initially planned to use a large Ball bearing to run the files and stones on to give me the angle of the facet.




    However this was far too wobbly, and required a great deal of concentration to keep the facet flat and not bowed.



    Its not very obvious in the photo, it is only slight,
    Even a slight bow is really a fail in this, so I hacked up JigMk2 (tm).
    I really should make a proper one, and maybe I will once I can get to the welder and the surface grinder (which would of course make making flat flats a piece of cake...)



    There now follows a long period of carefully rubbing up and down and the facets appear:





    There is still a way to go, but its getting there, a bit like the Porsche engine...



    More frequent (mostly live) updates occur on Twitter @solutionsbydave

    Dave
    timetrial-pro likes this.
    Learning Patience one dropped part at a time.

  4. #14
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    Re: Next project... Stacking them up

    Top work mate!

  5. #15
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    Sep 2012
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    Re: Next project... Stacking them up

    Final build log for this. Yes, that means a finished watch :)



    I got to assembling the dial and hands and discovered that the holes were slightly too small.
    so out with the tiny reamers and do some careful reaming.
    Then fit the hands.
    They are a nice tight fit now.



    I bought some GS hypo to finally fit the crystal, which is a click fit, but with no gasket I always planned to glue it in.



    The Titanuim 12 marker has oxidised to a lovely dark grey, which is still super polished. It blends into the Carbon dial, but also catches the light.
    The case is now starting to patinate to a lovely honey bronze colour.
    The facets on the case do a super job of tricking the eye about how big it is. Hard to catch that in a photo.

    Its not perfect, there are a few casting and execution flaws, but overall Im very happy, and it will go nicely with the swanky bronze cuff links I made at a posh do later this year.




    Heres the original plastic prototype and the finished brone one.




    It only took a year to turn one into the other...

    Comments welcome.

    Dave
    Learning Patience one dropped part at a time.

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