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Thread: Yellow cast brass for restoring movements

  1. #1
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    Default Yellow cast brass for restoring movements

    I am looking for a supplier who can supply me with some cast yellow brass. I need the same color brass as is the color of the 18th century movement. Otherwise I will have to melt brass myselve, I have sufficient old scrap 18th cent. movements (parts). Has any of the forummembers had any succes in melting brass?

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    Default Re: Yellow cast brass for restoring movements

    try looking up "time restored" a UK company, they sell sections in different sizes , yellow brass.
    David

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    Default Re: Yellow cast brass for restoring movements

    Thanks Dave, I will take a look there.

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    Default Re: Yellow cast brass for restoring movements

    Their email is www.timerestored.co.uk

    JTD

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    Default Re: Yellow cast brass for restoring movements

    Thanks again!

  6. #6

    Default Re: Yellow cast brass for restoring movements

    I've got brass from them before and it's a good colour match to the English clocks I have restored. Obviously it's soft so will need to be work hardened if you want to use it for wheels etc.

    Cheers

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    Default Re: Yellow cast brass for restoring movements

    Say one has a furnace capable of melting brass (I do) and can cast it in any shape desired (I can)...
    How would one go about casting and work-hardening this brass, presuming one doesn't have a 500-ton rolling mill available (I don't).
    Just cast a cylindrical slug and start wailing on it with a hammer and anvil to flatten it?
    If one were going to make wheels, how much flattening should be done? Say... A one inch slug hammered out to 1/8 inch thickness?
    Start out with a half inch thick slug?
    A quarter inch slug?
    Living life at eight beats per minute.

  8. #8

    Default Re: Yellow cast brass for restoring movements

    basically you have it, though I doubt you need to start out 1" thick. Brass was hammered because rolling mills didn't exist and then when they did they weren't readily available.

    Some makers explored the improvement that could have in hardness and started using the technique for that reason, not just because it was part of the production process. I read about two of our locals being involved in that Delaunce and Debnam.
    Nick, lots to learn, late starter.

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    Default Re: Yellow cast brass for restoring movements

    Hi folks, back again with some news. I have taken a look at the prices for yellow cast brass and I have decided to go casting myselve I just ordered a 3kg Goldbrunn electric mini furnace. I have plenty of scrap (18th century) movementplates etc etc from English clocks. I was advised this was the right color brass I need for my job. It takes an investment, but at the end I think it will be cheaper then buying in ready cast brass. And more-over I am looking forward in casting my own brass I also ordered 5 kilogram forming sand so all I need now is to make models in wood and use them with te sand as models. Will keep you informed. MartinM, I am curious in your experiences with casting.

  10. #10

    Default Re: Yellow cast brass for restoring movements

    This sounds good, there is always a demand for small batch casting for clock restoration.
    Nick, lots to learn, late starter.

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    Default Re: Yellow cast brass for restoring movements

    Did someone already place an order

  12. #12

    Default Re: Yellow cast brass for restoring movements

    need a set of spandrels for Mr Knibb
    Nick, lots to learn, late starter.

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    Default Re: Yellow cast brass for restoring movements

    Quote Originally Posted by novicetimekeeper View Post
    need a set of spandrels for Mr Knibb
    What kind of spandrels and size. I have a small collection originals, perhaps..........

  14. #14

    Default Re: Yellow cast brass for restoring movements

    single cherub. not the London style ones. I think I have a pic



    Bottom right in pic, that's off another 30 hour, bit small I think.
    Nick, lots to learn, late starter.

  15. #15
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    Default Re: Yellow cast brass for restoring movements

    If you've ever done it in metal shop, etc. it's about the same. I use the basic cope and drag method. The one time I tried a cask, it fell apart because I didn't pack it tightly enough and the part was probably a bit too big for the frame . If someone were to do some CNC molds in graphite, they'd probably make a lot of money.
    It's a higher temp and you really need to use an oil-based (Petrobond, etc.) sand, instead of water. And clean flux (I use borax).
    Because of the zinc, make sure you're well upwind of the fumes. The furnace may say it can be used, indoors, but unless you've got industrial air handling (especially on the first burn-in) the environment will be toxic.
    Make sure to do a test pour or two before trying to commit to a real part as the technique isn't very ergonomic and it's easy to spill/splatter in ways you weren't expecting.
    The Hardin type crucibles and tongs are, by far, the easiest to use.
    Living life at eight beats per minute.

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