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  1. Replies
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    Sounds amazing (and graceful) to me :U

    Sounds amazing (and graceful) to me :U
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    Very impressive Vin. Looks like you need a PhD to...

    Very impressive Vin. Looks like you need a PhD to operate it!
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    That would be a case hardening process such as...

    That would be a case hardening process such as carburizing or nitriding. I have a very vague memory that nitriding is used on valve seats but could be wrong on that.
    As for cast iron cylinders I...
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    So it's one of the bronzes - the colour had me...

    So it's one of the bronzes - the colour had me wondering if it was pewter.

    As for the last bell for the carillon, it may not be tuned yet but it sure sounds good on my tablet speaker. :2tsup:
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    Very nice Vin. At first I thought the clapper...

    Very nice Vin. At first I thought the clapper would miss the bell, then realized that the sphere is the bit you hang on to. What metal did you use?
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    Looking good Vin. I have no experience with it...

    Looking good Vin.
    I have no experience with it but that looks like a large casting for the investment process.
    Have you posted anything on the patterns and making the wax models? I'm interested in...
  7. Thread: 30th bell

    by labr@
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    I had to look up the meaning of carillon and am...

    I had to look up the meaning of carillon and am surprised I hadn't come across it before.
    How do you tune the bells? Is the tone mostly decided by size?
  8. Thread: 30th bell

    by labr@
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    Looks good Vin. Where do your bells end up? I can...

    Looks good Vin. Where do your bells end up? I can picture them on river boats but the market there is probably somewhat limited these days.
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    It's possible that the new source of pewter is...

    It's possible that the new source of pewter is from Asia where they have a higher tin content at the expense of the antimony content - about 5% Sb in European pewter, about 1.5% in Asian.

    If you...
  10. I don't know the formula to calculate the ideal...

    I don't know the formula to calculate the ideal chill block size. However it looks like the cooling action needs to be fairly strong to be effective because most of the contraction in the boss needs...
  11. Well it's easier to understand why you are...

    Well it's easier to understand why you are thinking of using chill blocks now - there doesn't seem to be any easy way of applying risers to some of those areas.

    At the risk of causing more...
  12. Chill blocks might help but they might make...

    Chill blocks might help but they might make things worse. It's very dependant on the actual shapes involved. Posting some images of the pattern may help others with providing useful advice.

    Have...
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    Clay casting is similar to casting in sand moulds...

    Clay casting is similar to casting in sand moulds in the sense that there is a parting line. This would probably not allow you to mould all the features that you need, such as the claws that hold the...
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    For the original question I'd go with what Greg...

    For the original question I'd go with what Greg said.

    With regard to annealing, the casting will still be brittle compared to steel - grey cast iron is an inherently brittle material due to the...
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    Why can't you melt the metal in another...

    Why can't you melt the metal in another furnace/crucible and then pour it into the crucible on the machine?

    Can you post a pic of the machine? It may help to illustrate the limitations /...
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    A late reply I know but I've only just stumbled...

    A late reply I know but I've only just stumbled on to this forum.

    Texx is right, it would be ferrosilicon or a proprietary inoculant based on ferrosilicon.

    The late addition of a small quantity...
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