Casting Phosphor Bronze

  1. Anyone cast with Phosphor Bronze?

    I need a 25mm long piece of 50mm diameter bronze bar to machine a gear for the cold saw I have.
    I can buy a billet of the right size for £20 but I happen to have a length of hollow core PB sat in my junk pile that I could melt and cast into a disc of the correct size.
    I have some crucibles but my forge is out of action so the plan is to dig a hole in the garden, fill it with charcoal, add an air supply and melt the PB.
    For a mould I was just going to use a piece of steel pipe with the end blanked off, PB melts at 930°C so the pipe should get hot but not melt - will the bronze fuse to the mould?
     
  2. pondy

    pondy Member

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    chedburgh, suffolk. uk
  3. outofthefire

    outofthefire Member

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    Leeds
    Personally for £20 i'd buy the stuff if its for a gear.
     
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  4. outofthefire

    outofthefire Member

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    1,631
    Leeds
    Bare in mind i'm a yorkshireman with short arms and deep pockets and i'd buy rather than recycle in this instance :laughing:
     
  5. doubleboost

    doubleboost Forum Supporter

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    North Easr England
    I usually cast aluminium bronze as it is very clean & stable
    It would be possible to melt the hollow bar and re cast it
    But as has been said i would just buy a bit
     
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  6. brightspark

    brightspark Member

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    not worth messing about for 20 quid
     
  7. gordon stephenson

    gordon stephenson Forum Supporter

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    Location:
    Skelton in Cleveland U.K.
    Is not the hollow bar of sufficient size to shrink a centre into it and cut the gear on the O/D.
     
  8. No, unfortunately what I have is 500mm of 1" OD with a 5/8" ID, it's been sat on the shelf for about 25 years!
     
  9. the snooper

    the snooper getting older by the day

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    pffft call yourself a yorkshireman, part timer :laughing:
     
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  10. pdg

    pdg Member

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    Wiltshire
    I'm a southerner and I'd have a shot at casting it ;)

    If it doesn't go to plan, you've lost a bit of time and a piece of stock that's been taking up space for a quarter of a century.

    If it works, that's £20 you can fritter away on fast women, cheap cars and loose booze :laughing:
     
  11. brightspark

    brightspark Member

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    and where abouts is that . sounds like heaven . I want some of that :laughing:
     
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  12. awemawson Member

    Tell you what - I'll give you £20 for your cored bar and you'll be good to go and get your blank :clapping:

    :sheep::sheep::sheep:
     
  13. Ton-up

    Ton-up Member

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    723
    Location:
    Essex, England.
    Wouldn't it be a hell of a lot weaker than bar material? May be alright for a bush or bearing, but not gear teeth.
     
  14. brightspark

    brightspark Member

    Messages:
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    Location:
    yarm teeside
    only if the grade of bronze used wasn't suitable
     
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