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  1. #21
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    Haz?

    Scrap yard quoted me $100/tonne.


    I have a really long conveyor and a prox 200 gal sump.



    ----------------------

    Think Snow Eh!
    Ox

  2. #22
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    You mentioned cast iron, and it's only a matter of time before spreadsheet guy chimes in.

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  4. #23
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    Well, maybe his spreadsheets will have some enlightening info?


    -------------

    Think Snow Eh!
    Ox

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  6. #24
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    Quote Originally Posted by Ox View Post
    Well, maybe his spreadsheets will have some enlightening info?


    -------------

    Think Snow Eh!
    Ox
    There's a first time for everything, so you could be right!

  7. #25
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    I only machined cast iron a couple times, and I hope to never again, what a mess. The swarf reminded me of that fine sand they used to put in commercial ashtrays when smoking was allowed everywhere.

  8. #26
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    Quote Originally Posted by Ox View Post
    Haz?
    Ja, at least my friends that run grind shops cannot just dispose of the swarf like chips. It's considered hazardous for some reason.

    I have a really long conveyor and a prox 200 gal sump.
    Both would be drawbacks in handling grinding swarf imo. Small collecting tank in the machine with a straight shot for the coolant, better sealing and design against coolant, big external tank with a filter across the top and settling stages would be what you'd like nowadays. Machining centers would not handle grinding swarf well, I don't think ...

    You'll doubtless survive whichever way you decide to go, I'd just rather clean up a dry mess once than deal with the sludge throughout the coolant system, but .... to each his own, right ?

  9. #27
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    I prolly could doo that, but would need to jack the machine up a foot.
    (32,000 #)

    It prolly is at least worth considering...



    Trust me - I am quite aware of it getting into and resolidifying.
    Thus why I said that I shy away from it unless either way low or way high volumes.


    ------------------

    Think Snow Eh!
    Ox

  10. #28
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    We've been running ductile iron day in and out for 8 years now. We have yet to destroy a machine as a result of it.

    Cast iron is messy and requires more cleaning. 90% of preventative maintenance is cleaning anyway.

    Cast iron chips are a lot more brittle than steel, so they don't jam up and scratch way cover scrapers like steel. So that's the plus side.

    Worried? Run it like steel, and be prepared to spend a couple hours when you're all done draining the coolant, cleaning out the sump with a drywall scraper, and pumping the coolant back in through a filter sock. It's not nearly as bad as it sounds.

    Long term, cast iron dust builds up on your servo drive heat sinks and motor fans. It cleans off, but is a pain. Again, worse than it sounds. Just be aware that you gotta do it.

  11. #29
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    dscf0242.jpg

    We do these in batches of 50 or 100. Flood coolant. Messy, yes. The 3 hours of clean up is figured into the job. 16 inch chuck for reference. Money maker.
    Attached Thumbnails Attached Thumbnails dscf0243.jpg   dscf0245.jpg   dscf0244.jpg  


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