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  1. Replies
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    HSS is brittle. Not exactly breaking news.(pun...

    HSS is brittle. Not exactly breaking news.(pun intented)
    Soft or un-twisting HSS drills are obviously faulty but this one has behaved pretty much expected. OK, possibly failed at lot lower stress...
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    thickness gauge sort of? Quick-Mini Series 700...

    thickness gauge sort of?

    Quick-Mini Series 700
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    0.012" ? Ha, that qualifies as a bar stock :D ...

    0.012" ?
    Ha, that qualifies as a bar stock :D

    This was about 14 micrometers or 0.00055 inches in diameter:
    https://i.imgur.com/uHDSiUN.jpg

    Any smaller than that and you need damn electron...
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    Pull out your wallet and start asking around from...

    Pull out your wallet and start asking around from EDM services.
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    Grobet USA Swiss Pattern Precision 6” Half-Round...

    Grobet USA Swiss Pattern Precision 6” Half-Round File, Cut 6
    https://www.amazon.com/Grobet-32-510J-File-Set-stanleysupply/dp/B0184Y5KI0

    edit: Italy is another manufacturing site for Grobet USA
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    some of the "Grobet USA" products are actually...

    some of the "Grobet USA" products are actually made in China. Grobet USA is just trickster name to milk 'Muricans.
  7. Another vote for moisture.

    Another vote for moisture.
  8. Replies
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    C37 as Rockwell hardness C37? That would be...

    C37 as Rockwell hardness C37? That would be something like grade 8 bolt.

    100% agree with others, what OP is having is usually called tearing.
    Two ways around it: LOT more speed, heavier infeed or...
  9. And there is some other weirdos also in cars....

    And there is some other weirdos also in cars. Like seatbelt mounting bolts that are inch sized even in all the German cars. (Bolt size actually matches some weird metric size too..)
  10. Replies
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    There has to be more than a few tooling suppliers...

    There has to be more than a few tooling suppliers in Edmonton.
    SOWA 123-308 Yellow Ring HSSE-V3 Spiral Point Tap - 1/4 inch at Edmonton Fasteners and Tools Ltd.
    Thomas Skinner Company Profile
  11. Given how close they are in carbon content I'm...

    Given how close they are in carbon content I'm quite surprised that you were able to sort them out on spark test.
    Or is it the chromium that makes difference?
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    55 Rc sounds unrealistic for 316 so I'd vote for...

    55 Rc sounds unrealistic for 316 so I'd vote for "you got something else" . 420 maybe?

    Even still I'd follow the previous advice and toss the "regular hand taps" and get proper taps specially for...
  13. Maybe better yet: Make functional part but with...

    Maybe better yet: Make functional part but with some really cumbersome features and machine it in the worst possible order. :D
    Everything rounded, radiused and machined from angles that are only...
  14. Looks like "shop wipes" on background and the...

    Looks like "shop wipes" on background and the parts are more likely 0.4" than 4 feet.
  15. ”Sunny day outdoor lightning” is not easily...

    ”Sunny day outdoor lightning” is not easily attainable in indoors.

    We just installed 4x70w led tubes to part of friends shop, lightning level was about 1500 lux (similar to small electronics...
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    It was mentioned somewhere that the crane alone...

    It was mentioned somewhere that the crane alone has 10x800kW drives. Sounds like lot to me but so does 5000 tons too. Some back of the envelope engineering might reveal if the drive power is enough...
  17. umm, 9/64" would be double size. 9/128" would...

    umm, 9/64" would be double size.
    9/128" would be close but never heard of such a thing.

    Tiny hex heads have sometimes quite large oversize tolerance. And low cost hex keys can be quite a bit...
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    Exactly. No need to "ask the vendor" if 1/4"...

    Exactly.
    No need to "ask the vendor" if 1/4" nylon bolts can be torqued to 35Nm!
    That works same way as Nasa Mars orbiter :D (possibly for similar reasons too..)

    Good 1/4" UNF grade 8 bolt with...
  19. I'm actually thinking more or less along the same...

    I'm actually thinking more or less along the same lines. But politics are also along same lines in here. Attempt is not to get rid of the virus, just keep the infection rate below ICU capabilities....
  20. XRF would give you most of the other components...

    XRF would give you most of the other components but not carbon. Sort of sanity check and really often used as incoming inspection as it sorts out 304 from 316 etc. 10k gets you a basic entry-level...
  21. Test numbers in here are actually lower per...

    Test numbers in here are actually lower per capita but ratio of tests to infected is lot better. Infection was already more widespread in US before they got finally to
    Action.

    At the moment we...
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    Crane tower seem to be about third of the ships...

    Crane tower seem to be about third of the ships breadth(49m) and hook shank is 3/65 of tower diameter.
    Shank is about 750mm diameter in that case.
    440 000 sqmm2, SWL 5000Mton = stress 111N/mm2...
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    Ropeblock if this is correct: Imgur: The magic...

    Ropeblock if this is correct:
    Imgur: The magic of the Internet
    Liebherr Orion crane failure under 5500t load test - Engineering Failures & Disasters - Eng-Tips

    https://i.imgur.com/nLOkG4y.jpg
  24. Replies
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    Liebherr: Orion's Crane Hook Broke at 2,600...

    Liebherr: Orion's Crane Hook Broke at 2,600 Tonnes; Hook Externally Supplied | Offshore Wind

    Shame on Liebherr if they used cheapest india/china forging...
    Or maybe the hook was supplied via the...
  25. Looks like they figured out the hand desinfect...

    Looks like they figured out the hand desinfect supply chain:
    https://i.imgur.com/D3ExSbZl.jpg

    Bottles, cans, bags, canisters and rattle paint spray cans. looks like every production line is...
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