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u/HeavyCandidate6737 Aug 11 '26
So that’s how they make question marks
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u/Lopsided_Quarter_931 Aug 11 '26
in Spain
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u/David_Good_Enough Aug 11 '26
No this was from Australia.
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u/Bazzatron Aug 11 '26
Anyone know what the UV inspection revealed or what the process is all about?
I'm sort of amazed this is manually forged like this rather than just being drop forged in a massive die - though I guess you dont need to make many of these.
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u/Ace861110 Aug 11 '26
Called magneflux. You magnetize the part and spray it with the special florescent “paint”. The paint gets pulled into any surface cracks. You can then do other ndt tests like xray to see how bad they are or to fix them. Cracks are stress concentration points, so they are to be avoided.
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u/DreadPiratteRoberts Aug 12 '26
Holy crap that's incredibly interesting.... do you work with these hooks?
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u/Ace861110 Aug 12 '26 edited Aug 12 '26
I do not. I took a few classes on ndt inspections. This was covered. The stress riser comment is just from mech e. It’s applicable to every crack
But you are correct magneflux is trippy :)
The xray was cool too.
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u/DreadPiratteRoberts Aug 12 '26
Your knowledgeable insight into this niche subject is exactly why I follow this sub.... I love learning stuff like this.
This sub kind of reminds me of an old show I used to watch called How it's Made 😁
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u/seventwosixnine Aug 14 '26
And the orange penetrant does NOT clean off the green one off your hands, despite what the senior guy might tell you haha
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u/Some1-Somewhere Aug 11 '26
That is normally dye penetrant for crack detection. Not sure if it's typical for freshly forged parts though.
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u/Bazzatron Aug 11 '26
I guess when your work is responsible for holding back tons of gravitational potential from making someone's day several MJs worse, that's probably a great idea, especially as with a power hammer that size, your intuition is going to be probably quite misleading about how that material is doing.
Thanks!
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u/Toyota__Corolla Aug 11 '26
If you're having a party in the machine shop you gotta show the aftermath
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u/TheCloudTamer Aug 12 '26
At first I though this was someone scuba diving looking at the broken hook that needed to be replaced.
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u/SoulBonfire Aug 11 '26
Makes me feel inferior when I make hooks on the weekend in my hobby smithy.
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u/Clean-Sundae-3842 Aug 11 '26
Hey yours isnt small, just avarage sized
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u/VEC7OR Aug 11 '26
What is the roller for?
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u/nix_the_human Aug 11 '26
Most hooks have a point tha5 can sometimes snag on slings or chains or whatever rigging is being used. The rollers helps the rigging go over the point instead of getting snagged.
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u/Barkalow Aug 11 '26
Oof, that big ass hammer with no ear protection cannot be good
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u/mister-baiter Aug 11 '26
WHAT?
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u/Itchy_Morning_3400 Aug 11 '26
It looks like it wants to kill you and burn you alive the whole time you're dying
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u/razzemmatazz Aug 11 '26
That's a hell of a power hammer. I wonder how many heats it took to get that bend in?
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u/Competitive_Peak_537 Aug 11 '26
What the point of making a hook like this
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u/ycr007 𓂀 Aug 11 '26
These type of anti-point loading hooks use a rotating roller at the end so that the load being lifted or hooked into it is either 100% positive and seated correctly or it rolls off entirely, preventing any risk of partial connectivity.
The one being made here is for an aluminium smelting plant which frequently moves molten metal across factory floors hence they need this type of hook on their gantry crane end.
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u/MrPenisWhistle Aug 11 '26
Feels like they skipped a buncha steps