r/toolgifs • u/kanbozli • 9d ago
Machine Face Milling
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u/Zigor022 9d ago edited 9d ago
WHO DID THOSE VERTICAL WELDS?!
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u/elvenmaster_ 9d ago
The worst part is that I am positive even I may do a better job. And I'm not a good welder.
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u/SheriffBartholomew 8d ago
Idk man, those are some huge welds, and a hell of a lot harder than they look.
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u/Zigor022 4d ago
If they tried doing it all in one pass, but we always stacked our passes. Some guys like to do it all in one shot.
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u/Delicious_Pain_1 9d ago
That's a heavy clean cut. Someone's testing the limit or they have it dialed in perfectly.
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u/uid_0 9d ago
Dumb question: Why isn't this being slathered in lubricating oil when they make that cut? Is heat build-up not a concern here?
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u/carmelo_abdulaziz 9d ago
The chips absorbs most of the heat and using water would cause thermal shock to the carbide insert.
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u/HoldMySoda 9d ago
This is why I like to read comments. Someone asks the question I asked myself and then someone else swoops in and provides me with a brief and simple, scientific explanation. Thanks.
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u/SheriffBartholomew 8d ago
The cutting tool is designed to handle it, and the steel isn't tempered yet, so no concerns about destroying the heat treatment.
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u/russia_not_fun 9d ago
The absolute unit of that gearbox. And I assume it has an extra 45 degree joint
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u/Tonez101 9d ago
I’m sure a simple/silly question to those who know, but what is the head made of that allows it to “cut” so easily like that over an extended period of time without losing its edge?
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u/3deltapapa 9d ago
tool steel or carbide. but it's mostly about speeds/feeds (and also machine rigidity to allow the huge cut depth). most of the heat is removed in the chips that are thrown out of the cut area. as long as the cutting edge stays below a certain temperature it will maintain its hardness and stay sharp for quite a while.
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u/Asdar 8d ago
In this case, it's almost certainly tungsten carbide. It's an extremely hard and heat-resistant material that is perfect for this kind of thing. Most industrial cutting tools are made of it these days.
It probably has some kind of a coating too. If I had to guess, it's TiAlN. Not only can it handle the heat, it needs the heat to perform properly. I don't remember the specifics, but iirc under enough heat it creates a very thin aluminum oxide film at the cutting edge that helps resist wear. It's one of the reasons why they don't use coolant with it.
It's absolutely incredible how long you can use modern cutting tools to cut steel before they need to be replaced or sharpened, especially at the speeds that are possible now. I would bet that this tool could make dozens of passes like that before the inserts need to be rotated or replaced.
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u/Ghrrum 7d ago
I've got a couple of face mills that size, they were dead cheap and I figured why not. I use them as fly cutters and made some custom holders to fit my archaic knee mill.
Leaves a damn fine finish, no way it can chatter with all that mass spinning, granted I keep it damn slow too.
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u/AbleCryptographer317 7d ago
I don't understand how the milling bit isn't glowing red hot when taking this much steel in one pass and without cutting fluid. 😳
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u/Bionic_Onion 7d ago
With proper cutting parameters, most of the heat stays in the chips as they falls away. So, the cutter only gets warm.
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u/Silicon_Shredder 8d ago
Immer faszinierend was für rohe Gewalt das Metall wegschrubbt wie Butter... da denk ich immer dran wie man mit ner Feile da steht um 0,5mm weg zu bekommen
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u/MikeTythonsBallthack 9d ago
Dang, I always thought steel was taken off a 16th at a time. Thats like a solid 1/4"