This reminds me of that old cartoon where couple of workers were heading to a pub "to have a few beers and forget for the day about their jobs", and the works they were leaving had a big "United Brewery Co." sign on its gate... ;-)
Lord i miss manufacturing! Been enjoying your videos! Wish i could have taken some vids of my past work. CNC, Conventional, QA, QC, NDT/PT MAG & UT was my past Cert’s.
I wonder if tolerances that tight were actually necessary, or if it was just some Boss going "I want it _exactly_ on dimension." Actual engineer: "But, sir, we need to give them tolerances." Boss: "Tolerances? Bah, these machinists are so fickle. Okay, what's the smallest they can get the part size wrong?" Engineer, wincing: "Well, they _can_ get down to one thousandth, but that's usually for much smaller--" Boss: "Then put one thousand on the paper. Come on, I want this order out by 3." Engineer: "For which measurement?" Boss: "All of them! You think I want a drive shaft that's the wrong size?"
Could be, but as the guy who spec's those for our products, time spent discussing the issue with suppliers give us a pricing competitive advantage. And then, half-thou tolerances in the middle with looser ones at the ends tells me someone looked at it carefully, groaned and spec'd 'em.
Wieder einmal ein sehr schönes Video! Am liebsten würde ich hinter Dir stehen und direkt zuschauen - obwohl ich weiß, daß dies niemand mag. Man läßt sich bei der Arbeit nicht gerne über die Schultern schauen. - Hau rein! Weiter so! Ich freue mich schon auf das nächste Video! Beste Grüße aus Dresden! PS.: Den Australier von CEE schaue ich mir auch sehr gerne an. Der hat es auch drauf!
Ja, du hast Recht damit, dass du über deine Schulter schaust. Das ist, wenn die Dinge schief gehen. Kurtis und seine Frau aus CEE, sie haben das ganze RU-vid-Ding herausgefunden.
You know how it is. Boss: I got this job 0.001" tolerance. Can you do it? Dumb me: Yeah, I guess. Boss: Ooo. By the way, this thing is almost 4 meters long and there is a little runout .
@@ChrisMaj runout of 0.001" for 4 meters long shaft is nothing . You can always do grinding and make this much tighter if you need it , but this will cost much more .
It's amazing to hold such a tight tolerance on such a long piece. Great skill. The ways must be perfect to hold .001" on a diameter. My old Okuma could never do it.
Hey Chris, could you do a video of how to use the manual guide on fanuc control like programming a part from start to finish that would really help me out?
I kolejna robota na plus , że też często przychodzi materiał zdeformowany i z tak małym naddatkiem a ty się pózniej męcz na maszynie jak to ogarnąć . 👏👍
@@PawelSzkoda Polak, Polak tylko pracujący w Stanach i trzeba było się przestawić na cale. Jak narazie to mało mam rodaków na kanale, a poza tym to i tak nie jest jakiś szkoleniowy kanał. Co tam poskładam to tyle widać.
That’s awesome lol Biggest I’ve done is 245”x10” 17-4 ph. Do you guys ever press the shafts to straighten them? We had a giant hydraulic ram captured around a very large and long i beam. I’ve bent some damn thick shafts 😂
Amazing work. I'm not a machinist but I can appreciate the magnitude of getting within a half thou on something so massive. What does something like this go into?
Wow even the bearing fits on rock crusher bores I repair are more generous than that for example 400.00- 400.05 mm, at least I get a couple thou to try to hit. And the housings typically are not bent! How many times did you have to flip it end for end?
Ooo zmora każdego tokarza.. krzywy pręt.. i to ten to był porządnie krzywy.. 7 dych do zebrania a tam jeszcze bije.. ale trafiłeś na pręta to.. współczuję.. przerabana robota z takim bananem .
@@ChrisMaj no to kij w dupę temu co to zamawiał .. nie lubię jak ktoś tak robi bo zawsze może się coś odwalić jak np u ciebie .. dobrze że udało ci się to bicie zbić do 2 setek .. ;D ale pewno co się nawkurzales to twoje . Pozdro ;D
What industry is this part for, do you know? Awesome job as always...! Watching raw ugly stock changing into beautiful shiny part is really satysfying.
@@FuzzyPanda53 that's a long course you have to take to figure that out. sometimes the stress in the material makes it dam near impossible to get it straight. flipping it lots, keeping the forces low, aka light cuts and minimal tail stock pressure is important. also after roughing letting it "rest" for a day can help some of the stress come out. basically you have to just take it as it goes with long parts you use your years of experience to figure it out and come up with the best outcome, aka get a pro like this guy to do it ;).
0:11 - How did you drill the center hole? 3:12 - That's *DRILLING*! 5:11 - REALLY appreciate the drawings to better follow what you're doing. BTW, the lettering looks like a 'pencil-CAD' drawing? 5:15 - Hope the estimator allowed enough time to hit +/- half thou. 5:30 - Get closer to the end, and they give you tolerances you could hit with a file!
Gun drilling is primarily used to drill deep holes beyond what is possible with conventional machinery and tooling such as twist drills, by using high pressure coolant for clean chip exhaust, even at extreme depths.
A 4 jaw chuck is more adjustable and way more versatile than a 3 jaw. With a shaft with this kind of run-out you can throw the job out at the chuck to make the middle run better. I do 4140 shafts like this alot at my job. We have the same machine as him with a 4 jaw chuck. I had to turn a shaft like this that had .500 runout in the middle if I ran it true at the chuck. So instead I threw the runout to the chuck and made the middle run around .300. It makes it alot easier to machine.
Więcej materiału zbierasz, bardziej odpycha narzędzie przy dużym biciu. Zauważyłem że po ciężkich sztukach niekiedy koń ucieknie parę tysięcy. Niekiedy trzeba pocyganić któryś tysiąc w programie.
@@ChrisMaj maszyna ma sterowanie NC, możesz korygować stożki w programie? I drugie pytanie dlaczego podtrzymka jest tak blisko wrzeciona, a nie powiedzmy w połowie. Świerzak ze mnie, i mam narazie takie rozkminy. Toczę w kłach bez podtrzymki wał na 900mm i o średnicy maks. 78mm, udaje się zrobić wymiar w 0,01 ale muszę korygować stożek w programie bo robi 0,07 na 140mm. A to co widzę u Ciebie jest niesamowite 25 mikronów tolerancji na takich gabarytach, sztos.
It scares me watching this, doesn’t bare thinking about what devastation would happen if you lost pressure on the centre. I was wondering how do you get the centre drilled ?thanks for Chris 👌🇬🇧🇪🇺🇺🇦
I never go to work thinking I'm gonna fuck up something today. I'll crash my machine today. The lathe is going to hurt me today. If I did, I'll probably be working in the office somewhere. Don't get me wrong, I have a lot of respect for my machine, and I know she can fuck me up in a split second. That why you never get to cocky around any machine. The centers were done on a horizontal boring mill.
It scares me too . I understand that machine is capable to do that, but there is always some risk. Second thing is price of the stock, and stress not to make any mistake to scrap it . Pozdrawiam i powodzenia :)
I do shafts like this all the time not tight tolerance usally plus 0 minus .003 inches for the whole length with a straightness of no more than .015 inches. I usally drop a s/r in near the chuck get it as close as I can and work from the chuck back toward the tailstock by cleaning up a 3inch long section to make a s/r location. Set the rollers and then move about 12 to 15 inches toward the tailstock and repeat the process. Once you get the s/r just passed the center point of the shaft you can go to the tailstock and ripped the material off. I usally go .150 deep a side so .300 total and they always come out fine.
I am working on a shaft right now at my job that is 3.5 o.d and has .250 runout in the middle. It is 124 inches long and is 4140. Looks just like this shaft but smaller. It has been kicking my ass. It took me 4 hours just to get the s/r locations in so I can start the process of ripping the shaft down to 3 inches.
This job looks like a serious pain in the bum. You almost need a vertical lathe tall enough to cut bands for steady rests, but back in the real world where you use what you have...
Qualité 6 en tournage extérieur ! J’ai un doute . Il faut travailler avec les intervalles les plus larges possibles. C’est au concepteur de le savoir . Sinon les prix s’envolent. La qualité coute cher . Si elle est inutile......
