Coil Box Mandrel Shaft, Cone and Cone Ring | Part 1| Heavy Machining | CNC Lathe

[@fokusano]

Znowu kupa roboty :D Ale tym razem juz dostalem odpowiedz na swoje poprzednie pytanie :) Dziekuje

[@semperfidelis8386]

5:37 you had to drill a 4' 8 1/2" hole???

[@ChrisMaj]

Sent for gun drilling

[@michaelkoch2109]

Es ist für mich immer wieder ein reines Vergnügen, Dir bei der Arbeit zuzuschauen! Das entspannt mich! Ein großes Dankeschön dafür! Liebe Grüße aus Dresden!

[@captcarlos]

Nice work Chris.

[@ChrisMaj]

Well, thank you. I'm trying to keep you guys entertained. But I still have work to do.

[@johnlawler1626]

Just guessing like you,sometimes I nail it sometimes (Monday mornings🤣) I don't ,great work thanks for sharing 👍

[@ChrisMaj]

Haha, yeah, Mondays are the worst.

[@kevind1865]

Do you face these shafts to length in the HBM when doing the centers, so you don't need to set up a steady to machine them all the way to the center in the lathe?

[@ChrisMaj]

That is the correct answer.

[@NickRno77]

I was wondering that 👍

[@ArthurField]

Love the sound of heavy cutting

[@warrenjones744]

I do enjoy the machining Chris, I like big parts! That is quite a lathe eh? You folks build some cool things. Cheers

[@jimsvideos7201]

The axle part, with a thumb size hole 4 feet deep, will hold most of a nation's strategic grease reserve. 😅

[@gwharton68]

Great video. Always fun to watch you working on small stuff.

[@ChrisMaj]

More small stuff is coming.😉 Cheers, Chris.

[@johnjohn-ed9qt]

For center of mass, you can calculate it, as several others have said, but, when I have CAD models available, I have the CAD system do it for me, and add the data to the prints. This presumes I know the machining/fabrication sequence that will be used, of course, so I can get the right CM's for the various stages and configurations.

[@IstasPumaNevada]

To calculate center of mass: (since the shaft is solid and the same material throughout, you can substitute volume for mass) For each different-sized cylinder section, measure the distance of its center from the end of the shaft, and multiply that by that cylinder section's volume. Add all those values up, and divide by the total volume. This will give you the distance that the center of mass is from the end of the shaft you measured from. So it would look something like (V1*D1 + V2*D2 + V3*D3 + V4*D4) / (V1 + V2 + V3 + V4) Volume of a cylinder is the cylinder's height (or in this case length, since it's on its side), times radius squared, times pi. Units used don't matter as long as you use the same type (cm, mm, inch, etc) for all the measurements and calculations. Pretty easy to do, but if you're good at guesstimating it might just be faster to guesstimate instead. :)

[@ChrisMaj]

That is too much math for my liking. I think I'll just stick to guesstimating 🤔

[@kw2519]

Why does he need to calculate that? We have constant surface feet in our G code. It automatically holds the programmed SFM with a G96.

[@thedutchgamerguy8580]

@@kw2519 this is not about programming at all... look in the video, he's asking if anyone has a easy way to get the center of mass of the workpiece, to lift it with the crane

[@flmag88]

@@thedutchgamerguy8580 maybe the crane is a cnc crane 😂

[@IstasPumaNevada]

@@ChrisMaj Fair enough. :) Thanks for replying!

[@FesixGermany]

Finding the center of mass... using CAD program to have it calculate for me or just estimating...

[@ChrisMaj]

Man, it's a one-offs shop. We don't have time for this.

[@FesixGermany]

Sure this would be a bit over-engineered but it would be possible technically...

[@henrykgwizdecki1359]

Lubie ten dzwięk jak wiór się sypie. Pozdrawiam 👍

[@ChrisMaj]

To brzmi jak sypiące się dolary.😉 Pozdrawiam zza wielkiej wody.

[@mitya82]

Great work, but i wonder, you always have already centerdrill on shafts. Can you make a video how you made center drill for tailstock support?

[@ChrisMaj]

It's always done on a horizontal boring mill.

[@DolezalPetr]

What an amazing lathe !!!

[@Everything_Engineering]

Do you notice the spindle load gets lower and lower as more of the material and weight gets shifted off?

[@ChrisMaj]

It's not the weight of the part, it's the diameter.

[@Splitfinger709]

Most of my parts fit in my hand... so I'm no help. But it appears your eyecometer is working well!

[@ChrisMaj]

Well, not always. Sometimes it takes a few tries to get it just right.

[@NickRno77]

Brilliant work, thanks for sharing 👍

[@zsuzsaraffai519]

Nice job, nice video. Just a friendly advice, for roughing operation like this is much better LH DCBNR tool with the same insert.

[@trieutran2114]

Hi, i'm from VIETNAM ,HAVE A NICE DAY !

[@AlexSilva-tm7iu]

Congrats e thanks for sharing.

[@Chris-kk8xg]

I usually like guessing center of mass.

[@johnchristianmelano8515]

Hi Chris just want to ask what machine do the center drilling of the part.

[@ChrisMaj]

Centers were done on a horizontal boring mill.

[@lordbartosz9416]

i love jobs like those long big and a lot of chips

[@markanthonysmith413]

Great video Chris, just out of interest how long would a job like that take from start to finish. Thanks Mark.

[@ChrisMaj]

That shaft alone took almost 3 days. The cones about 4~6 hours.

[@markanthonysmith413]

@@ChrisMaj Always great to see your videos Chris, I’ve been a Turner for 45 yrs but haven’t machined anything near that size Respect.

[@ChrisMaj]

@Mark Smith I'm trying to keep you guys entertained 😆. I'm just showing you what I can. I don't really have time to explain things, so what you see ,is what you get. This is definitely not a learning channel. It's more of a "show my work thing." I appreciate you guys' stick around. CHRIS

[@robertoswalt319]

@@ChrisMaj your comment made me think of "take your groupies to work day" Thanks for allowing us to watch over your shoulder.

[@TheNoobShadow1]

how many times u finish turn this thing u do it in sections or the whole shaft at once?

[@ChrisMaj]

I do it in sections because do to the length and weight of the piece, sometimes I have to adjust the program because of the taper.

[@balooc2]

how long does a roughing proccess like this usually takes?

[@berntinulkshredder]

You asked for the center of mass, you got to calculate the weight of each diameters over the different lengths, then try balancing them. Trying taking the total mass then start subtracting from the smaller ends with longer lengths and you will be right into it when the mass is just half!

[@ChrisMaj]

Sounds complicated 😉

[@berntinulkshredder]

@@ChrisMaj Not that much.

[@antongyrt4814]

Стружка план выполнен😂

[@Aguia_guiada]

fantastico!.

[@kunjangupta6907]

Good job

[@Kamil_Klukowski]

Hej! Co Ty właściwie toczysz? To są kawałki okrętów, czy kawałki kopalni? Z takim przemysłem mi się to kojarzy. Pozdrowienia że wschodniego Mazowsza!

[@ChrisMaj]

Większość do stalowni. Pozdrawiam Mazowsze zza wielkiej wody.👍

[@thedroolfool]

Wow I didn't know anyone used the larger CNMG6xx inserts.

[@어빙신]

Nice to meet you. What a great talent. Where this shaft use?

[@ChrisMaj]

Steel mill industry

[@batzlat1]

Dude you are a magician! I have one question - why do you sometimes have the coolant running and sometimes it is off? What does it depend on?

[@darknet180]

I love watching the videos, but wish you could give a sense of time. Like when you start at one end and make one pass to the other end, how long does that take?

[@davidpook5778]

I seldom cut anything that needs 2 hands to pick up......... I'd guesstimate if I needed to pick up something like Chris machines.

[@cyranox90]

How long does it take to finish 1 shaft?

[@florianlefebvre2568]

Hi chris , Its an iscar insert for thread ?

[@ChrisMaj]

Yes sir.

[@kw2519]

Interesting, my lathe had the control separate from the carriage so you could slide it back and forth on its own.

[@ChrisMaj]

I mean, you always need your control next to the carriage.

[@kw2519]

@@ChrisMaj I liked being able to be on the other end of the machine while it’s flinging hot knives at me lol

[@mintumintu3081]

U use iso control ?

[@RiyazKhan-bj9zt]

I am working this machine

[@josephwaldner7752]

Hey Chris how is the center in the spindle held in place?

[@ChrisMaj]

There is an insert with mt6 taper. Here is a video how I take it out. kzbin.info/www/bejne/inqUi4aLicmKoLs

[@josephwaldner7752]

@@ChrisMaj thanks

[@dipenkadam1941]

Which insert is use for turning of 6mm cut

[@ChrisMaj]

CNMG644 KENNAMETAL KC9125

[@mintumintu3081]

This saft raundness how many micron drefend

[@frankfelix5851]

Do you ever have sagging issues with a part this long ? How do you deal with that issue if it occurs ?

[@ChrisMaj]

Steady rest is probably your best option for sagging. I didn't really notice any on this job.

[@frankfelix5851]

@@ChrisMaj Most excellent, enjoy your videos.

[@dawszelka5461]

Po ile kg materialu zebrałeś z tych 3 częsci ?? z tej pierwszej to pewno z tone albo wiecej ;D Pozdro ! :D Jesteś mistrz ;D chcialbym byc chociaz w polowie taki dobry jak ty :D

[@ChrisMaj]

Wiór to tu już nikt nie waży, ale parę wiaderek byś napełnił 😉. Taki dobry to nie jestem, to tylko tak na kamerze wygląda. Poza kamerą leci litania

[@zubol93]

Witaj, z tego co widzę to używasz bardzo niskiej prędkości skrawania do obróbki zgrubnej ( z tego co wyliczyłem to ok 70M/min). Nie wiem czym jest to uwarunkowane (moc maszyny lub wytrzymałość płytek?) Ja na mojej tokarce DOOSAN Puma 600LM 2015 (55 kW) do obróbki zgrubnej (materiał ten sam co 4140 QT czyli po polsku 40HMT lub europejsku 42CRMO4+QT) daję Vc 150M/min, DOC 6mm, F.5. Płytka LNMX 150608 Iscar gatunek IC907 wytrzymuje do 1.5h obróbki, cena za 1 sztukę ~7 EUR. Fakt że jest to tokarka w pełni zamknięta i wiór bez zamkniętych drzwi pewnie latałby po całej hali. Pozdrawiam serdecznie, chciałbym zapytać jeszcze jak w stanach wygląda zapotrzebowanie na operatorów/programistów cnc? My w Polsce mamy ogromne braki personalne no i w naszej firmie jest bardzo dużo zamówień i nie jesteśmy w stanie wszystkiego wyprodukować na czas. Niestety zarobki dalej marne >1500 USD brutto :(

[@ChrisMaj]

To moja ma tylko 26kW. A mówimy o podobnej długości i średnicy? Z pracownikami jest bardzo ciężko, ale to chyba wszędzie.

[@zubol93]

​@@ChrisMaj Moja tokarka jest mniejsza, Lmax=3237 Dmax=1012. Uchwyt Samchully 530. Parametry jakie podaję są dla wałów o średnicy D=~400. Obciążenie maszyny na parametrach jakie podałem na pierwszej przekładni (M41) wynosi >50%. Fakt maszyna jest bardzo mocna i potrafi zniszczyć narzędzie bez przeciążenia jeżeli operator nie zareaguje w porę (niestety coraz mniej doświadczonych pracowników u nas a każdego nie jestem w stanie pilnować cały czas) Natomiast mam jeszcze mniejszą tokarkę Gildemeister CTX 510 2007 (Lmax 1000, Dmax 450) o mocy ~35kW i ona jest w stanie toczyć tym samym narzędziem z tymi samymi parametrami do średnicy Dmax 280 ale obciążenie oscyluje w granicy 80-90% tylko tutaj mamy do czynienia w elektrowrzecionem.

[@jimsvideos7201]

Fusion 360 will give you center of mass.

[@ChrisMaj]

Haha, I don't even use it for programming 😅

[@pavelpavlov142]

Не хватает немго комментариев за кадром, и ускорения видео в некоторых моментах!

[@ChrisMaj]

В моих видео нет ускорения. Что вы видите, то и получаете.

[@pavelpavlov142]

@@ChrisMaj я и говорю что их нет, а немного не помешает.

[@Fabian-dp4re]

Some "experts" say that intermittent use of coolant can give the insert a thermal shock and break it. I see you don't listen to these people. I can see you do this pretty often and I therefore ask you: Have you ever experienced this?

[@ChrisMaj]

Some inserts will actually crack/break on you, but by now, I know which ones.

[@ShainAndrews]

By experts you mean manufactures? Because they are the first to warn of such instances depending the the specific insert.

[@darshankumar-bx1001]

Making 1shaft messlie

[@アナザー5029]

太いからこれだけ荷をかけても大丈夫なんですね!

[@СтаниславЛаричнев]

Почему без люнета? Жизнь не мила?

[@Watchyn_Yarwood]

4" 8 1/2" deep? Yikes!

[@TheMetalButcher]

Who beat the hell out of the outside of your 4 jaw? Haha

[@ChrisMaj]

I'm not sure what you are talking about 🤔

[@TheMetalButcher]

@@ChrisMaj Dings by the pinions.

[@ChrisMaj]

@@TheMetalButcher time stamp it?

[@martijnbar9440]

If you are searching for a tool with a huge stepover and step down, this might be a good idea kzbin.info/www/bejne/anirpoVsZ7uCjac

[@ChrisMaj]

Yeah, I watched that video, but these things are pretty expensive, and he's running some crazy speeds. I don't know if I want to do that with almost 5000 lbs of steel.

[@ShainAndrews]

You need to understand the entirety of a process. You just provided a video where he is working on material with minimum sickout a machine capable of 1000psi coolant pressure, and really high surface speed. Find a video showing 117" of material spinning between centers duplicating everything above. Love to see the taper of such a cut. CNC has it's place. A place that is not typically in one off parts production. If a manufacture has to make a thousand of these then the production process can be optimized for it. Risks are significant. Lost cost of the material, the sunk time prior, the machine, what happens during a catastrophic failure? Can the machine save itself when 4-5K lbs of material is spinning that fast? Probably not.

[@darshankumar-bx1001]

Messile

[@mecatech564]

Good job