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

Brilliant work, thanks for sharing 👍

What an amazing lathe !!!

Love the sound of heavy cutting

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

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!

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

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.

Nice work Chris.

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

Congrats e thanks for sharing.

Good job

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

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

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

Lubie ten dzwięk jak wiór się sypie. Pozdrawiam 👍

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

I usually like guessing center of mass.

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. :)

fantastico!.

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

Стружка план выполнен😂

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!

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

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

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?

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?

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?

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

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?

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

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

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

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

I am working this machine

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

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

How long does it take to finish 1 shaft?

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

This saft raundness how many micron drefend

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

U use iso control ?

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

Which insert is use for turning of 6mm cut

Hi chris , Its an iscar insert for thread ?

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

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 :(

Fusion 360 will give you center of mass.

Making 1shaft messlie

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

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

太いからこれだけ荷をかけても大丈夫なんですね!

Почему без люнета? Жизнь не мила?

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?

If you are searching for a tool with a huge stepover and step down, this might be a good idea kzfaq.info/get/bejne/aq14qLVnl7yzh3k.html

4:56 - Particularly on a part which has shoulders, why not just lift from close to the ends? 12:19 - No use shaving the surface scale off. 13:20 - Never ran a CSS lathe; amusing to hear the RPM rise on a facing cut. 21:04 - Woulda' made it a larger support, JIC. Chris, when someone pauses a vid to study what you're showing, the red line remains in the image above the bottom. Please keep copy and drawings above that area so we can read all the info. Thanks.

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

4" 8 1/2" deep? Yikes!

Messile

Good job