Different Line Shaft, Different Approach. Rough & Finish. CNC Lathe.

• Herringbone gears / Do...

[@Thewaldo12345]

Gotta love seeing your work that you hit every tolerance and they grind the shit out of it during assembly.

[@ChrisMaj]

Haha, somebody knows what he's thinking about. You are right about that, but the grinding marks are on old spacers that go on the line shaft between bevel gears .

[@geoffgreenhalgh3553]

Long shafts can be a nightmare! Good work.

[@ChrisMaj]

Especially when they get some shitty material that is moving all over on you.

[@hanhdhsj]

I know, I got a really long shaft. It gets in they way all the time while on the toilet...

[@Michael-ci3fz]

@@ChrisMaj especially new material, old material is better

[@alumal]

Here I machined a 3 m long shaft projected in a 55 mm diameter tube. It's a shit^2! Nice job!!

[@tony2times284]

Nice job, long shafts are a pain! What program software do you us? I can tell the CSS is on because the RPM changes with the diameter.

[@mauricioboldrin1512]

Hello Chris!!! I'm from Brazil, congratulations for your work.

[@johnsutcliffe3209]

So good to see it assembled. I like watching these but so many times you are left guessing what the part is actually for.

[@derekduval8168]

Big big engineering... respect dude!!! Awesome work!!

[@ChrisMaj]

Big thanks

[@MR-yq5rj]

Nice work Chris ! Can you explain one time the steps you take to make long parts like this to keep it straight ? What is youre step plan from start to finish a long part. Like what side you ruff cut first, where to put you're steadyrest, how much stock you leave for finishing, where to indicate . And why you take those steps in you're plan to make a part . I think it will help people a lot to understand it more what it takes to make long parts within tolerances. Greatings Michael

[@jayz1719]

Man didnt know you could put that much weight on the center when roughing it. Cool.

[@rodrigomolina5475]

Muy bien amigo chris bonito vídeo me gusta ver como deja los acabados en ese torno, y sobre todo que no vibra en largos grandes

[@Kei22]

it is a little more difficult when doing long prayers like that, I have also experienced it. good job guys ! 🇮🇩

[@TexDrinkwater]

I've been impressed with some of the heavy shafts that Adam Booth (@Abom79) used to make, but this is a whole other realm. Nicely done!

[@michaelkeymont501]

I remember when I bought my Harbor Freight 7x14” mini lathe, thinking “What would I ever want to turn that would be longer than 14 inches???”...

[@TheMetalButcher]

Then you discovered that with a drill chuck and jobber drill, you could only do like 2"...

[@zuczekdrive3951]

No dobra robota ja też toczę na tokarce CNC i jak ty lubię wyzwania a materiał cm robiłeś to jest dziadowski do roboty 👍👍👍

[@ChrisMaj]

Jak się nie mylę to cm to jest stal nierdzewna tak? U nas to całkiem inne nazwy używają od europejskich.

[@artmckay6704]

wow, Chris, that's one whale of a looooong shaft! What is that, about 30 feet long? Wow! That is just amazing! Thanks for sharing! :)

[@zainaltbq9469]

Good machinest my frem. I like 👍👍

[@captcarlos]

Challenging work indeed! The fitters had their own challenge as noted by the grinding! Thanks for the vid.

[@ChrisMaj]

The grinding marks are on old spacers that go on the line shaft between the bevel gears. This was a repair job so they used some old parts.

[@boominathanvijay3720]

Very good

[@jameshinsley6766]

Nice work

[@ChrisMaj]

Thank you! Cheers!

[@toddp9541]

Never got to play with long parts like that, but made large impellers for acid pumps with long shafts, awesome video 😀

[@Reesefo]

i recently graduated highschool and thats what i do now

[@luki26xy]

Elegantly . What are you doing cam in?

[@CarlHargreavesRustyRelicsUK]

Thank god for ceramic inserts !

[@robertriquelmy7193]

Interesting, how much does it sag under it’s own weight?

[@mustii3473]

Eline sağlık Üstad 😉😉 Ben bunları Manuel TORNA da yapıyorum..

[@Sensorama2000]

Wonderful!

[@CabalDungeonMaster]

Nice Toothpick u got there :D

[@sambor7433]

Another one good job! where is your workshop? Probly cant say haha ..... gotta love these machines

[@ChrisMaj]

Let's just say that I'm in the US.

[@jaredjohnson3043]

Great video as always Chris! Were you forced to turn away from the chuck because of the length of the part and location of the different features? What introduces the runout on the finished part when you turned it all between centers? Internal stresses in the material? The chuck and/or the steady rest causing stress on the material?

[@ChrisMaj]

Yeah, the shaft was long and it had that flange. I think it has a lot to do with the type of material you use. If you watch my other line shaft video you will see that thing just went south on me. We had to send it for straightening and stress relief and then I was able to finish it. So yeah, most of the time it's the material, but also the tools you use and you can't take big cuts cause it puts too much pressure on the shaft and you will never get it to run straight.

[@artmckay6704]

I'm betting, too, that some slop is from the shaft sagging a little under its own weight, like a long steel cable sagging from its unsupported weight....... just maybe?

[@antoniorivera5066]

Hola christ saludos cordiales desde cd obregon Sonora México bonito trabajo de torno mi hermano tiene un taller de torno y soldadura el rayo saludos I dont speakin inglis ✌️🇲🇽

[@khaliddali5160]

Bon Travail bravou 👍👉😎🌴🌿

[@cengizerol9256]

Great job Chris, Congratulations. İ like your videos. Love from Turkey. Take care yourself

[@phillipwebb3309]

Nice work. Do you allow material to stress relieve. What is TIR tolerance?

[@ophirb25]

How come there is that runout right after machining it? Is stress related, long part related? In any case great production

[@marcelocampos31]

Perfeito 👏👏👏👏👏

[@michajasina7418]

Jakoś niezbyt twardy materiał po dzwięku słychać , oni ci chyba robią nazłość z tak długimi detalami i patrzą kiedy spuchniesz ale ty jak zawsze z klasą co ja nie zrobie ( jak nie ja to kto)

[@ChrisMaj]

Materiał 1045, C45 po waszemu chyba. No robię co mogę ale ostatnio coś przesadzają z tymi długościami.

[@Michal_Sobierajski]

@@ChrisMaj C45 to bardzo fajny materiał do obróbki 😁

[@NJUSAWEST]

This is good size long for my machine.

[@juancatalan631]

Es bkn Trabajar el acero yo trabajo en lo mismo y hágo ejes, es genial.. Saludos desde Chile

[@Michal_Sobierajski]

No steady rest? No chatter?

[@joshmdmd]

Nice machine. Which one is it. I'm looking for a CNC lathe that's maybe 18-24" dia by 120"+ long. Not too many people run manual anymore. Hard to find employees. Need to switch over.

[@ChrisMaj]

Hankook PROTEC-9NC, 25" swing over carriage, 157" long.

[@joshmdmd]

@@ChrisMaj I found some used ones but they say 79" between centers?

[@gujjar9674]

Love you ❤️🙏

[@nikolaiownz]

Nice job. I always struggle with the longer shafts on My lathe haha. Does this lathe have a chip conveyer? You seem to do alot of jobs where there is alot of materiale to be removed.it would suck to showel All that haha

[@kyledombrowski7051]

I believe in the center of the bed there is one, but I could be mistaken

[@ChrisMaj]

Yes there is a chip conveyor kind of hidden behind the machine.

[@LegoMan-cz4mn]

@@ChrisMaj interesting! I do wonder what happens with all of the chips, do they get re-forged into new material or are they useless?

[@ChrisMaj]

@@LegoMan-cz4mn Yeah, they're picked up by recycling company.

[@arry4264]

I use a TPMR 16 03 04 for finishing long shafts.

[@ChrisMaj]

Any specific reason?

[@arry4264]

@@ChrisMaj Positive rake reduces cutting pressure and vibration i have found.

[@ryanb1874]

Are you only turning 5x diametr sections s of length on either side of steady rest?

[@jimsvideos7201]

Neat!

[@juancatalan631]

Cuanta horas hay en ese proceso terminado

[@philliplopez8745]

No steady rest while debarking ?

[@thomaskruger6468]

Hätte er gleich mit der Linette gearbeitet dann hätte das Teil auch gelaufen 🙈❗

[@Taylor.Project_TT]

Nearly 4mm doc @ 0.6mm/rev holy shit that machine has some torque. A HAAS could never🤣

[@cleiltonsoares9412]

tenho q ensinar esse cara à trabalhar

[@ChrisMaj]

Se você tiver alguma sugestão, estou ouvindo.

[@andreweppink4498]

Any taper problems?

[@Gkuljian]

Spec is a thou?! I'm glad I never machined for a living. I'd have less hair than I already do.

[@ChrisMaj]

Yeah, it can be stressful a bit.

[@beelzebowler]

I often make pump shafts that are up to 86” long that have around 0.0004” runout tolerance from end to end, with several dimensions also toleranced to 0.0004”. And threads. On a manual lathe that was commissioned in the 1950’s 😂 It’s all about the set up. If you don’t get your workpiece running true from the start, you’re screwed.

[@zevanyafelicia3812]

Very long shaft, how you handle the Metal forging tension after lathe

[@sudeshbhola5638]

When i join

[@DolezalPetr]

what is the taper in such a long shaft?

[@ChrisMaj]

I think I got it within 0.002 "

[@mattcaesar5781]

I have a dumb question. How do you put a center inside the chuck so you can machine between centers

[@ChrisMaj]

You can see it in this video kzbin.info/www/bejne/mmrPlqWGaN6rZqs

[@snowman7672]

How much chuck and tailstock pressure did u use? And how do you calculate for chuck and T.S. pressure?

[@ChrisMaj]

Chuck and tailstock, all manual

[@snowman7672]

@@ChrisMaj thanks for the response..the reason i was asking about chuck and T.S pressure is, i run alot of shafts, 60 inches up to 130inches in length, and have a decent method, but i would like to fine tune the pressures and have not had any luck finding any info that i can decipher...my machine has a graph plate on it for pressures but ive been unable to figure it out...anyways, awesome work u did on the shaft...👍

[@HolzDennis]

How many Hours did the Final cut take?

[@tiagobickel]

Cnc Machine?

[@jameswood9764]

Man you got the shaft?

[@kylesickelsteel1102]

How many times did you flip the part?

[@ChrisMaj]

I think 6 times

[@contrnsmagnificndjoobngtaint]

what is this a part to?

[@ChrisMaj]

In this video there is a similar shaft. It's used in steel mill industry.kzbin.info/www/bejne/i2SbpIuCd5ySrM0

[@therussianmachinists2409]

How do you keep it from vibration?

[@cevdets.5921]

Steady rest..

[@bilalahmmad3608]

Sir why it's runout in center I am making 2.5 meter long drill line spooler shaft when I removed studyrest after final size it's runout is 0.6 mm

[@bilalahmmad3608]

Material is 4340

[@bilalahmmad3608]

Same picture on my account

[@walidossodi2200]

the long shafts ,Where it can be used ?

[@ChrisMaj]

Steel plant

[@drubradley8821]

This was really neat... Does anybody know, if this alloy 1045, after say, it has been totally machined round, with say less then (0.001") or run out, while still being this long, and you left it chucked up on the lathe, and then went on vacation/holiday, would this example start to sag, from its own wait, in that amount of time, that length, this alloy 1045? Just curious... This was a really neat video. I could only imagine the time it took to hog off just one pass, let alone 50 passes to get to size requested... DAAAAAAAAAAYS...

[@ChrisMaj]

Two days, start to finish.

[@drubradley8821]

@@ChrisMaj Impressive, on the time, but, does this long part due to its own weight, want to sag in the middle if left for a certain amount of time?

[@joshmdmd]

@@drubradley8821 time and sag are not related. It's machined with a steady rest so that it is kept reasonably straight. As soon as it is off it's not straight anymore. All steel is like a spring until it isn't. There is only elastic deformation which springs back. Permanent or plastic deformation if it is bent too far.

[@drubradley8821]

@@joshmdmd Roger that.. Was just wondering, based on how long this is, and of course, how heavy it is... Thank you for answering this.

[@柳利峰]

你那个中心空是怎么钻的

[@ChrisMaj]

在卧式镗床上

[@ryanb1874]

Would a tailstock chuck be more inaccurate, , how can the little bearing live center hold that atrocious weight?

[@andreweppink4498]

Seems like it'd be better to leave it roughed then centerless grind it.

[@andreweppink4498]

Nuts. Maybe not. Didn't notice all the shoulders etc.

[@paulrobinson8049]

Why not use a follower rest

[@ChrisMaj]

Well, that's easy. I don't have one.

[@denisbl4412]

Let me guess, around 2-3 days work on this?

[@ChrisMaj]

Yeah, almost 2 days and that does not include keyway milling.

[@denisbl4412]

@@ChrisMaj yeah sure, I meant only the work on the lathe

[@daviduhren5353]

What is the Name of this Machine?

[@ChrisMaj]

Hankook PROTEC-9NC

[@shivamnaidu3716]

Why don't you do forging jobs??

[@thomaskruger6468]

Ich Frage mich sowieso wo er die Linette platzierte während des gesamten Arbeitszykluglusses ❗Immer so kurz wie möglich ❣

[@michaelarias7324]

How do you indicate that part? And what feeds and speeds do you use ?

[@ChrisMaj]

It's all done between centers so there isn't much to indicate. You just have to make sure you don't move the shaft to one side with your chuck jaws. Feed 3:10 ,11:30. You can also check out this video kzbin.info/www/bejne/mmrPlqWGaN6rZqs

[@TSMundora]

@@ChrisMaj Just out of curiosity, is your depth of cut on the radius or diameter?

[@nikolaiownz]

@@TSMundora depth of cut is always is the depth of the cutter. Ergo radius on the part. 😁

[@ChrisMaj]

@@TSMundora It's per side

[@florian821]

@@TSMundora Radius, 6 in Dia would be nothing for a Machine that size.

[@eicherundeigenbau7283]

Heftig

[@SilentPartner79]

Oops, too much egg, it's scrapped *removes part from chuck and tosses it over shoulder; screams are heard*

[@andrewstoll4548]

Not to sound like a complaint. But that blue color font is hard to read quickly. A different color and leaving it up a few seconds longer would be great.

[@ChrisMaj]

I'll look into it

[@spikeypineapple552]

@@ChrisMaj White text with a black outline is readable on any background.

[@ChrisMaj]

@@spikeypineapple552 Yeah, I think I will try that.

[@RealNotallGaming]

6:50 You are indeed a noob (facepalm)

[@ChrisMaj]

Would you please enlighten me.

[@ЭдуардБеркутов-ь1ч]

Не пойму, зачем показывать биение, выведи его в 0 и тогда похвастайся...

[@juancatalan631]

Es bkn Trabajar el acero yo trabajo en lo mismo y hágo ejes, es genial.. Saludos desde Chile