What a chunk of metal! I'm always impressed by the amount of material a small carbide insert can remove. I grew up with HSS and a rare brazed carbide tool (I am old as the hills). Beautiful job as always. I very much appreciate your videos. Thank you.

@ChrisMaj

2 жыл бұрын

Thank you Mr. Boschek. I've only used two insert corners to rough this thing. Yeah, I still remember the HSS and brazed carbide from trade school.

Even though I’ve been machining for twenty years, I still enjoy watching the big turnings

@ChrisMaj

2 жыл бұрын

Yeah, that makes two of us. I'm doing this every day and still watching machining videos.

@mftmachining

2 жыл бұрын

@@ChrisMaj You´re a real Machinist. Same here...makes three of us...

After 51 years as a fitter turner using machines similar to yours you've done well to machine that bar without using a steady of some sort, never mind how many setups you had, well done.

@ChrisMaj

2 жыл бұрын

Thank you, I appreciate it. It's always good to hear some positive feedback from someone who knows the trade.

Nice job, as always. I gotta say the reflections at the roughing stage were messing with my head, everything looked bowed!

Whoever is the owner of the shop you work for, they better be so damn grateful to have you on the payroll. Your work is excellent. Next thing you have to do is pass down your knowledge to an apprentice from a master machinist.

@ChrisMaj

2 жыл бұрын

Thanks a lot. I'm definitely showing this comment to my boss. 😂👍

@kw2519

2 жыл бұрын

Shitty thing is, he probably doesn’t make more $35-$40 an hour. We’re seriously underpaid in this trade. I did exactly the same type and size of work, I capped out at $35. So I left and wound up finding a shop that pays half the labor quote to the machinist. I make $150k-$200k because we support several microchip manufacturers. I got really lucky, I found a unicorn shop 😂

@fosterlewis7360

2 жыл бұрын

Yeah, this is a pretty astonishing job. And you do a lot of impressive ones. A new spindle that size, keeping it in shape and within tolerance… wow.

@gordongallacher2449

2 жыл бұрын

@@kw2519 that more than we get in the UK most undervalued trade there is!!!

Large turning videos never get old. This is real professional grade work!

@ChrisMaj

2 жыл бұрын

Large turning videos are fun to watch, but actually doing the work is even more fun and a little stressful .

@piter_sk

2 жыл бұрын

@@ChrisMaj I´m running a small CNC lathe - Doosan Lynx 220LM (not using live tooling) and that´s a little stressful sometimes..... this? I´d be shivering all day long for few weeks before I´d get into it... Great job Chris!

@ChrisMaj

2 жыл бұрын

@Peter Szöke It takes a little bit to get used to.

@piter_sk

2 жыл бұрын

@@ChrisMaj Toolmakers has one Trimill VF 6535, the biggest portal milling machine we have.... X6500 Y3500 Z1400 5 axis.... that one takes balls... I´d love to work on a machine like you have or do some bigger work.... my longest program ran about 18 minutes (180mm aluminium stock maybe 150mm in lenght - it was terryfing to see it swing in that little 180mm 3 jaw) but it´s 6 minuts and less here...

Nicely done... Always nice to compare it with the old one at the end.

Very impressive sir! I've been making chips for 30 years. It's refreshing to see someone who takes pride in his work. Keep up the great work!!

@ChrisMaj

2 жыл бұрын

Well, thank you. I appreciate it. I like machining, and it all looks good on the video, but you know we have some shitty days in this trade.

Great piece of turning and well filmed thanks for sharing 👍

_Chris, thanks for showing the blueprints!_ 👍 _I always pause the video and study them._ 🧐

@cschwad559

2 жыл бұрын

Me too!

@ChrisMaj

2 жыл бұрын

I'm trying to show what I can without getting in trouble 😉. Thanks for always watching and the comments.

Love it as always! Thanks for showing us. How did you know where the center of mass was to spin it around??!?

@ChrisMaj

2 жыл бұрын

It's always a guessing game.

Super jak zwykle ;D dzieki że pokazujesz ile materiału zeszło na obróbce ;D zawsze mnie to ciekawiło i strzelałem haha tym razem tez mi sie udało mniejwiecej strzelic ;D

@ChrisMaj

2 жыл бұрын

Na surowym materiale przeważnie pisze ile waży, a później to ciężko powiedzieć ile waży, chyba że jest waga końcowa na rysunku. No tu poszło sporo w wióra. Dzięki za obejrzenie i do następnego.

Always good to see videos like this keep them coming 👍👍

Fantastische Arbeit. Schaue das immer gerne. Habe ja auch diesen Beruf gelernt.😊

Amazing work like always!

@ChrisMaj

2 жыл бұрын

Takie wałeczki to jest moja ulubiona robota.

Very nicely done without a steady rest!

Good to watch ,Thanks for posting.

Beautiful !. Looks like the the "old" 4 way toolpost is still one of the most rigid set ups for turning tools , compared to the quick change type ?.

@ChrisMaj

2 жыл бұрын

I've never worked with quick change tool post, so I can't really say anything about it. Even 30 years ago, when I went to trade school, all the manual machines had a 4 way tool post.

What was the part for tha you made ? very good job by the way

Wow, that’s a surprisingly tight tolerance for the diameter.

hello chris, such large parts are still heat treated before finishing? or was the raw material already heat normalized?I could imagine that after roughing, some material stress causes the part to warp! this is a great channel, very interesting! greetings from a mechanic from switzerland 🇨🇭 🙋‍♂️🇨🇭🔧💪🏻

@ChrisMaj

2 жыл бұрын

I'm guessing it was already done before. Surprisingly, it was only moving 0.003" after roughing.

Superb piece of machining sir 👌🏻

FANTASTIC

Cool stuff, how was the stock faced and center drilled? I didnt see a steady band.

@ChrisMaj

2 жыл бұрын

Cut to length on a horizontal boring mill and two plugs, one at each end.

Impressive as usual. Thanks for sharing.

Da darf man keinen Fehler machen! Wenn man so ein großes Teil versaut, dann wird das richtig teuer! - Sehr gut gemacht!

@ChrisMaj

2 жыл бұрын

Boss wäre nicht allzu glücklich.

Great work as always do you have check the run out between centres when machining such a long length

@ChrisMaj

2 жыл бұрын

Made it within 0.001"

+0.000/-0.002 wowzers. Really tight tolerances on something this big.

@ChrisMaj

2 жыл бұрын

It's not always the diameter and the tolerance, but the length that will bite you in the ass.

@ShainAndrews

2 жыл бұрын

@@ChrisMaj That's what she said.

What is the application for a spindle of such size? Guessing steam turbine for electric generation, or something like that. Love the videos!

@ChrisMaj

2 жыл бұрын

Steel mill industry.

@timw4561

2 жыл бұрын

@@ChrisMaj was going to be my 2nd guess. Thanks for the interesting content. Have a great day!

Nice .. im used to watching CEE Australia , like how he explains what he's doing and why and how he measures more than twice he's super accurate....

@ChrisMaj

2 жыл бұрын

Kurtis works for himself so he can do whatever he wants and how long he wants it. I work for someone else and I don't really have time to explain things. Whatever I can get that's what you see. I'm more of a showoff my work channel.

Thought there would be a center support needed to keep it true - long shaft, I guess it doesn't flex?

I used to install,service and repair Hankook lathes, a good strong machine…

@ChrisMaj

2 жыл бұрын

Yeah, I've been running that thing for the past 15+ years without any major problems. We even got the second one last year.

Something Iv learned from machining tight tolerances on LONG shafts with a lot of material to remove, if you don’t rough it, then steady rest it and remachine and reset the Live center you will get runout and taper,Is that what you do? What’s your method. Iv done this to hold .0002 taper and concentricity across a 15 ft 5inch diameter shaft

@ChrisMaj

2 жыл бұрын

I mean, you can tell what's happening with the part after roughing. In my case, there was only 0.003" run-out after roughing, so I finished it using the same centers without any issues. It all depends what material you use, the diameter, the length, and even how ridgit your machine is.

Great video!

very good job chris maj

Amazing work.

I wonder how you deal with the smell of lubricating coolant

Some serious tolerances on a huge shaft

Great job! Thanks for sharing this video of your high quallity work😎 I learn a lot from your videos👍 greets from the netherlands

@ChrisMaj

2 жыл бұрын

It's not really a learning channel, but thanks.

Sir I'm making 2.5 meter long drill line spooler shaft when I put studyrest in half way and complete one side ofter I remove studyrest when my job is spinning runout 0.5 mm I don't have dack chuck

Keeping that bar straight, 6 setups. It has been suggested to never take more than a mil when turned such a bar, would you agree, very small cuts so it doesn't warp.

I believe the extra setups are well worth it. Awesome job.

@ChrisMaj

2 жыл бұрын

Worked for me so far.

@marklowe330

2 жыл бұрын

@@ChrisMaj I always liked to straighten the material before making a shaft but that's impossible with your piece. Machinist and programmer for 30 years. I enjoy watching your videos. Keep em coming.

Wondering why you didn’t use a steady rest..😙 What is this going to be used for? Thank you..

@ChrisMaj

2 жыл бұрын

I'm not getting a chatter and the steady rest that I have only goes up to 9". Steel mill industry.

Thanks for the video Chris. Do you cut threads by increasing cut depth in the Y direction only or do you do it at an angle and cut on only one side of the tool i.e. 30 degrees like you would on a manual lathe with the compound slide?

@ChrisMaj

2 жыл бұрын

Most of the time, I'm using the fanuc guide threading cycle. I think it's called zig zag or something like that. You basically use both sides of your insert.

@user-yv5mt9rm3d

2 жыл бұрын

@@ChrisMaj thanks for your reply. That makes sense. The reason that I asked is that I tried to figure it out myself by looking at the chips coming off and I noticed them coming off from both sides of the cutting edges in different clips, one clip left side, another right side. Then the coolant came on which obscured the view but hey, you've got work to do! So perhaps the Fanuc does something clever to cut alternate sides for a good finish? Either way it looks like you did a great job, thanks for sharing, keep it up

@ChrisMaj

2 жыл бұрын

@@user-yv5mt9rm3d Thanks for taking the time to watch the video.

@kevind1865

2 жыл бұрын

@@user-yv5mt9rm3d Most manufacturers offer the zig-zag for thread cutting. It's usually called "alternating flank infeed" or something like that. Even my early 90's mazak has it.

Hey, that’s the same kind of shit I used to do! ToolMex Tur930. 39”x255” lathe. Biggest diameter I cut was 38.75” 😂

Nieźle panie jest co oglądać I podziwiać 👌👌👌

@ChrisMaj

2 жыл бұрын

No dzięki, dzięki. Staram się ale ciężko jest wszystkim dogodzić.

@exsoldier2012

2 жыл бұрын

@@ChrisMaj masz umiejętności nie ma co ja nie mam gdzie zdobyć takiego doświadczenia Angole nie chcą się dzielić wiedzą

outstanding, new subscriber here from Florida, Paul

@ChrisMaj

2 жыл бұрын

Thanks for taking the time to watch my videos, Chris.

@ypaulbrown

2 жыл бұрын

@@ChrisMaj cheers, Paul

Nice job Chris, had me concerned about cleaning in the middle with not much to come off there!

@ChrisMaj

2 жыл бұрын

That was the first thing I checked. I knew that I got 0.040" stock on the low spot for finish cut. I was just hoping that it won't move on me after roughing.

@captcarlos

2 жыл бұрын

Yeah, that's cutting it too fine on the supplied stock imho.. Especially as the hollow bar set the centre with no fudge factor. It's no wonder you snuck up on the roughing with 5 set ups.. Imagine scrapping that much 4340, that would make me worried. I wonder how straight the bore is now?

@ChrisMaj

2 жыл бұрын

@carl white I'm guessing the bore is pretty straight cause there was only 0.003" runout after roughing. The ID isn't that critical, there's 0.250" clearance between bore and the pull rod that goes through the spindle.

Great job,friend!! 🤘

@ChrisMaj

2 жыл бұрын

Thanks man

That's one chunk of steel. I used to turn rolls for textile machines back in the 60's, some would take the entire shift to make one pass.

@MrKotBonifacy

Жыл бұрын

Yeah, "time flies when yer having fun", innit? ;-)

Nice video chris as always!! Impressive, even tho you have such a long piece with that small diameter you don’t need a steady rest!! That 4340 must be QT and realy hard?

@ChrisMaj

2 жыл бұрын

8.0" isn't really that small. I've done smaller diameters without steady rest. I think it said 320 Brinell on the label.

@Cheeta666

2 жыл бұрын

@@ChrisMaj at my place that is our minimum dia or close (we are a melt shop) and having that kind of lenght at this dia under 275bhn is a pain haha good job!

Nice. Like it. Lots of set ups, but it works. Greetings from Gansbaai engineering, south africa

@ChrisMaj

2 жыл бұрын

It's a big piece, so you can't just go from roughing to finishing.

@freddepauw

2 жыл бұрын

True. But it worked...

I would like to see how you cut the tapers.

@ChrisMaj

2 жыл бұрын

It's a cnc lathe, so no big deal.

Great video and work as usual ☺️💪 The numbers of operations are required for jobs like this, is this type of steel. Allot of tension is released when being machined. How accurate can the lathe do a shaft this size? From one end to the other?

@ChrisMaj

2 жыл бұрын

Probably within 0.002" if it was one straight shaft. Here, you have steps so I can easily do it within 0.001" or sometimes I'll just compensate in the program.

@OmeMachining

2 жыл бұрын

@@ChrisMaj not bad 😁 no that's the benefit of a controlled machine. It's easier to compensate for 'errors'. Some nice chip removal as well 💪 as we like to see

Crazy that lathe will hold that much weight between centers, no steady rest

@ChrisMaj

Жыл бұрын

I've worked on a few different machines in my career, but this has to be the most rigid lathe.

Well you had me worried when the billet said 13" and the print said 13 1/8" major OD at the taper.Did it only clean up on the finish pass?

@ChrisMaj

2 жыл бұрын

Yeah, they might want to get some extra stock next time. There was about 0.040" for finish cut.

@localele1

2 жыл бұрын

@@ChrisMaj Yes that is a bit close after that much machining time if it is a critical dimension.

Hello and Thankyou for sharing. What brand of lathe is that and weres it made?

@ChrisMaj

2 жыл бұрын

Hankook PROTEC-9NC. Made in Korea

Nice one ! Cheers .

On a part like this are you concerned about it drooping in the center from all the weight?

@ChrisMaj

2 жыл бұрын

I never had an issue with that, unless it's long and small diameter, then I would use a steady rest.

@brodyhmachining

2 жыл бұрын

@@ChrisMaj cool, thanks for the reply!

Really nice work have to be very careful not to scrap that pies. Removing such a huge amount of material it would be interesting though to see if Coromant PrimeTurning could give less vibration and even deeper cuts.

@ChrisMaj

2 жыл бұрын

Yeah, you don't get a second chance on parts like this. I've heard that Sandvik Coromant works well with high speeds, which isn't the case here.

how many hrs did it take?

good job

Wow Amazing Huge part worked by a master

@ChrisMaj

2 жыл бұрын

Thanks, I don't know about that master but I'll take it 😉

@yajtramer6913

2 жыл бұрын

@@ChrisMaj I have never worked with large parts like that. Only small parts for me.

I watched a video from cutting edge they cut a piece of steel about this size maybe smaller but couldn’t keep it straight for nothing sent it off to be stressed relieved appeared to help he done the same thing one maybe two cuts then swap it around

@davidpook5778

2 жыл бұрын

I remember that, He said it was bad China material.

@ChrisMaj

2 жыл бұрын

Sometimes it's the material you work with. No matter what you do or how many times you flip it, it will still walk all over you. Here is one example kzread.info/dash/bejne/lm2gx9SJY9zeYKw.html

nice

What is the quality and brand of the insert? nice workmanship

@ChrisMaj

2 жыл бұрын

Roughing insert: Kennametal CNMG644 KC9125 Finishing insert: Korloy TNMG432 NC3030

@TC.arifoner

2 жыл бұрын

Thank you

Nice stuff

Flip, flip, flip, flip, flip, finish

@ChrisMaj

2 жыл бұрын

Haha, yeah, pretty much .

Tuyệt vời quá 👍

Very nice video excellent work thanks for sharing. :o)

@ChrisMaj

2 жыл бұрын

Well, I'm trying 😉 thanks for always watching and the comments.

That's a big piece!

@ChrisMaj

2 жыл бұрын

These are the jobs that I like.

Please tell me your chip conveyor works!

@ChrisMaj

2 жыл бұрын

Sure does.

don't have true boyz why dont using lunette? helps with holding axis straight 2.5 meter is too long to turn without lunette.

looks like a fanuc fabt control in new version

Very nice

why does the bottom of your toolpost, not sit flat. is there a reason for the curves?

@ChrisMaj

2 жыл бұрын

This manually indexed square tool post features curvic coupling. It can be positioned per ever 15 degree increments.

@seantap1415

2 жыл бұрын

@@ChrisMaj that makes sense. Thx for the reply.... cheers

Material is 4340 answer me please i comment in your last 2 videos

Love to see the boring/drilling op

@ChrisMaj

2 жыл бұрын

Unfortunately we don't have the equipment to do that.

Did you have any run out when it was done?

@ChrisMaj

2 жыл бұрын

Within 0.001" . I love 4340 steel, it never moves much on you while machining.

@deltamachine2059

2 жыл бұрын

@@ChrisMaj nice job!!

Profi

wow how it can support without that thing in the middle ( dont know the name )

What is this dark spot on the tool, is it a chip or is it a part that had overheated? Curious...

@ChrisMaj

2 жыл бұрын

Can you put a time stamp on it, cause I'm not sure what you mean.

@batzlat1

2 жыл бұрын

​@@ChrisMaj Oh sure! It's right in the 15th second, where you showcase the tool. It has a discolouration on the cutting edge.

@ChrisMaj

2 жыл бұрын

@@batzlat1 Yeah, that's just a little heat discoloration.

@batzlat1

2 жыл бұрын

@@ChrisMaj Your videos are a pleasure and such a calming experience to watch! Thanks!

@ChrisMaj

2 жыл бұрын

@@batzlat1 Glad you enjoyed. Thanks for watching.

That largest diameter not cleaning up was causing me anxiety on every set up...

@ChrisMaj

2 жыл бұрын

That was a little close for my liking.

yall gonna put fritolays out of business with all those chips

Представляю сколько денег будет потрачено впустую, если случайно запороть эту заготовку.

@ChrisMaj

2 жыл бұрын

Я стараюсь не думать об этом, когда делаю что-то такое большое.

Spent over 40 + years in machine shops and I can tell you hearing all the chatter and hydraulic noise, you will lose your hearing and that's with hearing protection all the time.

@ChrisMaj

9 ай бұрын

Let's just say this job isn't really good for your health overall.

Not sure I understand the insert code ... CNMG I get, 644 ... 64mm cutting edge, 4mm thick? Sounds WAY wrong ... did you mean 1604, 16mm cutting edge, 4mm thick?

@ChrisMaj

2 жыл бұрын

Let me break it down CNMG you got that First #6 size of the insert/ width 0.750" Second #4 thickness of the insert 0.250" Third #4 nose radius of the insert 0.062" Ok, how about this # CNMG190616 does this makes more sense?

@itsverygreen532

2 жыл бұрын

@@ChrisMaj Ah OK, *inches* that makes more sense ... I wasn't aware they made ISO inserts in inch sizes, as they are quite a modern innovation and we stopped using inches 50 years ago. Maybe that explains the odd "423" numbers I see on some older packets of inserts.

Dig_it

0:36 ich vermisse noch die VC angabe bzw spindeldrehzahl (m/min > spindel speed)

@H3ck37chu31ze

2 жыл бұрын

I agree with that. sometimes maj use sfm but but if He add VC this would be great.

how many time does it take?

@ChrisMaj

2 жыл бұрын

To do what?

how long did it take real time?

@ChrisMaj

2 жыл бұрын

Doing one-offs is not like doing production work. You don't get to tweak everything to the second. It took around 20+/- hours. Setup, programming, rough and finish.

При такой длине разве нет прогиба?

yeah OK - I;m guessin' wind turbine or similar.

@ChrisMaj

2 жыл бұрын

Steel mill industry.

Its normal day in my work with this size materials

@ChrisMaj

2 жыл бұрын

W Polsce pracujesz, czy gdzieś zagranicą.

@kolekcjoner_9167

2 жыл бұрын

@@ChrisMaj W Polsce

coolant on...coolant off....

@ChrisMaj

2 жыл бұрын

For video purposes only 😉

talk about a weight lose program, hehehe

@ChrisMaj

2 жыл бұрын

I wish I could lose some weight that fast 😉

Гигант станок гигантский работа. Ок

hư cục này đuổi việc luôn nha

What sfm are u running?

@ChrisMaj

2 жыл бұрын

Around 250

@snowman7672

2 жыл бұрын

@@ChrisMaj thank u sir! That was awesome work you did!

It real bothers me when I see the parts being run without coolant just to show the cutting.

@ChrisMaj

2 жыл бұрын

It's all good 👍