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.
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.
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.
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 😂
@@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 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...
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
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.
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.
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.
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.
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?
@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.
@@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.
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.
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
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 🇨🇭 🙋♂️🇨🇭🔧💪🏻
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 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!
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?
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.
@@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
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.
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
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.
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?
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.
@@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
@@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.
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.
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
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 th-cam.com/video/d9lerP3yx0I/w-d-xo.html
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.
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?
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?
@@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.
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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.
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
Yeah, that makes two of us. I'm doing this every day and still watching machining videos.
@@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.
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.
Thanks a lot. I'm definitely showing this comment to my boss. 😂👍
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 😂
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.
@@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!
Large turning videos are fun to watch, but actually doing the work is even more fun and a little stressful .
@@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!
@Peter Szöke It takes a little bit to get used to.
@@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.
Always good to see videos like this keep them coming 👍👍
Great piece of turning and well filmed thanks for sharing 👍
_Chris, thanks for showing the blueprints!_ 👍
_I always pause the video and study them._ 🧐
Me too!
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??!?
It's always a guessing game.
Fantastische Arbeit. Schaue das immer gerne. Habe ja auch diesen Beruf gelernt.😊
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!!
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.
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
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.
Amazing work like always!
Takie wałeczki to jest moja ulubiona robota.
Very nicely done without a steady rest!
Good to watch ,Thanks for posting.
What was the part for tha you made ? very good job by the way
Superb piece of machining sir 👌🏻
Great video!
FANTASTIC
Impressive as usual. Thanks for sharing.
Wow, that’s a surprisingly tight tolerance for the diameter.
Da darf man keinen Fehler machen! Wenn man so ein großes Teil versaut, dann wird das richtig teuer! - Sehr gut gemacht!
Boss wäre nicht allzu glücklich.
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 ?.
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.
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....
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.
Amazing work.
very good job chris maj
Some serious tolerances on a huge shaft
I used to install,service and repair Hankook lathes, a good strong machine…
Yeah, I've been running that thing for the past 15+ years without any major problems. We even got the second one last year.
Great job,friend!! 🤘
Thanks man
Thought there would be a center support needed to keep it true - long shaft, I guess it doesn't flex?
+0.000/-0.002 wowzers. Really tight tolerances on something this big.
It's not always the diameter and the tolerance, but the length that will bite you in the ass.
@@ChrisMaj That's what she said.
Great job! Thanks for sharing this video of your high quallity work😎 I learn a lot from your videos👍 greets from the netherlands
It's not really a learning channel, but thanks.
Crazy that lathe will hold that much weight between centers, no steady rest
I've worked on a few different machines in my career, but this has to be the most rigid lathe.
outstanding, new subscriber here from Florida, Paul
Thanks for taking the time to watch my videos, Chris.
@@ChrisMaj cheers, Paul
Nice. Like it. Lots of set ups, but it works. Greetings from Gansbaai engineering, south africa
It's a big piece, so you can't just go from roughing to finishing.
True. But it worked...
Hey, that’s the same kind of shit I used to do! ToolMex Tur930. 39”x255” lathe. Biggest diameter I cut was 38.75” 😂
good job
Nice job Chris, had me concerned about cleaning in the middle with not much to come off there!
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.
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?
@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.
Nice stuff
Nice one ! Cheers .
Great work as always do you have check the run out between centres when machining such a long length
Made it within 0.001"
I believe the extra setups are well worth it. Awesome job.
Worked for me so far.
@@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.
What is the application for a spindle of such size? Guessing steam turbine for electric generation, or something like that. Love the videos!
Steel mill industry.
@@ChrisMaj was going to be my 2nd guess. Thanks for the interesting content. Have a great day!
nice
Cool stuff, how was the stock faced and center drilled? I didnt see a steady band.
Cut to length on a horizontal boring mill and two plugs, one at each end.
I would like to see how you cut the tapers.
It's a cnc lathe, so no big deal.
I wonder how you deal with the smell of lubricating coolant
Nieźle panie jest co oglądać I podziwiać 👌👌👌
No dzięki, dzięki. Staram się ale ciężko jest wszystkim dogodzić.
@@ChrisMaj masz umiejętności nie ma co ja nie mam gdzie zdobyć takiego doświadczenia Angole nie chcą się dzielić wiedzą
Very nice video excellent work thanks for sharing. :o)
Well, I'm trying 😉 thanks for always watching and the comments.
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.
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.
Yeah, "time flies when yer having fun", innit? ;-)
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
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 🇨🇭 🙋♂️🇨🇭🔧💪🏻
I'm guessing it was already done before. Surprisingly, it was only moving 0.003" after roughing.
That's a big piece!
These are the jobs that I like.
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?
8.0" isn't really that small. I've done smaller diameters without steady rest. I think it said 320 Brinell on the label.
@@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!
Flip, flip, flip, flip, flip, finish
Haha, yeah, pretty much .
looks like a fanuc fabt control in new version
Wow
Amazing
Huge part worked by a master
Thanks, I don't know about that master but I'll take it 😉
@@ChrisMaj I have never worked with large parts like that. Only small parts for me.
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?
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.
@@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
Very nice
Tuyệt vời quá 👍
how many hrs did it take?
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.
Let's just say this job isn't really good for your health overall.
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
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.
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?
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.
@@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
@@user-yv5mt9rm3d Thanks for taking the time to watch the video.
@@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.
Wondering why you didn’t use a steady rest..😙 What is this going to be used for? Thank you..
I'm not getting a chatter and the steady rest that I have only goes up to 9". Steel mill industry.
What is the quality and brand of the insert? nice workmanship
Roughing insert: Kennametal CNMG644 KC9125
Finishing insert: Korloy TNMG432 NC3030
Thank you
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.
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.
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?
Yeah, they might want to get some extra stock next time. There was about 0.040" for finish cut.
@@ChrisMaj Yes that is a bit close after that much machining time if it is a critical dimension.
Love to see the boring/drilling op
Unfortunately we don't have the equipment to do that.
Hello and Thankyou for sharing. What brand of lathe is that and weres it made?
Hankook PROTEC-9NC. Made in Korea
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
I remember that, He said it was bad China material.
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 th-cam.com/video/d9lerP3yx0I/w-d-xo.html
On a part like this are you concerned about it drooping in the center from all the weight?
I never had an issue with that, unless it's long and small diameter, then I would use a steady rest.
@@ChrisMaj cool, thanks for the reply!
yall gonna put fritolays out of business with all those chips
don't have true boyz why dont using lunette? helps with holding axis straight 2.5 meter is too long to turn without lunette.
wow how it can support without that thing in the middle ( dont know the name )
Profi
Please tell me your chip conveyor works!
Sure does.
Material is 4340 answer me please i comment in your last 2 videos
why does the bottom of your toolpost, not sit flat. is there a reason for the curves?
This manually indexed square tool post features curvic coupling. It can be positioned per ever 15 degree increments.
@@ChrisMaj that makes sense. Thx for the reply.... cheers
Dig_it
Did you have any run out when it was done?
Within 0.001" . I love 4340 steel, it never moves much on you while machining.
@@ChrisMaj nice job!!
yeah OK - I;m guessin' wind turbine or similar.
Steel mill industry.
What is this dark spot on the tool, is it a chip or is it a part that had overheated? Curious...
Can you put a time stamp on it, cause I'm not sure what you mean.
@@ChrisMaj Oh sure! It's right in the 15th second, where you showcase the tool. It has a discolouration on the cutting edge.
@@batzlat1 Yeah, that's just a little heat discoloration.
@@ChrisMaj Your videos are a pleasure and such a calming experience to watch! Thanks!
@@batzlat1 Glad you enjoyed. Thanks for watching.
how many time does it take?
To do what?
Представляю сколько денег будет потрачено впустую, если случайно запороть эту заготовку.
Я стараюсь не думать об этом, когда делаю что-то такое большое.
При такой длине разве нет прогиба?
0:36 ich vermisse noch die VC angabe bzw spindeldrehzahl (m/min > spindel speed)
I agree with that. sometimes maj use sfm but but if He add VC this would be great.
how long did it take real time?
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.
talk about a weight lose program, hehehe
I wish I could lose some weight that fast 😉
coolant on...coolant off....
For video purposes only 😉
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?
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?
@@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.
That largest diameter not cleaning up was causing me anxiety on every set up...
That was a little close for my liking.
Гигант станок гигантский работа. Ок
Its normal day in my work with this size materials
W Polsce pracujesz, czy gdzieś zagranicą.
@@ChrisMaj W Polsce
hư cục này đuổi việc luôn nha
What sfm are u running?
Around 250
@@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.
It's all good 👍