Roll Shaft | New Thread Gage 2"-4½ L.H. | CNC Machining

[@marciomusto9264]

Duas paixões para mim, usinagem e guitarra no final para fechar com chave de ouro.Parabens pelo canal,show!!

[@shawnhuk]

Loved the “oops, that’s a left hand thread” slight of hand lol.

[@ChrisMaj]

Habit, before the brain catches on, it's L.H. thread 😅

[@forrestaddy9644]

You do nice work, Chris. Efficient, ordered, accurate, consistent, and, in effect, esthetically pleasing to those with the eye to appreciate such things.

[@johnlawler1626]

Turned out well, thanks for sharing 👍

[@rescobar8572]

You make this look SO EASY! Great job and video from a dam Great machinist! Thanks for sharing 👍

[@ChrisMaj]

Glad you enjoyed it.

[@rescobar8572]

@@ChrisMaj I learn from them. Thank you for sharing your techniques!

[@captcarlos]

Nice job Chris. I miss CNC threading. Although, it's more exciting to do internal left hand threads on a manual lathe!

[@BruceBoschek]

Bravo! Beautiful work with a big, blind, left-hand threaded hole. Great job, Chris.

[@ChrisMaj]

You just have to trust yourself that you entered the numbers correctly and hit that start button. 😅

[@schlaznger8049]

Your machine handles some heavy cut's. Nice job!

[@paulrash2886]

Top Hand Quality Work Chris.

[@ChrisMaj]

Thanks 👍

[@warrenjones744]

I am pretty sure I have said this in the past, You and your company make some pretty interesting big parts.

[@ChrisMaj]

I appreciate that!👍

[@zoltannagy1813]

Beautiful work Chris. That left hand blind hole thread would have scared the shit out of me (on a manual lathe)

[@mikeb1520]

Why? I thread internal right hand threads that way all the time, threading away from the chuck is a piece of cake on a manual lathe.

[@ChrisMaj]

I've always found it easier threading blind holes inside out, especially small diameters, where you can't really see anything. Honestly I'm surprised this isn't done more often, especially on manual machines without a kick out. Machining to a shoulder can be intimidating and exhausting for even the saltiest shop dog, all their bravado asidely. (Yes, I've done plenty of manual machining before youtube and cell phones 😅)

[@joseamerico2612]

Beautiful work, Chris 👌👌🇧🇷🇧🇷🇧🇷

[@ChrisMaj]

Thank you so much 😀

[@theessexhunter1305]

That thread was a dogs nuts of a fit Chris.

[@ChrisMaj]

😅 thanks.

[@chienmt2910]

Perfect ❤

[@parnuzutech]

good job you are awesome friends 👍

[@CncFrezar]

An interesting preparation for falling chips👍😃

[@ChrisMaj]

Makes clean up a lot easier 😅

[@CraigLYoung]

Thanks for sharing 👍

[@ChrisMaj]

Thanks for watching

[@currentbatches6205]

5:55 - How are the 'cushions' fastened to the jaws? 7:53 - Very nice surfaces! 9:25 - Was watching Kurtis face ~8" stock on his fixed-speed lathe. He's good, but there is no way to get a consistent surface finish all the way to the C/L. 12:11 - Doesn't it worry you a bit when the chips are so unequal? 13:25 - Once turned a blind internal thread in a face-plate for a little-bitty Jet lathe I had at the time, R.H! Sweated bullets the entire time, but also had the sense to make a thread gauge first. As always, quality work. Fun to watch a pro at work.

[@ChrisMaj]

5:55 aluminum shims held by jaw pressure. 7:53 it turned out alright. 9:25 constant surface speed makes everything look better 11:29 Oooo come on, they look almost identical on both sides of the drill 😅, unless you're talking about something else. Internal threading is pretty straightforward using cnc. Just make sure you got your tool length and your numbers right before hitting that cycle start button.

[@currentbatches6205]

@@ChrisMaj "Internal threading is pretty straightforward using cnc. Just make sure you got your tool length and your numbers right before hitting that cycle start button." The rest of us sweat bullets; good job.

[@hansweeyee9134]

​@@ChrisMaj Chris how is a shaft indicated in the steady rest?

[@josefanhani1270]

Tenho muitas saudades dos meus tempos de torneiro mecânico,estou com 71 anos mais ainda sei trabalhar.

[@marcioroberto7423]

A VOCAÇÃO ESTAS NO SANGUE, QUANDO GOSTAMOS DE ALGO, FAZEMOS COM MAESTRIA , ISSO NAO SE ESQUECE JAMAIS...

[@juliusmilo5959]

Vymakané...Nice...

[@user-po5tv8uu7w]

대한민국 한국기계공작하고 똑한네요? 한국기계 잘했습니다. 기술전수해 주고 쫑나고 돌아왔네요 .참 잘했습니다.

[@Spikeydelic]

LOOOOOL @11:20 I actually felt phantom vibrations in my feet as ther big drill went in.. Am i brainwashed by my job? :D again.. your videos are amazing!

[@truegret7778]

Beautiful precision work, Chris. On the long run, do you have to change inserts to hold the 6.500"/6.498" diameter? You really do amazing work. Very hypnotic and impressive. Thank you.

[@ChrisMaj]

Usually, one insert corner will last for the entire piece, well, most of the time.

[@SR-ml4dn]

Superior craftsmanship, like the runout was zero, not easy to do.

[@D08048]

👍👍👍🤝

[@lumpyfix8124]

Thats purdy

[@jimsvideos7201]

As threads go, that left-hand one is the strangest I've ever heard of.

[@TheMetalButcher]

Standard UNC pitch.

[@ChrisMaj]

Our minds are not used to left-hand threads, I guess .

[@ehamster]

Have you heard from Dave Wilkes? (UK trepanning guy). Haven’t heard from him for a while. Hope he’s OK

[@ChrisMaj]

No, nothing. He didn't post anything for about 2 years now, but I saw his comment on Titans a while ago, so I guess he's alright. I did ask him how is he, but he didn't reply back.

[@adam-1112]

Przyznaj, że lekki stresik był 12:58 😅😅

[@ChrisMaj]

Głębokość była sprawdzona bez obrotów przed wciśnięciem zielonego guzika 😅

[@markanthonysmith413]

Great video Chris, for a job like that how long does it take start to finish, Regards Mark

[@ChrisMaj]

It's a little different for production work and one-offs. Us being a repair machine shop, sometimes I'll start a job then take it out cause something urgent comes in. I have to setup everything, write the program, and finish the work. Making just one piece always takes a little longer cause you have to check the program as you go.

[@christianfeldmann8287]

What Brand are the Inserat? Nice Chip flow!

[@ChrisMaj]

Roughing- Kennametal, finishing- Korloy, threading- Iscar.

[@chatnik78]

Hast du vor dem linken Innengewinde einen Freistich am Anfang gemacht oder nicht? Weil du ansonsten mit der Gewindebohrstange immer ins Volle gestochen hättest. Deine Videos sind wie immer eine Freude 👍😉

[@ChrisMaj]

Ja, es gibt einen Hinterschnitt auf der Rückseite, nur um es dem Gewindewerkzeug etwas leichter zu machen.

[@kevind1865]

Does the lathe have a ball screw for X and Z or does it use (edit) a lead screw or helical rack with scales and backlash compensation?

[@ikbendusan]

ballscrews, of the ground variant

[@ChrisMaj]

High precision ball screws for both axes.

[@eviethekiwi7178]

do you drill by hand with the wheel on the tailstock? or do you lock it to the carriage and run it as a cycle?

[@ChrisMaj]

If I'm doing only one piece, I'll go by hand. If I'm doing more parts, then I'll use my toolpost attachment .

[@russmgd]

What brand and model lathe is that? Nice work.

[@ChrisMaj]

Hankook PROTEC-9NC

[@pulsenpal7882]

do you also use full profile thread inserts?

[@ChrisMaj]

No, never. I like these much more. I can do any thread, any pitch with the same insert.

[@antwanski88]

Honest question. A shaft that long, what was the first operation. How did you put the center in. Did you have to use a different machine before setting it up in the cnc lathe?

[@ChrisMaj]

The centers were done on a horizontal boring mill, and the rest is in the video.

[@antwanski88]

I figured that was how you started the shaft. I run a doosan 5100lmb that does not have a steady rest, yet. I've had to use a manual lathe for the centers or a boring mill. Thanks for the answer!

[@mattpinto2351]

How much stock do you leave before the finishing pass on the tight tolerances?

[@ChrisMaj]

Most of the time, I'll leave 0.100" (2.54 mm) on diameter. On tight tolerances, I always take two cuts. First, just to make sure I'm not getting any taper, and then I'll do the final cut.

[@mattpinto2351]

@@ChrisMaj you are a master at your craft, and I appreciate your response

[@Michal_Sobierajski]

Nóż z płytką przekrzywiasz z jakiej przyczyny? Dla lepszej powierzchni?

[@ChrisMaj]

Tak jak mowisz, przy toczeniu czołowym od mniejszej średnicy do większej wychodzi lepsza powierzchnia.

[@Michal_Sobierajski]

@@ChrisMaj tam oczywiście miało być "z płytką T" ale nie wiem dlaczego nie było 🤷🏻‍♂️

[@elanjacobs1]

No FIX8 this time?

[@ChrisMaj]

That's only for BIG JOBS 😉

[@TL....]

wow krzychu nie zle zdrowko

[@ChrisMaj]

Dzięki, "zdrówko "w poście, no wiesz co 😅😉

[@taimoorulhassan1720]

Which software you use for programming

[@ChrisMaj]

Fanuc manual guide (conversational programming)

[@user-po5tv8uu7w]

대한민국이 왜이렇게 된는가 설없다.

[@migueljosemartinez6734]

What kind of insert use for thread?

[@ChrisMaj]

Iscar TIP 5MT-0.25 IC908

[@MrKotBonifacy]

WARNING: this is a random auto-generated comment meant only to bless YT algorithm. DO NOT READ IT. ;-)

[@ChrisMaj]

Bad bot. 😅 YT algorithm is really messed up, I'll tell you that much.