SPUR PINION SHAFT/ WAŁEK ZĘBATY, CNC LATHE

[@jerryk8965]

I have been a machinist for almost 25 years, if I had a dollar for every drawing that said "HOT" on it I would not have to be a machinist anymore. 😀

[@ChrisMaj]

Yeah I hear you, everything is always "HOT" "ASAP" and then it sits on the floor for a week.

[@kisspeteristvan]

@@ChrisMaj damn that's so true it hurts .

[@dontfeelcold]

As long as you charge appropriately, it's all good.

[@howajo]

"Your failure to plan does not constitute an emergency on my part."

[@MrKotBonifacy]

@@ChrisMaj Aw, such a big boy and still hasn't learned... 1. HOT items must cool down first before they can be picked - and too quick cooling may warp them, and 2. ASAP never actually specifies any "specific" date, does it? "You make it as soon as possible, and I'll pick it... ASAP too". ;-)

[@kugelsicher5721]

Love watching those short blue chips coming off of the workpiece! Absorbing huge amounts of energy and taking it away. Perfect MMR! Really enjoy your videos Chris. Always love seeing a master craftsman at work! God bless!

[@grumpyg9350]

Just wonderful. So much fun to watch.👍👍👍👍👍👍👏🏻👏🏻👏🏻👏🏻 great programming and finish.

[@BruceBoschek]

Your videos are so instructive and entertaining. I'm going back and watching some of the older ones. Thanks so much!

[@ChrisMaj]

Haha, I don't know if I would call my videos instructive, but thank you. It's more of a showoff my work channel.

[@userwl2850]

Truly amazing work. The sound of the motor loading up and down is music. Amazing you do all those big cuts with the CNMG tool with no pulling in.

[@jimsvideos7201]

Thank you for including some basic dimensions; I appreciate having a sense of scale.

[@jimmurphy6095]

I'm amazed at just how quiet and smooth it runs as it's tearing out 4140 at speed... I too wish we could see the teeth hobbing process. Thanks for this upload!

[@bostedtap8399]

Excellent machining, no rubbing in sight 👍. Thanks for sharing and stay safe all.

[@gwharton68]

Beautifully done as usual. Just the part I need for my bicycle.

[@hasanusman9809]

Good finishing work.Good insert.

[@TheRunner1996]

Awesome to see, thanks for sharing.

[@richardhead8264]

_Chris, I really enjoyed seeing the print at _*_9:59_**_,_*_ and then seeing your calculator at _*_10:48_*_ for achieving the specified Ra. Thanks for showing that!_ 👍 _I am curious why the engineer specified a coarser 32 finish on the 6.301/6.302 journal, as compared to a finer 8/16 finish on the 6.998/7.002 journal._ _Seems like the finer finish should go with the tighter tolerance, and vise versa. _*_Any thoughts?_* 🤔

[@ChrisMaj]

Bearing goes on the 6.301/6.302 (32 fin). Seal/gasket goes on 6.998/7.002 that's why the 8/16 finish.

[@richardhead8264]

@@ChrisMaj _Thank you for the explanation! It all makes sense to me now._ 👍

[@Michaelsloncehammr]

The rough finish will crush slightly and provide a rigid mating with the bearing.

[@garyteano3026]

Great job! Love the blue chips!

[@michaelkoch2109]

Einfach nur wunderschön anzuschauen! Sehr gute Arbei!

[@alparjuttner9095]

Very interesting, as always. Will the tooth profiles also be finished at the end?

[@nikolaiownz]

Beautiful work mate

[@filippevinne8467]

Piekne wiory Panie Krzychu. Idealne... Znowu... :) Jak dlugo to trwalo? Glownie zgrobna obrobka mnie ciekawi w tym wypadku. PS. Wielkie bylo moje zdziwienie jak w ktoryms filmie napisal Pan po polsku :) bodajze: "jak sie niema co sie lubi to sie lubi co sie ma"... milo uslyszec :)

[@ChrisMaj]

O kurde, tego to już nie pamiętam. To było jakieś 2 lata temu. Jak narazie jakoś nie mogę się przebić do polskiej publiczności.

[@filippevinne8467]

Its Ok. I'm still catching up with your previous movies and... I'm so thankful about that "tricks/solutions I've learned only because You have time and "smile" for recording that to us... Dont worry, not every one is worth seeing you channel, especially in PL. Sorry, maybe today I'm despairing at the behavior of people around me.

[@rishiemansingh2276]

Excellent job. Just fantastic. Can you please show us the part with the teeth milling, also how hard the part got after heat treatment.?

[@ChrisMaj]

We didn't cut the teeth.

[@Michaelsloncehammr]

Did you have a undercut. Seen your tool hanging out.

[@davidgretlein9384]

Around 14:00 mark - terrible chip breaking ….. what happened?

[@jaredjohnson3043]

Another great video! Do you have a video of machining the teeth?

[@ChrisMaj]

Unfortunately I don't. This was done for a gear company and they always machine the gears.

[@rishiemansingh2276]

OK.. Thank you

[@paulbennett6379]

Good job Chris what Rockwell hardness is it

[@tomlayne5842]

Looks like some Letorneau jacking system parts?

[@jasonbell5905]

How many hours of cutting do you estimate?

[@skorbeunblak3616]

Good😘😘

[@ramonching7772]

That's a lot of chips! How many cubic inches was initially removed? How many minutes?

[@alejandrozurawlow3341]

Exelente!!!!

[@williamlee7371]

Is this shaft carburized during heat treatment? I wouldn't have thought you'll be able to turn anything over 50HRc with anything other than CBN inserts.

[@ChrisMaj]

No, just heat treatment.

[@lepeejon2955]

To bad we didn't get to the gear teeth being cut. Still a great video.

[@HH-Machining]

That lathe has some serious power! Really nice machine ;) Do you cut the gears also? How hard was it after heat treatment?

[@ChrisMaj]

We didn't cut the teeth and it wasn't really hard after HT. I think it was more of a stress relief.

[@joshs7809]

Do you create he centres first and although there’s a risk of both no being completely true with each other?

[@jefflindsey9589]

What from hell material are those bits. Sorry! Dumb question.. I’m not a machinist...

[@Michaelsloncehammr]

That’s a tell. When you call them bits. Your not a machinist. Those are carbide inserts. 60 degree trigon.

[@jmjm1920]

Awesome work brother with powerful machine! 👌👍 what brand machine you using and control 🙏

[@ChrisMaj]

Hankook Protec 9-NC, FANUC control.

[@theessexhunter1305]

How much does a part that size move around after HT? The weight is just staggering as it doesn't look that big.

[@ChrisMaj]

There was only 0.006" runout after HT.

[@wings808]

why the center in the spindle side?

[@broomfieldlaboratories8413]

Hey Chris, How do you like the Hankook lathe? I am looking at a 7NA model.

[@ChrisMaj]

We got this Lathe brand new about 14 years ago and I really like it. We haven't had any major problems so far. We also bought the Protec 7NA model last year, but I haven't worked on it much but it seems like a decent machine. Here is a little video of that 7NA running. kzbin.info/www/bejne/r52npHuEnKyjebM

[@funwitharobot]

Not enough smoke! where’s the molly D....

[@christianfeldmann8287]

pleas-more-videos

[@emrfixit]

Hey! what about the teeth???

[@ChrisMaj]

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

[@michajasina7418]

Jakaś nieoczekiwana blokada systemu brak filmu co.....?

[@ionvasile1533]

Cojonudo.tio.eres.bueno.en.esto😃🖐👍🇪🇦🇷🇴👏

[@arturovargasc]

Really a nice video! Which software for programming do you use?

[@ChrisMaj]

It's all done with a FANUC manual guide

[@jordanwalsh7773]

What's your maximum RPM on this lathe?

[@ChrisMaj]

Max 630 RPM ,but at that speed it sounds like a helicopter.

[@elanjacobs1]

@@ChrisMaj 630 max? Damn.... I'm so used to small stuff, our sliding head lathes top out at 10,000rpm but max diameter is 20mm :P

[@ChrisMaj]

@@elanjacobs1 Diameter of that chuck is 31.5" (800mm) so it makes a lot of noise.

[@michajasina7418]

No i pocisnoles fajne i coś innego niż wszystko co do tej pory ten material niema tendencji do paczenia po azotowaniu i po obrobce cieplnej (zegarek ci się popsuł że tryba dorabiasz )firma zleca na zewnątrz obróbkę cieplną czy sama to robi ,ale frezowania zębów nie pokazales nic straconego pozdro ......

[@ChrisMaj]

Wszystko co idzie do pieca to wysyłamy. Ta robota była dla firmy co zajmuje się tylko nacinaniem przeróżnych kół zębatych i trybów tak że oni sami to robili.

[@Michaelsloncehammr]

Blue chip stocks. 🪄🔮