'Slow as continental drift' comment was spot on!! Continental drift = 3 cm /year or 3.5 μ /hour

50 minutes! I'm strapped in and ready, love these long format videos.

Excellent video Stefan. I plan to put that CBN repurposing to use. for the kind of work job shops do it seems like a must know. Especially with the cost of new . Thanks and thumbs up

Doubt if this is something I would ever use, yet interesting to know one can do it. Please thank your client for allowing you to share your work!

Not a machinist (lowly wood world) but gosh its mind blowing the tool cuts with the edge break. I would have thought that would have blunted the tool instantly. That was super cool. I too am a fan of the long format (though I shouldnt spend so much time on youtube). Really cool video all around. So much learning even from a wood perspective.

Stef, thanks for investing your time in these wonderfully educational videos.

Now I have two great sayings from you: "looks like it was cut with a dull beaver" and "slow as continental drift" :D

I clicked on this channel by mistake I started watching waiting for the show to start to see what I clicked on but this started and I was hooked right from go so I watched all the way through and I am so glad I did it’s amazing how a simple wrong touch of a finger can result in such an awesome outcome thanks for the video I can’t wait to see some more of your channel

Most excellent techniques to have in the home machinist toolbox👍 I really enjoyed the longer video also👌👊🏻 Thanks for your efforts💯

Interesting how you narrow down the possibilities to get the fit you want. Maintaining control all the time.Next time I do anything' I'll reflect back to this lesson

Best part about hard turning is the finish!, Hard interrupted cuts suck almost as much as hard tapping for tooling life.

The time before I asked for more advanced machining lessons, and I got a 50min super class. Thanks Stefan!

Right up my alley. I built an automated, multi stage, hydraulic swaging press this year that used belleville washers as force gauge/regulators on each station. I thought I was so clever but I guess there is nothing new under the sun. They pack a lot of force into a very small space. The CBN information is really useful, thanks.

Thank you for a great video, Stefan, your channel, in my opinion, is definitely the number One machinist and tool making channel on KZfaq Thanks for all that you do.

"Oh, that's very elegant..." 🤣🤣 Steffen you are the best!

Stephen Incredible video is just when you think you were done with purchasing more equipment Here Comes one of your videos and I throw everything out the window also that comment on Continental Drift was hilarious great video great information thank you

Hi Stefan, Great video. The the idea of running CNB at high speeds is to cause enough heat before the tip to anneal the surface a little. We run at 500 sfm most of the time but we run the feed rate slower than recommended to achieve a better finish. We have had great success using CBN and love it. Steve

Always a fantastic learning experience watching your videos mate, thanks for sharing!

Thanks Stefan, that was very informative not to mention enjoyable.

Man this is sophisticated,high quality stuff atleast for me.Thankyou.

I guess I missed a couple of Robin's videos , I really find this helpful thank you Stefan.

Beautifully educational and very entertaining, thanks Stefan!

Thanks for the video Stefan, very interesting content! Can't wait for your promised video about drilling tiny holes, really excited to learn something new!

Amazing as always Stefan

Way better watching than the tv, you should change the channel name to perfect precision on the cheap.

Excellent video and great information! Thank you for keeping your videos about machining and not restorations, travel and general BS like so many others have gone to.

I live your idea for making the needle hole lap ! thank you so much for all the videos

Love your way of precisely working to the necessary dimensions 💚💚

Wonderful video - fascinating content and techniques plus great filming.

Thanks for the lesson! Watched every minute.

Totally fascinating from start to finish, thank you!

As always a fascinating video Stefan - love the precision you can achieve with simple tools regards Sarah

Typical continental drift speed is apparently (0.018 to 0.18) microns/min (microns per minute)

I'm really enjoying your videos lately Stefen. Your humor and personality are coming through so much more than your early videos!

many thanks for the demo Stefan!

I loved the hell out of this video. I discovered CBN and Cermet inserts recently and am getting somewhat obsessed with them. This just pushed me over the edge. I accidentally trashed a CCMT CBN insert and am about to order some diamond wheels now that I know I can touch them up and get more use. Awesome vid Gottes!!

Another fascinating video! Thanks Stefan. I took note of your tip in an earlier video of sharpening carbide inserts using a diamond hone - I'd given up trying to use them on my small lathe, but now they cut like a dream! Cheers :)

wow that"s great work and great knowledge flying around on this video. low tech, high skills. thanks for sharing.

Great video! Been watching the last three years of your episodes and great quality, good teacher. Thanks for sharing the knowledge. btw your German has only improved. Thank you Stefan.

Great video sir! This level of turning is way beyond my old Atlas lathe! I'm just proud to now know what CBN is.

GREAT VIDEO! I like your meticulous nature and knowledge Stefan, wish I had these abilities.

Love your videos... One small comment - you have a 23sec lag at around 13:07. One request too: Would you PLEASE (with lot's of way oil...) consider making a video(s) on your point of view of (comparing) different lathes and/or mills for the home machinist that wants good to high accuracy vs. budget?

Thanks, Stefan! Saw the 50 minute video and new I was about to learn me stuff😁. I like your method for doing specific chamfers. Definitely a great plan for a mass production like job. I haven't even turned anything with carbide yet and you drop the cbn bomb! 🤣 Thanks for the video, it was very educational and elegant 😁.

Soooo much knowledge in that german head. Thank you for sharing with us. Great Video.

Awesome video. Thanks for Sharing your knowledge, Stefan. I always pick up techniques and methods to incorporate into my watchmaking workshop. Cheers, Reuben

As always, thanks for the lessons !

Excellent precision video Stefan. May your Atoms never be at rest🤔

Very interesting Stefan. Great video!

Another great video. Thanks. I learned a lot that I can put to use.

C-B-N,C-B-N! Thank you Stefan, really appreciate you sharing your tricks on the dark art of cbn tooling. Even just sharing the angles you grind to saves the rest of us many, many hours of trial and error. I can stop holding my breath for this video now. Cheers Jaime Moneyvsmachines

I am always throughly amused, when you amuse yourself. Loved the elegant comment, story of my life. Have a good weekend.

G’day Stefan, very interesting, thanks for sharing. Cheers Peter

As always awesome educational video 👍 Thank You for sharing.

Good stuff as always Stefan. People on You Tube seldom talk about a cutting edge chamfer on tools. They usually talk about getting them honed sharp. I chamfer regular brazed C-6 Carbide tool bits to rough out welded bores that always have interruptions doing construction equipment repair using my portable boring bar. It helps to keep them from shattering. The construction of your CBN tools was very interesting. Cheers

Ugly tooling that works really well tends to develop it's own special beauty.

Very informative as usual! Another great source for carbide is in carbide circular saw blades. I was lucky and found a box of new various Sandvik Coromant CBN inserts at a local flea market of all places 👍

FWIW, you had it right the first time. "Tan-Jent". The "G" makes the same sound as the "J" in "Just".

Excellent as always :)

I love the long format and at 26:00 I have no idea how you resisted the urge to put your finger over one end and pull the pin to make the ever so satisfying 'POP' as the pin comes out! I have convinced myself that while you didn't do it on camera, you did do it nevertheless! :) A+ content!

Inspiring, as always. Your craftsmanship is second to none.

Very interesting Stefan.

Oh loved it as always... Keep em comming

Beautiful work. I wish I could do that kind of work.

thanks for the valuable information you share. good filming work also

Nice work Bud!

Thank you, very interesting and precision as per normal for you

The ones from McMaster are "Needle Eye Laps" made by Acro Tool & Die Works. They come in packs of 12, with the expander tool.

haven't watched till the end, but the talk about ceramic lapping discs got me thinking - turn an aluminum blank, load it up with diamond slurry/paste, anodize it (perhaps hard anodize), hope that the diamonds don't fall off while the anodizing is forming - and one just might end up with a usable ceramic/diamond lapping wheel, normal room temperature anodizing I do every day at my shop, but hard anodizing would be trickier and time consuming to set up, but I've done it before, just need to find time for a project like this, that is the biggest problem...

Good Stuff Stefan, enjoyed! ATB, Robin

When Stefan says "It's good enough", it must be good enough for the rest of Mankind.

another great video

Nice work and demos of the cbn.

Stefan Gotteswinter for the mechanical Arts, Rick Beato for the musical Arts and Peter Stanton from Edge Precision for the CNC-Arts are Guys at the top of their Game. It is a REAL Pleasure to watch those Masters of their crafts and learn tons from them....looove it.

good stuff Steff

Excellent. Now i'm off to find some CBN.

Great video

Thank you! Great tips on lapping! :)

Far out you are a very clever man

Great info thanks for sharing

good work!

Great topic 👍 thanks.

"... at least that's what the guy from the nitriding place told me" 🤣 Great video as always buddy! I'll be doing some more lapping in an upcoming video, I might need you to cast some more disapproval 🙂

Very informative video 👍👍

Nice video Stefan ! I like the real life approach. There is this Pakistanian guy in Frankfurt flea market who sells all sorts of inserts. I have bought a few boxes of unused CBN inserts with a VERY decent prise. He calls those "Diamond" :) I think he is still there every saturday and if You are lucky enough to live near Frankfurt ...

Awesome episode. Love your teachings

Thanks as always!

Thanks for the video.

Stefan i use the same methods as you do i make bullets useing the swedging process interesting work .🎯😁

Those tooling marks on the bored parts look quite deep. Is that an illusion because the material is so reflective? Are the marks actually just a couple of microns? I'm ecstatic if I can get within a thou! I think this is one of your best videos ever. So much knowledge packed in. This is a subject that most of us hobby guys have no families with.

Frohe Weihnachten und ein gutes gesundes neues Jahr auch für Dich;0))))))

Thanks 😊 Very much enjoyed

tony!!? hey old tony!! You see this.. its very nice..

ther's alot to learn here!

Super Video👍 wieder viel Neues gelernt 😀 Gruß Robin

A very informative video Stefan.

Thanks stefan

Elegant!

I want to see that dial-a-degree chamfer tool. That sounds profoundly interesting.

This has to be one of my favorite videos of yours.....I think I've watched it 10 times.....for the brass lap did you drill and tap for the set screw a little undersized to get it to expand or does it just expand a little naturally. And do you have any recommendations on where to find a small torch like that?

My grandfather was showing me how to get cbn inserts off with mapp gas but unfortunately he passed away before it got hot enough