Hardened bushings
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- Опубликовано: 27 июл 2019
- Talking about turning and boring hardened steel with CBN, making your own custom CBN tools and small diameter lapping.
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gtwr.de/
Instagram:
/ stefan_gtwr
#practitioner_of_the_mechanical_arts 
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'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.
I hope it does not dissapoint. I tried to condense the content down as far as possible, but I still end up with those stupid long videos ;)
@@StefanGotteswinter You done good.
@@StefanGotteswinter there is nothing stupid about your video's Stefan. You have a great talent editing your video's. You always get all the important information in there without any filler. I can't even thank you enough for the skills that you have tought me. Plus it is just enjoyable to watch your videos you have such a great personality. Andy
I hate short videos, just when things get interesting they end, not to be cheeky Stefan but ii always listen to your pronunciation of "wise" instead of "vise" and i am noticing your getting better
You can say that over and over about Stefan's videos. I mean, whenever I try to have a quick glimpse at them, I always end up watching them a-z, if not even re-watch, in some parts just to make sure I've got it. His vids are as bemusing as their contents are.
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!
Now I have two great sayings from you: "looks like it was cut with a dull beaver" and "slow as continental drift" :D
Stef, thanks for investing your time in these wonderfully educational videos.
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.
Mark ... google "negative rake cutting" for a complete explanation... the tool does not actually cut on the "edge" but inland... completely unintuitive !!!
😎👍☘️
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
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
"Oh, that's very elegant..." 🤣🤣 Steffen you are the best!
😂😂😂😂concur
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.
The time before I asked for more advanced machining lessons, and I got a 50min super class. Thanks Stefan!
Most excellent techniques to have in the home machinist toolbox👍 I really enjoyed the longer video also👌👊🏻 Thanks for your efforts💯
Thank you for a great video, Stefan, your channel, in my opinion, is definitely the number One machinist and tool making channel on RUclips
Thanks for all that you do.
Amazing as always Stefan
When Stefan says "It's good enough", it must be good enough for the rest of Mankind.
many thanks for the demo Stefan!
Always a fantastic learning experience watching your videos mate, thanks for sharing!
Ugly tooling that works really well tends to develop it's own special beauty.
Beautifully educational and very entertaining, thanks Stefan!
Thanks for the lesson! Watched every minute.
Thanks Stefan, that was very informative not to mention enjoyable.
Love your way of precisely working to the necessary dimensions 💚💚
As always, thanks for the lessons !
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
Man this is sophisticated,high quality stuff atleast for me.Thankyou.
I live your idea for making the needle hole lap ! thank you so much for all the videos
Wonderful video - fascinating content and techniques plus great filming.
I guess I missed a couple of Robin's videos , I really find this helpful thank you Stefan.
He posts a bunch of 1 minute videos a week on instagram that are packed with knowledge :)
I'm really enjoying your videos lately Stefen. Your humor and personality are coming through so much more than your early videos!
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!
Best part about hard turning is the finish!, Hard interrupted cuts suck almost as much as hard tapping for tooling life.
Hard-Handtapping! Thats the worst ;)
Agree on the finish by hardturning, its insane. Sometimes nicer than ground.
Very interesting Stefan. Great video!
Totally fascinating from start to finish, thank you!
Yes it is.
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
Typical continental drift speed is apparently (0.018 to 0.18) microns/min (microns per minute)
Thats suprisingly fast :o
So if you have the good fortune (?) of having a workshop on a fault line, you can attach your lathe bed to one tectonic plate, your carriage to the other plate, and hey! free carriage feed! ...with the occasional, unpredictable roughing operation!
If you take the median of 0.018-0.180 μm/min, you get 0.090 μm/min, which is 47 mm/yr (4.7 cm/yr). With your range, of 0.018-0.180 μm/min, it's 9.5 mm/yr to 94.5 mm/yr.
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
You are in for a major treat if you go through all of his postings.
@@chattonlad9382 you failed to mention that a few month from now Barnez44 will buy a lathe... a mill and a lot off cool stuff ;-)
You should definitely take a look at his older videos. He has so much incredible content.
Been watching from the beginning. Consistent good tips. I have learned a lot from this channel.
Great video sir! This level of turning is way beyond my old Atlas lathe! I'm just proud to now know what CBN is.
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 :)
I am always throughly amused, when you amuse yourself. Loved the elegant comment, story of my life. Have a good weekend.
As always a fascinating video Stefan - love the precision you can achieve with simple tools regards Sarah
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
Very interesting Stefan.
Soooo much knowledge in that german head. Thank you for sharing with us.
Great Video.
wow that"s great work and great knowledge flying around on this video. low tech, high skills. thanks for sharing.
Way better watching than the tv, you should change the channel name to perfect precision on the cheap.
"Budget precision"
@@StefanGotteswinter thats good too but there is precision i do and perfect precision you do 😉
@@StefanGotteswinter ergonomically conscious.
@@StefanGotteswinter economically conscious...damn spell check.
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!!
GREAT VIDEO! I like your meticulous nature and knowledge Stefan, wish I had these abilities.
You do. Do what Stefan does. Watch,learn,do.
Excellent as always :)
FWIW, you had it right the first time. "Tan-Jent". The "G" makes the same sound as the "J" in "Just".
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.
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 😁.
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...
Oh loved it as always... Keep em comming
Another great video. Thanks. I learned a lot that I can put to use.
As always awesome educational video 👍 Thank You for sharing.
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 found a rusty c-clamp. Video upcoming.
Just Joking. Its a rusty pitchfork ;)
@@StefanGotteswinter 😂
😂😂😂😂👏👏👏👏
Nice work Bud!
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
G’day Stefan, very interesting, thanks for sharing.
Cheers
Peter
Excellent precision video Stefan. May your Atoms never be at rest🤔
Thanks as always!
Awesome video. Thanks for Sharing your knowledge, Stefan.
I always pick up techniques and methods to incorporate into my watchmaking workshop.
Cheers,
Reuben
another great video
The ones from McMaster are "Needle Eye Laps" made by Acro Tool & Die Works. They come in packs of 12, with the expander tool.
These are mild steel --- actually better than brass for lapping hard steel OR carbide . Also try Borzon.
MUCH better for hard steel 😎
(Some kind of c b n like abrasive)
Inspiring, as always. Your craftsmanship is second to none.
Its for sure third to a lot. I just happen to stick everything in front of a camera. Thousands of quiet, high skilled machinists, toolmakers, moldmakers, etc out there doing higher class, more precise work than I do.
Stefan Gotteswinter those folks would be on a level of machining that I’m not even sure I could enjoy. I suppose due to your modesty, us 200lbs gorilla hobby machinists, can still enjoy. And also build a few of your projects.
I built your parallel comparator/surface gauge you made a while ago. Turned out very well, except for the ball bearing feet. I could not get them loc-tited in and grind them without heating them up.
I’m struggling to imagine a higher degree of precision than yours and why that would be needed. OK, so the 1 micron diamond paste was too fine and you switched to 3.5 micron paste to speed things up, but geeze! (BTW, looking forward to seeing what those bushings and rollers are for given the care and precision. I know you said you can’t reveal the product but I’m guessing this is not a tubing bender!)
Great video
Thank you, very interesting and precision as per normal for you
Great topic 👍 thanks.
thanks for the valuable information you share. good filming work also
Thanks for the video.
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
Beautiful work. I wish I could do that kind of work.
Nice work and demos of the cbn.
Thanks Randy!
Very informative video 👍👍
Great info thanks for sharing
Thanks 😊 Very much enjoyed
Far out you are a very clever man
Thank you!
Great tips on lapping! :)
Good Stuff Stefan, enjoyed!
ATB, Robin
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!
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?
Thats tough, because I dont know a lot of machines. I ran a bunch of industrial machines, some hobby machines and thats it. And doing a video where I walkt trough a catalogue with photos of machines is tricky because of copyright laws.
@@StefanGotteswinter Thank you for the kind reply!!! Well... I didn't expect a catalog detailed review - I'd be more than happy if you share your thoughts of good quality brands and/or manufacturers, from your experience.
good work!
Excellent. Now i'm off to find some CBN.
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 👍
There is always that one guy at a fleamarked. Selling a rusty wrench, his grandmothers old potts, an original copy of the necronomicon and a brand new box of inserts ;)
@@StefanGotteswinter .Very true and most observant comment but you forgot to mention that you have to be at the right flea market at the right time .
Awesome episode. Love your teachings
Thanks stefan
"I find that most of the time off-hand [freehand] grinding is good enough"....Trust me, it entirely depends on who's hands we're talking about!! Yours are clearly well calibrated.
A very informative video Stefan.
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 ...
Well done thank you !
regards Skip
Stefan i use the same methods as you do i make bullets useing the swedging process interesting work .🎯😁
Super Video👍 wieder viel Neues gelernt 😀 Gruß Robin
Waaaaaaaay gooood enough!!!$ like it.
"... 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 🙂
ther's alot to learn here!
Elegant!
My grandfather was showing me how to get cbn inserts off with mapp gas but unfortunately he passed away before it got hot enough
tony!!? hey old tony!! You see this.. its very nice..
Professional machining, we provide the high performance CBN inserts which apply for cast iron and hardened steel HRC58-62 turning