The ratio of practical information to video minutes was off the charts in this one. Thanks!

@DrYosh2

3 жыл бұрын

No kidding! It's my first time hearing of diamond pins and overconstraining a part. Gives me lots of new ideas on how I can produce a very simple fixture for my cylinder head resurfacing needs. 🤔🧐🤓

I'm not a machinist, but a CAD designer, but I always learn so much from your videos. Thank you!

@ASP1NALL

3 жыл бұрын

You should definitely do some machining, you need to know how to make the things you design.

@nickandersonco

3 жыл бұрын

@@ASP1NALL I've dabbled with CNC routers, a bit of manual milling, and can 'weld', but that doesn't make me a machinist lol. These videos sure help me design better parts though. Now Stefan on the other hand is a machinist.

@ASP1NALL

3 жыл бұрын

@@nickandersonco good man! Ask the shop staff to have a go every now and again, offer a hand with something attainable; the worst that can happen is you get laughed at, and we've all suffered that as apprentoids. It builds character!

@ensen89

3 жыл бұрын

I am a mechanical design engeneer and I wish I could work with craftsmen like Stefan.

@Kbnexkt

Жыл бұрын

Cccx cc c c Nbm a. 😂,

Thanks Stefan. The use of diamond locating pins is something I was unaware of - of course it makes complete sense and it seems so obvious I don't know why I didn't think of it! I always learn something from your videos. Excellent, thanks.

11:45 He IS human!

@billjenkins1416

3 жыл бұрын

Not possible, maybe that’s where he let someone “help” him lol

@ASP1NALL

3 жыл бұрын

Correct but he is also a JURMAN. They are sustained by German bread, German sausage, German beer and German efficiency. There will be many hours of penitence for this transgression.

@Just1GuyMetalworks

3 жыл бұрын

Maybe... he did make that one extra part in advance. Possibly some kind of predictive algorithm 🤣.

@StefanGotteswinter

3 жыл бұрын

*Writing this comment with a Guiness on my desk*

@xmachine7003

3 жыл бұрын

And....gone😂 Happens to All of us

I'll share a tip, but only for a minute (sorry I couldn't resist, I've seen AvE in here), we use a lot of small fixings at work, and you'll find that when you use something like an M3 for a while, either the Allen key or the socket hex will get worn out. We've recently come up with the idea of going over to torx key fixing for these small sizes as you can lean on them abit more before they round off. Might be of use, might not; I'd say it depends on how many times you'll use that fixture and whether you can resist the temptation to release your inner gorilla to TIGHTEN that little thing. We machine monkeys are naturally inclined to make sure the parts very fixed down after all.

I learn so much by watching your channel. I love the variety of projects you take on and the fact that you go over why you are doing things the way you do. Thank you.

I guess the information that it is for a RC-model Liebherr machine is kind of essential. Was puzzled till the end of the video where they designed in such a part in a full size machine. :-)

regarding diamond pins: each lathe is contructed in a similar way: one rail constraints regarding two dimentions ( most times the rail in the front) and the other rail only in one of the dimentions (most times the rail in the rear). for the tailstock it is vise versa.

Ah, "constraints", a rather interesting subject...I was, happily, introduced to kinematics rather early in my career, by a guy named Dan Gelbart, one of the kind of guys with a jig borer in an isolated slab room in his basement, with high-speed air conditioning to ensure constant temperature, and isothermal, environment... my best friend had a jig borer in his basement, too, with laser interferometer 3D measurement system... these guys knew a thing or two ;-) it's great to see Stefan putting these kind of practices in use, and letting us watchers learn, and, learning, too, from those broken end mills! Thanks, good sir, a nice video with some nice embedded teaching. If possible, it might be nice to have a link in the description for some of the "goodies", like your tumbling medium? Mit freundlichen Grüßen!

@MattOGormanSmith

3 жыл бұрын

We've all learned from Dan Gelbart, thanks to his famous prototyping video series kzread.info/dash/bejne/qoGEwaOfmbHSiJc.html

Thank you for this! I do liebherr machines in the USA for my work, I do the welding and machining to assist the mechanics. My employer buys the 50- ton capacity machines.

The stress in the cold rolled materials is especialy on the outside of the material. Good that you mention this 👍

Wirklich interessant es Video! Ich absolviere gerade meine Ausbildung als Industriemechaniker und hier lernt man wirklich hilfreiche Tricks und Kniffe

Beautiful work as always! Thanks for explaining the fixture itself, and the diamond shape bushing for locating, great idea. I also liked seeing where the parts were going and what they would be used for! Thanks for sharing.

You get to work on the coolest of things, and they come out looking excellent. I am always amazed at your ability to adapt to the job at hand. I would worry for days trying to decide how to fixture the new part. This shows your experience and mastery of set ups. I never get tired of watching you work. Thank you for sharing your work, and set up thoughts. Take Care and Stay Safe. Bob

NO idea what to expect. From a very bad 'knowledge' of German, I thought er, 'Dear Sir' er, something-something. And I was and still am, very wrong. Absolutely fascinating work, thank you.

I like the tumbled finish idea, may look into building a small one.

Always satisfying watching your work.

I sort of hate CNC/virtual machining ... BUT ... This time I found myself sitting and consuming that stuff without any negative feelintgs. It was quite the opposite, I really liked it. Especially when I noticed that even with CNC one has to keep the reality in mind. Thanks for taking the time to explain the importance of avoiding over constraining. Edit: The M6 bolt seems to have suffered some collateral damage at some point :-)

There is so much GD$T in this video. The use of that fixture in the vice, is also a test gage for functionality in the decode stage to ensure proper mating conditions! Great video bud, DEEEEECENT.

You are such an awesome teacher. Thanks!

Great overall view of a small production run (in stainless no less) using a CNC router! Thanks for the awesome content, its very informative and I'm personally learning a lot from your experience!

Thinking after seeing title: Liebherr . . . make multi-tonne excavators, cranes, tractors etc. . . . is Stefan scaling up in his endeavours? Watch video: ah, no. :)

Be still my heart, two of my favorite things R/C and Machining combined into one video, yes please!! 👍👍

Excellent comments about fixture design*. For a quick and dirty one time/one part fixture over restrained is OK. For multiple use you definitely need a diamond profile on the feature that is not the datum hole. *fixturing is the basis of all manufacturing of mass produced parts. Be they machined or welded.

Funny, I just learned about the diamond shaped locating pin yesterday from another youtuber. Judging from your hands, you have been play-fighting with the cats :-) I remember that from my cat days.

Precision workmanship as usual! Thank you for the excellent content!

I've been meaning to try the diamond head. I always use a slotted bushings, but they are hard to get aligned perfectly. This is a nice way to do this quickly with shop tools.

Fascinating as always. Veilen dank.

Nice job fixturing that part. I use a lot of drawn 303 at work, it's nice material, but as you say contains a fair amount of internal stress. A good percentage of my work starts at the heat treat oven to normalize the material first for that reason.

Stress in cold rolled steel , never realized that machining just one side could be detrimental to the final size. Thanks for the tip.

Hi Stefan, I thought that use of the diamond ground hollow pin on the fixture was inspired...totally overcomes the problem of over constraining the part on the fixture...I never would have thought of it...Respect..keep up the good work.

Very nice video Stefan. The whole time, I am wondering where these parts go on a HUGR Liebherr machine, great anticlimax to find a toy sized loader! Cheers!

This was an awesome episode. Thanks for the details, including how to make and use diamond pins. These finished parts look amazing. 👍👍😎👍😎

...wieder mal ein super Job - Top Video

Great timing for this. I have a very similar application and this will be a good solution. Thanks as always!

Thank you as always for sharing so much knowledge; you have saved me a lot of trial and error as I learn and I appreciate it.

Nice work Stefan

Beautiful parts Stefan! Enjoyed. ATB, Robin

thank you for the feeds and speeds it gives us a point of reference for your cnc machine.

Great stuff Stefan. I always learn something in your videos. I will use that fixturing process next time. Thanks, Cheers from Florida’s Space Coast.

good video stefan..thanks for your time

I admire your work. Thank you. Chuck.

I spent the entire video wondering what these were for. Nicely done, Stefan!

Always enjoy your videos!

Very nice work Stefan. Enjoyed.

Hello Stefan - I very much appreciate your teaching style (in English no less!). If I may offer a comment: on your fixture, because the first constraint occurs around matching cylinders, it becomes clearer to define the three degrees of freedom in cylindric coordinates. The diamond pin constrains the angle Theta.

@jdmccorful

3 жыл бұрын

Explain please?

@lohikarhu734

3 жыл бұрын

@@jdmccorful the diamond pin only constrains the angle of rotation, Theta, of the part, and allows for things like material expansion during processing, but the part dimensions are all related to the round pin that sets the zero in X-Y...it appears that the part has low specified precision in Z(?)

@StefanGotteswinter

3 жыл бұрын

Ah! Yes, thats a better explanation, thanks :)

@jdmccorful

3 жыл бұрын

@@lohikarhu734 Thanks , I have a better understanding now.

Interesting, thankyou for your time,

Stefan, your hands look like you have been playing with my cat! Always look forward to seeing your videos posted. Very informative!

You’re brilliant dude

Excellent and informative as always, thank you.

Great fixturing tip👍my dear man (or something like that, according to my not-so-good inbuilt translator😉)

Hi Stefan, nice job, the vibro polisher leaves a great finish. Diamond pins........ A bit like you were second nature in the tool room and in fixture design etc, great to see them in the home shop! Cheers, Jon

Finally a project video again! 😃😃 More of this please!!

Very cool and I learned some valuable fixturing technics!

I was watching CEE (cutting edge engineering) before this video, and i see this. WHAT Stefan went in big parts machining?!?! The whole video and the title are not connected in any way for me, untill the end when AHA thats what he ment haha.

EXCELLENT CRAFTSMANSHIP MR GOTTESWINTER

It's great to see another video from you! I hope you've been busy.

I worked most of my career in the open pit mining industry Stefan and am quite familiar with that Liebherr brand and what they build. So the video title caught me by surprise you could fit or make almost any Liebherr part in your shop at all. :-)

@bigbattenberg

Жыл бұрын

Probably it's a scale model?

Another Great Video!!

The router is working surprisingly decent in stainless. I was wary of getting a router at first over an actual CNC mill, but this might be acceptable for my purposes.

I always learn something new. Thank you! I wish I could make a part with you... That would be an awesome experience...

I recently tried a climb/conventional cutting pattern while rough clearing on my little router, I found that I was recycling chips back into the cutting zone while conventional cutting and that I had to halve the feed of the overall roughing because my spindle was getting bogged down trying to conventional mill. Yeah, great plan for quick clearing, but not great for a tiny router.

Those are much smaller than the connecting rods in the 900hp Liebherr diesel in the Deere forage harvesters. :-) Personally I would prefer my digging equipment not have built in stress concentrations but if the links are beefy enough it won't matter.

Thank you for another excellent video .

Another great video, Stefan. Thanks mate!

We call the real ones Dog Bones . Great job , nice finish with the tumbler . Cheers .

Nice video Stefan! I'm glad to se you in the RC model waters! Please, if the client allows, drop us a link so we can se the progress of the build.

I would use 303 for everything if I could, (because of its machinability), but as far as I can tell it is only available in round bar form in the UK, we can't buy rectangular bars or plate.

Gday Stefan, the CBC router does a really nice job, great video as all ways, Cheers

Excellent.Thank you.

enjoyed very much stefan

Very interesting, thanks.

thank you.

Beautiful parts.

Thanks for another interesting video.

nice work

Tolles Video! 😀👍

wonderfull! learned a lot and awesome filming, as always i would say !

You were going to say flarallel 👻

@ICaughtAMarlin

3 жыл бұрын

It's a technical term, don'tcha know 😉 I'm about to start using it as much as I can 😁

Hi, as always very interesting and informative, thanks for sharing.

flarallel, adjective: meaning that something is flat and parallel at the same time. (c) Stefan Gotteswinter 2021

Neat project!

I'm trying to understand that second fixturing pin, in order to constrain the part only in the y direction but still allow for small potential center-to-center length changes in the x-direction the points of contact would literally have to be almost points at 12 o'clock and 6 o'clock correct?

@matthiaspenzlin6465

3 жыл бұрын

you are right - but (!) the error in this direction is much much smaler due to the geometrie.

@StefanGotteswinter

3 жыл бұрын

Yes, correct

@jessehall8168

3 жыл бұрын

That's why its polished down a few micron under as well

These parts will be used in a model of the loader? A prototype of some sort? Did I understand that correctly? Assuming so, that will be some model! What happens next to them? And , of course, spectacular work all around. Stefan is an encyclopedia of machining.

@StefanGotteswinter

3 жыл бұрын

Yes, a RC Model

Nice job!

In the US. we would say that 6mm cap screw got "Tagged" LOL🤫

Thanks 👍

Love the mixed machining aspect of this. CNC router machining stainless is pornographic. Very nice work indeed.

Warum hast Du die Aufnahmebolzen nicht gleich auf der CNC auf der Spannplatte angefräst? 2 mm Höhe hätte gereicht, Du hättest Dir das neuerliche Zentrieren auf der CNC, das Fertigen der Einzelteile inkl. Passungen und das Einkleben erspart. Und die 8 Teile hätte es das Aluminium auch ausgehalten.

Mooooore stefan. We need mooooore

Very nice, looks like that poor sockethead took a swipe from the cutter :'D

Hahhh.. Das gute alte Liebherr-Zeichnungslayout. Egal ob Kühlschrank oder HLC, eine Sache haben sie alle gemeinsam 😁

😲 Found out about diamond pins only yseterday, never likely to need them but a clever idea 👍

I wonder why the abrasive finishing media does not get inside the reamed holes and disturb the final dimension of of the holes.

Really nice!

Aaaaw yeah! A new video!

Reminds me of that movie flight of the Phoenix, they rebuild the plane after it crashes, following the instructions of the German guy, only to find out he makes MODEL planes lol not full-size ones.

@Calligraphybooster

3 жыл бұрын

Yes! Remember that one! Watched it age 10 or so on a b&w portable in my grandparents’ spare bedroom, when I was supposed to be asleep. 30 years later I discovered they did a remake that is nothing but a copy of the original. Has always puzzled me why they bothered...

Stephan, always entertaining. Do you have channel stickers? I have never seen you mention them, but thought I would ask.

Cool, just cool :) that's all Stefan! TFS, GB :)

Hello Stefan nice work but a litle sort so I look the vidio 2times 👍👍😉