Liebherr connecting rods

[@arduinoversusevil2025]

11:45 He IS human!

[@billjenkins1416]

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

[@ManicChampion]

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]

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

[@StefanGotteswinter]

*Writing this comment with a Guiness on my desk*

[@xmachine7003]

And....gone😂 Happens to All of us

[@stumccabe]

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.

[@nickandersonco]

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

[@ManicChampion]

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

[@nickandersonco]

@@ManicChampion 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.

[@ManicChampion]

@@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]

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

[@Kbnexkt]

Cccx cc c c Nbm a. 😂,

[@rodfrey]

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

[@DrYosh2]

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. 🤔🧐🤓

[@brucewilliams6292]

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.

[@ManicChampion]

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.

[@craigsuslosky3974]

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.

[@a.bakker64]

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

[@robertdebusk6157]

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

[@OldtimeIronman]

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.

[@martin_mue]

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. :-)

[@matthiaspenzlin6465]

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.

[@crichtonbruce4329]

You are such an awesome teacher. Thanks!

[@johnvaluk1401]

Always satisfying watching your work.

[@lohikarhu734]

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]

We've all learned from Dan Gelbart, thanks to his famous prototyping video series kzbin.info/www/bejne/rn6zkHScnrOfjpY

[@hyperion9538]

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

[@richardsweet5068]

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

[@SailingYachtDreamcatcher]

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

[@solverbox]

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!

[@copasetic216]

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

[@jimsvideos7201]

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.

[@philiprogers5772]

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

[@xmachine7003]

I admire your work. Thank you. Chuck.

[@charlieromeo7663]

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.

[@brendanbarbour8568]

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.

[@TrPrecisionMachining]

good video stefan..thanks for your time

[@SHx-do9iy]

...wieder mal ein super Job - Top Video

[@TheUncleRuckus]

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

[@ROBRENZ]

Beautiful parts Stefan! Enjoyed. ATB, Robin

[@hdheuejhzbsnnaj]

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.

[@joell439]

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

[@FinnoUgricMachining]

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 :-)

[@mr.b2232]

Fascinating as always. Veilen dank.

[@frijoli9579]

Always enjoy your videos!

[@4speed3pedals]

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

[@mpetersen6]

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.

[@howder1951]

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!

[@firstmkb]

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

[@RRINTHESHOP]

Very nice work Stefan. Enjoyed.

[@crozwayne]

Nice work Stefan

[@googleuser859]

Excellent and informative as always, thank you.

[@brandontscheschlog]

Very cool and I learned some valuable fixturing technics!

[@cavemaneca]

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

[@mr.noneyabidness]

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.

[@jonsworkshop]

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

[@Smallathe]

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

[@jeroen-surf]

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

[@624Dudley]

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]

Explain please?

[@lohikarhu734]

@@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]

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

[@jdmccorful]

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

[@wrstew1272]

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

[@zygmuntthecacaokakistocrat6589]

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

[@steamfan7147]

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.

[@thetrevor861]

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.

[@ReubenSchoots]

Another great video, Stefan. Thanks mate!

[@arnljotseem8794]

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.

[@jimh2887]

Thank you for another excellent video .

[@Zappyguy111]

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.

[@MattysWorkshop]

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

[@turningpoint6643]

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]

Probably it's a scale model?

[@MrVdmg]

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

[@gar50172]

You’re brilliant dude

[@EngineersWorkshop]

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]

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

[@StefanGotteswinter]

Yes, correct

[@jessehall8168]

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

[@kunlegrant369]

EXCELLENT CRAFTSMANSHIP MR GOTTESWINTER

[@AmateurRedneckWorkshop]

Thanks for another interesting video.

[@EmmaRitson]

enjoyed very much stefan

[@DudleyToolwright]

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

[@2lefThumbs]

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

[@RUNCNC]

Did you free some space around the kontur of the part, so that the endmill doesn't catch the aluminium? I had some problems with milling steel on the router as you can see in my vid. The alumium clogged the flutes on the last turn. The fixturing is very nice!

[@kanetw_]

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.

[@TomChame]

Very interesting, thanks.

[@tinker5349]

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

[@donmittlestaedt1117]

thank you.

[@johnharding9936]

Amazing work stefan. Can you tell me what the hole spacing is for your cnc bed. I'm just getting ready to prepare mine for a similar machine and would love to know what you used on yours. Thanks for the knowledge!

[@burningdieselproduction5498]

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.

[@frandiminic3559]

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.

[@MaxWattage]

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.

[@antonlancevic652]

Do you have a video how you are managing waste (metal chips, oil etc) ?

[@angelramos-2005]

Excellent.Thank you.

[@swanvalleymachineshop]

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

[@hairyfro]

Not sure I understand why you countersunk the holes before reaming. Is it to help guide the reamer?

[@davesage9190]

Stefan: I believe in an earlier video you had settled on Alibre as your CAD package. What CAM package are you using?

[@StefanGotteswinter]

I have a seat of Bobcam V32 Pro.

[@macsmachine2609]

Beautiful parts.

[@1eonwo1f]

Does the tumble finish not affect the precision holes because the media is so much larger than the holes?

[@dwightcarlson7136]

Excellent work and teaching commentary! So are these parts for model loaders?

[@robertd9928]

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

[@swarfy5377]

Do those drill bushings have heads on the underside of the fixture or are they relying on the Loctite to hold them in? Is there a danger that the screws might pull them out?

[@inzen86]

Great video and a lot of useful info. But no comment on the partially milled M6 bolt ? :P

[@glennstasse5698]

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]

Yes, a RC Model

[@menow.]

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

[@bcbloc02]

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.

[@Joelsfilmer]

Hi Stefan! Do you have a particular reason for not using a spindle clamping indicator holder on the CNC?

[@StefanGotteswinter]

Yep :D I did not have one at the time. Since then I made one that slips over the ER Nut of the spindle and clamps on there.

[@Joelsfilmer]

@@StefanGotteswinter Cool! Hope to see a pic one day! Do you have any plans for a quick change spindle like you had on the Isel?

[@StefanGotteswinter]

I would like the Teknomotor spindle with the manual HSK toolchanger, since it is a drop in replacement for my spindle.

[@Joelsfilmer]

@@StefanGotteswinter Interesting. So you've scrapped the plans for a tooling rack and automatic tool changes?

[@davidrule1335]

Another Great Video!!

[@Thomas-cw2wl]

I was wondering what make and model is that end mill that you are using here

[@hoyospetrola]

Mooooore stefan. We need mooooore

[@graemebrumfitt6668]

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

[@zachaliles]

Liebherr as in the cranes? My dad was a crane operator, super heavy lift, and he told me once that liebherrs were some of his favorite cranes to operate.

[@mpetersen6]

They also build gantry style parts handling systems, robots and other equipment.

[@waynec369]

Liebherr is into LOTS of different industries...

[@MultiArrie]

cranes, loaders, dumpers, refrigerators freezers and so on.

[@ronalddavis]

there are over a hundred slewing studs in a shipboard liebherr. hard work changing them all out. have to use a stud stretcher to take out and replace.try it in august in south alabama

[@Whitefirekith]

Stefan, can you recommend a quality endmill company? I am tired of all the chinesium products in the U.S.

[@nitailevi8001]

You were going to say flarallel 👻

[@ICaughtAMarlin]

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

[@Engineerd3d]

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

[@euroman12000]

Awesome educational video! I need your opinion Stefan, I have a Chinese mill, Bernardo KF 25L, and the spindle gets hot after running it under load for about 20 min. I tried it with no load and it got warm. Do you think it has a bad spindle bearing? There is no strange noise, everything sounds smooth when running it.

[@Gottenhimfella]

How hot? 60 deg C is fine after running for an hour without load. It sounds to me as if you might have a decent amount of (axial) preload in the bearings. If they are taper rollers, this makes them run quite hot. But if you are milling heavy work, or want a decent finish, you want them preloaded to the point they will generate that sort of temperature.

[@MarinusMakesStuff]

Out of curiosity; how badly do the plastic pyramid beads release microplastics into the environment and how is this handled by professionals?