Thanks for sharing uncle Robin. But please dont make us wait another year for the next part 🥺

@IGBasov

3 жыл бұрын

just watched at your last video. Great job, nice watches

@IGBasov

3 жыл бұрын

Greetings from Russia! There are a lot of your subscribers here

@hereticswissery9010

3 жыл бұрын

Thanks to Instagram crashing I guess :P

@jFloRED

2 жыл бұрын

Ca Lem. Yeah you don’t make us wait either 🙏😝👌🤞

@ROBRENZ

2 жыл бұрын

I will try my best

Thought I was going to bed but I didn’t realize that today is Christmas. Thanks for the gift.

Ok "rough" grinding complete. Next up the fussy stuff. Awesome as always Robin. Cheers, Tom

@ROBRENZ

2 жыл бұрын

Thanks Tom, means a lot coming from you! ATB, Robin

@davidwillard7334

Жыл бұрын

NO !! NEVER !! TO !! YOU !! EITHER !! YOU !! YOU !! TUBE !! THIEF !!!

I love how deeply you discuss the physics of metrology. Truly stimulating, and not too nebulous for a viewer like me.

That was cool! Your AutoHarig is such a nice machine, cool to see it in operation. Loved the input about geometry considerations on flat spin grinding, thats a topic completely foreign to me so far.

@ROBRENZ

3 жыл бұрын

Glad you enjoyed it

@Watchyn_Yarwood

2 жыл бұрын

I knew you would be here! Your turn, Stefan!

@Goodwithwood69

Жыл бұрын

We need to get him back! I miss this level of accuracy!

*spends hours setting up grinding operations, achieves a parallelism most people only dream of* "Yeah, its a bit conical. But that's ok, it'll get lapped anyhow" Your patience and dedication is incredible, truly a role model

Once again Robin shows how the seemingly impossible can be achieved. I’ll probably never need to work to these limits but I always learn something during the vid that I can use. Thank you.

@davidwillard7334

Жыл бұрын

JUST !! ANOTHER !! YOU !! TUBE !!! THIEF !!! ON ! HERE !!

Master Class on fine Toolmaking.

I always enjoy your perspective on how a whole system of forces governs the outcome rather than just the interaction between surface and cutting tool.

@miles11we

3 жыл бұрын

Yeah its interesting when you start realizing everything is somewhat incorporated into the set up, the heat in the air, how much your body weight moves the concrete slab.

Hey Robin. I know it's been almost a year from your latest video. Hope all is ok. Just want to let you know that your videos inspired me to continue my education into engineering and deeper into tool making. I have gained an almost annoying attention to detail. My boss has given me so much due to this trait. As in more complex work and jobs along with a huge pay increase and title promotion. If it weren't for people like you in the trade young men like me wouldn't have mentors to guide us to the top. Thank you for being sooooo educational and percise. You don't know how much it means to guys like me in the trade to have these structured lessons. Thank you again for all your hard work.

@ROBRENZ

2 жыл бұрын

Thanks for the kind words and encouraging story. I hope to get back to doing videos soon.

@aleks138

Жыл бұрын

@@ROBRENZ please do. I learn so much from them

@mlt3258

Жыл бұрын

Agree tremendously!!!

37:45 This shot is pure joy. Watching the pattern of the sparks go from continuous cut to four very short bursts at the tippy-tips just like the geometry predicts is very, very satisfying. (You can hear it in lathe work, but seeing it in sparks is so nice. Maybe I'm just easily amused.)

@davidwillard7334

Жыл бұрын

And ! QUITE !! CLEARLY !! A !! COMPLETE !!! WHACKO !! TOO !!!

50 years of experience in 1hour.I'v heard things that I will never ever think off.Priceless.Thank you

@ROBRENZ

2 жыл бұрын

Glad you enjoyed it

It's a joy to watch someone who truly understands what he is doing ! I think Robin and Peter are so unselfish in sharing their knowledge. Most utube "machinist" are fumbling in the dark and mislead many. Thanks for sharing.

@DavidBaumgarner

2 жыл бұрын

I am sorry to say I am not familiar with the Peter you refer to. Could someone please share as I would certainly like to fix that situation. (Or you could just give me 100x more Robrenz videos. THAT would be perfect but alas, he is too busy doing real things to do videos full time. heh)

@waynepegram3262

2 жыл бұрын

@@DavidBaumgarner kzread.info/dash/bejne/h5iVtayPc7SeoKg.html

@DavidBaumgarner

2 жыл бұрын

@@waynepegram3262 THANK You Mate!

Always good to hear your insights, 45 minutes well spent.

@ROBRENZ

2 жыл бұрын

Thanks for stopping by Stan. ATB, Robin

Honestly, I don't feel worthy to even watch this fantastic video. However, I do feel blessed. Thank you!!

@ROBRENZ

2 жыл бұрын

Glad you enjoyed it!

Found here by Stefans recommendation on his video. Sir, you have excellent YT channel which offer wealth of hard earned knowledge and is enjoyable to watch. Thank You.

@ROBRENZ

2 жыл бұрын

Awesome, thank you!

1 year between parts. I appreciate you finding a time to share your experiences, Robin

Robin is one of the few guys I'm sure smiles everyday he walks into his shop to go to work. Awesome stuff. I'm glad I don't have anything that can measure to your levels otherwise everyday will be an existential crisis :-)

@pontoonrob7948

2 жыл бұрын

I think the word "existential " needs to be canceled.

Robin. There aren’t enough words to describe how much I like your channel. Absolutely amazing. I am not a machinist but studied engineering drafting and the mechanics of deformable solids in college, been fascinated with anything that requires mechanical precision ever since. To see you work on design improvements, anticipate process issues and account for all materials deformation is pure pleasure. Keep making those videos, awesome work.

@ROBRENZ

2 жыл бұрын

Wow, thank you!

Im liking the custom plastic shrouds over the handles

Great work. We shared this video (and part 1) on our homemade tools forum this week.

Far away is the day we will be able to achieve such precision on our tool and cutter grinder ! But the grinder finish makes for a good illusion of being precise. Best wishes from Switzerland ! I love your videos, packed with informations that I might need, but most likely won't, but that I anyway very much enjoy !

Glad to see you back brother! I'm thankful that the Lord has kept you to return!

@ROBRENZ

2 жыл бұрын

Thanks and yes he has!

You are my hero. I am not articulate enough to express how much I enjoy watching you progress through the projects. Thank you.

Tremendous detail and engineering setup, some great tips on metallurgy and brilliantly narrated. Always a pleasure to watch your videos, thanks Robin.

I have watched all your videos, it’s a joy , thank you

Thank you for sharing your knowledge & expertise. I work in a small job shop & anytime an operator complains about me being to "picky" on my metrology, I point them to this channel & let them enjoy the doorway that +/- .005 really is. I love this stuff!

@ROBRENZ

2 жыл бұрын

Glad to help

I look forward to your videos 10x more than I looked forward to Avengers: Endgame. No, more like 100x.

Awesome. You cover so many interesting topics in so much detail, all while giving insight and tips that are unmatched. Thank you for your videos

@ROBRENZ

2 жыл бұрын

Glad you like them!

Finally part 2! Though I'm one to talk about long overdue videos...

As a Watchmaker I'm used to work within what most People think as 'Insane Precision' (± 0.001 - 0.005mm) But those People don't work with Metal and they rarely work with Machinery. By now I am used to think 'Oh Robin is doing ridiculous Precise stuff again' With my grinding work I never have to consider if my machine is growing in size as it warms up, the Change in size won't even show up on my Instruments. I appreciate the Educational Work you do. I've learned so much even for the 'Precision Range' I work with :)

I will never be working to these tolerances but I really enjoy your discussions of what needs to be considered to work at this level of accuracy. Of coarse it starts to influence my work at the tolerances I work at in a very positive way. Thanks for taking the time to video this.

My goodness. What a treat. Thank you.

I was a job shop machinist for 15 years. I had a "Dumor" tool post grinder for my South Bend 17" Turnado. A half thousandth was my idea of precision.... You, my good sir, are in a whole other league.... This is fascinating. Thanks for explaining everything so thoroughly.

Great video, thanks. Your videos are always packed with experience and insight, and an absolute joy to watch. Look forward to part 3! All the best!

@ROBRENZ

2 жыл бұрын

Thank you very much!

Thanks for putting the work into these. As someone who only tangentially touches on metalwork, I find these super interesting and useful.

So funny I just revisited the first tool room spindle video LAST NIGHT! Thank you robin keep it up we love you and appreciate you !

@ROBRENZ

3 жыл бұрын

Awesome! Thank you!

@billythebake

2 жыл бұрын

LOL, I did the same thing...

Haven't got a clue what you are talking about but I'm addicted

Hey Robin, I’m a 25 year old self taught mechanic turned machinist. I’ve turned into the go to guy at the company I work for to do most off the tooling/tight tolerance work that we do. I just want to thank you because your channel opened my eyes to elasticity and it has changed my out look on everything. Thanks you for sharing and I can’t wait for the next video

@davidwillard7334

Жыл бұрын

WHY ! DO ! YOU ! WANT ! TO ! KNOW ! THEN !??

Pleasure to watch. Like getting the correct answers to a test.

Really informative and entertaining video, thank you. Your comments around geometry and ensuring your grind is as good as possible to help you finish the parts are spot on. When I was an apprentice 25yrs ago, one of the best engineers I’ve ever worked with told me “the secret to good finishing, is good roughing”. I have always remembered this and it is so true. Keep up the great work, I find your work fascinating.👌

@ROBRENZ

2 жыл бұрын

Thank you very much!

Robin, Thank you for the valuable insight. A lot learnt. Cannot wait for the next installment on these spindles. Regards, Reuben

@ROBRENZ

3 жыл бұрын

Glad it was helpful!

What you sat is so true precision is more about understanding and negating the weaknesses of your machines than their basic accuracy, not to say that the job you have done on your grinder is not superb. Another hour of engineering bliss.

Masterful, Robin. Thanks as always.

@ROBRENZ

2 жыл бұрын

Thanks for listening

I did not realize that fact about the modulus of elasticity not changing. Great video as always!

@morganmcintire2853

3 жыл бұрын

I remember reading about the effect of tempering on the modulus of elasticity in metals in a compresser engineering report written by Perdue University about compressor flapper valves made from Sandvik 20C 7C27Mo2 and Hiflex. In one of their tests they decided to see how hardening and tempering affected the modulus of elasticity of the parts. They subjected several samples of each material to 12 different tempering treatments and found that affect of H/T on the metals actually affected some slight changes in the anisotropy of the H/T strips but they were relatively small maxing at around 5% Δ so relatively negligible.

@ROBRENZ

3 жыл бұрын

Thanks for that input!

@morganmcintire2853

3 жыл бұрын

@@ROBRENZ No problem, Btw I love watching your videos I learn so much about the "Ultra Precision" world every time I watch. My line of work resides in the thousands and ten thousandths of an inch. I've never ventured into the millionths.

@TheMetalButcher

2 жыл бұрын

Jeff, not only does it not change across temper, but it is relatively constant across steels/ materials of a family.

I appreciate your videos and your thoughts more than I could ever express. Thank you.

I had to tell the wife to shut it because Renzetti was on! You could steal the show at IMTS and just setup a booth and sell shirts and take a picture with Robin day. Alway impressed and never disappointed in your content.

A tour de force of top notch education. Thank you so much Robin. I am definitely going to have to watch this video several times.

@ROBRENZ

2 жыл бұрын

Glad it was helpful!

Fascinating to think about oil film dynamics and wheel loading and column expansion as sources of systematic errors. Always excellent, thanks for being an inspiration.

What an absolute joy to watch. This makes me imagine what it might have been like looking over someone’s shoulder in the Moore shop.

Woo Hoo- New video!!!

Wow. Finally a new treat from mr ROBRENZ. Thanks for sharing

You're an inspiration Robin, thanks for sharing. 🍻

@ROBRENZ

2 жыл бұрын

My pleasure!

Man that's some good looking hardware.

Outstanding video, part 1 and 2. Thank you very much Robin.

The long awaited Sequel!! Great stuff Robin. I've watched the first one a half dozen times already, will probably do the same here.

@davidwillard7334

Жыл бұрын

GEEZ !! YOU !! MUST !! BE !! CLEARLY !! BORED !! RIGHT !! OUT !! OF !! YOUR !! BRAINS !! HERE !!!

I learn from your voice over and get entertained and amazed by the video. Thank you.

@ROBRENZ

3 жыл бұрын

Glad to hear it!

Saying a prayer for part 3 🙏

I'm a Conn. native & used to enjoy seeing old Bridgeport machines used in local shops. Monolithic juggernauts 👌🏽

Had to wait a week to watch this video in a manner I could concentrate and learn something. Love the automated grinder. Thank you for the effort to make this video Robin.

@ROBRENZ

2 жыл бұрын

Glad you enjoyed it!

I was waiting for this to come out one of these days! The premonition signs made me watch previous episodes yesterday :)

I think everyone would enjoy a monthly video from you.

Love to watch this channel and Stefan Gotteswinter. Real professionals. Thanks Robin looking forward to next video.

Thanks for the great tips Robin, your work is outstanding!😊

We have once again been blessed with a video, thanks a million Robin!

@ROBRENZ

3 жыл бұрын

Glad you enjoy it!

Thanks for making this video. As always...really great stuff.

@ROBRENZ

2 жыл бұрын

Glad you enjoyed it!

I absolutely love your videos. Very high quality, unique information.

@ROBRENZ

9 ай бұрын

Glad you like them!

Awesome modified Harig. Really appreciate your precision work 'process' videos, keep up the good work!

And now I go to my workshop knowing how far I am from Robin's level. I didn't think about the column growing due to heat...absolutely stunning. I look forward to watch some lapping content in the next video. As always, an awsome job Robin!!!

@davidwillard7334

Жыл бұрын

IT CLEARLY ! SWELLS !! UP !! LIKE !! YOUR !. BRAIN !! DOES !!

Unbelievable precision and care you have with your grinding processes. Just blows my little mind. Take Care and Stay Safe. Bob

I am very unlikely to operate a proper flat or cylindrical grinder in a future. (Well, I have built something in my small home shop that I am calling a grinder, for lack of better name.) Yet, I think I have lust learned a lot of very, very useful stuff and bunch of cool tricks. Thank you taking your time and slowing your work down for us to learn from you.

Before Robin, I never seriously considered thermal growth, micro inches, nano meters, millionths of inches etc... In my daily work if repairing construction equipment bearing and pin bores in the field if I hit may target within a thousandths of an inch with consistency using portable machine tools I am thrilled beyond belief! However if I consider some of this stuff while doing that work, for example the hot noontime sun warming up a frontend loader frame when my setup was done in the shade. It can make a difference in bore size and sometimes alignment. not a big deal in a slip fit for a pin, but a press fit for a bearing or series of bearings it can make a huge difference. Tool rigidity is another topic Robin got me to consider in depth too. Once again with a portable machine tool it's hard to achieve some days. I struggled with this for some years, not knowing why I was having troubles. Robins example and explanations caused me to have another look at this stuff in detail, do my own research and experiments. I have a lot less problems now, especially on sketchy set ups if I think about this stuff in advance rather than chase my tail once I start. Now none what I do has anything to do with surface grinding, but the same rules apply. And even in my day to day machining in the shop, i.e. building a tool, I get better size control and finishes when I think about this stuff. Not really necessary in my world again. But very gratifying to hit a number every time. Thank you Perfesser 🍻 (edit) Oh and I forgot Loctite products, Like many people I have used thread lockers and anaerobic sealers for year. But unfamiliar with some of the other products not knowing what they could accomplish if used correctly and using the right product. Black max comes to mind.

@ROBRENZ

2 жыл бұрын

Nice to hear these things are helpful Warren! ATB, Robin

checking in again :)

Was absolutely surprised to see the one part had a 50 millionth deviation. I was sure Robin was going to explain how he was gonna have to start all over.

That was so fascinating. My uncle was a tool and die engineer at GM and then opened a grinding service in upstate New York. I remember being in his shop and not understanding anything he was doing. I like to think he was doing work similar to what you're doing. Just fascinating how so many variables come into play to hold those tolerances. And those finishes, holy cow.

You are very generous with your knowledge. Thank you!

Just knowing such precise work can be done is a joy. Fascinating as always. Thanks

Thanks Robin always so cool watching your plan and execution

Fantastic! I have some weird compulsion to watch these videos immediately. Thanks for taking the time to make the video!

@ROBRENZ

3 жыл бұрын

Glad you like them!

Another great video! Thanks for taking the time to make this. I just re-listen to the podcast for within tolerance yesterday and was wondering about the next spindel video. So great timing ;-). And again a inspiration to improve my own work.

So amazing how many details there are to this stuff, thanks for posting this

I love the work you put into your surface grinder ! Beautiful work as usual Robin. Cant wait to see more!

Never-ending amazing tips. Loc-titing the heads of close fitting caps screws... ugh... so elegant it kills me.

Just insane! Awesome work man!

@ROBRENZ

2 жыл бұрын

Glad you like it!

Thanks for all your hard work making these fantastic videos, Robin! I enjoy them so much, and have learned an incredible amount from them. As opposed to many other YT machinists, you keep everything relevant, without too many eh's and uhm's, and you never fail to amaze me in the way you consider all perameters and details. Also very impressed with the creativity with which you set up a project. Love it! I've almost finished watching all your videos, so I'm wondering when you will upload more? If needed, I will watch them all again.

You know, it’s good that I get the opportunity to rewatch this so many times before the next installment. That way I have a chance to actually absorb all the wisdom before being drowned in it again. Seriously!

Missed ya Robin, thanks for the video. As always I really enjoyed it....

@ROBRENZ

2 жыл бұрын

Glad you enjoyed it Lance! ATB, Robin

Thanks for sharing Robin. Your work are amazing

im very excited for the hard turning, that has always fascinated me. it's amazing how we can cut hardened tool steel like that.

Nice job Robin!

@ROBRENZ

3 жыл бұрын

Thank you Steve! ATB, Robin

Beautiful work Robin, thanks for details, cheers, Doug

I've been waiting for this forever, woohoo!

cant wait for #3! hopefully sooner than later

Awesome video! Thanks for the knowledge 🙂

@ROBRENZ

2 жыл бұрын

Glad you enjoyed it!

Unreal, love the detail you go into awesome work rob

Impressive! I love your work.

@ROBRENZ

3 жыл бұрын

Thank you very much!

@toddcumberland132

3 жыл бұрын

@@ROBRENZ No, Thank you very much. I love them. I look forward to them. wonderfully thought out and executed. I look forward to the next one.

Robin, you are truly the badass precision king. Keep up the high standard.❤👍

Absolutely fascinating, thanks Robin! I can't wait to see the next installment

Trying to indicate something in within a couple thousandths is a struggle on the equipment I'm using. This is just amazing to see you dial these parts in to a thousandth of that. It's difficult to wrap my head around the magnitude of that.

I doubt I will ever have the chance to use any of this, but I really appreciate the detail you put into this art, and you help me understand better the Intricacies of Interactions in systems, which really applies to everything from physics to medicines and herbs, to emotional healing, and you describe it in an easy to understand manner.

@BernSha

Жыл бұрын

Adding - That you gave countless hours needed for the mastery of your tools and materials demonstrates a degree of commitment I seldom see, which seeing is inspiring. Sharing this commitment is, in my view an act of service. Bringing this kind of heart is applicable to any endeavor and, at some point, begins to reveal the underlying connections between all things. In that, we are all walking this path together. Thank you for letting light shine!