MAKING ULTRA PRECISION TOOLROOM SPINDLES #1

First of a series of videos on making ultra precision toolroom spindles. These are designed to have les than 0.000005" runout and very high stiffness. General design and machining before heat treatment is comvered in this video. (I said 75 divisions in the video, it is 72 divisions for 5 degree increments.)
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[@machineshopatthebottomofth3213]

I have just come in from the shed after making some bronze bearings. I was quite pleased with my work, until I watched this. I started to feel guilty that I had done a poor job, then I reminded myself that I was fixing a lawnmower!

[@ThisOldTony]

Stop it Robin, you're making the rest of us look bad.

[@fredgenius]

LOL!

[@ROBRENZ]

No one could make you look bad Tony! ATB, Robin

[@petr0rabbit]

i was actually looking for a new video from you and look where i find you, quit slacking already! :D

[@machinist7230]

Agreed - 5 millionths?! Im happy when I got within two thou the first piece off the Hurco...

[@randalkramer1432]

Tony you have lots of great things to offer too, when you’re working in millionths there’s no room left for corny jokes and fancy camera work. That’s the void you fill so expertly.

[@StefanGotteswinter]

The IPM (Informations per Minute) for this video is as usual incredible high. It might just be me, but I have to watch those videos multiple times, because I can not pick up all of it at once. Thanks Robin!

[@ROBRENZ]

Glad you enjoyed it Stefan! ATB, Robin

[@AmateurRedneckWorkshop]

And here I am trying to be accurate to 0.001". Thanks for the video.

[@prentissvise]

A big Thank You for taking the time to produce these videos. I have earned a living as a machinist for 32 years, it has been like getting paid for my hobby. There is so much I still do not know and so much I still want to do. You have been filling huge gaps in my knowledge along with getting me all excited about machining all over again.

[@ROBRENZ]

Thank you very much! That is very encouraging to hear.

[@ClockworksOfGL]

This video should be required viewing for every engineer. They need to understand the consequences of their arbitrary tolerance choices. Because there’s not much difference between 0.001” and 0.0001” for a guy who’s spent his entire career in front of a CAD program, but that extra zero makes a HUGE difference on the shop floor.

[@michaelpeabody5625]

As an Engineer I can't agree more. I was lucky to have a machine shop in my first job and Tool Makers willing to teach me!

[@andersjjensen]

I don't know why I find it so satisfying to watch someone go complete space cookie on the art of precision.... The most precise tool I use myself is a kitchen knife! :P

[@rdp316]

Thanks for explaining the idea of the counter drill in the tapped holes. I can’t wait to see the finished product!

[@oxtoolco]

Can't wait for the next installment! You have been using these spindles for about a year now so I'm guessing next summer on video #2? All the best, Tom

[@ROBRENZ]

LOL... well played Mr. Wizard! Haven't touched them since you saw them back from HT on IG when your parts went along for the ride. Had thought that I would wait for the Mitsui to be done to finish these but since the Harig will be full auto shortly its time to finish these up. Unfortunately with my history your timing prediction might prove accurate or worse :-( ATB, Robin

[@0verboosted]

@@ROBRENZ you're forgiven Robin as long as we get some meatloaf from Tom in between @oxtoolco

[@g.tucker8682]

Good call, Tom! Part 2 posted just before Labor Day 20201. :)

[@blob_87]

The first two minutes of this video contain more knowledge than every other machining video on youtube. Holy crap.

[@lgl_137noname6]

Man, precision machining brings together mechanical engineering, material science and metrology into a single application. Fascinating !!!

[@SteveSummers]

Really like the CG tip. That makes perfect sense. Thanks Robin. Great work as always.

[@ROBRENZ]

Glad it was helpful Steve and thanks for stopping by. ATB, Robin

[@dizzolve]

4:45 so that's your advantage .......... 3 hands. I knew it!

[@par4par72]

That's called "...Wabi Sabi...". The art of imperfection!

[@kmpnelson]

Excellent! Honestly there's knowing what you're doing machining, then there's what you do. They're worlds apart. Keep reminding us to subscribe via patreon! I forgot until now and am more than happy to throw some money in the hat to keep these kinda of videos coming.

[@cylosgarage]

This made my week. Literally just starting a precision spindle build myself, so many nuggets here and surely more to come. I can't even begin to thank you enough for your wisdom.

[@RGSABloke]

As a complete engineering idiot, I try not to let my brain explode when I watch your content Robin. What your channel does for folks like me is let me dream that one day I would/could have a slim chance of producing such quality, and please believe me I am not trying to blow smoke up you know where😳. Watching and listening to your videos gives clear reasoning and rationale for your decision making processes. (To the Nth degree). As has been said before (I,m sure). ‘LEARNING LIVES HERE’. Kindest regards. Joe.

[@ROBRENZ]

Thanks Joe for the kind words.

[@darrenblattner2508]

Are you sure you want to use that? Looks like a work of art that should be on display. Cool video Robin. Keep smiling.

[@kurankerim798]

Xxxxx,xx

[@kurankerim798]

Xxxxx,xx,

[@Max_Marz]

Only 1:30 in and already utterly speechless. I learn so much from you every time you post a video that I have to watch it twice. The first watch through I'm double face-palming in epiphany the entire time just listening. That bit about the V block influence was so incredibly dumbfounding, you can imagine that you think of everything as rubber, you can think you have a good handle on it but just taking that little standoff and sticking it under the block takes forty years of experience to do.

[@randycort3142]

Nikola Tesla, John M. Browning, Kelly Johnson, and Robin Renzetti, all geniuses in their field. Thanks for sharing!

[@greasydot]

Watching you do things like this makes me just want to go back to being a welder and sell my machine tools for scrap. Amazing work sir.

[@forrestaddy9644]

Nice presentation. You explained very well the need for the meticuloius checks and re-checks at each step. You missed an alternative calling that I think I mentioned before: teaching - passing the lore to the next generation. "Elastic averaging." Suddenly a whole approach to refinements in precision design gets a label. The language of precision requires apt words and phrases to label concepts and components like 'repeat zero," "re-referenceing," "closing the loop," etc both as a means of efficient communication and as tags for the individual's technical memory. A colleague need mention only the word or phrase for the concept and the implications of the moment to unfold in the mind's eye like the blooming of a flower. Makes me wish I was back making chips.

[@ROBRENZ]

Thank you Forrest for the very kind words. It's very comforting to have someone with much deeper and wider experience concur with the things I present. ATB, Robin

[@3dmakerzone75]

Your attention to even the smallest detail always amazes me. Even though I just a retired computer nerd using my skills to command CNC machines to makeup for my lack of machining skills I often ask myself "What would Robin Do?". Then I pull out my caliper and try to get the same reading twice on the part I made. But I still love watching your videos.

[@DanielReetz]

Loved the comments on elastic averaging and the spindle nose aesthetics are as cool as can be - plus functional. Well done. Thanks for sharing with us all.

[@ROBRENZ]

Glad you enjoyed it!

[@st3althyone]

Your attention to detail and precision are unprecedented Robin. As always, it’s a joy to watch your work, excellent job!

[@shawnhuk]

Wow, the lack of a thread relief causing that blow out on the hardened steel blew my mind! Neeeeever would have thought the steel would have cracked and flaked off like it was a piece of porcelain.

[@Saki630]

I like your videos because you teach things as you show off your tools and skills. I dont even turn a nail, but i watch these. Keep it up!

[@ROBRENZ]

Glad you like them!

[@nocturnhabeo]

I rewatch your videos pretty regularly it's just calming to me to see the level of precision you use and dedication to quality you have. I don't imagine it's easy to do all that and make videos but I'd like to see the finished results from these spindles if you have it.

[@yawpaw9796]

You are a master, by far the best machinist alive. This is why i love to joke around your ways, you are perfect or scrap.

[@DanielHeineck]

Robin -- thanks a million for sharing. Not only the big details and design, but the little tidbits along the way. It's greatly appreciated.

[@slausonm]

Every time I watch one of your videos I pick up information I can apply to something I do. Thank you for another wonderful video.

[@johnlockesghost5592]

Me: "I'd really like to get a lathe and learn machining" Me after watching this: "it's going to take 10 years just to get an understanding of how much I *don't* know"

[@cobraframebuilding]

I can't thank you enough for the time and effort. Thank you so much.

[@first_namelast_name4923]

Thank you for slowing down your work so that you could film the process for us. Your videos are usually very good, but this one seems to be exceptionaly well edited. Not that I would complain if it was 2 times longer, I like your running commentary. I always learn very interesting stuff. I am looking forward for the next installment.

[@bid6413]

Robin, Thank you for your time and effort to share not just what you are doing but why. Always interesting and a pleasure to see your work.

[@billlee5307]

Extraordinary tooling design, and fabrication. Thank you for taking the additional time to make this video.

[@jeremydoblinger3609]

Your son is lucky to apprentice under you for sure..big leg up for the young man.

[@ReubenSchoots]

Finally got a chance to sit down and watch this. A real pleasure, as always. Always learn a thing or 5 from your content. Cheers! 💪👍

[@ROBRENZ]

Glad to hear it!

[@agusdrummer]

On a whole different level. Thanks Mr. Renzetti

[@Southardknives]

That was fantastic! Can't wait to see them finished!

[@ROBRENZ]

You and me both!

[@Jeff-or6vd]

These are some of my favorite videos on the whole of the internet. Thank you for putting your time into them.

[@ROBRENZ]

Glad you like them!

[@spartafly3014]

Fantastic, absolutely stunning! Thank you so much for sharing your amazing knowledge!

[@0verboosted]

You’re saying words I’ve never even heard of before - trilobular shape?? Haha great work again Robin really enjoy the high-level of precision and the effects of tiny forces on the accuracy of tools like this. Really interesting to watch some of the demonstrations you’ve done on the effects of even just body heat on calibrations.

[@Gkuljian]

I thought I was a machinist until now. After reading the comments I don't feel so bad.

[@opuak]

Mind blown, again, I love your videos, your experience in what you do... I learn something every time :)

[@djberg3483]

Excellent as always Robin, thanks for taking the time, and educating us lesser machinist and engineer types.

[@Foz9852]

As an apprentice Toolmaker, wish I had people like yourself in my shop. Looking forward to pt.2

[@literoadie3502]

Never clicked so fast! Thanks Robin, can't wait to see the rest of this. I saw these on your instagram a while ago.

[@user-tw9io9nz2m]

Thanks for the reminder that I need to make adjustable chuck back stops. That aside, I always learn some new things when watching your videos. That’s why I (and most others I think) keep coming back video after video. I’ll be re-watching this in a little while to properly digest all the valuable information in this video (like all the others you made)

[@toolbox-gua]

This is mind blowing for me. Absolutely superb!

[@cooperised]

I'm an electronic and software engineer, and hobby machinist, so I have zero chance of ever having the skills or equipment to make something like this. Still found it fascinating. Something to aim for...

[@jasonbell5905]

Very nice informative and clean work, it’s so cool you share these projects with us!

[@Engineerd3d]

Had to watch this twice. Enjoyed it. Thank you for the lessons. Lately, between you, tom lipton, and joe pie i have been learning a ton.

[@davidmurray700]

THANK YOU Robin for sharing! Always a pleasure to be reminded about attention to detail and the thought process from you. Looking forward to seeing you lap the bearing faces parallel to each other to probably within a few millionths.

[@Just1GuyMetalworks]

Wow 😀! I'm happy when I can drill 4 holes in a straight line 🤣. That's some next, next level stuff. Beautiful work as usual, thanks for the share! Cheers 👍😀👍

[@paulmace7910]

Wow! Can’t wait for the next installment.

[@DudleyToolwright]

Robin, always another level. You make me feel like less than the novice that I am. In a word, wonderful.

[@bcwrangler]

Fantastic work so far Robin...looking forward to the next video!

[@than_vg]

This was one of your best Robin, can't wait for the next one. The effort you have put in documenting this for other to benefit from is highly appreciated. Sincere regards, Thanos

[@bryans5150]

Dammit! Once again guru Robin put me to bed a human being with useful knowledge... Thank you Sir!

[@st3althyone]

Always pleasure watching you work Robin, your videos are done to perfection as is all that you do. As always, thank you for taking time of your busy schedule (which for someone like you, is precious) to create this content for those of us looking to learn something new the right way. You are a godsend and I’m glad your work will live on in the internet for as long as we live as a civilization and don’t destroy ourselves with those idiots at the top making stupid decisions. As always, take care of yourself and I can’t wait for the next video to drop.

[@giorgiocanal1659]

Watching this video another time (how many times now? Who knows...) before watching the second episode just released. Every time I watch it, I get new info from. THANK YOU!

[@hashgeek929]

I love seeing all the amazing custom tooling and fixturing (art, really) you create in your videos. The tooling @ 4:47 tops them all, and you use it just to hold a splash/dust guard!

[@maxbray9124]

Robin knows a thing or two about a thing or two, refreshing after watching all the pan handling self proclaimed machinist

[@pierman69]

I'm always so impressed when I watch what you do. Very good work Robin

[@AlwaysSunnyintheShop]

Wow Robin, you never fail to impress! ----Aaron

[@user-gy4pm3zi8k]

It's really cool! When I saw what it would look like at the end,I really want to try to build one myself.Thank you very much for sharing.

[@mxcollin95]

You should be a college professor of graduate level machining. Your work and knowledge is incredible.

[@ROBRENZ]

Wow, thanks!

[@kellymoses8566]

First time I have ever heard the term "elastic averaging". You really know your stuff.

[@chrisj4570g]

Sleeps over rated, time for a new Robrenz video! 👍

[@eugencsl]

Outstanding work, far away from the work i do but love to see this level of machining. All the best and looking forward to part 2 👍🏼🙏🏼

[@akfarmboy49]

I see lots of your tooling at work. I store your ideas for upgrades to my shop. Thank you for willing to show your trade secrets

[@davidcolwill860]

Excellent as usual! Looking forward to seeing the lapping and the bearings.

[@stevensmart8868]

Nice work Robin. I always learn something from your videos. Temp super glue parallel is a gem. Love this build

[@rgbrown90]

THE WIZARD🧙‍♂️ skookum as always Rob!!! Thank you for your precision!!!!

[@aaronbaird3533]

Really enjoy learning the thought process that goes into your projects. Extreme precision is fascinating, but it takes a lot of cash.

[@tombellus8986]

Top of the heap !!! Thanks for sharing, Stay safe.

[@surinderdhiman]

Amazing precise workmanship with a lot of ideas 💡 👏

[@vincei4252]

Excellent video, Rob. Was about to login to work to start my work day but this truly took priority. Making tangible accurate things is the root of everything in our modern world. Makes me look back over my years of noodling away developing software applications and systems and wonder whether I should have gone the route of making tangible things instead which I truly enjoy. Thanks for sharing.

[@niallmartin4098]

As always another absolute masterclass. Such amazing attention to detail. Robin you're work is inspired and inspiring.

[@ROBRENZ]

Many thanks!

[@fredgenius]

Nice! I definitely got some takeaway from that, keep it coming!

[@LogicIndustries]

New RobRenz! Oh boy oh boy oh boy oh boy oh boy oh boy oh boy oh boy oh boy oh boy!

[@postiemania]

Well done and I appreciate your skills.

[@alexcroteau8726]

Excellent video Robin. I was actually thinking of this project this week and to wake up to this video was a treat! Glad to see some apprentice hands on the harig ;-)

[@outsidescrewball]

Awesome discussion/demonstration/build....thank you for your time to share...atb

[@anathaetownsend1894]

Thank you for the video Robin. Learned something as per usual.

[@Pobadill]

A national treasure defines you

[@ReubenSchoots]

Will be making time to watch this tonight!

[@jamesrandalls6914]

man that was over quick, thanks again

[@JeffCowan]

Robrenz on a Monday night? Right on!

[@lancebaltzley4770]

Amazing!!!!!!! Thanks Robin!

[@dannymaciejewski]

You almost got me with the compound joke Robin! 😂😂 That was solid

[@MF175mp]

Awesome stuff again Robin.

[@FCleff]

I have so much to learn. Thank you.

[@joell439]

Robin, thank you so much for interrupting your usual workflow to breakdown and share with us some of the most incredible precision machining. Your ingenuity and precision execution is endless 👍👍😎👍👍

[@ROBRENZ]

Glad it was helpful!

[@HH-Machining]

Love your videos! Alot of useful tips and tricks :)

[@seantap1415]

I enjoyed this very much. Cheers.

[@longlivepunk]

Beautiful work as always, Robin!

[@ROBRENZ]

Thank you so much 😀

[@billrees4638]

Robin, Thank you for another video, you do help me to think outside of the box...Or that the box is bigger then I thought

[@miamatti]

As my eastern block materials professor says..."It must be Absolutely precise!"

[@wlogue]

Nice, thanks Robin!