MAKING A BETTER ADJUSTABLE TIR LATHE CHUCK

[@StefanGotteswinter]

Robin, such a clean design - Love the super close fit fine pitch screws. Thank you so much for taking the time to film and share this design.

[@IGBasov]

Hi, Stefan. Thanks a lot for your video. Especially about scrapping. Helped me a lot.

[@ROBRENZ]

Thank you Stefan for watching! ATB, Robin

[@tonywilson4713]

Actually Stefan without a couple of the vids you have done on "cost effective" chucks parts of this video would not make as much sense as they do.

[@Brrraaack]

@@IGBasov Stefan helped a lot with dieses verschrotten :D

[@Engineerd3d]

Had to push out watching this video until I had enough time to watch in one shot without distractions. lovely work as always Rob

[@ROBRENZ]

Thanks for watching!

[@oxtoolco]

I especially like the re-purposing of the socket head cap screw! When you started talking about the elongation of non-homogeneous constituents and the grain structure of the material in the direction of working during forging I really got excited. Bravo! All the best, Tom

[@ROBRENZ]

Thanks Tom, those SHCS really machine beautifully and are way cheaper than 17-4. At 170ksi yield strength for 1/2" and below, they are tough to beat. ATB, Robin

[@tonywilson4713]

@@ROBRENZ I've seen other people make things from bolts but never to make a part like this.

[@psykosis101]

​@@ROBRENZ for Tom to get excited about materials science you must really be doing something special!

[@Garthinyus]

Ditto what everyone else said! You are a treasure and a blessing!

[@rustygardhouse7895]

Wow! Dan Gelbart. That's a name I haven't heard in a while. I worked at Creo when it had 150 people. Dan let me have access to his library of precision design texts. Learned buckets from them. Enjoy your posts!

[@Trent-tr2nx]

If you aren’t aware, Dan has an incredible set of videos on KZbin, one detailing his air bearing lathe and others showing his absolute dream of a home machine shop. Were there any precision machine design texts that you’d recommend?

[@cylosgarage]

@@Trent-tr2nxI’ve got a video on my favorites, but I’m not Dan gelbart

[@dominicmolloy561]

A new Robrenz vid. The holy grail of KZbin machining.

[@misterwilling]

You ain’t lying

[@DavidBaumgarner]

A new Robrenz vid. The holy grail of KZbin, period. 👍

[@summerforever6736]

For sure!

[@T1nCh0]

Babe, wake up, Robrenz uploaded a new video.

[@macsmachine]

Perfect comment. 😂

[@brucethom4957]

Spent the first 12 years of my career as a toolmaker, specifically mold making. Spent the last 27 years applying the skills and techniques learned and that you are documenting of precise toolmaking techniques. It’s amazing to me the tools we make do with - fixtures and machinery, that were never thought out to the level of precision that toolmakers demand. Keep up the good work, and the awesome documentation of our trade!

[@ROBRENZ]

Thanks for sharing

[@cyrucom]

Not a criticism at all, but sometimes I watch your videos to fall asleep to 😅 I figure maybe I'll learn something even if I fall asleep mid video lol, subconsciously. Love the chuck idea!

[@EricBrummer]

If only we could clone Robin and fill a university program with him instructing. I wish even half my instructors were as skilled, knowledgeable and capable of communicating this effectively. Always fantastic useful content.

[@ROBRENZ]

Thanks very much Eric and thanks for your undeserved continuing support

[@Garthinyus]

Hoping you and yours are well this season, God's blessings on you all!

[@robbourns2831]

Robin, you truly are the goat when it comes to this stuff. You should have millions of subscribers just off the knowledge you have and all the little gems you throw into each video. I have to watch your videos multiple times to catch them all. I very much appreciate you for all your hard work, especially for putting this all into a video for us to watch and learn.

[@Watchyn_Yarwood]

Agree 100%

[@priority2]

Amen!

[@kennyl4510]

Robin. Thanks for your patient kind and considerate manner. You're an educator and a great mind. Cheers Ken

[@dexiedude]

Robin, I design custom chucks and tooling and I must say, your videos are always insightful and I love watching them to learn new tips and tricks for improving my designs. Thanks!

[@ROBRENZ]

Wow, thank you!

[@jimsvideos7201]

Once again I feel like a half-wit freshman who wandered into a grad class, but even I can learn a few things for today and a lot of things to look forward to trying in the future. Thank you very much for all the time and wisdom you've put into this.

[@uncleTedLol]

Robin, you are truly brilliant. Thank you for revealing the why's of your design choice - extremely valuable insight for those of us learning the art of engineering. I can not express my appreciation for being able to learn from you. This chuck is second to none, which seems to be a standard for your work.

[@richardhassett8827]

Watching your work is a type of religious experience. Thanks so much.

Would it be better? if we cut a little step on the out side edge of the adjust screw then engrave the division marks on another ring and gentle press fit it to the screw. Just fit enough so it not turning around but we still able to adjust it. Because the thread with move a little bit over time so those marks wont always stay on the same spot as we want. Just my thought, not trying to be smart 😅. I got no more word to say about your works but still have to comment.😅

[@ROBRENZ]

That would be a nice enhancement. I figured I can put a shim under the screw heads before the hardened race goes on if I need to tweak it for wear. Thanks for watching and commenting Cà Lem, Uncle Robin

[@psykosis101]

As a hobby machinist, a lot of what you are going on about is way above what I FULLY understand, but you relay it in such a way that doesn't make me feel like a complete idiot and that is very much appreciated. Keep up with the excellent content, it's greatly appreciated

[@Watchyn_Yarwood]

Very well said!

[@homemadetools]

Great to see you back in action. We shared this video on our homemade tools forum this week 😎

[@ROBRENZ]

Awesome! Thank you!

[@floodo1]

That shot with the giant orange c-clamp and the indicator coming through the bore was the most mad scientist thing I’ve seen on this channel hahaha As usual, thanks so much!

[@idpromnut]

Today was looking to be a soul-less day, full of software design and problem solving for me. Thank you so much for lighting up my day with your precision design, manufacturing and assembly of cool things!!! :D

[@StraightThread]

Wow! It was a pure pleasure to watch this video. There is something magical about the way you share your rich, brilliant insights. Thank you for sharing.

[@ROBRENZ]

Glad you enjoyed it!

[@nowar9220]

The quality of parts/work that gets cranked out on this channel is top fkn class!! Gives us a real insight into how engineering actually practically playes out when high tolerances are required! Even tho i have done some highly accurate work myself ik constantly suprised and learning new things with ROBRENZ!! LOVE IT!!

[@Designments]

I'm grateful every time you post! Your video on spindle bearings guided me to design and construct my own spindle for my Quorn tool grinder protect using DB ground bearings. Thank you! I know I'm not alone in appreciation of you sharing knowledge.

[@stefankargl]

Hello Robin, my comment is not specific to this video. I just wanted to thank you for sharing your knowledge and especially your thought process during your projects. When I first found your channel (Stefan Gotteswinter recommended you) I basically did not understand anything you explained or did ... it just was way to advanced for me. Well the virus caught me and I bought a lathe, mill, surface grinder, d-bit grinder, and lots and lots of tooling. Basically watched all the videos from Stefan, Tom Lipton, Joe Pie, This Old Tony and so on (sure I forgot some channels) and then again stumbled upon your videos and finally managed to understand most of what you said. Its a real pleasure to watch your videos and I learnt a lot by doing so multiple times ... even if machining is just a hobby to me it has become an important part of my life for me and thats mainly because of you and Stefan. I think you are improving the life of a lot of people. Keep on turning :-), ATB Stefan

[@MachiningandMicrowaves]

Another gold standard project Robin. I sometimes use those high-tensile socket screws as stock for making parts, I hadn't thought that having forged heads would make them even stronger. So many insights in your videos.

[@pupperozucca4994]

Rebrenz, I am an electronic engineer and I understand only 50 to 80% of what you are saying. The main reason I watch your videos is the passion and the motivation you put in your job. It inspire me in what I have to do. There is only way to get stuff done: pure and crystal clear perfection... or at least always try to.... Many thanks from Italy

[@durangotang1681]

I’d like to send a big -thank you- to you for spending so much time over the years teaching the internet awesome things. I spent seven years at a shit job soaking up all this info 8 hours a night and built my own cnc shop at home a few years ago. I learned enough from people like you to finally score a CNC machinist job which is damn near unheard of in my area. Starting a LLC this month also in hopes of putting my own products out in the world. So thank you again friend. P.S it’s probably your fault the boss kinda got at me today and told me not to make a masterpiece out of every part and “just debur the damn things!” Was running the mill, cmm and deburing simultaneously. Got a little in the zone. But they Rob Renz smooth, better believe it.

[@DavidBaumgarner]

When you take pride in your work, customers notice.... Your boss needs to remember that. ( or maybe he hasn't learned it yet, but im giving him the benefit of the doubt here. 😉 )

[@ReubenSchoots]

Robin, That was awesome, in the true sense of the word. So many bite sized pieces of knowledge. Thank you for your willingness to share every important detail from start to finish. Your dedication to both your work and educating others is inspiring. Kind regards and best wishes, Reuben

[@ROBRENZ]

Glad you enjoyed it!

[@joell439]

Impressive as always - so much going on. I think I may need to watch this several more times to force it all to sink in 😁. Thank you Robin.

[@douglashank8480]

I first heard one of my favorite phrases a few years back; from Stefan - though I'm sure others have used it too: "Giving it the Full Renzetti." I can think of no higher compliment to anyone who makes or improves a tool! Thanks for taking the time to show amateurs like me just how excellent the toolmaker's art can get with years of practice and careful thought.

[@douglashank8480]

I find myself wondering something: If you didn't have a business to run, and who knows how many other commitments to take care of, and you wanted to make a tool with no other purpose than to test your own absolute limits of precision in toolmaking, what would you make - and why would you choose that tool?

[@ROBRENZ]

Thank you for the kind words!

[@ROBRENZ]

The toolroom spindles I have partially competed on YT is an example.

[@matthewwest8689]

Very cool design and some great tips. I’m adding this to my list of shop projects. Thanks for sharing Robin, as always very educational.

[@agusdrummer]

Put the kids to bed, kill the phone lines. Brace yourself for a proper learning session. Robin, the way you integrate planing and execution, theory and practice ist just wonderful and so accessible that it always makes me believe I could achieve something within this realm of precision. Of course there's it's only wishful thinking still. Thanks a lot professor.

[@737mechanic]

Very nice. Always enjoy watching you work.

[@mftmachining]

Robin, your skills and experience are second to none. My deepest respekt. TOP.

[@ROBRENZ]

Thanks for the very kind words!

[@EZ_shop]

Amazing work.

[@Cmtb125]

Where has this KZbin channel been!? How have I not been here before ? New sub…. Lets go!! MACHINING FOR THE WIN!

[@larrykent196]

Buck chucks are good tools to have. I have seen the distortion you have shown, my approach has always been to loosen all the adjusting screws and move only the one I need to move it in the direction I needed it. Then loosen it again and adjust the others as necessary until I get it running as needed. Always loosen them after adjusting them. Once the chuck is adjusted where it needs to be I snug up all the screws, one side then the other mindful to be deliberate to not skew the results.. Do this to secure the chuck in position being careful to avoid distorting the chuck while maintaining the concentric adjustment. Done it this way for the past four decades I machined and always teach others this method. This method works well and is quick. Nice chuck you have masterfully built thank you for the video.

[@TheAyrCaveShop]

Wow Beautiful.. Fantastic design and detail.. Thanks for sharing Robin.. 👍👍

[@DudleyToolwright]

Another Renzetti tour de force.. Thanks for the lessons.

[@dariodalcin5177]

Such a knowledgeable and skilled man. Teach me how to do life

[@michaelmiller5566]

It's very easy to listen to you explain Your processes for an hour. Your thinking process is Incredibly thorough.

[@dpmachineworks]

Beyond impressive as usual!! Thank you so much for sharing this informative video. Appreciated more than you know!!

[@ROBRENZ]

Glad it was helpful!

[@bobfugazy4916]

Chuck, my pimp. I had to say it. Awesome video Rob. Thanks for sharing.

[@Orgakoyd]

Thank you Robin for taking the time to film and edit these super high quality videos! Both the content and the video quality are second to none! I really love the matching ground step height for the back plate, and the pressed in stiffening plate made such a difference. I never knew about the long bolts from the front vs short bolts from the back design detail so the bolts can flex and not impede the skidding. I think of the bolts acting like flag poles in the wind.

[@theodoreshasta7846]

Your work is carefully thought through and masterfully executed. It was a real treat to watch this video. Thank you!

[@craigs5212]

Robin, glad to see you back! Very nice project love the use of the cap screw as raw material, a nice reason not to chuck out old bolts. Thanks Craig

[@ronkellis769]

Pending watching the whole post, THANK YOU and a special note for showing where you are going first. Bottom line up front is US Army writing, and I often go all the way to the end of a KZbin posting to see where they're going before I decide to watch it. Kudos!!!!!

[@josephlovell6951]

I was just watching some old video of tour last light. Thinking I miss Robin... I know you are busy. So thanks for taking time to melt my brain. God bless

[@edpopelas2844]

Robin the thing I enjoy most about your channel is the mindset that you can make something that would be considered standard “ho hum” and refine it to make it top notch.

[@kevinreardon2558]

And another episode of ROBRENZ where I have to stand on a chair so it won't be over my head. Thanks ROBRENZ, I always enjoy and amazed by your content.

[@joeblan9426]

Merry Christmas to You Robin and your Family!

[@ROBRENZ]

Thanks, you too!

[@warrenjones744]

This is like next level coloring outside the lines. Outstanding Robin. I do so enjoy watching and learning from someone who is really really good at what they do no matter what their discipline may be.

[@ryanvanderpol7962]

Thanks for showing the end product and use at the beginning - helps me follow the build process. Fantastic design and craftsmanship as always!

[@PeregrineBF]

Great video and cool design. Also good to call out Gelbart's chuck, he has a lot of cool designs.

[@LarsLondian]

Very nice demonstration and build upgrade, Thank you for sharing. Appreciated you sharing the information about the surface grinder and alignment, I don't currently have one, but perhaps someday. Take care L.L.

[@gallogollo1141]

I am going to order one of each from shars, chuck, adapter, and test indicator just because I saw it here. I see therefor I do.

[@andersjjensen]

YAY! My favorite machinist goes space cookie on precision again! I am consistently amazed at how "wrong" my natural senses are about the world around me. My senses tell me that stone, big lumps of cast iron, etc are mathematically rigid, and it is SO intriguing to come along when you break down all the directions in which force is applied to make everything flex like jelly. I'm also pretty proud that, having watched all your episodes, I now have a pretty good "hit rate" on guessing what you're about to address. I totally called it on the amount of stik-out of the back plate in the vice as you were about to machine the opposing edge.

[@LikeFactoryMade]

Its a holiday for me every time you release a new video. I think your statistics will prove that most of us did not skipped a second. Thank you for being an inspiration for me and others like me!

[@joshwhite6947]

Wooohhh new robinZ. Damn neer wrecked the truck. Yeah I watch KZbin and drive. Traffic is dead slow. Roun here. 👆🌍✌️

[@ceesweerheim990]

The effort in detail design and consideration is truly amazing! Thanks for sharing

[@сашапашп]

It's so nice to see you again! Every new one video of yours is a fiesta!))

[@sshep7119]

I have wanted to add thousandth scales to my chuck for years, I just never did it. It is still going good to sit far down on my to-do list but I am glad to see someone do it. Nice to see a new ROBRENZ video.

[@sshep7119]

Just wanted to add this in here, I am not challenging or claiming that you are doing anything wrong here. When I did my tool and die apprenticeship ship I was taught to NOT clamp anything with the 4 opposing screws and that they are just for pushing the chuck body around. I was told to back off the face screws one half turn each, push the chuck body until the part was running true, re-tighten the chuck face screws then just ever-so lightly tighten the 4 jack screws. Not to apply any holding force, more so to keep them from walking out during cutting. The back side of the chuck and the face of the mounting plate that make contact with each other are lapped together for a true contact. I have been doing it this way for years and never had the slightest indication of wear or issue.

[@ROBRENZ]

That is an excellent procedure!

[@first_namelast_name4923]

Thank you letting us to look over your shoulder once again. Highly informative video.

[@rocksolidhugo]

The only channel I "thumb up" before even watching the content. So happy to see your always-amazing-over-thinking back. Thank you ,sir.

[@RSPFactory]

"I'm no expert at this" (57:30) The only lie Robin has ever told...

[@davidcolwill860]

Excellent! Thank you for taking the time to show all of this. Like many of your videos, I am sure I will be returning to this. There is always more to learn.

[@сашапашп]

And still waitin for next video of precision toolroom spindles.. Will be also interesting to see common work and tasks for such spindles in workshop)

[@davidandrews8566]

Excellent stuff. Educating and entertaining all rolled into one.👏

[@pierman69]

Impressive as always, thanks for sharing Robin!

[@summerforever6736]

Rob is a Profectionist!!! I Love it!!!! Well done Again SIR!!

[@EPaulIII]

Some years ago I have converted a 6" chuck to make it adjustable. It is a good conversion and I apparently unknowingly avoided the flexing of the chuck body, at least to a large extent. But now, after watching this, I will probably re-visit that to see just how good or bad my design is in this respect. His point about the front of the chuck bowing out, making the jaws "bell mouthed" is a very good one. And his method of reinforcing that is excellent. I mention my experience because, when I say this is an EXCELLENT conversion and video, I want everyone to know that I do speak from experience. Robin has considered and apparently successfully tackled so many more issues that come with an inexpensive chuck. My hat is off to the master! Yes, thank you very much for the excellent conversion and video.

[@ROBRENZ]

Thanks for the kind words!

[@mickymondo7463]

An absolute masterclass, not much else I can say really I enjoyed watching and your simple explanation makes it a pleasure. The old lead mallet seems rather Neandathal now 😂

[@FCleff]

There is so much valuable, innovative information packed into this video, I don't know where to start. I built a chuck stop for my 9" SBL based on your design shown at 23:00' and it really is incredibly useful. I'll be thinking about Making A Better Adjustable TIR Lathe Chuck next. Thank you very much for sharing your experience, wisdom and skill. Cheers, F.C.

[@Bob_Adkins]

Great video Robin! I think of you as the Dean of machinists! More please!

[@MrPossumeyes]

Gotta say, Bob, Dean? I think Robin might be Professor of Machinists. I'm a dead tree guy but look to this feller for accuracy guides, and ... well..... what can I say?

[@gyrogearloose1345]

Thank you very much for this Rob. Most enjoyable and totally gripping! Wonderful cinematography and piles of mechanical wizard tips and tricks. Your approach to the work is very inspiring. I wish good fortune on all your projects.

[@907jl]

Thought provoking and educational as always Robin. Thanks for sharing!

[@rossilake218]

Hey Robin! @ 49:53 you spoke of the twisting and flex forces on your stick-out piece. We-all have this problem. Where are your HD extended jaws for the Kurt vice? Half-ass Ross uses his often in his 2 car machine garage.

[@wheelitzr2]

Even the most experienced machinist will learn something from this video, I learned a ton!!! Thank you!!

[@ROBRENZ]

Glad you enjoyed it!

[@garysgarage101]

Gee Robin, you and Stephan go NASA level on all your projects. Out of this world amazing work you do! How about a 'back to earth' version next time lol.

[@James-fs4rn]

👍So much tech info being shared, had to watch it a few times to keep up as always. Your mechanical wizardry sharing is truly appreciated. Thank you!

[@SolidRockMachineShopInc]

Great job Robin!

[@ROBRENZ]

Thanks Steve and thanks for watching ATB, Robin

[@nraynaud]

the shot with the laminar flow coolant is an interesting window into the toolmaker subtle flex culture :)

[@charlieromeo7663]

Well worth the wait, Robin. You continue to impress.

[@canonsonico3752]

The fact that robin gets to upload new videos stomp me everytime. Im like "robin is gonna b da first man to make chips in space"

[@edwardnotebaart5268]

Was watching your videos! Very impressive to say the least. Keep up the amazing work, thanks!

[@ROBRENZ]

Thanks, will do!

[@EdgePrecision]

Robin, Really interesting video. Most all of the set-true chucks I own don't even have the adjusting screw at 90 degrees apart as well. This makes the even more difficult to adjust. You seemed to have solved most all the problems with this type of system.

[@StefanGotteswinter]

Have you ever used one with the 3 tangential screws? Those are hideous - No feedback of whats going on what so ever :-(

[@EdgePrecision]

@@StefanGotteswinter I have one small 6" one mounted such that I use it on the live center of the Mazak. I have shown it in many videos. I think it may be a Bison brand. This chuck has its four screws two around 60 degrees apart then another pair around 60 degrees apart 180 degrees on the other side of the chuck. So they are sort of two sets 180 degrees from each other but the two sets are spaces 60 degrees apart. This chuck is one of the most difficult to adjust the run out. As well it sufferers from all the problems Robin mentions in this video. So if I tighten one screw on one side it troughs off everything else. I have taken to adjusting one screw for my indication. then loosening it and just snugging it. Then going to the next, and so on. Making sure I never leave any of the screws tight. So to start I loosen all the screws and adjust each and loosen each till I get the run out then lightly snug each hoping that doesn't disturb the run out. I would rather it was a 4-jaw chuck. It would be faster. I may look into that. But to get a small 4-Jaw with changeable top jaws. That may be hard to find. I may have to modify a existing chucks master jaws for that.

[@ROBRENZ]

Thank you Peter and thanks for watching! ATB, Robin

[@assyholey4224]

@@ROBRENZ I have an old combination 3 jaw chuck scroll and independent. has SSS stamped on it. 2-inch throw hole I think came with my GISHOLT #4 torrent lathe, but I can't find anything out about it I don't use it I use the Gahlot 3 jaw scroll with a dozen different teeth it came from Quincy compressor plant years ago.

[@Goodwithwood69]

Please post more !

[@wjenkins96]

I’ve watched a lot of your videos that I know I will never be able to do. But cleaning up the chuck for safety is something I should’ve already done. Just pulled my chuck off and got my jaws out to work on that.

[@mpetersen6]

Excellent idea I did someyhing similiar for use on 4 jaw chucks. Only without the graduations and working on the Z axis. We had common jobs that involved indicating faces on parts. As most 4 jaws have tee slots l used the appropriate size tee nuts and hex head screws. The hex head was then tapped for a fine pitch screw. The jack screw could then be used to move the face of the part around. Much better than using a soft hammer or pry bar. The jack screws made things controlable.

[@thomasdickey356]

Great video Robin, I learn something from you every time.

[@KrakenGuy]

Robrenz is a wizard.

[@jasonh3109]

Another gem! Wow. Such amazing thought and care goes into everything you do. A true master of the trade. 💪🏾Thanks for sharing with us all.

[@than_vg]

thanks so much Robin, please know how much your efforts are appreciated!

[@stevensmart8868]

Thanks for the video Robin. Amazing work as always.

[@johnspargo5876]

Always special. Always excellent. Kind regards from John Spargo in Cape Town

[@RookieLock]

Fantastic ! Thanks for taking us along for this one..

[@soundlimit300]

An excellent video Robin.

[@tonyking9235]

NICE ONE WOLF IN SHEEP'S CLOTHING. BEEN HOPEING YOU WOULD PUT A VIDEO ON . THANKS BUDDY.