MAKING AN INSERT BORING BAR

[@ThisOldTony]

Brilliant work! I enjoyed that immensely. Keep'em coming!

[@ROBRENZ]

Thanks Tony, that means a lot coming from you! ATB, Robin

[@davearreola6758]

I asked my wife if I could get something from your store for Christmas she said yes 3 👕 yay.

[@Wagamanee]

@@ROBRENZ the front door every five minutes to complete veg food for the rest I've had to be the first time I will send me the messages 😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃😃 I have to do the needful and send you the best regards and best wishes and thanks again and I am I still need a fact 😂☺️😂☺️😂😂☺️☺️☺️😂😂☺️☺️😂☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️☺️The New school and

[@shawnhuk]

Robin, really great to see you back on YT!

[@user990077]

Understatement of the year "The quality is much higher then the ones I bought".

[@dauber1828]

Like always Robin what a great video please keep them long and thank you

[@rocksolidhugo]

You are not making enough videos but you are making videos with amazing amounts of information and detail. Always a pleasure to spend an hour watching them. Thank you , once again.

Awesome. Thanks uncle Robin ;)

[@Pappaoh]

You crack me up man, and your vids are top shelf.

[@MF175mp]

When will you make your own Cà Lem?

[@anonymousgeorge4321]

There aren't many guys who I would sit through watching an hour and a quarter video with. You're the best.

[@OldtimeIronman]

Yay! A Robrenz video! It's a real treat to learn from a pro, he always points out details that I would have missed at first glance. Quick, somebody call Stefan!

[@StefanGotteswinter]

Thanks a lot for this video, I enjoy watching the way you attack certain machining problems a lot. Always something to learn. I am definetly guitly of infeeding from the outside with superabrasive wheels, I have to do a fair bit of reshaping on my wheels to keep them sharp-edged. Should definetly keep your pointer on that topic in mind.

[@ROBRENZ]

Thanks for watching Stefan. ATB, Robin

[@CaskStrength777]

Tool & die guy who works with Viscount 44 a lot. The stuff is available in generic form under drill rod manufacturers by different names, I think we get Precision Marshall Firechrome 44. From what I've been told, actual Viscount 44 is not being made now under original name anymore, but the basic formulation is available under different names for drill rod at least. A. Finkle FX T2 & T3 triple vacuum melt steel is great too- but much harder. Always wanted to make my own insert boring bar- so many are indeed poorly made. Your 0.005" pocket screw offset is what I've been told exactly by a custom small insert tool manufacturer near me who specializes in HSS insert tooling- most people don't know that detail. Guys- if you want to make one of these- he got every minute detail on it. I definitely learned a couple tricks. Would love to see a dedicated vid on the D bit geometry and radial relief grinding. Awesome work Robin, you make quarantine livable

[@ROBRENZ]

Thanks for the kind words and the steel tips

[@EdgePrecision]

Great video Robin! If I can be so bold and make one suggestion. If you mill the bottom of the pocket just slightly larger to leave a small vertical wall that goes about 1/4 to 1/3 the way up your side angle. That would give you a corner relief sort of like your top relief below the cutting edge. This would make it so you don't have to chamfer the bottom corner off those small inserts. Yet still leaves plenty of bearing area for the insert. Thanks again for taking the time making the video.

[@ROBRENZ]

Thanks Peter, I do that on larger insert pockets. I intentionally did not do that on these because the wall on the cutting side is already extremely thin and they have a tendency to just fold over and rip back destroying the pocket integrity. So I wanted all the meat I could get on these. ATB, Robin

[@Jeffen]

Haha i didn't even realize i watched this for over an hour, time flies when you have fun. Thanks for the great content

[@ROBRENZ]

Glad you enjoyed it!

[@trickengg]

As always, I am blown away at the things learned from your videos. Thank you for sharing this content with us all! You are a WIZARD!

[@ROBRENZ]

Glad to help!

[@azenginerd9498]

I use reference sketch geometry to "do the math" often - a very underused technique. A joy to see you present it.

[@toddpeterson7316]

Robin, at long last! You have been sorely missed! Thanks for the wonderful content!

[@Idontrunntoofast]

I built my first CNC router in high school, majored in physics, minored in chemistry. Spent 7 years as a Cisco ccnp wireless engineer, built my own cnc machines and started my own welding fabrication and cnc machining business... watched two of your videos and realized I am an idiot.

[@ROBRENZ]

LOL

[@xmachine7003]

😂

[@pierresgarage2687]

Hi Robin, Really enjoyed and got lots of good points to improve my work, that hour+ video went by real quickly... As your other well prepared videos...!!! Thanks for the time you spend sharing those fine techniques. ATB, Pierre

[@ROBRENZ]

Thanks Pierre, good to hear from you. Hope all is well with you and your family. ATB, Robin

[@pierresgarage2687]

@@ROBRENZ We're doing fine, hope for the same on your end...!!!!

[@Preso58]

Well, that's the best hour and a quarter of time that I've spent all month. Beats Netflix hands down. Regards, Mark Presling Australia

[@ROBRENZ]

Thanks, that's nice to hear.

[@toolbox-gua]

I wish I had You as my teacher back in school/college years. Awesome work, again. Thank you for sharing your wisdom.

[@ryanjordan7113]

If your trying to get knowledge drunk Robin is Everclear! 100% baby. I don’t know a smarter individual. Just amazing simple and plain.

[@KamiCrit]

Oh my goodness, all that in six hours! It would take me six hours to decide which broken boring bar I should use.

[@mhc6777]

Great video full of detail and explanation - now I know what other KZbin machinists mean when they say "The full Renzetti".

[@adrianu5481]

Thanks Rob, I learned more from the silver soldering segment than from all the other videos on the subject I have watched.

[@christinaedwards5617]

Thank you so much for taking the time to make this video amazing work robin as always

[@ROBRENZ]

Glad you enjoyed it!

[@cliffordarrow6557]

Brilliant, superlative content as usual! Thanks for creating!

[@ROBRENZ]

Glad you enjoyed it!

[@josemorales-er5eh]

Thats the longest how to video Ive watched no regrets learned a lot from it.Thank you very much professor.

[@ROBRENZ]

Glad to hear that

[@Gjed16]

Another thoroughgoing post by The Master POTMA. Most questions anticipated, asked and answered. Been postponing my viewing of this one for a while. Sometimes waiting is. 👍💯🧠🏆👏

[@sierraspecialtyauto7049]

A tremendous amount of information...something here to benefit almost any machining job. Thanks for taking the time to share.

[@WrenagadeWorkshop]

Best hour I've ever spent, I was so engrossed, i didn't even realise it was actually that long. Great tips too, all of them were real belters. This episode is going in my favourites for rewatching and referencing. You are an absolute legend Rob, thank you from the bottom of my heart for taking the time and effort to share your astounding knowledge.

[@ROBRENZ]

Thanks for the kind words and glad you enjoy the content.

[@sblack48]

This is insanely great. These videos should be an accredited masterclass in tool making. I wish there were more but this must have taken many hrs to put together. While it is long, the density of knowledge in this is staggering. I will watch it many times. In the words of Wayne and Garth, we’re not worthy!!! Oh and please do a vid on your rotor head, pleeeeeeeeease. ATB

[@ROBRENZ]

Thanks, and the rotor head is on the long list

[@PhilsProjects]

Another master class in how to do it correctly, Thanks Robin, be safe

[@ROBRENZ]

Thanks Phil, you too!

[@glennstasse5698]

I don’t t do any metal machining. I come for the inspiration and Robin never lets us down. Never! Exquisite workmanship. Thanks as always...

[@ROBRENZ]

Wow, thank you!

[@liamlevins6570]

Wow! this man is the Da Vinci of the 21st century's machine world

[@outsidescrewball]

thank you for all of your time/discussion/filming....I was so intrigued watching that my coffee got cold...awesome video!

[@ROBRENZ]

Glad you enjoyed it Chuck! ATB, Robin

[@bugrobotics]

Efficiency is a beautiful thing. Thanks as always for sharing!

[@kglesq1]

Way beyond my skill level, but fascinating to watch. I always really enjoy your content. Thank you.

[@0verboosted]

Robin I watch a lot of machining channels on KZbin; no one makes tools with the detail that you do. Well, maybe Tom Lipton ;) Glad to see another a video after a hiatus!

[@ROBRENZ]

Wow, thanks!

[@bobvines00]

I put Robin, Tom, & Stefan in the same, very small group of Machinists that want to share & teach their skills with the world of Machinists, while working to much higher standards than most work to.

[@eliduttman315]

@@bobvines00 Can you imagine the SCARY stuff that would get made, if all 3 were in 1 shop at the same time? Cream rises!

[@glennfelpel9785]

I am highly impressed by your SolidWorks knowledge and ability. Your In context modeling the use of multiple design sketches within parts and assemblies shows you have a deep understanding of the software. I have been modeling in SW for over 20 years but we mostly do injection molded part design. Keep up the good work. The in context modeling is one of the most demanding SW skills...any little glitch will sink a whole model. I Keep working backup progress files in safe keeping until the very end. Thank you for the video

[@ROBRENZ]

Thanks Glenn, I have been using SW since the beginning but I an no expert. I use it only about 5-10% of my time as I usually manufacture what I design. Your right that in context can get you in big trouble fast.

[@SolidRockMachineShopInc]

Great to see another video Robin! Steve

[@bones357]

I don't know how to fully express just how exciting it is to watch this master toolmaker go through the full tool making process. I watch these videos intently and intensely, with real reverence. I mean it, if folks don't know just how how much time, dedication, and just pure talent is involved in a trade like this, well, know you know!👊👍😊

[@ROBRENZ]

Thanks for the very kind words

[@shawnlund]

You certainly set the bar high for everyone else. Nicely done and really enjoyable to watch.

[@JlerchTampa]

When you reach the last word of the last page of a very good book, and then you flip to the first word on the first page and thoroughly enjoy re-reading the story. Occasionally the second reading is even better than the first. This video is just like that, I very much enjoyed it and all the little gold nuggets of wisdom and experience you shared! Thank you!

[@ROBRENZ]

Love that!

[@gregghooper]

You are the Master! Thank you for sharing

[@HanstheTraffer]

I just started learning some machining. Doing what is necessary to make the things I need. What a difference there is between someone who knows what they are doing and a cave man newbie like me. Thanks for sharing your expertise. It is an absolute privilege to watch you sir!

[@rexmundi8154]

That is some very clever modeling. Like a lot of old machinists, I never got any Solidworks training in design. Moving from manual machining to CAD / CAM / CNC was a big move for me. Of course most of us had some exposure to programmable DROs and conversational programming like Prototrak and Dynapath, but making stuff work in Solidworks was a steep hill to climb. It’s frustrating when you know what you need to do and you can’t figure out how to make Solidworks do it. At least I have my Machinery Handbook to fall back on. Learning how to use that was probably as hard as Solidworks if I’m being honest. But I was younger then and my eyes were better.

[@Engineerd3d]

Always learn from you. This is better than classroom time. Enjoyed every minute of this.

[@davidmurray700]

Thank you Robin for taking the time to share the knowledge. Always love seeing your thought process, almost more than the tips & tricks during machining. Take care, & ill be right here when the vid comes.

[@JamesChurchill3]

I can't get over how quick you are with changing parts in the lathe, those collet stops and expanders sure make a difference!

[@b2dmastersniper]

After watching youtube machinists for literally a decade and learning a massive amount, I am very happy to have found another channel where I cant completely predict the whole project start to finish, I learned more in the last hour than I have in the last month. Awesome channel, I have alot to catch up on.

[@zacjust752]

Excellent work, I especially appreciate how you explain your workflow in designing the part. I also like your explanation of steps and the reasoning behind it. I learn a ton of little things most people would skip over.

[@ROBRENZ]

Glad it was helpful!

[@KDMEDIC]

As a Utility man (universal shop work and industrial repair) i enjoyed watching your video. Thx for taking the time to make it. You are a Master. Thank you.

[@st3althyone]

Such a wonderful time watching you work Robin. As always, you make learning so much fun!

[@ROBRENZ]

Thank you so much!

[@chrissollazzo6835]

If only I had a shop teacher 40ish years ago like yourself when I began my machinist career. I had to break alot of tools, and an occasional g-code crash 😩, to learn one fifth the information you pass along in these video. I sincerely appreciate your efforts making these videos and you sharing your expertise and experience.

[@stumccabe]

Thank you Rob - beautiful work, wonderful attention to detail. I certainly learned a couple of things.

[@robertwatsonbath]

Thanks Robin, I'm sure we all appreciate the extra time required to make the video alongside. Six to seven hours of work time? Wow, I'd probably be still milling the hex at that point, haha. Very much enjoyed :)

[@druidnoibn7218]

Hi Robin, Great work as always - we need to see more of you...HINT...

[@RGSABloke]

Robin, the most expensive boring bars on plant earth but ten times the value of what’s mostly available. Yet another master class, Tom Lipton on steroids level. One of the most enjoyable parts of your videos is the thoughtful planning and meticulous attention to detail. Also, this must have taken ‘an age’ to stitch this video together. The production values are amazing. I think even ‘This Old Tony’ would would be awarding you top marks for this masterpiece. Thank you so much for all your efforts. Most sincerely. Kindest regards from Bonnie Scotland. Joe. PS stay safe and well👍😎

[@ROBRENZ]

Thanks and same to you!

[@akfarmboy49]

Really good information Learned at least 6 things I need to look into a D grinder Thank you

[@ROBRENZ]

Glad it was helpful!

[@davesalzer3220]

It’s always a treat to see a video from you. Thanks.

[@ROBRENZ]

My pleasure!

[@crazytrutas]

Absolute machine Porn! Thank you for taking the the time to film this all. Great work.

[@robertpoirier5157]

Thank you very much for sharing your knowledge Rob!

[@arnljotseem8794]

As a hobby machinist I am blown away by your videos, and that is to be expected. You are of course on another level. However, there is so many things to learn from these videos, so if I can pick up only one or two things from each viewing I can greatly improve my skills video by video. You and Stefan are my favorite tutors in my machining venture. Thank you for taking the time.

[@ROBRENZ]

Thank you Arnljot!

[@edissmajic]

It's been a while since I watched something longer than 30 minutes. Well worth it... Excellent content and craftsmanship.

[@ROBRENZ]

Thank you.

[@WeTrudgeOn]

As usual an absolute thing of beauty and a joy to behold.

[@ROBRENZ]

Thank you kindly!

[@WeTrudgeOn]

@@ROBRENZYou are welcome and thank you for all the information in the video.

[@Ideasite]

Unbelievable creativity & skill! You are an inspiration. Thank you! Please continue the cause for the army of people like me who gain giant steps with each video.

[@alexanderhowa9707]

Great video. I didn’t know they had indexable bars this small.

[@bruceanderson9461]

One thing I have learned over the years is to take the time to consider all of the ways to do a machining operation before making a decision on which to use. My son and I used to make a game of how many ways we could do something before actually doing it. This goes right along with your advise to always consider future steps before rushing in to get the present step done. Both of this can result in some real revelations on how best to proceed. Thank you again for the great video as I know how much extra time it takes to video it.

[@phillipyannone3195]

Absolutely fabulous video and superb results. Thank you for sharing your lifetime of experience.

[@ROBRENZ]

Glad you enjoyed it!

[@steveparker8723]

I'm not a machinist but I worked in a shop that had several machine shops for both die and tool making. Love watching the journey you take when making things. You explain and show the how and why very well.

[@torerlendfgri2514]

Excellence in presentation, execution and education. Thank you!

[@ROBRENZ]

Glad you enjoyed it!

[@WideAwakeHuman]

Holy moly... Thought I was gonna see a run of the mill video but this was on another level... Very nice

[@ROBRENZ]

Glad you liked it!

[@lepompier132]

It's always nice to know. I've seen twice the need to do an insert tool inhouse for a specific job where I used to work. Niice job!

[@userwl2850]

I'm super impressed. Watched the full video without skipping. Top work. 👏🏻👏🏻👍

[@ROBRENZ]

Awesome! Thank you!

[@shimmerite_ua]

Thank you very much for this excellent video! I've used this brazing method with a solder feed hole with great success, very convenient and clean

[@TroubledTimes2024]

Not my 1st time to watch this and am impressed once again.

[@Gipsy58]

I enjoyed every second of that movie and am speechless.

[@James-fs4rn]

👍 anything you make is better than can be purchased! Thanks for sharing another Robin. I cling to every word you have to say and appreciate the lessons. Stay safe and well my friend!

[@ROBRENZ]

Wow, thank you!

[@euclidallglorytotheloglady5500]

The walls for the insert are just beautiful! Wonderful work!

[@stefanhertweck]

Great content, thx for sharing. A few years back I also made a tool holder for DCMT and VCMT carbide inserts and used my D-bit grinder so that I could mill out the 7° relief angle. A good CAD/CAM package and CNC mill ease the process of milling out required contours. This approach opens up further possibilities to fulfill those kind of special jobs :)

[@cdbflynow]

Just super! Thank you Robin Paul

[@Vikingman2024]

You are in a completely different league! Absolutely incredible!!!!

[@ROBRENZ]

Wow, thank you!

[@matts8023]

Beautiful. Extremely educational, thank you for all the effort to edit and present in such an approachable way!

[@ROBRENZ]

Glad you enjoyed it!

[@johnspargo5876]

Thank you Robin - my favourite "practioner" kind regards from John Spargo in a locked down Cape Town

[@tombellus8986]

Your skills are amazing and thanks for sharing them with the world. Stay safe and live long.

[@ROBRENZ]

Thanks, you too!

[@denniswilliams8747]

I am impressed with the small inset holder production Thanks

[@Ryan-dz3jo]

Thanks Robin, I am privileged to look over your shoulder to listen and learn. Thanks for sharing your time, very much appreciated.

[@ROBRENZ]

You are very welcome

[@2lefThumbs]

Beautiful holders! Very useful tip on wheel wear on the d bit grinder thanks👍👍

[@captcarlos]

Magnificent, beautiful work done there Rob, enjoyed every minute. I will have to watch it a few times, as usual, to get the most out of your lesson. If you were contemplating manufacturing a run of those bars..... Hmmm Keep safe.

[@StuartdeHaro]

Very cool video as always. You really make me wish I had room for one of those grinders.

[@warrenjones744]

Great video Robin. I may never need to build one of those, but the procedure and sequence lesson was worth a million as they say. That set screw mount will stick in my mind now.

[@bob_mllr]

Great video Robin. I feel like I just spent the day in your shop learning. Thanks for being so generous.

[@ROBRENZ]

Any time!

[@vandeweb]

Thank you! I learned so many things watching this. Your talent for creating these things and explaining the process is truly unique.

[@ROBRENZ]

Glad it was helpful!

[@bearup1612]

years ahead of me. I'm just a beginner. Thanks for the video

[@williamhinrichs6558]

Great process video. This video is invaluable to me. Thanks for going through and filming nearly every part of the process and for explaining your strategies along the way.

[@ROBRENZ]

Glad you enjoyed it!

[@glennedward2201]

Started making my own tooling over the past year. I’ve found it’s easy to make a better indexable holder myself than what’s available to purchase.

[@johncarey9149]

Thanks Robin. I commented on your last video that I sat through 94 minutes of video that has zero relevance to my day job. This time it was 96 minutes. Your attention to detail is quite exceptional, and the planning and foresight that you manage to explain simply and clearly is outstanding. Many thanks, I hope you and yours can stay safe and healthy

[@ROBRENZ]

Thanks, and same to you.

[@tobyw9573]

John Cary, Nothing like having a hobby that is totally different from the day job!

[@johncarey9149]

Yes @@tobyw9573 I agree, but the work that Robin does is so far removed from my tinkering with a desktop CNC that it might as well be a completely different subject :)

[@jr540123]

Amazing work. This is basiclly how it used to be done years before CNC machines.

[@bcbloc02]

I was 30 minutes into this video before I realized how small these boring heads were, I feel bad because I had plainly seen the blueprint at the beginning. I guess that is what happens when you work with big stuff all the time you forget about the small ones. I have never used a boring bar that small.

[@ROBRENZ]

Thanks for stopping by Brian. These could be very useful in your big Monarch ;-) ATB, Robin

[@jtkilroy]

I'd misplace a boring bar that size, in the chip pan

[@forrestaddy9644]

One of my old mentors taught me the ins and outs of a splendid little instrument lathe in the chonometer shop. He told me that liittle parts are no different from big parts except they're little. If that remark didn't puzzle a third year apprenticei he had a fund of others just as elliptical.

[@cschwad559]

It’s good to see someone using a spot drill instead of a center drill for spotting operations.

[@marks5603]

Thank you very much. Both the knowledge shared and the time and effort to shoot and edit clearly leave me speechless.