Grindng the Carbide Inserts for the Carbide Boring Bar

The final video in our "Keith Rucker" boring bar series! It's all completed and in Keith's hands. We learned a lot during this process and we're glad we had the opportunity to work with Keith and Robin!
Links Below:
Keith Rucker:
/ ksruckerowwm
/ vintagemachinery
Robin Renzetti:
/ robrenz
/ robinrenzetti
Grandpa Bruce Whitham
/ @brucewhitham
/ whithambruce

[@ROBRENZ]

Very nicely done Steve! Thanks for letting me join the collaboration and glad it worked out. ATB, Robin

[@SolidRockMachineShopInc]

Thanks Robin. It was a pleasure working with your design. Thanks for the time and effort you put into it and the materials you provided. Steve

[@reideichner8597]

Excellent series and results! Your use of the surface grinder and attention to detail is awesome! Thanks for taking us along.

[@SolidRockMachineShopInc]

You're welcome Reid. Steve

[@johnbodmer5645]

Great fun watching you guys work this out. It will be interesting to see Keith cutting this threads. Thanks for the lessons in precision.

[@SolidRockMachineShopInc]

You're welcome John. Steve

[@danielwerger5641]

Wonderful video Steve...! Special shout out to your daughters, who's increased confidence level is definitely noted. Cheers to all of you. Thanks from Canada...!

[@SolidRockMachineShopInc]

Thanks Daniel. Steve

[@duobob]

Thank you so much for the segment on side wheeling details. I learned important knowledge there that I had no clue of. You made it easy to understand. Just keep talking through every video. The stuff that is obvious to you is otherwise mostly unobtainium for us.

[@SolidRockMachineShopInc]

Thanks Bob. Steve

[@gayle4s383]

Great video, great toolmaker, great family

[@SolidRockMachineShopInc]

Thanks Montana. Steve

[@warrenjones744]

Excellent conclusion to a great tool making adventure. Nicely done ladies & gentlemen.

[@SolidRockMachineShopInc]

Thanks Warren. Steve

[@outsidescrewball]

Awesome build, discussion, demonstration, and video.....enjoyed the intro with your beautiful daughters and love seeing all of your specific tooling that you have built...learned a lot about setups....

[@SolidRockMachineShopInc]

Thanks Chuck. Steve

[@roncartwright8125]

Such attention to detail, Brilliant. Can't wait to see Keith use it!

[@SolidRockMachineShopInc]

Hi Ron, Keith already let me know he can't wait to use it. I hope everything works out well for him. Steve

[@matthewsutherland83]

Another great video to end this series on. It's funny to think that to the eyes of most people this bar is nearly as simple as a tool can get. Just a bar with a tiny piece of hard stuff clamped in it. What's the big deal? But as you've shown, the cleverness and subtlety involved, from design to execution, is truly, truly impressive. Thanks for sharing Matt

[@SolidRockMachineShopInc]

Thanks Mathew. Steve

[@Tools4Machines]

Thanks for the tip on wheel wear, high pointing, from the inside out. Great video series. Cheers, Gary

[@SolidRockMachineShopInc]

You're welcome Gary. Steve

[@robertengl9152]

Thanks for the series. Very well done

[@SolidRockMachineShopInc]

Thanks Robert. Steve

[@bcbloc02]

You and Robin did a nice job. A tool and cutter grinder likely would have made this project go a lot easier.

[@SolidRockMachineShopInc]

Thanks Brian, I don't have one of those yet. The inserts actually ground up very fast with the setup and the repeatably was great. Steve

[@ActiveAtom]

Hi nice to see you out from behind the camera. We are liking the KZbinr collaboration Steve Keith and Robin (means this is going to be a great boring bar for sure 3 experts make a cutter) come to an end with this boring bar heading off to Keith where it will be in good hands and waiting to watch him Keith utilize it in the shop. Wonderful boring bar thank you for sharing the making of this fine precision tool:)

[@SolidRockMachineShopInc]

You're welcome. Steve

[@RyanWeishalla]

Nice project and fun to watch.

[@SolidRockMachineShopInc]

Thanks Ryan. Steve

[@barrygerbracht5077]

Nice work. Turned out great.

[@SolidRockMachineShopInc]

Thanks Barry. Steve

[@OldIronShops]

Love to watch you working

[@SolidRockMachineShopInc]

Thanks Chris. Steve

[@James-fs4rn]

Enjoyed. It would be nice to see the geometry lesson for the tool angles. Maybe Robin could make a video on it? Thanks

[@SolidRockMachineShopInc]

Hi James, I don't think Robin is planning on doing a video but I agree it would be A nice lesson. Steve

[@MakinSumthinFromNuthin]

Nice work Steve! Great looking bar 👀

[@SolidRockMachineShopInc]

Thanks Richard. Steve

[@t.d.mich.7064]

Hi Steve, grinding solid carbide is very time consuming. Back in the late 60s and early 70s, I had to repair and maintain some solid carbide progressive dies. They ran .007 thick stainless strip stock at 1100 stokes per minute and made loads of parts, but what a pain to keep them running!

[@SolidRockMachineShopInc]

They use a lot of carbide at my full time job too. They work very well especially with some of the coatings but you are correct that it is time consuming to work with. Steve

[@robc2536]

Thanks for a great series on the boring bar build. A lot of good information passed along. Your sine plate is a work of art, with so many good features. I was wondering what manufacturer and grit diamond wheel did you use for this project?

[@SolidRockMachineShopInc]

Hi Rob, It is a Norton 150 grit wheel. I believe it is a 100% concentration. Steve

[@Proud2bmodest]

If you bang a finger nail, keep it well above heart height for about ten to twenty minutes. This lowers the blood pressure, prevents the nail from going black and helps keep the pain down.

[@SolidRockMachineShopInc]

Thanks for the tip. Steve

[@pierresgarage2687]

This turned out great... Since carbide is kinda brittle, you never know, Keith may save himself by using the HSS insert you made extra, HSS is quite forgiving and so much less brittle... Nice work, also very helpful to have Robin as a friend...

[@SolidRockMachineShopInc]

Hi Pierre, You may be right about that, we can always make Keith some steel cutters if these chip or break. I was very happy to have Robin's help on this project. Steve

[@rickbrandt9559]

Watched Keith Rucker use acme threading bar WOW, nice job.

[@SolidRockMachineShopInc]

Thanks Rick, Robin was the brain behind that and deserves the lions share of thanks. Steve

[@rickbrandt9559]

@@SolidRockMachineShopInc Sent it.

[@dimtt2]

Hello, I enjoyed this video series very much. Watching this final video though a question does come up about cutting threads with such high helix angle that necessitate inclining the cutting insert. With the cutting edge inclined where do you set your centre height? At the toe (leading edge)? heel (trailing edge) ? midway of cutting edge?

[@strangefruit8776]

dimtt2 always at the highest point that contacts the work.

[@ROBRENZ]

The bar is designed with the insert on center height at the middle of the tip width. The tool must be this way to generate the proper form. In this case Kieth can just put the bar center on center height and the insert will be at the right height.

[@dimtt2]

@@ROBRENZ Does this have to do with the way you calculated the compound side relief angles for this particular application? Or is it a general rule? And to make my question more specific, if I was to be using a commercial inserted boring bar with a special inclined shim under the insert such as demonstrated here www.mitsubishicarbide.com/en/technical_information/tec_turning_tools/tec_threading/tec_threading_formula_top/tec_threading_formula where would I need to set my centre height?

[@AmateurRedneckWorkshop]

Great job and a great product. If you were charging for your time this would be a very expensive boring bar.

[@SolidRockMachineShopInc]

Hi Harold, I was not even tracking the time because we were shooting the videos but you are correct it would be expensive if I charged shop rates. Steve

[@houseofbrokendobbsthings5537]

Nice opening ladies. Robin is scary smart along with your Dad. You could do a lot worse than having Bruce as an adopted Grandpa. _Dan_

[@SolidRockMachineShopInc]

Hi Dan, Thanks for the kind words. Steve

[@kathyb7126]

We love Grandpa Bruce!

[@MegaRiffraff]

👍🏻

[@mikebarton3218]

Hello Steve, l found my way to your channel after watching Kieth's acme nut video. Good work from you guys. I now need to catch up with your other videos, so many happy hours viewing ahead. Greetings to another branch of the Barton clan. My name is Michael, the same as your son. Do you have English ancestors by any chance? Best regards, Mike

[@kathyb7126]

Hi Mike, We have an English neighbor that told us our last name was more Irish than English. I got really curious recently so I've been working on our family tree and one side (not the Barton side) I was able to trace all the way back to Scotland for several centuries, they'd go from England and Ireland for a little bit but always end up back in Scotland. The Barton side of our family is really hard to trace but I'm working on it! I'd love to know our family history!

[@kathyb7126]

Ok, so I did a bit of digging and possibly traced our Barton name back to Hadlow, Kent, England in 1680 for at least 2 generations. I haven't been able to go back farther than that.

[@thomasvmanning]

Aww yissss!

[@SolidRockMachineShopInc]

Hi Thomas, I hope it works out well for Keith. Steve

[@thomasvmanning]

@@SolidRockMachineShopInc I'm sure it will. A huge advantage to this approach is that it's relatively painless to change the cutter geometry.

[@davidhamilton7628]

No good deed right. Great build heal quickly

[@SolidRockMachineShopInc]

Thanks David. Steve

[@Ujeb08]

looking great so far Steve! It's alot of work for one piece but that's on the original designer of that lathe's acme thread for not using a "standard" acme thread. I wonder if the coarseness of this thread gives the wanted feel when operating the crank at the machine? Or if a finer acme, a standard, would do the job without the repair/replacement problems this "far out" design caused? in any event, thanks to you and Robin for a great machining series.

[@SolidRockMachineShopInc]

We spent way more time on the videos than the bar. This was about my journey in an area that was new for me. It was more about the learning than the economics. Keith could have made it anything he wanted to but I believe his goal is restoring to the original but I agree with you on the feel. Robin did an awesome job in the design an it was nice working with him and Keith on this project. Steve

[@rickbrandt9559]

Do you even understand how the lathe works and what the manufacturer was able to achieve?Listen to the narrative,Keith explains why the size.

[@paulmanson253]

@@rickbrandt9559 Quite possibly he does not. There are many reasons for watching content like this. Maybe he wishes to learn ? Sufficiently valid question given the wide number of manufacturers of lathes in the last 150 years . All of whom did certain things differently. No one is going to have the same feel if moving to a different brand name machine.

[@Ujeb08]

How old are you 12? I guess you haven't learned how to be polite yet. I made a good living as a machinist for 30 years and then taught it to college mechanical engineers for another 16 years! I've since retired and still enjoy watching machinist videos. t@@rickbrandt9559

[@Ujeb08]

by the way Dick, I put 2 kids through 2 of our countries' best universities and retired comfortably by 62.

[@bryansmith6315]

Very interesting and educational. You mention several specific "Z" heights. How did you calculate these and how did you calibrate the wheel position for those heights?

[@SolidRockMachineShopInc]

I wrote them down when making the first one. This made the second and third one much faster. Steve

[@bryansmith6315]

@@SolidRockMachineShopInc Aawww| "cheating" :-( I hoped there was some really clever magic involved. Thanks for clarifying.

[@youpattube1]

Two nice young women.

[@SolidRockMachineShopInc]

They are very precious to my wife and I. They have been a real blessing to us. Steve

[@strangefruit8776]

I really enjoy your videos but if I could make one request it would be for a shorter intro. I personally would rather get to the main attraction quickly.

[@SolidRockMachineShopInc]

It is hard to please everyone. We try to do the best we can. Some want shorter videos, some want longer ones. Some want more details, others want less. Some want machine videos, some want grinding video. We use the intro to give a glimpse at what the video is about. One thing that those who would like to skip it can do is use the slider bar KZbin provides and skip it or speed through it faster. Steve

[@thomasvmanning]

My two cents- that's like their style. That's their format. I say change nothing

[@duobob]

Just keep the videos coming, Steve. Your video skills (as a group) continue to improve over time, and are already excellent. Content, content, and content is what I am after, and you all are doing a amazing job of getting the message to us, every time.

[@mikemarriam]

@@SolidRockMachineShopInc I liked the intro.

[@matthewsutherland83]

I've got the exact opposite view. I feel the intro sets the mood nicely before getting into the tech and I like to see your own style developing. The videos are getting more polished with every episode. If it were a straight instructional video that would be cool too and I'd happily watch it but with the personal touch in all your vids I almost feel that the Bartons are neighbours of mine! From my point of view, you can never go too heavy on the details. As you casually explain things while working you communicate volumes. It really does remind me of the best tradesmen I've worked with (and learnt a lot from). Matt