Modifying a boring bar (Carbide Shank)

[@StefanGotteswinter]

Please no more comments towards Jason/Fireball Tools video. I am subscribed to him and have seen it right at release.

[@harlech2]

You should watch the Fireball Tools video :P *ducks*

[@petergamache5368]

The "right" filing technique is the one that gets the job done. It seems a lot of people forget that files are consumables, not heirlooms. :)

[@warrenjones744]

Amen Brother!

[@paulerenberger1286]

A quality file is like what 30.00? If I have to replace it twice in my life because is “didn’t use it right”, it is what it is.

[@HansFormerlyTraffer]

@@paulerenberger1286 I buy used ones for like a dollar per...it they are worn out I just soak them in acid...most of the time that fixes them.

[@8__vv__8]

Everything’s disposable for you kids. Back in my day, we had to make our own sandpaper from sand and paper, and if the sand fell off, you had to glue it back on. And God help the apprentice who asked the foreman for more sand.

[@mark314158]

@@8__vv__8 Ask for sand? We had to make our own sand by grinding rocks...

[@SamEEE12]

I am a simple man, I see a Stefan Gotteswinter video; I smash the like button.

[@jeffschroeder4805]

I really appreciate your demonstration regarding the relative "stiffness" of steel vs. carbide. Thank you for the extra effort and time.

[@pontoonrob7948]

"And then I have yo bock you "....way to go! Awesome. Put those arm chair know it all in their place! Love it!

[@super8hell]

Bocking as dipping in a strong German lager?

[@pontoonrob7948]

@@super8hell I should not spell while drinking.

[@Gottenhimfella]

@@pontoonrob7948 expexially dirgking Bock

[@adam19890911]

That little grinding vise allways steals the show.

[@SolidRockMachineShopInc]

Very nice job Stefan!

[@m3chanist]

"And then I have to block you" lol such a completely reasonable gentleman this smiling assassin. Drag on my good fellow.

[@karlpron]

Watching boring bars with you at the wheel is never boring :)

[@jeff1176]

I'm no machinist. I find the amount of deflection interesting, I had no idea there was that dramatic of a difference between the round stock. Thanks this was very interesting.

[@Hoaxer51]

Especially that short of a distance of stick out.

[@johnnycab8986]

Fireball Tool has an interesting video on filing technique. Great video as always!

[@donteeple6124]

Excellent stress and strain (deflection) comparisons on the materials, never would have figured that it would have been that much. Great lesson !!!! and even better idea on the modification to the bar.

[@mpetersen6]

As Stefan demonstrated in a video a few years back everything is made of rubber. Put an indicator on a vise jaw and clamp something up. The fixed jaw will move. How much depends a lot on the design of the vise.

[@drevil8519]

Not only did i take the accuracy with a grain of salt, i added pepper as well. Love this channel.

[@pgs8597]

G'day Stefan. I'm always impressed of the strength of a silver soldered joint. As for filing techniques, what can be said of the die filer it is a reciprocating motion with no regard to its backstroke, anyhow do it how you like as I think most of us keep our files far too long anyway, I know I do. Cheers Peter

[@ferrumignis]

It's a sad day when you have to accept your favourite file's best days are behind it.

[@chattonlad9382]

PGS. Very good point.

[@johnnason7019]

We media blast the excess braze in the cutter shop at work and it works beautifully.

[@jonsworkshop]

Great mod Stefan, and despite the slightly sketchy setup, the science and the results were really interesting. To be within a few microns of correlation to the modulus of elasticity, is really satisfying to see. Well done, and file how best fits the job! Cheers, Jon

[@NML666]

Fancy seeing you here ;)

[@jonsworkshop]

@@NML666 lol, ditto!!

[@matthiaspenzlin6465]

two ways to increase the precision of the messurement or to judge it. (regarding the movement of the bars in the vise ): 1 put a bar with a bigger diameter in the vise, and messure the deflection. now you will almost read only the reading the movement in the vise. this is the offset, you can subtract from the other readings. 2 put the other end of the test indicator / magnet also on the bar you messure. so you will messure only the bar itself, regardless it moves in the vise

[@horst6855]

Geiler typ. Neues Gotteswinter Video erzeugt jdesmal tiefe Entspannung und Befriedigung. Danke.

[@rallymax2]

I really enjoyed the experiment using the Hicator. Boring bar looks and works great! Use a file any darned way you want.

[@petera1033]

Very interesting Stefan - thanks for your time and thoughtfulness.

[@JB-ol4vz]

Finally some manual work again, thank you.

[@wagminagmishagmiragmihagmi4341]

Freut mich das du mal wieder ne starke nummer rausgehauen hast! Mit den maßen stimmt ja auch noch alles 👍 Danke!

[@bjornbursell7681]

"And then I have to block you" (this made my day). Another good video. Thanks Stefan!

[@Rob_65]

at 9 am (local time in Germany) this was posted 6 hours ago. You are obviously going through sleepless nights to get us some nice content to watch while having our morning coffee ;-)

[@StefanGotteswinter]

Whats sleep? 😬

[@MrPhatNOB]

On the filing technique, fireball tools did a test rig on comparing the different filing techniques and the results were very interesting. Excellent and informative video Stefan, as usual. Thank you for sharing this content.

[@Gottenhimfella]

Did he file a range of materials? Lifting the file on the return stroke is only useful, in my experience, when filing materials which are comparable in hardness with the file.

[@jeffscott5133]

Nice video, Stefan. Thank you for taking the time to make it. With regard to dragging a file: I was trained not to do so during my apprenticeship. However, after seeing Fireball Tool's video on the subject (go see it. He has a great channel, too), I have changed my mind. He PROVED that dragging a file whilst filing steel is NOT detrimental to the file. In fact, it actually was beneficial to the process. Perhaps there are situations where this is not true, but I have yet to experience one. As a millwright and a machinist I no longer worry about dragging my files, though it is so ingrained in me not to that I almost always don't just by reflex. I hope this is useful information. Please keep up the good work! Thanks again.

[@Ujeb08]

this was a good, simple demonstration of the difference in the modulus of elasticity for Tungsten/Carbide vs. Steels. Thanks Stephen

[@jamesdavis8021]

That looks great.A fraction of the cost for a commercially available,solid carbide bar.Are the people complaining about your filing technique,buying your files?I think not.

[@MF175mp]

A chinesium solid carbide insert boring bar this size costs about €30. (Remember the business end is Chinese here also). Probably just the blank with coolant holes costs as much

[@nicholashacking381]

Stiffness is everything. And, not only in the workshop. Thank you for another really informative video. I can only dream of achieving the degree of accuracy that you reach.

[@Dave.Wilson]

And the stiffness diminishes with age!!, See Fireball Tools and his experiments with filing, works on the back stroke just as well.

[@bobbob8229]

@@Dave.Wilson that's what she said toooo 😳😂

[@jimzivny1554]

Nice project and as usual a great explanation and easily understood demonstration. Thanks for sharing

[@wolfitirol8347]

When I look videos like this , one of my first thoughts is that it's a pleasure seeing a master like him at work 🤔👍

[@AFEMCam]

Beautiful work!

[@theshannonlimit1114]

My 5 axis CNC router at work has googly eyes on the feed override knob. glad I am not alone

[@paulbuckberry7683]

Thank you Stefan, very informative. You really are a master engineer!!

[@Metaldetectiontubeworldwide]

So happy i checked my youtube notifications...althought its realy late here to. Your video's are True jewel of calmt and serenty combined with expert mechanical skills. Now i gonna watch cheers Grtz from the netherlands Johny geerts

[@vasyapupken]

you can try to make slightly thicker dampened bar with this carbide rod. make a long tube out of tool steel over this carbide rod, with a loose fit, and fill the gap between tube and rod with a thick grease. there is a many recipes of a composite bars like that.

[@EitriBrokkr]

I've never heard of such a thing...I'd like to see that done

[@brianrhubbard]

Fireball Tools has a video where he tested different filing techniques to the extreme and you would be surprised by the results. You make precision work look simple.

[@angelramos-2005]

Nice detailed work.Thank you.

[@darrylwhitman8475]

Hi Stenfan , I'm new to this as I am hobbyist machinist, learning alot from your videos , plz keep them coming,

[@ohhpaul7364]

That was amazing. I expected the smaller diameter rod to have the most give but it was the heat treated, larger bar that moved the most.

[@than_vg]

Thanks for the trigger, I'll have to make me one of those as well. I think Robin showed a different approach, boring what was left off the original tool and necking down the carbide shank, or something like this. I think I might try that one, since I have zero faith in my soldering skills....

[@ZAMsChannel]

Toll, Stefan, habe wieder viel gelernt... 👍 Mach Dir nicht so viel Gedanken über das potenzielle Besserwissertum mancher Leute. Für unsereins ist es immer etwas schwer, das zu "notchen", aber wir dürfen uns nicht davon runterziehen lassen. 😎🤞

[@jessefoulk]

Pretty cool video. That "bonus" footage at the end was interesting.

[@pirminkogleck4056]

yes ! gtwtr content !

[@TrPrecisionMachining]

good job stefan..when you have to use tools with so much overhang, you have to use tools with hard metal handles and thus minimize vibrations...they are quite expensive but in china you can find them at reasonable prices...greetings from Spain

[@drevil8519]

That silver solder job was masterfull

[@JoeSmith-id5ct]

Please don't block me. I noticed you were dragging the scotchbrite on the back stroke. You know that may cause it to wear prmaturely. You might even cause it to wear enough that you would have to replace it. Great video. Thanks for sharing.

[@HansFormerlyTraffer]

Oh no! Stefan is a scotch brite abuser.....

[@wizrom3046]

Get a marker pen and draw arrows on the scotchbrite and then you can use it in the corrent direction evsry time. All my scotchbrite pads and sandpaper squares have arrows drawn on them. So does my carpet mat, so I can walk through the doorway at the correct angle. I'm not going to mention my wife's tattoos...

[@oldscratch3535]

@@wizrom3046 I know you're joking, but scotchbrite does seem to have a direction. If you want to put a finish on stainless steel then you have to start at one end and use the same piece of scotchbrite in the same orientation using one clean stroke with even pressure. If you turn it 90 degrees then you get a different cut and it looks different. We made some matte finish stainless backsplashes once and had to figure out how to get even finishes. We found out that direction and orientation of the pad was crucial to getting an even finish.

[@wizrom3046]

@@oldscratch3535 haha now I dont know if youre serious (and giving us cool info) or a master troll playing a prank. 🤔🙂

[@oldscratch3535]

@@wizrom3046 I'm being serious. We tried putting a grain on polished stainless sheet metal and tried a few different methods to get an even result. We found that if you did a pass, then turned the scotchbrite 90 degrees then the next pass would look different. If you did a pass going away from you, and then one towards you, it would look different. It would catch the light differently. If you did evenly pressured strokes all going in one direction without changing the orientation of the scotchbrite then it would all look the same.

[@volkeresper9519]

Super Experiment, danke, Stefan! Ich liebe solche Näherungsexperimente, weil man damit ein Gefühl für die Dinge bekommt, ohne dass man strenge Wisenschaftlichkeit braucht. Danke! Great Experiment! I love those approximations, giving us some kind of feel for material and forces, without the need for strict scientificity.

[@mopedogarage]

Interesting to se the testresults in the end!

[@captcarlos]

Always interesting and instructive.. Thank you Master.

[@tomeyssen9674]

Very nice job...enjoyed this. Thank you!

[@dan4653]

I wonder how much the added mass of the carbide helps damp the vibration along with the added stiffness?

[@jimsvideos7201]

Thank you for the continuing education!

[@diegovianavillegas3297]

We need a video of your new Bema grinder ASAP. Impatience is killing me.

[@StefanGotteswinter]

Working on it 🙂

[@FesixGermany]

The stiffess/flexing demonstration was very nice to see.

[@CapeCodCNC]

Very nice demo! The squinty stuff was cool too!

[@randybartlett3042]

Great video! Thank you Stefan!

[@Anenome5]

That's fantastic. We need to transition the industry to carbide shanks entirely.

[@Maskinservice]

@StefanGotteswinter, I really appreciate your test regarding rigidity of the different materials. The carbide boring bars have another factor to reduce chatter besides being stiffer. They are heavier, and more mass means lower natural frequency and less tendency to harmonic vibrations. I really hope that I got that right as English isn´t my native tounge. 🙂 Btw, this video was uploaded a year ago, but carbide boring bars are nowadays being sold on Ebay and they are not that expensive. But of course, you don´t get to chose what carbide tip to use and you don´t get to make anoter nice video if you buy them on Ebay. 🙂

[@steventyrer7256]

Great demonstration on the rigidity of different steels clear and easy to understand, I use tipped boring bars mainly for rough turning and prefere for fine finishing a HSS insert ground to the correct rake angle for the material being cut, it gives me more control of the finnish and l find it less likely to chatter.

[@timothyparker3954]

Nice ! Well done as usual ! Thanks !

[@mog5858]

great content as always. keep up the good work.

[@Amaysing79]

Thank you very much this was a great learning video very interesting.

[@shichae]

Love this quote: "Stefan: And, I'll have to block you."

[@Tezza120]

So you inspired me to get a deckel clone U2 single lip cutter which is so great for it's price and now you go and get some floorstanding thing haha. Love your stuff and I do a little head dance to your intro music everytime.

[@bigwave_dave8468]

Nice tool hack! -- love your statment: "it wasn't too much work"...ha!..if you have a surface grinder and a cutter grinder :-) also love the practical science experiment. I try to teach my daughter that kind of practial thinking by measuring things and experimenting as much as possible.

[@StefanGotteswinter]

Yeah, I used these machines, because they where the easiest way for me to accomplish the task :) It should be easy transferable to many other classes of shop equipments - The head could also be milled or filed (dont drag the file :D ) at 45° and the carbide blank can be 45° Cut on a benchgrinder with a green silicon carbide wheel and careful checking with a protractor.

[@willi-fg2dh]

my father would have told me "the right filing technique is the one that doesn't take off too much material or otherwise ruin the job."

[@m3chanist]

Exactly right, sensible pragmatism beats petty and pedantic finger wagging any day.

[@poprawa]

I would try to use hard wire brush to remove mess from brazing, angle grinder brush would do fine

[@IrenESorius]

Standardbottle with coathanger at 90mm,, I luv it,, 🥰🤘‍‍. Cheers Stefan,, 🍻😎👍‍‍

[@marcosmota1094]

Hi Stefan, Keith Fenner shared and ole' machinists' trick of taping a block of lead to a work piece or bar that's vibrating.

[@CNC_MRC]

Podziwiam twoją jakość i dokładność. Full szacun.👍👌

[@bcbloc02]

Surprised you ground all that length of flat on both sides as you reduced the stiffness a decent amount by doing that. It does make setup more convenient though.

[@rldoyle5705]

Don`t you have a tractor show go to

[@bcbloc02]

@@rldoyle5705 well the most stiffness comes from the material furthest from the axis so if the goal is ultimate stiffness those are the last ones you would want to remove. Sandvik and Kennametal both preach about using only clamp style holders on their deep hole bars as the screw type on flats aren’t stiff enough. Obviously Stefan got the results he wanted so it doesn’t matter but I thought maybe the info might help someone going after stiffness gains for a job someday. You are right though I should probably just go back to the barn and not comment.

[@warrenjones744]

@@rldoyle5705 this is a curious comment. what do you mean by it?

[@sierraspecialtyauto7049]

@@warrenjones744 He may not be aware that Brian has a Master's in mechanical engineering. Very sharp guy.

[@captcarlos]

I would hope Brian is thick skinned enough to let ignorant comments fly straight past him.

[@walterg4025]

Nice silver solder work!

[@pacomb]

Hello Stefan, great video as always. Can you share brand and model of the grinding machine you have used?? Regards

[@StefanGotteswinter]

The surface grinder? Thats a LIP515

[@bigbird2100]

Great video 👍 Stefan enjoyed the tool modification and I also enjoyed the AVE type of in-depth science experiment keep up with the great content and I am not going to mention your filing technique 😅

[@herrgerd1684]

If only AvE did videos like that... Nowadays he's just sitting in front of a stove rambling about this that and the other. Quit my subscription to him after many years recently.

[@bigbird2100]

@@herrgerd1684 yes less rambling

[@Slipprymongoose]

Bloody brilliant.

[@cncfrezar7510]

So good job

[@philiphoeffer7442]

As always you are an inspiration. Thank You

[@yak-machining]

Can anyone tell me how they do the twisted through holes in solid Carbide rods???

[@perfectionist2032]

Berlin Carbide corporate video english - short version - KZbin kzbin.info/www/bejne/ml65fICuncqSf5o How do they put those holes in carbide cutting tools? - KZbin kzbin.info/www/bejne/eXaZgKuOh9yMndU

[@googleuser859]

Another excellent video, thank you.

[@mith5168]

Nice outcome

[@garyreisdorf1363]

Well done! Also "Files" are consumable tooling.

[@romualdaskuzborskis]

What would you do with the dead file? Throw it out or "repurpose" it? Btw nice one, on pointing out on the flex modulus for hardened/non hardened bars.

[@StefanGotteswinter]

I keep hardened things around - sometimes you can hardmill and grind parts that need to be hard directly from something already hardened.

[@Gottenhimfella]

@@StefanGotteswinter Like, say, form tools?

[@greglaroche1753]

Another interesting video. Thanks. I was just wondering, why you couldn’t use a small stone instead of the file?

[@StefanGotteswinter]

Stones tend to load up with softer metals like the silver solder - but in general, yes, would work too :-)

[@greglaroche1753]

Ok. I think you must have been referring to ruining the file from getting it filled up with silver. I thought you were afraid of dulling it on the hardened steel. That’s why I brought up using a stone.

[@littlejackalo5326]

@@greglaroche1753 he _was_ afraid of dulling it on the carbide, and the hardened steel, to a lesser extent). He wasn't concerned with clogging the file up with silver solder.

[@greglaroche1753]

@@littlejackalo5326 That’s what I was thinking at first and wondered why he didn’t use a stone.

[@mitchellstrobbe7779]

As an engineering student I can most certainly say that the elasticity constant, or Young's modulus most definitely changes between different alloys and heat treatments of steels. In fact it is one of the main reasons heat treatments and alloying is used

[@knickly]

Yeah, but not by much, especially between different treatments of the same alloy. You're not going to find a steel with a 600 GPa modulus.

[@knickly]

Although ferro-tic is really interesting...

[@harlech2]

Wonderful work. You can do all my boring bars like this, but only if you use the correct filling technique and take a shot of Schnapps after you finish each of them while whistling the German National Anthem.

[@richardbradley961]

THANK YOU STEFAN, VERRY GOOD INTERSTING VIDIO. REGARDS RICHARD.

[@najroe]

great work

[@HansFormerlyTraffer]

You file beautifully..."don't block me bro"

[@reinierwelgemoed8171]

Great work man. Thanks for You efforts.

[@DudleyToolwright]

Always interesting.

[@outsidescrewball]

Enjoyed

[@MarkW321]

Nice job, love your videos.

[@imajeenyus42]

How the heck do they mould in spiral channels in that carbide blank, I'd like to know!

[@minchy83]

I would guess it would be EDM machined after the fact? I would love to see how it’s done though.

[@darkobul1]

Considering price of some small boring bars I started using carbide end mills and they perform great likely because of this stiffness of carbide. I noticed you used polished insert on steel, i did that by mistake and got good finish I forgot was it stainless.

[@CraigLYoung]

Thanks for sharing 👍

[@bearsrodshop7067]

Love it when you mesmerize us, and send us off scratching our heads thinking about "deflection" in our sleep (@@)! Thx, don't know about others, but one day I would love too see you and Adam Savage do a "shop made tools" project video together :)> You both are always making improvements to and existing tool (@@)! Bear in TX.

[@sunside79334]

did you ever try sophisticated multifix tool holders for boring bars if they were available for your toolpost size? much better grip than the standard ones and they actually decrease deflection and chatter because they don't work on friction only.

[@StefanGotteswinter]

Yes, I have two of the 30mm boring bar holders - I use them on my larger 20mm boring bars with a split bushing - They are indeed very nice and rigid, but also annoyingly expensive.

[@tridium-go6hw]

Filing is like dancing - different techniques, personal preference. As a local advertisement says (for a casino, actually), You do you!

[@jhawker2895]

Whoever the people are complaining about your file use .... Just tell them to go file themselves .. they will get the message...right before you block them anyway ... Thanks for sharing .. Stay Safe...

[@deangiacopassi1951]

Makes me think of an old shipyard saying - Measure it with a micrometer, market it with a crayon, cut it with an axe