93mm hole drilled 70" long steel bar. How hard can itbe

[@userwl2850]

Steel is 4145 H MODIFIED. Not your average steel.. quite tough but chips excellent. 93mm is the smallest tool I can use so I will make one to cut 74mm.

[@ntwadumela_]

What are those score marks on the face of the part for prior to drilling?

[@thedutchgamerguy8580]

@@ntwadumela_ if you look at the trepanning tool, there is a wooden pad on it. He uses a chisel to make those marks, wich cut the wood.(wich is shown in the video) This way the pad fits the bore perfectly and keeps the tool nice and straight. Hope this helps

[@ntwadumela_]

@@thedutchgamerguy8580 understood, so the serrations help to trim the wooden blocks to fit the to-be-bored hole as spacers. Thanx

[@CarlosRoberto-te8st]

Mr userwl usted tiene la mecha mas larga de usa

[@markfoster6110]

He is a smart bugger earns his keep and his beer

[@4GSR]

This brings back memories of my first real job working in a trepan shop in Houston back in the late 1970's. I don't remember the numbers, but recall the shop drilling over two miles of hole per month! They were running over 8 machines with two shifts. I didn't run any of them, I help build the trepanners they had, did a lot of design work, drafting, and making parts for the machines. The company was recently shut down and is up for sale. So sad!!! Enjoy your videos! Keep them coming! Ken

[@userwl2850]

That's really interesting story. Thanks for that. A lot of guys think it's a new process but it's been done for decades. 👍

[@TheEvertw]

@@userwl2850 Neolithic times, if you look under wikipedia ;-) Seriously, someone should add what trepanning means in a non-medical context to that article.

[@top2percent]

“I’m getting good at this.” Too funny.

[@Gottenhimfella]

They say it's better to be lucky than good. But it's even better to be both, eh!

[@metalmanipulator7210]

You have definitely mastered trepanning. You made it look easy.

[@userwl2850]

I was surprised how easy it went.

[@Adam5130A]

You just have an aire of calm about these massive jobs. Though I only play at it at home, I have 3 people's voices in my head when I'm machining. You, Abom 79 and Mr Crispin. Each are top notch and have made a huge impact. Thanks very much for the videos. Adam

[@lathenmill]

I like these videos when he talks a bit more. I get the same sense of calm.

[@userwl2850]

Thanks Adam that's great to hear. 👍

[@CH-pt8fz]

Another great video. I've finished work, I've had me tea, and now sitting in the garden having a drink watching you make that look bloody easy. Outstanding! My better half recon's I'm never right watching work after being at work. Lol

[@userwl2850]

Tell her it's 6 am and that bloke on KZbin is at his own place working on a Sunday..... with no beer... she'll get that you're normal and I'm the mad one. 🍺 vs 😲

[@77thTrombone]

It's a guy thing

[@forrestgumpv9049]

You guys are amazing. We could have used your help 2 yrs ago. We needed a copper alloy pipe 12.5 dia x 86 inches long. We sent it to a shop in Baton Rouge La. They finished the ID and left 3 inches on the OD for us to machine. What a beast to finish. It had a .25 wall thickness when done.

[@Tadesan]

What in the world was it for? Physics?

[@forrestgumpv9049]

@@Tadesan Nuclear/plasma engine test in a vacuum chamber. Never tested, it was a 1/4 scale model. Mars engine that was canceled.

[@_PovertyLabs_]

Indeed, you most certainly are the trepanning master. Here on the tubes

[@joandar1]

PovertyLabs, clever, hats off to you man. Cheers from John, Australia.

[@neilrobinson1956]

Takes me back to my ICI Apprenticeship days, great video 👍

[@bobjames6284]

Gotta love that sound that reverberates through your head and sends the boss running back to the office.

[@userwl2850]

🤣👍

[@markfoster6110]

Why do I find this relaxing ! I've been at work remachining the heads on 366 ss csk cap screws only 500 to go ! thinking why can't the heads be on straight !! .... It brings up the thirst ..... Great job young man !!

[@userwl2850]

At least I have a few hours running time to calm down. You must be non stop Mark.

[@hmw-ms3tx]

You do make it look easy Dave. I have machined 4145 plate on my mill, not sure if it was modified or not, but it was nice to machine. Didn't warp either, very stable. It's my birthday this weekend and with the restrictions here all the beer parlours are shut down. I guess I'll have to drink beer at home with the wife and kids. Have a good weekend. Ken

[@userwl2850]

Happy birthday Ken. Make sure it's John Smith's beer 😉🍺

[@hmw-ms3tx]

@@userwl2850 Thanks, Dave. Is John Smith's a bitter? We don't have it over here but we have a local brewery that makes a really good bitter. It's become my favourite beer by far.

[@MrMikeRobare]

Nice work mate! Old school style!

[@mikewasowski1411]

Nice cannon. Good work. Enjoyed as always.

[@markellis6886]

you make it look easy. I have owned my job shop for 30+ years. would like to give trepanning a try but at the age of 60 I do not have the time -patience or enough beer to make it work. would like to have a beer with you and hear some of your horror stories. must have been a lot of trial and error. cheers from Detroit Michigan U.S.A.

[@userwl2850]

Never enough beer 😉 it's a lot of time and tool making to set up along with adapting a machine to do it. 60? Still young my friend. 🍺

[@markellis6886]

@@userwl2850 after 44 years of this crap the thrill is gone. time to build a bar. All you need is a half barrel and a chair.

[@markneedham8726]

Best of Australian Wishes to you Mr. Wilks. I do hope for your Health and Well Being.

[@dennisleadbetter7721]

I think you have been good at this for quite a while, you're getting very good at making very long holes.

[@williambuxton8223]

Cutting nice, sounds lovely.

[@deepholedrillingspmdrillin3969]

Your master in this dave.

[@hedgerowpete]

brilliant video, loved the idea and the engineering behind it

[@userwl2850]

Cheers 🍺

[@samuelflynn5534]

Love watching these Vids, you really are a master at it. Keep it up 👍🏻

[@userwl2850]

Thanks Sam. 👍

[@carlwhite8225]

So very cool watching you work, nice.

[@userwl2850]

Cheers Carl 🍺

[@p3asant]

I was doing some plumbing at a shop doing this sort of work but on a smaller scale and was amazed at seeing the swarf come off the drill in one piece

[@chrisstephens6673]

Damn right you are getting good at it. Must be a pleasure to do "ordinary" alloy steel after your "exotics".

[@userwl2850]

This was much easier with the tool having the support pads Chris.

[@francoishuber8990]

Bravo, you are the king

[@ChrisB257]

Challenge?? Heck man, 70" length looked beyond a challenge! Yep - gorgeous chips.... much kinder than Inconel.! Inserts seemed to do well. No doubt Dave, you really are getting good at this :) :)

[@userwl2850]

Getting there Chris... only took 30 + years. I'm a slow learner 🤣🍺

[@gazcrx]

i made many tripanners and used to make the inner and outer cartridges

[@davidoleary2452]

top work as always fella, no nonsense machining here

[@Miniatures-And-More]

Superb , I Have Seen massive Machines but never seen this deep boring , Where is that part used

[@rosco3659]

Man I can hear this chips breaking .... so nice !!!!

[@ahmedmohammed8716]

Awesome...how do I calculate the speed and feed to get a smooth surface

[@theessexhunter1305]

Perfect ID finish...glad you are working nowt my way.

[@martynfrench7187]

How satisfying when the coolant sprays from the chuck on breakthrough.

[@paulperrin2152]

I would like to see a video on how you do the boring from start to finish

[@friedmule5403]

I would really like to see a video where you show us how you set up before drilling. I have to be extremely precise to drill perfectly, and more so if you go from both sides.

[@bmdbigfeet1031]

Is there anything more beautiful than finley machined metal? I think not.

[@alasdairhamilton1574]

Never cease to amaze me👍👍🏴󠁧󠁢󠁳󠁣󠁴󠁿🍺

[@userwl2850]

Piece of cake this turned out to be. 👍

[@alasdairhamilton1574]

During the video Could you tell us what it is going to be used for if is not confidential. This one might thick wall and quite short!!

[@enriquedemaria5071]

Cuanto tiempo dura la perforación. Se utiliza el mismo proceso pará hacer otra broca . de más diámetro. Saludos León México. Me agradable video.

[@Dineshkumar-tl6yd]

How the tool holder is moving forward? it is fixed in tailstock right

[@davidrowland2834]

Good luck to him. Used too work on lathe that size

[@bcbloc02]

I would love to give this a try sometime on my big lathe. Not really worth building the tooling to do it with though to save 2 or 3 bits of material. I am not doing super high dollar exotics like inconel. Do you know what they are doing with those big pieces? Some kind of turbine work I would imagine.

[@userwl2850]

Inconel 718 is used in the gas and oil field to withstand the pressures involved. It's always a bit of a joke when they leave as the workers guess which sea bed they will go to.

[@brianbob7514]

Beautiful

[@michaelric3540]

What’s the difference between using water versus oil as a cooling substance?

[@userwl2850]

Water keeps it cooler than oil.

[@michaelric3540]

David Wilks sometimes I see oil used as a coolant. Is it because the max cooling capacity is not needed or are their other reasons? Like being quenched slowly?

[@wings808]

Wow, I couldn’t polish the bore better than this! That’s awesome! What’s the padding material if you don’t mind telling, please?

[@userwl2850]

It's called ... tufnol... 👍

[@wings808]

userwl2850 ok, I’ll look it up, thanks

[@PhaseConverterampV]

Ok, looks good. I’d like to see how well the bores concentrically match at the 24” depth. Likely pretty good if you hit your tolerance.

[@userwl2850]

I've covered this on previous videos. Boring by Trepanning can not "run off" only cut a bigger or smaller hole. It's just another benefit of Trepanning.

[@PhaseConverterampV]

Ok. Thanks for info. I was told by a respectable machine shop owner that gun drills very deep bores that the only way to keep the bore straight, with respect to OD, is to turn the work and turn the drill in opposite directions ( obviously ). Just not sure about if the equal rotational speed matters. If you are always getting straight true bores, that’s very interesting knowledge. Thanks for sharing.

[@gazza116]

give you a 10 for that one,really good at it now

[@userwl2850]

30 years it's took 🤣😂

[@gazza116]

just imagine how good you will be in another 30.

[@dennisleadbetter7721]

@@userwl2850 good things take time!

[@innleadair]

Never seen this done before. I like the sacrificial wooden? support pads on the tool. How is the tool feed done? Powered long travel tailstock?

[@userwl2850]

The support pads are made of tufnol. Works really well. 👍

[@innleadair]

Cool ! What about the tool feed? I can't imagine you've got some spotty apprentice winding the tailstock handle ? or is it shown in another video? I'll binge watch whatever else you have posted tonight....

[@innleadair]

Turret lathe...

[@jamesg2987]

Do you adjust the insert cartridge to bore to final size.

[@userwl2850]

Yes it can be adjusted.

[@tonywright8294]

What is it for ?

[@theq-1]

Is there a huge drill in the middle of the boring bar or something or was the centre cut somehow else? like the cut core goes in the boring bar ?

[@59jm24]

Do you have more info about reboring holes seamless tubing ? What does the tooling look like?

[@userwl2850]

I have a few videos where you can see the tools used James.

[@mattblack9069]

Well done.

[@SuperJonatan100]

Ik everyone has said but you are a master treppanner

[@userwl2850]

Like I said... I'm getting good at this 🤣👍

[@perceive8159]

So your basically screwing in the tailstock quill in by hand to the end of the stroke then rewind and then advance the tailstock each time? Or are you pushing the tailstock? 😎

[@Convolutedtubules]

They don't make this material in hollow round bars?

[@kar9sk]

great looking chips!! 41XX series really likes to be crowded huh mate?I really enjoy your videos man!

[@markmiller6402]

That was clever, putting your hand in there

[@grumpyone5963]

A pierced ladle would be a great tool for that.

[@rightthen.3243]

Amazing isn’t it? If you put your hand near moving objects, nothing happens at all!

[@williebulletman5217]

You do make it look easy even though we know it’s not

[@toshockamazeandamuze8531]

did you have to change inserts??? YOU ARE GOOD.

[@427yenko67]

We use to do this with a spade drill through the middle of a turbine rotor.

[@aaronkerr749]

How did they make the old cannons?

[@brentbarnhart5827]

I GOT THINGS TO DO! (But damnit, before I go back out to the shop had to watch this..... LOL)

[@BruceBoschek]

The Fred Dibhah of the big bores.

[@dave-in-nj9393]

First, AWESOME that you made those long tools. Cut at the same depth, very impressed. the rope made me laugh. I used to use magnets on the 96" vertical boring machine to cut the chatter. But now the question. How close is that match line on the bore ? and a follow up.. do you do any other finish work on the bore ?

[@userwl2850]

The bore always matches up.. that's the other good thing about it. It can't "run off" only cut smaller or bigger. 🖐

[@ianmoone2359]

How will you rifle this barrel - button rifling or cold hammer forged around a mandrel? Just curios! 😉😂😂👍🇦🇺

[@kisspeteristvan]

What was the finish boring tool like ? also a balanced cutter with step cutting ? . That cut went almost too easy :D , you must cut some nasty alloys to get a challenge , cheers man .

[@userwl2850]

I'm making a video on all the inconels.

[@kisspeteristvan]

@@userwl2850 I've seen almost all of your vids, it somehow relaxes me . I uploaded not so long ago a clip where i drill with a 60mm indexable drill . Check it out if you have time .

[@r6chrisk]

What’s that for by the way?

[@userwl2850]

Gas Pipe I think🤔

[@perfectionist2032]

Mr Trepan, If the part is longer than the tool & the tool has no bearing pads, what is better 50/50 both sides or 33/66? id est, more core length on the break through plunge.

[@chrisyboy666]

Nice finish on that steady band 😂👌

[@guypatts494]

Howitzer barrel nice

[@superal1008]

Quality work again.👍 Do you always use the same grade of insert no matter what material you are cutting ?

[@userwl2850]

No. You've given me an idea to make a video showing different grades. Cheers..good question.

[@superal1008]

Great stuff I look forward to seeing it 👍

[@abdullashaballa3197]

How much drift over the 46 inch? I have a project need 48 cylinders drilled and honed for high precision. What is your email? I will send part models.

[@catabaticanabatic3800]

One second ringing,next second singing . Nice job.

[@userwl2850]

It's a good sound as I know it's cutting. 👍

[@catabaticanabatic3800]

@@userwl2850 Yep. She'll always tell you when she's happy. And like an angry woman, the whole neighborhood will know when she is not!

[@davidbuck6976]

David, do you have to support the core section from the first trepanning operation?? We used to use a made to size thick recessed plate to hold the other end of the core in place in the chuck after turning the piece....

[@sighpocket5]

As always....Nice!!!

[@doctormcgoveran2194]

wow you are feeding that fast huge chips, what is the tolerance on that?

[@bagheadbaby]

When you turn it round do you change the wooden bushes?

[@userwl2850]

No... no need as already cut to size from first half.

[@leso204]

Boring bar not a trapan yes ??

[@userwl2850]

Trepanning and boring after.

[@leso204]

@@userwl2850 Got it' cuts a solid slug out like a roto broach bit for a mag drill ........

[@mohamed19803]

That's really great work. It's the biggest hole with high quality length. But is there a deviation from the diameter on the other side? It's me. Thank you, my friend. I wish you luck and success 👍🙂

[@userwl2850]

No. This is always a true hole.

[@glencasson9046]

Superb as always Dave, what`s the RPM on that? You will be able to raise a glass to Mr Smith one year..... I hope?

[@userwl2850]

It was at its max 275rpm. Fast enough with no heart in mouth moments. 😓

[@karlhrdylicka]

Hello Dave, what type of steel bar is this, certainly appears to be cutting far easier than some of the material you have taken on.

[@userwl2850]

4145 H MODIFIED. I forgot to mention that 😐

[@grumpyg9350]

Amazing. 👍👍👍👍👍👍😷

[@pauldavidson6321]

Nice chip control very impressive 👌.what metal did you use for the trepan bar ?

[@userwl2850]

They are made from EN24T.

[@engineeringsolutions2376]

Machine name and drill tarett

[@userwl2850]

Lang lathe

[@mikeram2000]

Muy bueno ese taladrado es realmente barbaro

[@ripsumrall8018]

It's all about the coolant. Man

[@jamescampbell7780]

So what is this for? Clever stuff, however!

[@userwl2850]

Gas pipes.

[@nagendrahindustani1429]

Sir i want make this boring technology but how can i make so can you give me it's drawing Pls

[@deepholedrillingspmdrillin3969]

What is the core size?

[@userwl2850]

54mm core.

[@josephinebennington7247]

Why are you drilling this piece?

[@CMAenergy]

Everyone comments on how good this is. But I'm disappointed you did not show the most important part, the set up and explaining that which your boring out procedure etc Anyone can watch a round with slight defects turning and a boring bar going into it, But you know the most important parts were left out, Besides the sound was barely understood, to much back ground sound effects

[@christopherdean1326]

Before I even watch ths video, I'm going to guess.........Very hard indeed!

[@landlifem5872]

Watching a trepanning video while I'm trepanning inconel.

[@userwl2850]

What size can you do. Is it 718?

[@landlifem5872]

@@userwl2850 Most the time I do 200mm, but got a new tool in last week for 280mm . Yeah usually it's all 718, seems to be most common inconel we use

[@GaryBlankenship96b40]

To get the hole uniformed and no wobble at 64 inches is difficult

[@fokale]

But why don't you ever show the starting moment in your videos? The touching of the tool part?

[@userwl2850]

First I have to make sure the tool is in line by starting it in. You've given me an idea. I will show how to do it. Thanks for that. Maybe a few videos time as I have some already. 👏🏻👍

[@fokale]

Thanks, and as a viewer, it's the most exciting part always.

[@Hendreh1]

Buliding a Canon?🤠

[@userwl2850]

💣💥😉

[@Hendreh1]

@@userwl2850 dude your KZbin Channel is realy nice. I Like to see the crafting of custom drills and stuff. I once build a 5 flute Cutter to machin outer Diameters of Long shafts. I used hss bits with some reginding it served me 3 years and many shaftends. 🙄

[@ianbresnahan1808]

Did you bore the ID full length in one go?

[@userwl2850]

Hi Ian... yes.. straight through.

[@ianbresnahan1808]

userwl2850 next time you have to do this after a trepan, could you film setting up the tool? I’m curious what kind of tool can bore that long. Another great video. Thank you💪🏼

[@BeachsideHank]

You lot really are quite mad you know. I love what I see.☺

[@userwl2850]

Cheers buddy. Being mad does help 😉

[@TheMetalButcher]

Still doing work at your home shop? This looks like an industrial place? Machines are clean for once haha.

[@userwl2850]

Yes.... I'm here now 6.30am Sunday morning 😣

[@ovalwingnut]

Don't want to micromanage but I just would have purchased a tube to start with. Graingers or McMaster Carr have never failed me. You're welcome 😉