counter boring with a Trepanning tool👌

[@Rustinox]

Thanks David.

[@userwl2850]

I hope things are going well for you buddy. Stay strong. 👍

[@davidrussell8689]

“ let me have a look at the finish , doesn’t matter ,but let’s have a look .” That’s what makes a true master craftsman. Great job , well explained .👍

[@userwl2850]

Thanks David 👍

[@geoffgreenhalgh3553]

I used to machine Tie-Rods ends out of mnemonic SS for the nuclear industry. They were 42 feet long with a dia. X .395"/.402" . They were roller boxed to size on a Herbert 2D capstan lathe. We had to machine the ends to tight tolerance. They made great pokers for coal fires when the scrap ones were cut down. We ran them with the horrid brown cutting oil. This was in 1970. Keep up the good work.

[@CarlHargreavesRustyRelicsUK]

nice to see some large lathes in action, I was only looking up Craven Lathes only this morning. They made some whoppers! A small local engineering firm has just closed here, been going since 1962. I got my bridgeport 20 yrs ago from there, I'm just in negotiations about a horizontal mill, Its sad Britain has lost so much engineering industry.

[@mikebarton3218]

Hear hear! Good luck Rustinox. We are all behind you.

[@ChrisB257]

That's a pretty darned good finish and nice chips. Yes, did wonder about the offset from parallel but within tolerance so, a great fix :) - nice one Dave.

[@khanabdulrehman3913]

Great job David 👍 I Love your craftsmanship.

[@wjb111]

Gotta Love it. Big huge parts being machined with little WCGT 32.52? This guy is brilliant!

[@userwl2850]

WCMX 06T308 inserts 👍

[@johnbutcher867]

I am a machinist. I would like to see some videos on the setup for these huge tools. Centering it? How do you keep it centered in the part as it advances out several feet from the rest? Etc.

[@userwl2850]

Hi John. I've shown this many times on other videos. I may do 1 video to concentrate on that. 👍

[@capin232]

Excellent video brother, nice finish, in spec, and way faster than changing a couple of tools

[@richgage6510]

Excellent video as always David. Thanks for sharing.

[@userwl2850]

Cheers 🍺

[@MrMojolinux]

David great job using your trepanning tool to counter bore provided your still in tolerance that way for required counter bore! With all your available lathes, I would have a second lathe set up with conventional boring bar to finish the counter bore, that way you don't have to tear down your trepan setup, just move the work piece.

[@millomweb]

He didn't appear to be using a trepanning tool for that boring operation. It was not a counter bore !

[@userwl2850]

I have to change the tools for each different hole size. 👍

[@millomweb]

@@userwl2850 Something wrong there - the cutting tool should be adjustable on the end of the boring bar so you can take another cut. Who designed that boring bar - your employer ? ;) Not very good at it, are they.

[@MrMojolinux]

@@millomweb Read the title of this video and watch again.

[@millomweb]

@@MrMojolinux Don't need to. I remember the video of a boring bar in use and the title erroneously mentioning trepanning and erroneously mentioning 'counter boring'.

[@alasdairmunro1953]

Impressive stuff David. 👍🏼

[@bcbloc02]

You possibly could dial over your tailstock same as your cutter to avoid the taper issue.

[@millomweb]

What tailstock !!!!

[@userwl2850]

Yes that would do it Brian but it's fixed 😠

[@ValExperimenter]

I expected the taper but I was surprised it was only 12 thou. Good work.

[@userwl2850]

I got it only because the tool was so long.

[@shawnmrfixitlee6478]

Man that is AWESOME .. Great share !! ENJOYED ..

[@userwl2850]

Cheers Shawn 👍🍺

[@therealspixycat]

Can you show how you align the trepanning bar with the steady rest?

[@Gottenhimfella]

I'm guessing he runs a DTI along the top and the front. It would need to be attached to a suitable shaped block to run along the bed guideways (maybe the inside of the rear shears) though, because the carriage is not available, so it's an interesting question.

[@grumpyg9350]

Very cool!!!! 3:25 favorite.👍👍👍👍👍👍👍👏🏻👏🏻👏🏻🍻🍻

[@cda32]

Holy cow that coolant flow is like the Thames river

[@archerry6457]

But not as dirty as the Thames 😂

[@EdgePrecision]

Why couldn't you move the cross slide of the lathe over the same distance and drive the tool in straight?

[@userwl2850]

Hi Peter. Yes that would work and come in very handy but the backend which was a toolpost is fixed in place with locking pins. I'm going to convert the craven lathe to do Trepanning if you have time to watch any of my videos.

[@aldetitman97]

Master class 👏 🤗

[@alasdairhamilton1574]

Two extra hours down pub then 🍺🍺👍🏴󠁧󠁢󠁳󠁣󠁴󠁿

[@userwl2850]

I'm in now watching Coventry v Reading 🍺 👍

[@sausageseggandchips]

@@userwl2850 'Til the sodding flu rules knock it all on the head at 10pm!

[@TrPrecisionMachining]

very very good

[@knowltek]

How’s your ole machine coming along that you moved in to this new shop your at...?...cheers

[@userwl2850]

I'm currently getting it ready to work soon. 👍

[@gourishtavanandi4753]

How much time it takes for one job

[@CH-pt8fz]

Great job

[@jerrellkull5347]

Utter brilliance!!!

[@userwl2850]

Not really but it worked 👍

[@lwilton]

It looks like the back of the bar is mounted on the cross slide on that machine? Does the cross slide still work? Could you crank the back end of the bar off center to match the offset in the steady rest?

[@userwl2850]

You've absolutely got the right idea but unfortunately it is set in place. I'm currently making a video to show something similar. 👏🏻👏🏻👏🏻👍

[@lwilton]

@@userwl2850 Ah, I was afraid it had been nailed in place. You don't really want the center of those monster drill bits shifting accidentally.

[@kwasg3]

@@userwl2850 I was just going to type the same thing and see the comment pinned... My other suggestion is, instead of moving the nose over, creating the taper from sliding the tool thru the offset steady rest - could you bolt on a wider insert holder tool to the bar, for this job? Making that would let you run the bar straight thru a centered steady rest, and the longer tubes would not experience any taper... And seems that making a wider insert holder once would save you about 18 hours.... Plausible?

[@Gottenhimfella]

@@kwasg3 I had the same thought about the (reverse conical) taper from slewing the trepanning tool. I guess if the counterbore is shallow and not much bigger in diameter than the bore diameter, and the shaft of the trepanning tool is long enough in comparison to the bore, it would stay within tolerance....

[@victoryfirst2878]

Nice to hear you David. Did you reopen your business Sir ??? V

[@RossiDeakin0406]

Are you a Blade or a Owl, personally I've grown a soft spot for the blades of late, ESPECIALLY being a Villa fan and also have a love of Dean Smith an JT.(DSG come a close 2nd though ).. 😄😁 Keep up the great content pal, ido a lot of (xpress Eng) gundrilling oil and gas Work myself so love your work pal, always a pleasure thanks... 👍🍻🇬🇧

[@userwl2850]

I'm an owl Ross. Started on - 12 points this season. 😠 👍

[@garylegge9460]

What is Rustinox having a bone marrow transplant for, just interested Australia

[@userwl2850]

I'd like to know that too 👍

[@garylegge9460]

@@userwl2850 They are not going to answer my query

[@최호순-f3l]

GOOD

[@chrisstephens6673]

Forgive this old brain, i wondered why it was boring tapered for a minute or two but then i twigged, steady was stationary.

[@userwl2850]

Glad you understood 👍

[@chrisstephens6673]

@@userwl2850 it may be old but the brain eventually woke up.

[@Watchyn_Yarwood]

Curious what happens with the slugs?

[@XxBlueSkiesx]

What would happen if you offset it in the Chuck by 4mm? Is that possible? I’m not a machinist, just curious.

[@userwl2850]

Hi. Yes it's possible sure. It's called an off set bore. You would end up with a thick and thin wall if you threw it say..... 60mm .

[@XxBlueSkiesx]

@@userwl2850 oh I get it. So the whole cut would be offset from the centre? Cheers 👍

[@JIWAFATEH]

Hi David How are you , I want this tool for drilling For Round 90mm , 80mm , 75mm outer dia 55mm and 45 mm inter dia 26 inch long

[@lariwoo]

So that's how they made the taper in the iraq super gun!

[@userwl2850]

That was made at Sheffield forgemasters.

[@firebug1166]

lets hope the 40 thou size tollerace.... is not exempt from a 5 thou parallel tollerance

[@TimS366]

A different way of thinking, the difference being that Dave has run his own business and had to pay for the time himself!

[@userwl2850]

Yes you're right... always looking to save time. 👍

[@maverickbaitsmb7790]

pukka mate nice work

[@philipdevonald1273]

Chip master

[@MagnetOnlyMotors]

0:18 is that Ringo Starr talking?

[@millomweb]

"counter boring with a Trepanning tool" Err, I don' think so ! You appear to be boring with a boring bar.

[@userwl2850]

???? It's definitely a Trepanning tool... I trepanned the hole with it first.. not sure what you mean 🤔

[@millomweb]

@@userwl2850 To trepan, you don't have a hole to start with. A trepanning tool cuts the core out, leaving it in one piece. To enlarge a hole as you're doing in the video, you use a boring bar. And that's precisely what you have. There are 2 types of boring bar - static - like yours and rotary - where the cutter is place in a rotating head at the end of the boring bar.

[@emma.j.nation]

@@millomweb have a look at the video again, especially at 1:30 onwards - you can clearly see the tool is hollow, so has space for the solid core it cuts out. That’s trepanning in my book.

[@Gottenhimfella]

​@@emma.j.nation You are exactly right. pmailkeey seems to be confusing the name of the tool with the name of the operation. DW is using a trepanning tool, to do (in the second part of the clip) a (counter)boring operation, exactly as it says on the label. I suppose it does LOOK like a boring bar (although unfeasibly large in relation to the hole) to anyone who wasn't paying attention to the first part of the clip.

[@millomweb]

Well spotted @@emma.j.nation Having looked again, I have also noticed the other cutting tip for the tool - so yes, it does appear to be a trepanning tool ! Used properly, that's going to take one very big cut - in two halves ! Thanks.