Speeds & Feeds for Steel on the Lathe! WW171

[@bradjunes1610]

I grew up (55 years in machining) with "Stelite" tools. "Heat the part up till it's red and start cutting" the old timers taught me back in 60's. Weld it hot and start cutting. Finished with all types of tools after straighten of boat shafts etc. Wish I had cameras back in the day before carbide you would see lathes of the 1940s doing awesome work and even to this day.

[@billdoodson4232]

I'm not a machinest, but have used machine tools and been responsible for purchase of tooling for them as part of my job as the Chief Engineer for a number of maintenance depts, mainly in the food and drink industries. I did quite a bit of research about 30 years ago on what might be the best all round tools and decided on the button and triangle inserts as being the ones that would cover most uses and be cost effective in an envirionment were we could be cutting 304, 316L and hot rolled mild steel within the same day. I still use these same inserts in my home workshop today and have to say that Sandvik have never let me down. Its nice to watch a video with a couple of real machinests, confirm that the choices I made as a total non expert all those years ago, were pretty well the correct ones.

[@Steve_Just_Steve]

This maybe my favorite video you've ever done. Paul is such a nice guy for helping you share this with us. Would have been nice to get a better look at the inserts themselves like maybe some closeup shots so we could see what the chipbreakers looked like but great post John, really enjoyed it and can't wait for part 2.

[@nyccnc]

Steve - thanks, and agree - we'll make a better point to do that when we film next time.

[@Pow3llMorgan]

Paul is an excellent teacher and John, you acted the virtuous student very well, namely with the intermittent chip sweeps :P But seriously, Paul is like machining god.

[@antonmursid3505]

Antonmursid🙏🙏🙏🙏🙏🇮🇩🇮🇩🇮🇩🇮🇩🇮🇩✌👌

[@meocats]

give Paul another episode on drills in the lathe, all types of drills. he's the man!

[@bigbadbugga]

Thanks guys, I've learnt more about insert tooling in the first 14 minutes of this video than I learnt from 4 years of watching youtube machining videos.

[@fredrosse]

Me too, and been machining stuff since 1960

[@jakegiubbini]

Thanks guys. I saved this video and refer back to it frequently at work. I shared this with my old machine school instructor and he now shares it with his classes.

[@floridasaltlife]

Paul is the very best of dudes !! I love this guys disposition, The way he shares and teaches at the same time is incredible. My lathe is smaller at a 12x36 2hp and sized right for my needs in scale model engine building but the concepts are scalable and the same. I really learned here. Million thanks to you.

[@jorgefernandez184]

As a machining student, thank you! These long videos with thoroughly explained details are incredibly helpful and educative. I definitely commit the typical beginner mistake of taking too light of a cut, haha. It was shocking for me to see cuts that are like 4 times deeper than what I usually limit myself to. Anyways, thanks once again John and Paul, excellent content. Cheers from Spain!

[@michaelawuku1241]

I really like how the old boy response to the questions. He don't rush to answer a question. I hope he works the same way

[@larrysperling8801]

one of the best tutorials i have seen on carbide tooling. now we need a similar one geared toward the lighter home shop lathes. great job looking forward to the next installment

[@wheelman007]

Just wanted to say thanks. I must have watched this video 20+ times for a reference.

[@michaele1201]

Hey John, Awesome !! there is a lot of wisdom introduced to the viewers in this video. Paul 's experience and your "curiosity" and ability to ask intelligent questions is a great combination. Well done!!

[@nyccnc]

Thanks!

[@cffellows]

Started out thinking OMG, and hour and half, this has got to be boring. Turns out, I watched the whole thing, and completely lost track of time. Great Video! I've long been familiar with Mr. DeBolt from his model engines./

[@nyccnc]

AWESOME!

[@bschurg3588]

Oq

[@mrechbreger]

I like such videos, it shows people who really like what they do and try to get into the details. On the other side I know people who only do what you tell them, and when they're getting older ... they're getting lost because they have no one guiding them anymore.

[@jimsvideos7201]

Good on everyone who had a hand in making this! If you need SD cards I bought a heap for a vacation that didn't happen, you're welcome to a couple of them.

[@someoneelse7629]

Really nice to see that you both liked Sanvik inserts, when I did my last machine class, it was all Sandvik inserts, the perk of living in Sweden before international shopping and sorting for cheapest was the norm. But I talked to guy working in production recently, they still use all Sandvik, it is still cheaper in the long run since they last much longer then any thing else they have tested

[@r.j.sworkshop7883]

Thank you John and Paul. I just got done watching this for the first time. Next time will be with a notepad. Your timing is excellent for me, I am expecting my new to me 16x40 in a few weeks and I have had my nose in every catalog that I could find reading up on insert tooling. Also, I noticed a round insert tool holder in the box of parts included with the machine, and I thought that it would be a novel little tool to have, now I am certainly going to take a much closer look at it. Great work and as said by others, I couldn't believe that 90 minutes went by so fast!! R.J.

[@ypaulbrown]

Very informative... didn't think I would make it all the way through, but after a few minutes I knew it would be great. I ran the same model lathe for over a year...made many unique parts. Well done Paul and John.....cheers, PB

[@racekrasser7869]

I would love to work with and learn from this guy. We need more people like him in this world.

[@Dr_Xyzt]

This is a cool video. The clink of metal chips is satisfying in a way that's similar to bullet casings, but not as much work.

[@johndebrular979]

To really appreciate the ability of this shop and Paul you should have known his dad. A class act. Located near Zanesville, Ohio.

[@vliberal]

Awsome, i hope you find time to continue the comparison video, i am super excited to see the stainless.

[@richbuege6491]

In my small machines, I don't use carbide, but HSS. Most of the steels I use are tool steels, with some exception. 1045 , hydraulic cylinder rods, of course hardened, chromed, but I got them for cheap. Watch the speeds, don't let it get too high, keep the feed reasonable, use a junk tool to get rid of the chrome and don't be trying to take .002 or .003 for a finish cut. Leave .010 or more and it works better.

[@ZPositive]

Wow, so much learned in just one video. Absolutely top notch content. The very reason KZbin was created right here.

[@nyccnc]

Thanks!

[@DavidHerscher]

This video is freaking legendary. I just learned so much. I'll be watching this at least 50 or 60 more times to soak in all the info.

[@glennedward2201]

Interesting all the steels I work with. At times it cuts like butter and other times I think I have different material than what’s labeled. One of the issues I’ve ran into is the use of hot knives to cut these larger end drops off can often harden the material making it hard on one end, both, or inconsistent overall which can make machining on a lathe a pain. I have found on the vertical mill I can cut it in any mix of the above without much issue. It’s good to hear what others are doing it only expands the workability.

[@billdlv]

Great info, just like the aluminum video a while back. I was able to follow along but it would be helpful to have on screen the parameters for each cut like rpm / feed rate / DOC or at least show when one is changed. I'm going to have to get a round insert toolholder.

[@nyccnc]

TBH, I tried to do that and just couldn't keep up. Not a great excuse, but it's something I have never been able to do well when visiting someone else's copy to film/learn

[@BradleyWilloughby]

There’s something so satisfying about watching a manual machine make chips compared to a CNC.

[@PurityVendetta]

That Mr DeBolt, one smart guy. Fascinating video, although I work everyday on one off type jobs I learned a lot. Lots of subjects to think about. I'm going to have to watch this a few times to take it all in. One thing that drives me nuts is that the WW2 EN system of steel types is still in use here in the UK. I have to cross reference all the time.

[@TheWidgetWorks]

So far so good, I should send you some C275 or some inconel 625 so you can show what a massive difference there is in materials.

[@nyccnc]

I'm great at machining Inconel. In CAM.

[@Andrewlang90]

@@nyccnc Late to the party, but Incnonnel surface finishes beautifully, but like EN30B, it’s incredibly abusive on inserts and tooling in general

[@doug3458]

Great video, highly informative. At 1.14.20, the cranked tool with the round insert is a right hand tool, not left hand as stated. The hand of a tool is determined by looking at it from the cutting(insert) end. Lets say you required a raised feature in the middle of the part using cranked tooling, you would cut the right hand edge of the feature from the end nearest the tail stock with a right hand tool and the left hand side of the feature from the end nearest the chuck using a left hand tool.

[@ronaldwhite5887]

Well done, thanks I learned from your video that some cases you may not to break the chip completely if it is flowing out of the way into the chip pan. I used to grind a small radius on the top side just behind the cutting edge to allow the chip to break off into small pieces to avoid the “ birds nest”.

[@bostondan77]

Editing in your videos is top notch. Thank you.

[@rlockwood2]

negative tooling can have positive, neutral, or negative rake.. positive tooling can have positive or neutral rake. Seemed like there was some confusion about that right about the start when this was being discussed. The two are related, but also not.

[@Sketch1994]

An insert can be neutral or positive depending on the clearance angle. The rake angle can be positive neutral or negative independently of that, but it is compounded by the toolholder angle which can also be positive neutral or negative(can't use a positive angle holder with a negative insert though). It's rake versus clearance.

[@jnelson4765]

Talking about the right insert for the lathe, I've been using Sandvik TNMG 222 inserts with my little 7 x 14, and they're some of the only inserts I've found that do a proper chipbreaking on cuts as shallow as that poor little thing tan take. Not everybody has a 20 HP turning center, and with limited horsepower or rigidity, finding inserts that don't beat the crap out of the machine is hard sometimes...

[@shadowdog500]

Thanks for the tip on the insert for smaller lathes. Chris

[@nyccnc]

AWESOME! Yea, I can't believe how that "T" style performed!

[@shadowdog500]

Jim, Can you post a video of that insert breaking chips on your mini lathe. I'm sure a lot of people with those smaller lathes would like to see that. Thanks, Chris

[@aeromech8563]

Guys I have watched hour after hour of you cutting steel n feeding n chipping Fkn awesome man I'm setting a private shop up when I'm back home in Australia I have learned so much tech shit from you thank you so much for your great videos and interesting tips just letting you know how great it is to watch engineers at work. Cheers Phil. Ps I'm an aerospace engineer and can't get enough of this content 🛠😎🇦🇺

[@FrustratedBaboon]

Paul has so much knowledge about lates. Very Impressive.

[@RayLautenschlager]

As to the comment about carbide manufacturers doing in-house testing, yes they do but often they look for field reps to dod comprehensive field tests to gather more data. Even after a new grade and chipbreaker are intorduced data is gathered. When I sold for Stellram I used to test new inserts in the field in situations that were not suggested.

[@eliascastillo1641]

Great video. Problem I’ve had taking Huge cuts like that is the material might actually start pushing back into the chuck if you can’t butt it up against the jaws.

[@glenkelley6048]

THANKS SO MUCH GUYS, for knowing what you are doing. Machine tools make our world go around, and YOUR KNOWLEDGE and SKILLS make that possible. 'God Bless You BOTH!

[@MrRctintin]

Great video, thankyou. I’d love to spend a few months working with that fella, he sure knows his stuff!!

[@sanforce]

Planning on turning steel for the first time today ... great timing on the video!! Thanks.

[@thomaslamora1679]

This video wasn't what i expected... but it is amazing the "walk around" knowledge that some people have.

[@elcuhhh8761]

These types of machining videos are my favorite

[@JustTheToyStuff]

Hi! I'm looking into taking CNC in school. Thank you for this video! Very informative and professional. Are there any professionals in the chat?

[@themotofix5705]

I hope to be a fraction as knowledgeable as this master machinist, one day.

[@shiro-r4m]

I love it when you visit DeBolt

[@MegaLostOne]

Thanks for the video. I am mainly cutting 1144 and 4140 with some 6160 added in with M2 HSS, no gear box so feed/speed isn't a quick change. While I am new to the lathe and using a 6" lathe (Atlas/Clausing) with a track record for gib issue's and mine has some heavy wear on them. I have been using HSS because my lathe just doesn't seem to be a fan of carbide tooling. I replaced the lantern style tool holder with a steel QCTP also to try to make it more rigid and I am replacing my cross slide nut next week to remove some of the backlash that I believe may be leading to my issue's as well since the positive rake will want to make it pull into the cut, lathe is bolted down to a heavy wood bench and there is very little flex. After watching this video, and if I am understanding this correctly, I can see some of the issue's I have been causing myself when shaping my HSS which has been grabbing or digging into the cut. I think, again if I am understanding this, I need to put a negative lead angle and a positive rake with a decent radius on my tooling to help where I have weak gibs for roughing and then I will change up to a set for finish passes with a smaller radius/positive rake and play with a neutral to positive lead angle or at least not such a negative lead angle. One other thing that has really helped is I believe where I have been leaving such a small radius on my tooling that it is affecting the finish as well as making it easier for the tooling to want to grab/dig into my work piece. But who knows at this point I could have it all backwards, again I am new to this and wanting a heavier lathe but it's just not in the cards for me at the moment so I am trying to do anything I can to help the lathe and ease the process.

[@martinda7446]

This was magnificent.... I just want to add another 20 alloys... And... I'll check the playlist...

[@FredMiller]

Great stuff! I am going to have to watch this a THIRD time to really absorb it. Thanks Paul and John for taking the time to educate us. I am really looking forward to the next segments. All the best.... Fred Ontario, NY

[@itsmebernie]

This series of your videos is some of my favorite content of yours! I play them over and over to try to make it all part if my thinking. Thank you!!!

[@KenToonz]

John, this is a fascinating series with lots of useful information. However the parts I make on my Slant-Pro are much smaller (1" diameter aluminum or less) and don't allow the types of aggressive cuts shown here. Therefore I end up with ridiculous bird's nests. A video on how these techniques can be applied to smaller parts would be appreciated. Keep up the great work!

[@BeaterJeep]

I started watching “1018” and a portal to hades opened in my kitchen…… lol seriously, great video!! Thank you.

[@mustbejoking]

Awesome just pointed out how much i dont know explained alot of issues that i encounter...thanks paul you are good at what you do

[@damionparson247]

Super video! Answered a lot of my questions that I had about inserts.

[@outsidescrewball]

Long video and thought NO WAY will I watch....DAMN...couldn't shut it off...... THANKS.....so much information...awesome

[@Tf9500]

That hour and a half went quick, great video with lots of hands on knowledge. Adding to my favorites, Thanks for all you do👍

[@rashesthippo]

new intro, lathe video, hour and a half. WHAT CHANNEL IS THIS?

[@nyccnc]

Literally, LOL

[@sandeepnepal2064]

This channel is underrated AF

[@PFSDUDEK]

Great to have two really knowledgeable guys together.. I remember NYC CNC starting out... But i do prefer manuel lathes and Mills. because CNC are not human machinists.. I am.. But great video guys thank you...But remember the average guy ! the mere mortals..Ha..

[@anthonyquarrell9068]

What a guy! He'd make a good master for a lucky apprentice.

[@rosewhite---]

a 3 jaw chuck with soft jaws will be very quick and easy to use and keep the part in place for heavy fast cutting.

[@glennedward2201]

My biggest struggle is parting. Avoiding chatter while parting is also challenging. I have a vfd and larger 13” x 36” and I have to gear it down and run it as slow as I can. My bandsaw hates cutting steel it’s a small 4x6 even with m42 blades the large 4”-5” rounds are unwelcome. I also found its much softer toward the center and it then starts smoothing out and curling up the chips. When I start the chips are more like death slivers.

[@JShel14]

So much knowledge dropped in this video. Thank you so much for sharing!

[@Sketch1994]

A machinist friend of mine has a 15kW(20hp) and a 20kW(26hp) lathe...The only thing that limits the roughing is the toolholder grip. I've seen it and I can assure you that it's pretty scary when you try to take 20mm diameter at 1400rpm with a blazin fast feedrate out of a 40kg(90 pounds at that point of the process) shaft and you see the freakin toolholder starting to twist out of the toolpost! PS: There are standard ISO carbide grades, but unless you frequent old machine shop auctions it's unlikely you will find one, even though they are quite good. Also the best manual lathes you can get are Bulgarian ZMM's...Really heavy duty machines, that usually go up to 2000rpm's and most machineshops swear by them!

[@mryoutuser]

Amazing video indeed, so much great info in one video. I think It would be much better if you mention the full name of the insert, the effective diameter of workpiece and maybe the current consumption of the machine so we have a real indication of and a reference kind video for (tools and materials).

[@Hunter_S-fr4ns]

This is ACE!!!… just got yourself a new subscriber 🇬🇧

[@xtiz]

This guy is awesome, like a father. Love it 😊

[@troutfitter547]

I wish this guy was my next door neighbor.

[@jimmilne19]

Really, really helpful video. Super useful. Thankful here for the fine instruction. And, Paul, totally impressed with your knowledge and clear explanations. Thank you!

[@melchvanleeuwen2166]

wow what an amazing video! thanks guys i took alot from this.

[@ranchis9044]

love when you said .. now thats a great Abom chip

[@shadowdog500]

Great info!! I'd love to see someone do a video like this for those of us with older lathes with less that 1HP, like my old MSC 11x36 belt drive lathe. Thanks, Chris

[@nyccnc]

We're going to take what we've learned and apply it to our Tormach lathe!

[@shadowdog500]

Thanks! I can't wait to see the video. Chris

[@dorsetengineering]

Hss tooling on vintage stuff in my experience...

[@rickcperry]

Watched every minute!!! He don't need no stinkin cutting oil.... BAD A$$, One of the best vids out here on the Tube!

[@jaypierson5955]

1 word about the educational content in this video: Goldmine!

[@nyccnc]

Thanks Jay!

[@samjadaci]

John, its a very informative video but its missing one thing, when you did your last video at debolt S&F with aluminum., you add a caption OSD showing the numerical values of SFM, DOC etc., as a metric guy it's a bit difficult to understand imperial system. That caption screen would had made much easier for me to understand.... Anyways g8 work.. 👍👏

[@904justify]

These guys have done awsome job explaining this stuff

[@Rx7man]

Excellent video, the only thing that would have been nice to see is the effect of the change in lead angle using the same insert.. going from the standard CNMG to the "odd side" CNMG holder would probably show it nicely :)

[@sushmitshetty8926]

Namasthe sir.. which turning insert is good for turning of INVAR 36 alloy forged bar. Please guide me.

[@DIRTYTHUNDERCUSTOMS]

I really dig these kinds of videos. U rock

[@nyccnc]

Thanks!

[@TheJohndeere466]

I used to run An american duplicating lathe and we were roughing out 8" x 48" 4140 shafts and we were using kenametal tnmg 542 inserts at .375 radial depth of cut at .032" feed. The machine had a 30 hp motor

[@denniss6317]

really good Video, i´m learning as a cutting mechanic here in Germany, dont know if its called like this in english. And this helped me a lot to understand it again better than before :D Thanks for that.

[@sunppaa]

Good stuff! Looks like the 4140 moved in the jaws during cutting though!

[@jackjordan7691]

This is so informative, thank you. Fun to watch.

[@tannerhoward5974]

Awesome! Showing people you can push a lathe instead of talking forever like many do.

[@jesseskellington9427]

Do you have a video of taking square stock and turn into round stock with a drive dog

[@jeffcrossler3186]

you should tell people about a book called engineering black book it has all the info your talking about ...i love this vid keep up the great work

[@louiskeen8475]

Thank you gentlemen for this explanatory video!

[@nyccnc]

You're welcome!

[@johnlintorn6768]

Fantastically informative video! What can I do to chip break if I have a small boxford home lathe with only a 1hp motor? I can't take deep cuts with high feeds to break the chips. And as you said I don't want rubbing on my ccmt carbide tips. Any suggestions?

[@anthonyambler9688]

Really interesting the one that really surprised me was the radius tool I wouldn’t have thought to use that like that

[@christianfeldmann8287]

What are the inserts ? Cnmm or cnmg dnmm or dnmg or heavy rhoughing inserts?

[@jesseskellington9427]

Do you have one of these using a dog driver taking square stock and turning into round stock or into a part? 😊

[@tsstsstsstsstsstss]

I didn't know Colin Mochrie did machining! Awesome video, John. Thanks!

[@johnnym1320]

awesome video! Paul is a wealth of knowledge!

[@davidklainer9218]

I only work with super alloys and Duplex as well as super Duplex and some of those alloys it is impossible to get Brack chips. Grate video

[@dirtyfingernailsauto8946]

It is finally nice to see John doing what I know he absolutely does best ....... Janitor , sweep that floor boy ! while the people with REAL experience do some work

[@impactodelsurenterprise2440]

Is it normal for the insert tips to glow and sparks flying when turning? Also should you be using coolant when using inserts?

[@drienkm]

Thanks so much for doing this. I'm learning how much I didn't know about turning!

[@larryschweitzer4904]

Thanks, interesting results. Beefy for a 16" lathe!

[@hiteck007]

Very interesting vid Lads. I got a 3 hp 3 phase engineers lathe and stuffed if I can get it to chip like that ever. Even if I get aggressive like that, still got birds nests. What's worse my finish on all cutting tools is Rubbish, I usually end up filing it to get a good finish. I can't figure it out. The lathe I got hasn't done bulk hours either though be it old @ 25 years old. All the tooling came with it & the original owner complained of the same things, So maybe it's a tooling compatibility issue I'm thinking. Any ideas mate would be greatly appreciated, oh and we don't get Reps driving through as in Australia is too big unless you live in a big city which I don't. And what's your recommendations on material to make model engines?? for instance

[@xmaswitguns]

These men are a wealth of knowledge!