Standard grooving chip for MGEH style insert but I find on internal grooves raising the tool above centre line makes it chip better on hard materials

So glad i found this channel. Really looking forward to the next videos!

Excellent video. Cheers from Canada...!

Hi from the expat Aussie in the UK, Great video.

Sometimes you just have to say " bugger, just peck it" just found your channel and I love it. I too have resorted to regrinding custom chip groves but I must admit I have NEVER done work the size you buggers are doing. Your tool rep will be happy to sell you all sorts of solutions, I am sure! G'day from Tasmania

Hi Just discovered your channel. It is great. Like the camera work and that you explain what you’re going to do. Great attitude and no ego 👍👍👍 NSW Australia

Re chip breaking with the internal groove my thoughts are increase feed rate to .2to .3mm/rev maybe even more.,and drop surface speed by 10-20%, apply raw soluble oil with no water added and if that fails assuming you have minimized overhang turn the bar upside down and run the spindle in reverse, however the thinner the material is getting out from the iD of the groove to the od of the part the vibration will work against you, another trick is to do the grooving and boring before reducing the OD so the work is more rigid, skinny sleeves squeal and the tool height fluctuates and does not relieve the material at a constant rate, just keep trying heavy feed rates and even go under 120m/min, the answer is in the fine tuning, previous comment about adjusting tool center height has a lot of merit, especially on 431 SS. Condition T 4140 responds well to wide variations in changing the approach angle of the insert by pivoting the tool post and changing the actual length of the cut as opposed to depth really well especially on tools like the CNMG when roughing out on the OD, I have also found tightening up anything loose on the machine and bringing in the tailstock close to the headstock and locking it down removes a few mysterious conditions, first job on a cold morning is another tip, hope it goes well for you, good video.

My experience with those tools is that put off long curls, no chips! Especially with the high strength steel you are using. Good luck sir. Looking forward to seeing this machine being built and used. YAY!

Hay mate love the channel we do a fair bit of vig stuff with plenty of groves looks good from here all we do is a 4mm peck on the X leaving a .2 finish cut running along the Y axis.Cheers from Tasmania

Hey. I hear you asking about the internal groving. I do a lot of this in really tough or chewy? (not my default language) material (like soft aluminium or stainless steels) - and depending on my working place, im not able to stand by and watch the whole part running. Best way for me is to interrupt the cut after 1.25 spindel revolutions by withdrawing the tool. So when my feed per revolution is 0.1 i have have 0.125 of cutting dept before i withdraw the tool for 0.15mm or so. It sounds crazy, but works perfect and it isn't that slow as it sounds, when your cnc is able to withdraw the tool in G0.

Here I thought you meant a 3 meter drill as in a metalworking tool to use on the large, but a 3 meter _diameter_ drill is a whole different animal!

Internal grooving, "peck cycle" in your program, will help break chips. Usually there is a parameter for depth of cut per peck.

Cool vid mate

I do like heavy duty machining ! :D I am happy that I found your channel Sir ;D Love cnc machines esspecialy lathes ;)

Good one Matt, I've always been happy if I can get the swarf to curl like that when parting off or cutting any groove. Cheers

Suggestion, get in contact with Titan of Titans of CNC. Might be good resource.

I’m a CNC Machinist in the drilling Industry for NoDig Equipment Perth WA. I use SECO grooving inserts (LCMF160402-0400-FT CP500) at 0.18mm/rev and 130m/min. I use Korloy part-off inserts (Saw Man-X) at 0.16mm/rev and 160m/min. If I have bad chip control for grooving or threading I increase the spindle speed. For turning and boring I increase the feed. Usually just on the dials. High pressure coolant will also help. My colleagues use dwelling or pecking to break a chip when grooving. Although iv always managed without it.

Greetings from NSW. I use fanuc and fagor controls at work. I use a pecking grooving cycle for internal work. Usually 0.25 on radius pecks and return 0.05. Doesn't take too much longer and swarf is a better size.

For the grooving insert, try grinding a bigger chip breaker, sometime I do it and it works.

If you're looking to upgrade to a Large-Bore lathe that is really suited for your industry for that next part coming in- look into the Mazak SLANT-TURN series. I think John Hart is the Australian dealer for Mazak

Thats some nice work. Always love making big chips

Hi again. The guy below uses Seco and that is the company I worked for for 28 odd years. The grooving tools he is refering too are one of the best on the maket. However to get chip contol maybe put a pause in the program every few seconds and mechanically break the chip? Cheers Ian, New Zealand

Sounds like you need a vertical boring machine . I run one that swings 1.4 metres they're such a versatile machine and way easier to set up then a horizontal lathe. Cheers.

Mi Matt, I couldn’t help but noticing that when doing a facing job, as the cutter moved towards the centre of the workpiece, the angular velocity increased. Is this a CNC control feature or is it built into basic functions of the lathe? It’s just that I have been looking around for a new lathe and a couple mention automatic speed compensation. I guess it means that you choose a CPM rate and the machine does the rest. Cool!

This drill is gonna be a monster, as well as a huge time/money/materials investment. Got to ask, what on earth needs holes as big and deep as that ? Enjoy watching the videos 👏👏👏

IF you need to break the 🍟🍟on the Internal Grooving Tool. Just program a Chip Break. And maybe increase the Feed Rate to at least 0.20mm per rev 👍

I feel your pain of machining in the relative middle of nowhere. I'm in NZ only 3 other cnc shops in my area (one of which I collaborate with) and not having many people to bounce ideas off of. The other fun is getting tooling when shops are nowhere nearby. I have a customer who keeps sending me parts with 20-30 diameter deepth holes in odd sizes like 3.1mm and wonders why it takes my supplier 3 weeks to to get me parabolic drills delivered from Germany so he can get his parts.

internal grooving sucks full stop. you can get some chips with super aggressive feeds but even then some times you just get thicker flat bar coming out. I would say look at different chip breakers on the insert so talk to you tooling supplier on that. With that said those chips look pretty good to me even if they are a bit of a string of death.

On a cnc you can also force a chip by going out of a cut and back in in intervals. (manual g-code) maybe if your lathe can do that, vary your spindlespeed between for example: 300-600 rpm. (do the math and pick a range of about +- 24-30%

.5mm peck all the way to the bottom of the groove.

Hi Mat. I was wondering how you go for steel and parts deliveries at your location. Is it a logistic nightmare or do you have a reliable delivery system in place? Cheers.

Is your machine capable of spindle speed variation? I used to run a large Haas lathe and SSV was like a cheat code through all kinds of challenges. It may let you peck or dwell to brake the chip without chatter issues.

What kind of coolant are you using causing have never seen red coolant the one used in our apprentice workshop is like a milky color

Take your oversize work to Kurtis, mate.

peck cycle?

Very nicely done sir! Keep up the great work! I cut quite a bit of 4140 (annealed and pre-hard). I have pretty good luck with 'peck' grooving. Running about the same feed and speed. Peck about .5 to 1 mm deep. Mind you, I run Mazaks, so I'm not sure about the G code for that. Hope that helps a little sir.

Can't offer any help i do nothing on the scale you are doing any more but I do watch another chanel CEE. HE IS IN GOLD COAST area does a lot of similar work on or in mining industry may like give him a look see or a call he seam like a fair sort of chap also Liking your work Cheers